Context Of Circular Economy Research Articles

Utilizing electrooxidation for textile effluent wastewater treatment and simultaneous electrocatalytic hydrogen production: Transforming waste into energy and promoting water reuse in a circular economy context

Textile effluent wastewater poses a serious environmental risk because of its high concentration of pollutants, which include organic compounds, heavy metals, and dyes. The present study investigates the technical and economic feasibility of hybrid water electrolysis performances. Specifically, real textile effluent wastewater was utilised to examine simultaneous abatement and electrochemical hydrogen production. The treated water can be recycled in the textile mill, offering the benefits of trash-to-treasure and cost savings through the circular economy. In addition to reducing the environmental impact of textile wastewater, the synergistic approach seeks to maximise its potential for producing hydrogen as clean energy. Here, the commercially available stainless sheet was used as the anode in the electrochemical setup system and the two-dimensional Ti3C2TX MXene was used as the catalyst embedded cathode. The optimal electrode-electrolyte parameter settings resulted in an 83 % decrease in COD level and a degradation efficiency of about 88 %. The potential for widespread adoption in the textile industry is highlighted by the discussion of the economic viability and environmental advantages of using wastewater from textile effluents for pollutant degradation and hydrogen production. Hence, the energy estimation was looked at and estimated in order to evaluate the process viability. For instance, the hybrid electrolysis process uses a very small amount of electricity (0.825 kWh m−3 order−1) and has an apparent operating current (30 mA/cm2). This work could serve as a guide for the methodical assessment and choice of hybrid water electrolysis using actual wastewater. The electrode's recyclability and reuse were proven for possible commercial applications. The stability of the Ti3C2TX electrode over a wide pH range was investigated in order to produce hydrogen on a big scale at a reasonable cost.

Electrochemically Switchable Sulfurized Polyacrylonitrile for Controllable Recovery of Copper in Wastewater Based on Reversible Adsorption/Desorption Regulation.

Within the context of circular economy and industrial ecology, adsorption offers an effective manner for recycling resources from wastewater, but controllable desorption remains a challenge. Inspired by metal-thiol binding and reversible thiol-disulfide redox transformation in biological systems, this study reports the development of a reversible adsorption/desorption (RAD) system for controllable recovery of copper based on electrochemically switchable sulfurized polyacrylonitrile (SPAN). Density functional theory calculations offered theoretical prediction for the formation of S-Cu bonds and reversible weak interaction between S-S bonds and Cu2+. The SPAN anchored onto titanium suboxide ceramic foam (SPAN@TiSO) could regulate Cu2+ adsorption/desorption stimulated by the electrode potential, indicated by the adsorption capacity of 243.3 mg g-1 (30 min) at 0.2 V vs SHE and a desorption efficiency of 98.4% (5 min) at 0.8 V vs SHE. Electrochemical analysis revealed that the reversible redox transformation of S-S/-S- groups in SPAN was responsible for selective adsorption and rapid desorption in response to the electrode potential. This study provides a proof-of-concept demonstration of an electrochemically switchable polymer to build up a reversible RAD system for controllable recovery of heavy metals in wastewater, making value-added resource recovery more efficient, more intelligent, and more sustainable.

Designing the Internal Organization for Circular Economy Innovation: A Knowledge Governance and Microfoundations Approach

Firms implementing circular economy principles in their innovation processes necessitates the redesign of well-established processes and practices. This redesign leverages the various knowledge and practice domains within the firm, at different levels and scales. Despite the importance of knowledge to innovation management, there is a lack of research in innovation studies examining how firms could manage different knowledge flows within the circular economy context. In most research in this area, studies tend to assume that existence of governance mechanisms to manage these knowledge flows. However, given the need for redesigning or introducing entirely new business models to incorporate circularity principles, there is also a need to understand the internal organization that facilitates such changes. In this paper, we conceptualize how organizational mechanisms governing knowledge processes influence firms' adoption of circular-oriented innovation processes. We conclude that firms go through various stages and levels in the adoption process. These levels are linked through situational, action-formation, and transformational mechanisms that govern supportive knowledge processes. We contribute the innovation management literature by linking circular innovation process adoption to knowledge governance and the underlying knowledge processes. Specifically, we highlight the microfoundations nuances of circular-oriented innovation processes adoption that are pertinent to organizing innovation activities within the firm.

The Effect of Including Sea Buckthorn Berry By-Products on White Chocolate Quality and Bioactive Characteristics under a Circular Economy Context

The by-products of the extraction of sea buckthorn (Hippophae rhamnoides L.) concentrated juice may represent a functional food ingredient for white chocolate production, as a rich source of bioactive compounds. The effects of six treatments derived from the factorial combination of two types of by-products (with oil or without oil) and three different concentrations (5%, 10%, and 15%), were assessed on rheological, quality, colour, antioxidant, and mineral properties of chocolate. The 15% addition of full powder led to the highest values of max firmness, total shear energy, shear energy, cohesiveness, gummosity, dry matter, and ABTS, compared to the untreated control, but the two highest concentrations of the oil-deprived powder resulted in the protein content increasing. The full powder addition always raised fat levels. Both the ‘L’ and ‘a’ colour component as well as total carotenoids, β-carotene, lycopene, and vitamin C increased with the rise of H. ramnoides powder addition, compared to the untreated control. The opposite trend was shown by the ‘b’ colour component and pH, whereas polyphenols and antioxidant activity attained higher values with the oil-deprived powder. The content of potassium decreased upon the 15% addition of the Hippophae ramnoides by-product powder, compared to the untreated control, whereas calcium and magnesium increased. The 15% H. ramnoides full powder elicited the augmentation of phosphorus content in chocolate, compared to the untreated control, contrary to the effect of the oil-deprived powder on P and Zn. The employment of SBB by-products highlights the great potential for manufacturing innovative functional foods with high nutritional value, such as chocolate.

How carbon sources drive cellulose synthesis in two Komagataeibacter xylinus strains

Bacterial cellulose synthesis from defined media and waste products has attracted increasing interest in the circular economy context for sustainable productions. In this study, a glucose dehydrogenase-deficient Δgdh K2G30 strain of Komagataeibacter xylinus was obtained from the parental wild type through homologous recombination. Both strains were grown in defined substrates and cheese whey as an agri-food waste to assess the effect of gene silencing on bacterial cellulose synthesis and carbon source metabolism. Wild type K2G30 boasted higher bacterial cellulose yields when grown in ethanol-based medium and cheese whey, although showing an overall higher d-gluconic acid synthesis. Conversely, the mutant Δgdh strain preferred d-fructose, d-mannitol, and glycerol to boost bacterial cellulose production, while displaying higher substrate consumption rates and a lower d-gluconic acid synthesis. This study provides an in-depth investigation of two K. xylinus strains, unravelling their suitability for scale-up BC production.

Biosynthesis of long-chain polyunsaturated fatty acids in the nereid polychaete Hediste diversicolor: Molecular cloning and functional characterisation of three fatty acyl elongases and two front-end desaturases

Aquaculture of carnivorous fish species heavily relies on marine ingredients to guarantee the provision of essential nutrients, including long-chain (C20–24) polyunsaturated fatty acids (LC-PUFA) such as arachidonic acid (ARA, 20:4n-6), eicosapentaenoic acid (EPA, 20:5n-3), and docosahexaenoic acid (DHA, 22:6n-3). These nutrients are crucial for fish growth and neural development, offering significant health benefits to consumers. The rapid growth of global aquaculture production in recent decades, has driven the exploration of alternative and sustainable feeding sources that ensure n-3 LC-PUFA content. Within the context of circular economy, polychaete worms arise as promising candidates for aquafeed formulations, due to the enzymatic capacity for de novo LC-PUFA biosynthesis. The present study focused on the molecular and functional characterisation of elongases (Elovl) and front-end desaturases (Fed) involved in the LC-PUFA biosynthesis of the nereid polychaete Hediste diversicolor. The sequence and phylogenetic analysis established the orthology of three Elovl, identified as Elovl2/5, Elovl4 and Elovl1/7, that have putative functions in the LC-PUFA biosynthesis. Functional characterisation in yeast demonstrated their roles as PUFA elongases, exhibiting affinity towards C18 and C20 PUFA substrates (Elovl2/5) and towards C18, C20 and C22 (Elovl4 and Elovl1/7). Additionally, H. diversicolor possesses two front-end desaturases (Fed1 and Fed2) with Δ5 and Δ6/Δ8 desaturation activities, respectively, thus encompassing all the necessary desaturation reactions involved in the LC-PUFA biosynthesis pathways. These findings, along with the previously characterised methyl-end desaturases, show that H. diversicolor possesses the full enzymatic repertoire necessary to produce LC-PUFA like ARA and EPA. This highlights the potential of polychaetes and other annelids for producing nutrient-rich biomass suitable for aquaculture.

Optimisation goals for efficient construction from reused materials towards a circular built environment

Building materials that are reused in a circular economy context are often non-standard because previous usage has altered their original properties. Material matching algorithms aid design and construction by matching components in stock with those needed in a design. The efficiency of these matches is assessed based on factors such as waste, logistics, and structural applicability. In this paper, we evaluate the efficacy and practicality for design evolution of construction-relevant optimisation goals. We evaluate goals based on their construction-time and design time results, using a software pipeline optimising both the mapping and design. One design was also constructed based on the optimised matching, to assess additional considerations when working component-specific designs. Based on difficulties and inefficiencies observed during fabrication, we propose two alternate matching strategies and compare their effects on the chosen factors. The study reveals that component allocation systems frequently overlook the need for both contingency planning and redundancy in the construction process. Additionally, inaccuracies in inventory tracking can significantly compromise the feasibility of the planned design. The stability of these design assistive techniques strongly affects their ability to be applied in large-volume projects. This implies the need for a new set of objective factors to be incorporated into existing methods of design optimisation.

A circular economy integration approach into vertical farming with computer-based simulation model for resource optimization and waste reduction

Integrating circular economy into vertical farming holds promises to transform the current economic landscape and bolster environmental sustainability. However, knowledge gaps persist regarding the efficiency of vertical farming methods within the circular economy context, particularly in the development of a simulation model aimed at resource optimization and waste reduction. This study aimed to analyze the vertical farming methods in the circular economy framework and introduce a zero-waste circular economy model both experimentally and through simulation. In the study, a circular economy model was proposed and implemented, utilizing waste generated from hydroponics and aquaponics, alongside vermicompost tea and aerobic compost tea/quick compost, as nutrients for six distinct halophyte plants in the secondary farming setup. The model serves as a valuable tool for identifying and assessing critical factors influencing the circular economy principle, as well as for optimizing resource allocation and management. Over six weeks, plant growth was monitored and compared across the vertical farming methods. Results show that both hydroponic and aquaponic waste proved superior growth compared to the alternatives, highlighting vertical farming's potential for the circular economy. Using the results from the experimental observation, a simulation model was developed. The simulation model's accuracy was validated by comparing outcomes with actual data. Furthermore, the model was used to optimize for balancing resources and capacities in each stage of vertical farming. The vertical farming circular economy model proposed in this study can serve as a blueprint for agriculturalists and decision-makers to adopt more sustainable and efficient farming practices that not only reduce waste but also generate profits.

The Procurement 4.0 Contributions to Circular Economy

This study examines the potential of Procurement 4.0 as a driving force for the circular economy. While the circular economy’s principles are gaining increasing importance, their impact on established procurement practices necessitates exploration. This research investigates how Procurement 4.0 contributes to circularity within business processes. By employing the Delphi Method, the study identifies Industry 4.0 applications that hold promise for optimizing procurement within a circular economy framework. The findings demonstrate that Procurement 4.0, aligned with sustainability goals and leveraging enabling technologies, can enhance business competitiveness in a circular economy context.

Sustainable resilient E-waste management in London: A circular economy perspective

The circular economy (CE) is reasoned to organize complex systems supporting sustainable resilience by distinguishing between waste materials and economic growth. This is crucial to the electronic waste (e-waste) industry of developed countries, and e-waste operation management has become their top priority because e-waste contains toxic materials and valuable sources of elements. In the UK, although London Metropolitan city boasts an ambitious sustainable resilience target underlying the context of CE, practical implementation has yet to be feasible, with few investigations detailing if and how the existing target implications enable industrial and social-ecological sectors to continue their performance functionalities in the face of undesired disruptions. In this paper, a dynamic Bayesian Network (dynamic BN) approach is developed to address a range of potential risks. The existing London e-waste operation management is considered as an application of study for sustainable resilience development. Through the utilization of dynamic BN, a comprehensive analysis yields a Resilience Index (RI) of 0.5424, coupled with a StdDev of 0.01350. These metrics offer a profound insight into the intricate workings of a sustainable system and its capacity to swiftly rebound from unexpected shocks and disturbances. This newfound understanding equips policymakers with the knowledge needed to navigate the complexities of sustainable e-waste management effectively. The implications drawn from these in-depth analyses furnish policymakers with invaluable information, enabling them to make judicious decisions that advance the cause of sustainable e-waste management. The findings underscore that the absorptive capacity of a sustainable and resilient e-waste operation management system stands as the foremost defense mechanism against unforeseen challenges. Furthermore, it becomes evident that two pivotal factors, namely “diversifying the supply chain” and “enhancing supply chain transparency,” play pivotal roles in augmenting the sustainability and resilience of e-waste operation management within the context of London's ambitious sustainability targets. These factors are instrumental in steering the trajectory of e-waste management towards a more sustainable and resilient future, aligning with London's aspirations for a greener and more eco-conscious future.

INNOVATIVE TECHNOLOGIES IN CONSTRUCTION WASTE MANAGEMENT IN ACCORDANCE WITH CIRCULAR ECONOMY

This study analyzes contemporary innovative approaches and technologies aimed at reducing construction waste and promoting its recycling, while also exploring their implementation potential within a circular economy framework. The scientific novelty lies in the examination of innovative strategies enhancing construction waste management within the circular economy context, contributing significantly to understanding and utilizing such technologies. Additionally, the practical value of this work is underscored by its provision of actionable insights and global best practices in implementing innovative technologies for construction waste management. The article delves into the significance and opportunities of utilizing innovative technologies within the context of a circular economy, addressing pertinent issues, expanding the understanding of circular economy concepts in construction, and offering practical examples and recommendations for implementation. The impact of circular economy principles on waste reduction and resource optimization in construction is thoroughly analyzed, with a focus on tools and technologies such as secondary resource utilization, 3D printing, Internet of Things, and artificial intelligence to enhance waste management processes, ensuring their sustainability and efficiency. Furthermore, the article showcases successful innovative projects and initiatives globally while examining challenges and future prospects. It advocates for the active adoption of innovative technologies in construction and waste management to foster sustainable development and environmental preservation. By highlighting the intersection of cutting-edge technology and environmental sustainability, this study provides a comprehensive overview of how the construction industry can evolve to meet contemporary environmental challenges, ultimately contributing to a more sustainable and efficient construction sector. The research emphasizes the critical role of integrating technological advancements with circular economy principles to address the mounting issue of construction waste. It explores how the adaptation of these advanced technologies can lead to substantial reductions in waste generation, improved resource efficiency, and the development of sustainable construction practices. The study also underscores the importance of policy support and stakeholder collaboration in facilitating the widespread adoption of these innovative solutions. In conclusion, this article not only presents a detailed analysis of current trends and technologies in construction waste management but also offers a forward-looking perspective on the future of the industry. It serves as a call to action for policymakers, industry professionals, and researchers to embrace and invest in innovative technologies that align with the principles of the circular economy, ensuring a resilient and environmentally responsible construction sector for future generations. Keywords: technologies, management, waste, innovations, economy, efficiency, resources, sustainability, materials, cycle

Nutritional upgrade of olive mill stone waste, walnut shell and their mixtures by applying solid state fermentation initiated by Pleurotus ostreatus

Present study concerns the transformation of the agro-industrial by-products olive mill stone waste (OMSW) and walnut shell (WS) to a protein-enriched animal feedstuff utilizing the solid state fermentation (SSF) technique. For this purpose, various mixtures of these by-products were exploited as substrates of the SSF process which was initiated by the P. ostreatus fungus. The respective results indicated that the substrate consisted of 80% WS and 20% OMSW afforded the product with the highest increase in protein content, which accounted the 7.57% of its mass (69.35% increase). In addition, a 26.13% reduction of lignin content was observed, while the most profound effect was observed for their 1,3–1,6 β-glucans profile, which was increased by 3-folds reaching the 6.94% of substrate’s mass. These results are indicative of the OMSW and WS mixtures potential to act as efficient substrate for the development of novel proteinaceous animal feed supplements using the SSF procedure. Study herein contributes to the reintegration of the agro-industrial by-products aiming to confront the problem of proteinaceous animal feed scarcity and reduce in parallel the environmental footprint of the agro-industrial processes within the context of circular economy.

Novel cold and thermally pasteurized cardoon-enriched functional smoothie formulations: A zero-waste manufacturing approach

This study investigated the potential of incorporating cardoon (Cynara cardunculus L.) blades as bioactive and dietary fiber ingredients in vegetable/fruit-based smoothies, within a zero-waste approach. The smoothie formulations were pasteurized by high-pressure (550 MPa for 3 min, HPP) and thermal (90 °C for 30 s, TP) treatments and stored at 4 °C for 50 days. Cardoon-fortified smoothies exhibited higher viscosity, darker color, increased phenolic compound levels, and greater anti-inflammatory and antioxidant activities. Furthermore, the cardoon blade ingredients contributed to a more stable dietary fiber content throughout the smoothies' shelf-life. HPP-processed smoothies did not contain sucrose, suggesting enzymatic activity that resulted in sucrose hydrolysis. All beverage formulations had low or no microbial growth within European limits. In conclusion, the fortification of smoothies with cardoon blades enhanced bioactive properties and quality attributes during their shelf-life, highlighting the potential of this plant material as a potential functional food ingredient in a circular economy context.

What is the meaning of value in a circular economy? A conceptual framework

Today, the concept of a circular economy (CE) has become omnipresent. Central to this concept is the term value, however, it is not properly defined, which leads to different interpretations, and hinders implementation of the CE concept. Hence, this article operationalizes the theoretical concept of value into a more practical understanding. First, the meaning of value within the CE context is examined, followed by the development of a framework wherein value is decomposed into two essential types; functional and created value. Next, the framework is applied to an illustrative case study involving four different end-of-life strategies: landfilling, closed loop recycling, remanufacturing and reusing. The framework enables a holistic comparison of the different strategies, represented in a visually compelling way, and clarifies the connection between theoretical CE concepts and practical measures. Consequently, it enhances the understanding of existing CE indicators and serves as a stepstone for the development of new indicators.

The pathways to lean manufacturing for circular economy: Implications for sustainable development goals

Purpose This study aims to address the critical challenge of implementing lean manufacturing (LM) in emerging economies, where sustainability complexities on the production floor hinder production efficiency and the transition towards a circular economy (CE). Addressing a gap in existing research, the paper introduces a path analysis model to systematically identify, prioritize and overcome LM implementation barriers, aiming to enhance performance through strategic removal. Design/methodology/approach The authors used a mixed-method approach, combining empirical survey data with literature reviews to pinpoint key LM barriers. Using the grey-based Decision-Making Trial and Evaluation Laboratory (DEMATEL) along with the Network Knowledge (NK) method, they mapped causal relationships and barrier intensities. This formed the basis for developing a path simulation algorithm, integrating heuristic considerations for practical decision-making. Findings This analysis reveals that the primary barriers to LM adoption is the negative perception and inadequate understanding of lean tools and CE principles. The study provides a strategic framework for managers, offering new insights into barrier prioritization and overcoming strategies to facilitate successful LM adoption. Research limitations/implications This research provides a strategic pathway for overcoming LM implementation barriers, empowering managers in emerging economies to enhance sustainability and competitive advantage through LM and CE integration. It emphasizes the significance of structured barrier management in the manufacturing sector. Originality/value This research pioneers a systematic exploration of LM implementation barriers in the CE context, making a significant contribution to the literature. It identifies, evaluates barriers and proposes a practical model for overcoming them, enriching sustainable manufacturing practices in emerging markets.

Developing an environmental assessment framework for an insect farm operating in circular economy: The case study of a Montréal (Canada) mealworm farm

The concept of a circular food economy, particularly through insect farming using food waste, has gained increasing attention in recent years. This approach holds the potential to reduce the environmental impacts of food production by repurposing food waste as insect feed, while simultaneously offering an alternative source of protein. Although the environmental advantages of insect farming are well established, limited research exists on insect farming in colder regions with cleaner grid electricity, such as Quebec, Canada. In this paper, a framework is developed to evaluate the greenhouse gas emissions of a mealworm farm within a circular economy context. The benefits of circular economy practices are assessed through multiple different feed acquisition scenarios (virgin feed and feed diverted from composting, anaerobic digestion, and landfilling). Furthermore, the benefits of mealworm farming are assessed through a comparative analysis with other sources of protein. The framework consists of five stages: feed acquisition, transformation, heating, transportation, and fertilizer production. The results show that farming mealworms using virgin feed emits +14.94 Kg CO2eq/Kg protein. However, using diverted food waste as feed eliminates the need for conventional waste management and leads to a reduction of greenhouse gas emissions of −1.54, −2.48, and −16.39 Kg CO2eq/Kg protein for food waste diverted from composting, anaerobic digestion, and landfilling, respectively. This study highlights that mealworm farming with virgin feed generates lower greenhouse gas emissions compared to beef and pork and is on par with chicken production. Overall, this study demonstrates the environmental superiority of mealworm farming, whether or not food waste is utilized, in a Canadian context.

Towards circular economy: A IoT enabled framework for circular supply chain integration

Nowadays, the Internet of Things (IoT) has evolved beyond mere buzzword status, emerging as a pivotal force that can confer a competitive advantage in the market. By facilitating seamless communication between objects and the internet, IoT catalyzes unprecedented connectivity between machines and objects. An inherent advantage lies in its capacity to facilitate real-time information sharing, enabling efficient management of vital aspects within the realm of supply chain management, including inventory, products, and orders. Therefore, this study investigates the impact of IoT on supply chain performance, with a specific focus on the mediating role of interconnected systems in the dynamics of supply and demand, and the performance of supply chain firms within a sustainable circular economy context. A survey involving 268 manufacturers forms the basis of quantitative data analysis. Partial Least Square Structural Equation Modelling (PLS-SEM) was employed to test the relationships between latent and construct factors. The results highlight the significant influence of IoT capabilities on both supply chain performance and the integration of internet-enabled supply and demand processes. Concurrently, the study reveals a reciprocal positive effect, as supply and demand integration within internet-enabled supply chains contributes to enhanced supply chain performance. Moreover, the integration of internet-enabled supply and demand processes emerges as a crucial mediator, amplifying the relationship between IoT capabilities and supply chain performance. This study provides valuable insights for managers, researchers, and policymakers, fostering a deeper understanding of the vital role that IoT plays in cultivating and enhancing superior supply chain management practices and overall performance. The study highlights the significant benefits of IoT in enhancing supply chain performance through improved real-time tracking, inventory management, and resource optimization. It also emphasizes the crucial role of integrating internet-enabled supply and demand processes as a mediator, boosting overall supply chain efficiency and responsiveness.

The circular economy rebound effect: Reconceptualizing rebound approaches and mitigation opportunities from an ordonomic perspective

AbstractRecent scholarship has advocated a conceptual investigation of rebound effect theory in the circular economy (CE) context. While the available body of knowledge on a circular economy rebound (CER) is rather scant, this forum article proposes a conceptual view of existing CER approaches. Our analysis reveals that the CER literature has largely bypassed an appreciation of how firm behavior is embedded in and canalized by governance arrangements. This forum article contributes to the literature by reconceptualizing the challenges of mitigating CERs. It proposes to re‐focus the CER debate toward: (i) the innovation need of functional collective commitments for CE to address free‐rider‐problems; (ii) the criticality of effective management of decoupling through innovative circular governance; (iii) the critical reflection of calls for degrowth and “non‐optimization” behavior; and (iv) the recognition of optimization behavior and circular governance frameworks as complementary rather than substitute approaches for facilitating CER mitigation.

Humane Entrepreneurship in the Circular Economy: The Role of Green Market Orientation and Green Technology Turbulence for Sustainable Corporate Performance

The modern business world is confronted with growing social and environmental issues, which pose a serious challenge to pursuing sustainable growth. Drawing from the natural resource base view and stakeholder theory, this study examines the effect of humane entrepreneurship on sustainable corporate performance through the mediating mechanism of green market orientation and the moderating role of green technology turbulence. Cross-sectional data were obtained from Turkish small- and medium-sized enterprises (SMEs) across various sectors. This research adopts a quantitative approach. In total, 393 valid responses obtained from managers of SMEs were utilized to examine the above relationships. The results indicate that humane entrepreneurship has a positive effect on sustainable corporate performance. Humane entrepreneurship has a positive effect on green market orientation. Green market orientation has a positive effect on sustainable corporate performance. The relationship between humane entrepreneurship and sustainable corporate performance is partially mediated by green market orientation. The relationship between humane entrepreneurship and sustainable corporate performance is further strengthened in a highly green technology turbulent environment. The indirect positive effect of humane entrepreneurship on sustainable corporate performance through green market orientation is the strongest when green technology turbulence is high. Simultaneously examining the mediation and moderation relationships, we provide novel insights that extend traditional entrepreneurial vision to a more environmentally conscious humane entrepreneurship approach. The study provides a comprehensive picture of how green market orientation and green technology turbulence are involved in using humane entrepreneurship to achieve superior sustainable corporate performance in the circular economy context.

Occurrence and prioritization of non-volatile substances in recycled PET flakes produced in China

Recycled PET (rPET) is gaining popularity for use in the production of new food contact materials (FCMs) under the context of circular economy. However, the limited information on contaminants in rPET from China and concerns about their potential risk are major obstacles to their use in FCM in China. Fifty-five non-volatile compounds were tentatively identified in 126 batches of hot-washed rPET flakes aimed for food packaging applications in China. Although the 55 substances are not necessarily migratable and may not end up in the contacting media, their presence indicates a need for proper management and control across the value chain. For this reason, the 55 substances prioritized on the basis of level of concerns and in-silico genotoxicity profiler. Among them, dimethoxyethyl phthalate, dibutyl phthalate, bis(2-ethylhexyl) phthalate were classified as level V substances, and Michler's ketone and 4-nitrophenol were both categorized as level V substances and had the genotoxic structure alert, while 2,4,5-trimethylaniline was specified with genotoxic structure alert. The above substances have high priority and may pose a potential risk to human health, therefore special attention should be paid to their migration from rPET. Aside from providing valuable information on non-volatile contaminants present in hot-washed rPET flakes coming from China, this article proposed a prioritization workflow that can be of great help to identify priority substances deserving special attention across the value chain.