Reutilization Of Waste Research Articles

The Utilization of Crushed Corn Cob as a Sand Substitute in Portland Cement Mortars for Sustainable Construction

The utilization of mineralized sandy shredded corn cob (SCC) as a partial replacement for fine aggregate in Portland cement mortars (PM) presents an innovative opportunity for sustainable construction and organic waste reutilization. This study aims to assess the impact of SCC, with granulometric variations G1 and G2, on eight mortar formulations (PM, SCC-G1-5%, SCC-G1-10%; SCC-G2-5%, SCC-G2-10%, SCC-G2-15%, SCC-G2-20%, and SCC-G2-30%) with a consistent water-to-cement ratio of 0.55. Fresh-state properties (flowability, temperature, pH, unit weight, and setting time) and hardened-state characteristics (compressive strength at 4, 7, 14, and 28 days) were evaluated. Notably, flowability decreased by 90% for G2 designs with up to 15% SCC, unit weight decreased by up to 12% with SCC-G2-30%, setting time was delayed, and compressive strength for all SCC mortars up to 20% exceeded 21.9 MPa. In conclusion, the partial replacement of sand with a G2 particle-size distribution of SCC is feasible, with an optimal performance observed in SCC-G2-5%.

The Influence of Excitation Method on the Strength of Glass Powder High-Strength Cementitious Materials

Recycling economy and the re-utilization of solid waste have become important parts of sustainable development strategy. To improve the utilization rate of waste glass, glass powder high-strength cementitious material (GHSC) was prepared by replacing part of the cement in the cementitious material with ground waste glass powder. Firstly, the effect of glass powder particle size on the flexural and compressive strength of GHSC was investigated by the gray correlation method, and the optimal grinding time was obtained. Additionally, the effect of the magnitude of steam curing temperature and the length of steam curing time on the compressive strength and flexural strength of GHSC was investigated, and the mechanism of the effect of the curing regime on the strength was explored by examination of the microstructure. Finally, to simplify the curing process of GHSC, the effects of Ca(OH)2 and Na2SO4 as excitation agents on the compressive strength and flexural strength of GHSC at different dosing levels were compared. The results showed that glass powder with a particle size of less than 20 μm would improve the compressive strength and flexural strength of the specimen. Steam curing can significantly improve the flexural strength and compressive strength of GHSC specimens. At a steam curing temperature of 90 °C for a duration of three days, the compressive strength and flexural strength of GHSC increased by 76.7% and 98.2%, respectively, compared with the standard curing specimens. Ca(OH)2 and Na2SO4 as excitation agents significantly enhanced the compressive and flexural strengths of GHSC under standard curing conditions.

Captivating actions of pomological crops waste as biosorbents for environmental remediation: a comprehensive review.

Water pollutants are an emerging environmental hurdle for crop production and human health risks. In recent decades, the removal of contaminants from water using a cutting-edge approach like biosorbents is a strategy that is both cost-efficient and sustainable. For instance, since biowaste from fruit crops implies the frequent occurrence of average annual waste, it is imperative to formulate strategic initiatives to mitigate this emerging problem while simultaneously recognizing the potential for reutilization and reintroduction of such waste into the industrial sector. Fruit crops such as peels, seeds, skins, branches and stalks can be altered into biosorbents for water treatment. Partially mitigating the adverse impacts of biowaste that estimate to incur costs of billions of dollars around the world would be achieved with this engineering application. This review provides a perspective on the existing literature and brings up-to-date information and findings in the field of pomological crop waste as biosorbents for environmental remediation. In this way, we review the detrimental impact of environmental contaminants on biological organisms and different types of fruit crop waste and their utilization for wastewater treatment, with special emphasis on the formulation of biowaste sorbents (removal efficiency is > 80%) and their application for capturing pollutants such as heavy metals, organic and inorganic dyes and oils. Besides, the newly invented techniques for the characterization of fruit-based biosorbents, the parametric evaluation of biosorbents and their comparison with other available biosorbents are discussed. This review will be helpful for remediating contaminants in wastewater and a panacea for practical engineering solutions.

A mathematical programming based decision support system for waste to resource market trading

In a linear economy, consumers typically dispose end-of-life products which are eventually incinerated or landfilled. Digital platforms could unlock rich waste reutilization opportunities and economic benefits by connecting the waste producers with potential waste buyers in online marketplaces. While previous studies mostly focus on input-output matching, this study proposes a decision support system that can be incorporated to an online marketplace to optimize the waste trading based on economic considerations. Moreover, the decision support system could facilitate higher level decisions such as capacity planning and incentive design. Based on a case study on Singapore’s organic waste streams, the waste trading platform presents economic benefits for agents that sell their waste. Additionally, enforcing waste reutilization targets would require relevant policy support in terms of incentives or levies, where the levies can be implemented as co-payment rate for the agents. For instance, results showed that when the food waste reutilization target is set as 6 t/d, increasing the co-payment rate from 0 to 20% allows the waste trading network to be self-sustaining without external funding. Finally, sensitivity analyses show that collecting more waste records in the database helps in optimizing the investment decisions, preferably when the number of records exceeds 64.

Recycled solar-grade silicon kerf scraps and sandwiched by tunable porous carbon sheets as commercial anodes

To commercialize silicon/carbon (Si/C) anodes easy, the solar-grade silicon kerf scraps (SGSKS) abandoned from photovoltaic industry are purified and recycled as a cost-efficient silicon source for lithium storage. However, limited by commercial cathodes, pursuing good structural integrity and durable lifespans is more worthy of concern than super-high capacity for commercial Si/C anodes which is primarily impacted by silicon mass fraction and volume vibration tolerance. Hence, controlling silicon mass loading and providing sufficient void spaces for volume vibration are significant for the high-grade Si/C anodes. Herein, a highly-tunable and facile synthesis approach for Si/C composite sandwiched by porous carbon sheets (PCS/Si) is described using flake-like CaCO3 as template and SGSKS as raw materials. Through regulating the mass ratio of CaCO3 and silicon, it can effectively control silicon mass loading and void spaces in PCS/Si for strengthening structural integrity, prolonging lifespans, simultaneously achieving sufficient capacity to meet commercial demands. The experimental findings demonstrate that benefitting from this deliberate design, the optimized PCS/Si-2 composite with silicon mass loading of 30.62 wt% delivers a high-profile capacity retention of 853.4 mAhg−1 at 0.2 Ag−1 with a relatively good structural integrity. Moreover, full cells using PCS/Si-2 anodes matched with commercial LiCO2 cathodes exhibit a long-cycle steady capacity of 103.4 mAhg−1 at 0.2 C which also can light a row of LED bulbs for hours, facilitating a rosy potential for commercial application. Meanwhile, it offers an alternative and valuable viewpoint for high-value recycle and reutilization of photovoltaic waste, promoting resource conservation and environment protection.

Waste feather keratin composited geopolymer hydrogels for improving plant water retention and N nutrients utilization

To improve cyclic utilization of waste feather resources and enhance the efficiency of crop fertilizer, a novel superabsorbent slow-release hydrogels were prepared by feather keratin (FK), diatomite geopolymer (DG), urea and acrylic acid (AA) with thiol−ene click reaction and in-situ polymerization, which afforded FK composited DG polymer hydrogels containing urea (Urea@FK/DG-HGs). After characterizing structure and microscopic morphology, its swelling capacity, water retention and slow-release behavior were investigated. The obtained Urea@FK/DG-HGs presented good swelling, cyclic stability, foliar adhesion, water retention and slow-release properties. The swelling ratios got to 666.67 g/g in distilled water and 107.53 g/g in the saline solution (0.9% NaCl), respectively. The swelling rate was still 209.9 g/g after recycling 8 times. It enhanced the water retention performance of the soil and prolonged nutrients release, which the cumulative release of urea was 34.8% after 45 days, and the release behavior was belong to Fickian diffusion. Furthermore, the obtained Urea@FK/DG-HGs was used in agricultural applications to improve plant growth and proved to have a promotional effect on the germination and growth of holly seeds. In summary, it was an effective strategy for re-utilization of agricultural waste by adding waste feathers keratin into slow-release hydrogel. And the obtained multifunctional materials (Urea@FK/DG-HGs) with excellent water retention, slow-release and promotion of plant germination, has great application potential in agriculture industry.

Chemical looping CO2 capture and in-situ conversion as a promising platform for green and low-carbon industry transition: Review and perspective

Industrial flue gas and solid waste with the characteristics of large emissions and complicated distributions are two issues for industry, due to that sequential CO2 capture and utilization for flue gas shows high energy-cost penalties and solid waste faces with low reutilization ratio. As a powerful process intensification strategy, chemical looping CO2 capture and in-situ conversion (CL-ICCC) provides an effective solution to handle those two issues. However, current researches on CL-ICCC aim to develop process configurations, design bifunctional materials, and reveal reaction mechanisms, which ignore how to apply CL-ICCC for realizing flue gas purification and solid waste reutilization simultaneously in industry. Herein, after reviewing the current status of CL-ICCC for flue gas upgrade, industrial solid waste reutilization and industrial system integration, a perspective is proposed to highlight CL-ICCC as a promising platform for green and low-carbon industry transition. In the proposed system, industrial flue gas enters the capture reactor and reacts with industrial solid waste derived bifunctional materials to separate CO2 from other impurities. In the conversion reactor, reduction agents are introduced to spill CO2 over bifunctional materials and convert it into value-added chemicals. This review and perspective provide a new pathway to establish a low-carbon and self-digestion industrial system.

Reutilization of food industrial waste for lutein production with heterotrophic microalgae Chlorella sorokiniana MB-1-M12

BackgroundLutein is a xanthophyll carotenoid commonly found in photosynthetic organisms, such as microalgae and plants. It serves as a photosynthetic accessory pigment and possesses antioxidant properties. Lutein is recognized for its prophylactic use in preventing Age-Related Macular Degeneration (AMD) and is widely employed in health supplements. The demand for lutein is steadily increasing. This study utilized Chlorella sorokiniana MB-1-M12 for heterotrophic growth and lutein production, employing molasses as a model of food industrial waste as an alternative carbon source. MethodsMolasses was hydrolyzed using acids, and the optimal hydrolysis conditions were determined by varying the types and concentrations of the acids. The resulting hydrolysate, which contains reducing sugars, was then recovered and used to support the heterotrophic growth of C. sorokiniana MB-1-M12 for lutein production. Significant FindingsThe best efficiency in molasses hydrolysis was achieved using 0.15 M sulfuric acid, resulting in a maximum sugar recovery of 0.721 gs of reducing sugar per gram of molasses. When the molasses hydrolysate reached a sugar concentration of 10 g/L, it yielded a biomass of 2.57 g/L and a lutein content of 2.1 mg/g. These findings indicate that molasses can effectively serve as a substitute for glucose as a carbon source, although it cannot provide all the essential micronutrients required for biomass growth. Consequently, the addition of nutrients in BG-11 medium became necessary. This study successfully demonstrates the upcycling of waste resources, such as molasses, into a high-value product like lutein, all achieved in a cost-effective and resource-efficient manner.

A strategy for reutilization of solid waste by using industrial soda residue to construct calcium vanadate nanomaterials for high-performance aqueous Zn-ion batteries

Here, efficient recycling of waste is incorporated into designing energy storage materials to satisfy the pressing demand of sustainable energy storage technologies. CaV4O9 nanomaterials were firstly synthesized by a hydrothermal route using industrial waste soda residue as raw material, which were used us cathode material for high-performance aqueous Zn-ion batteries. The prepared CaV4O9 nanomaterials display a relatively higher discharge capacity of 292 mAh g−1 at 0.1 A g−1 in combination with a better cycling performance (capacity retention of 82.8% after 1000 cycles at 5.0 A g−1) and an enhanced rate performance, its electrochemical performance is obviously superior to that of calcium vanadate obtained by analytical purity calcium carbonate as raw material. The superior electrochemical performance should be ascribed to the doping effect of metal ions in the CaV4O9 coming from soda residue. This strategy provides a new idea for the high-value and fine utilization of solid waste in energy storage field.

Waste sulfur from biogas desulphurization: a supplement of Brassica napus L. nutrition

The content of sulfur in soils has been declining. Possible option to supply sulfur into the soil can be utilization of waste sulfur from biogas production. Two pot experiments with identical treatments were established to examine the effect of waste sulfur from biogas plant applied solely and in mixture with other nutrients on the growth and yield of oilseed rape. The included treatments were control, waste elemental sulfur (S), S + boron (B), S + B + humic substances (HS), S + B + HS + ammonium sulfate (AS), S + B + HS + ammonium nitrate (AN). The results from the first experiment showed significant increase in N-tester values and aboveground biomass after the treatments with S enhanced with both mineral fertilizers compared to any other treatments. The content of N and S in plants was also higher after these treatments. This was confirmed by second experiment. The seed yield was highest after the same treatments. The result from both experiments proved, that reutilization of waste S can be an interesting option. The application of sole waste S is a viable possibility. However, the mixture of sulfur with AS and AN is a more optimal alternative. Such combination could lead to better N use efficiency due to the co-application of N and S and also presents an interesting compromise to an overall lower consumption of mineral fertilizers (especially N) while adding more sulfur to the soil, especially in mixture with AS. This treatment resulted in the highest seed yield and production of oil in comparison with any other treatment.

Integrated network analysis on industrial symbiosis: Case study of Qinghai salt lake industrial park

Implementing industrial symbiosis has emerged as a pivotal strategy for establishing eco-industrial parks worldwide to promote sustainable development and optimize resource utilization within industrial parks. However, the present evaluation framework for industrial symbiosis is nascent, which may hinder the ecological development of industrial parks. Therefore, to gauge industrial symbiosis efficacy and infrastructure soundness, we propose a revolutionary evaluation system that amalgamates social network analysis and ecological network analysis methodologies. Our evaluation system is meticulously customized to cater to the distinctive features and analytical requirements of eco-industrial parks and encompasses three primary facets: impact dissemination, sustainability, and resource optimization. To demonstrate the effectiveness of the proposed evaluation system, we conducted a case study of Qinghai Salt Lake industrial park. The findings reveal that the industrial symbiosis level in Qinghai Salt Lake industrial park (QSLIP) improved during 2014–2018. Nevertheless, conventional indicators are unable to pinpoint certain issues, such as deterioration in waste reutilization quality, underscoring the significance and necessity of the indicator system proposed in this study.

Renewable Energy from Livestock Waste Valorization: Amyloid-Based Feather Keratin Fuel Cells.

Increasing carbon emissions have accelerated climate change, resulting in devastating effects that are now tangible on an everyday basis. This is mirrored by a projected increase in global energy demand of approximately 50% within a single generation, urging a shift from fossil-fuel-derived materials toward greener materials and more sustainable manufacturing processes. Biobased industrial byproducts, such as side streams from the food industry, are attractive alternatives with strong potential for valorization due to their large volume, low cost, renewability, biodegradability, and intrinsic material properties. Here, we demonstrate the reutilization of industrial chicken feather waste into proton-conductive membranes for fuel cells, protonic transistors, and water-splitting devices. Keratin was isolated from chicken feathers via a fast and economical process, converted into amyloid fibrils through heat treatment, and further processed into membranes with an imparted proton conductivity of 6.3 mS cm-1 using a simple oxidative method. The functionality of the membranes is demonstrated by assembling them into a hydrogen fuel cell capable of generating 25 mW cm-2 of power density to operate various types of devices using hydrogen and air as fuel. Additionally, these membranes were used to generate hydrogen through water splitting and in protonic field-effect transistors as thin-film modulators of protonic conductivity via the electrostatic gating effect. We believe that by converting industrial waste into renewable energy materials at low cost and high scalability, our green manufacturing process can contribute to a fully circular economy with a neutral carbon footprint.

Gasified olive stone biochar as a green construction fill material

The rapid growth in biomass waste generation from industrial and agricultural sectors has emerged as a significant global challenge. One potential solution to address this challenge is to utilize biomass waste materials as sustainable construction materials, which can mitigate landfilling concerns, reduce the need for natural materials and ultimately minimize carbon emissions. This study focused on the evaluation of the engineering and environmental properties of olive stone biochar (OSB) as a green construction fill material. OSB is the solid residue resulting from biomass gasification in a waste-to-energy plant. The properties of OSB were compared to those of recycled glass (RG), a mainstream construction and demolition (C&D) waste material in Australia, for benchmarking purposes. Extensive laboratory tests were conducted on unbound OSB, RG and OSB/RG blends. The results indicated that gasified OSB was a stable biomass material and it exhibited good engineering performance when used as a construction fill material. In cases where higher strength was required, OSB can be blended with RG to achieve higher values of California bearing ratio (CBR) and resilient modulus. All OSB/RG blends were found to meet the minimum CBR requirement for subgrade materials as specified by the local road authority. Environmental tests revealed that the application of OSB as a construction fill material would not have any adverse environmental impact. This research highlighted the potential for OSB to replace virgin quarry materials in geotechnical fill and road subgrade applications. The involvement of biochar as a carbon sink in construction works also aligns well with the strategy to manufacture green materials within the construction industry, as it serves the dual purpose of locking carbon in a stable state within infrastructures and boosting waste reutilization rates simultaneously.

Effects of recycled mortar powder on the properties and microstructure of magnesium potassium phosphate cement

Magnesium potassium phosphate cement (MKPC) has become a popular research topic owing to its rapid hardening and high early strength. However, its high carbon emissions and cost limit its large-scale applications. To reduce MKPC’s carbon emissions and preparation costs and to improve the resource reutilization of construction waste, we investigated the effects of the particle size and dosage of recycled mortar powder (RMP) on the setting time, mechanical properties, physical phase, and microstructure of MKPC. The results indicated that when the particle size of RMP increased from 30 to 66 μm, the setting time of MKPC increased from 10.5 to 13.1 min, and the compressive strength (at 28 d) decreased from 52.4 to 38.0 MPa. Therefore, increasing the RMP particle size can prolong the setting of MKPC and reduce its compressive strength. Additionally, increasing the dosage of RMP reduced the setting time of MKPC and promoted the development of compressive strength in later stages. When the RMP dosage increased from 0% to 40%, the setting time of MKPC decreased by 26.1%, and the compressive strength increased by 50.2%. According to the results of pore structure and microstructural analysis, the incorporation of RMP improves the microstructure of MKPC, significantly enhancing its mechanical performance. Therefore, RMP can be used as an economical and ecofriendly cement blending material to reduce the preparation cost of MKPC and the carbon emissions of the construction industry and improve the resource reutilization of construction waste.

Recent Advances on Porous Siliceous Materials Derived from Waste.

In recent years, significant efforts have been made in view of a transition from a linear to a circular economy, where the value of products, materials, resources, and waste is maintained as long as possible in the economy. The re-utilization of industrial and agricultural waste into value-added products, such as nanostructured siliceous materials, has become a challenging topic as an effective strategy in waste management and a sustainable model aimed to limit the use of landfill, conserve natural resources, and reduce the use of harmful substances. In light of these considerations, nanoporous silica has attracted attention in various applications owing to the tunable pore dimensions, high specific surface areas, tailorable structure, and facile post-functionalization. In this review, recent progress on the synthesis of siliceous materials from different types of waste is presented, analyzing the factors influencing the size and morphology of the final product, alongside different synthetic methods used to impart specific porosity. Applications in the fields of wastewater/gas treatment and catalysis are discussed, focusing on process feasibility in large-scale productions.

Preparation and sound absorption properties of multi-layer composites formed by waste polyphenylene sulfide filters

Composite materials with multi-layer structure were prepared by combining polyurethane film and waste polyphenylene sulfide filters by hot melting, which could be used as sound-absorbing materials to contribute to the noise control and reutilization of industrial waste. The structure, mechanical property, pore size distribution and stability of waste polyphenylene sulfide filters were investigated and could directly affect the quality of recycled products. The effects of layer numbers, layering sequence and polyurethane film thickness on sound absorption and insulation properties were also analyzed using an impedance tube absorption test system. The results showed that multi-layer materials had a better sound absorption effect than single-layer polyphenylene sulfide filters at low frequency. The sound absorption coefficients of the single-layer sample was only 0.081 at 1000 Hz, while the sound absorption coefficients of the five-layer sample could reach 0.26. The sound absorption properties of multi-layer materials were slightly affected by layering sequence, but polyurethane film thickness had a significant effect on sound absorption properties. The α of the SUS1 and USU1 samples were 0.151 and 0.170, while the α of the SUS3 and USU3 samples were only 0.076 and 0.056, respectively. Meanwhile, the sound insulation properties of multi-layer materials could be significantly influenced by the polyurethane film position. The sound transmission loss of the SUSUSU3 sample was just 32.83 dB, whereas that of the USUSU3 sample could reach 47.94 dB. Moreover, when polyurethane film was located on the sound facing side of multi-layer materials, the increase in polyurethane film thickness could cause the average sound reduction index of the USUSU sample to increase from 28.76 dB to 47.94 dB.

Implementing circular economy principles in the apparel production process: Reusing pre-consumer waste for sustainability of environment and economy

Environmentalists, the government, and the factory have always been more concerned with the inevitable pre-consumer waste produced by the apparel sector. The sustainable management of this enormous waste has received substantial attention from researchers. This study aims to experiment with a fresh approach to circular fashion, applying the circular economy principle of ‘reusing’ to manage the pre-consumer waste sustainably generated in the cutting section of the apparel industry. A specific style (boy’s t-shirts) has been assessed to trace, gather, classify and quantify the reusable cutting waste produced in a factory located in Dhaka, Bangladesh, to introduce circular fashion (toddler t-shirts) and integrate circularity practices in the existing production process. It has been found that approximately 2238 pieces of circular products (CP) can be produced from the 218.6 kg surplus fabric, 212.13 kg reusable cutting waste and 210 reusable rejected cut panels. The approach followed in the study has presented the shortest loop of the circular economy consisting of the stages of gathering, sorting, redesigning, re-cutting, and sewing process. The investigation further demonstrates that, concerning ecological sustainability and economic feasibility, the direct reutilization of pre-consumer waste of cutting sections could prove more efficient than recycling, landfilling, or incineration.

Waste catkins-derived graphitic carbon/Co3O4 composites as long-life and high-rate anodes for lithium-ion battery

Upgrading waste re-utilization has been regarded as an important concept to promote the sustainable development of social economy. Herein, waste catkins were used as carbon source and template to prepare graphitic carbon/Co3O4 composites through cobalt salt immersion, in-situ carbonization and calcination. The obtained Co3O4/C composites inherit the microtubular structure of catkins with ultra-thin tube wall and large tube cavity. Particularly, the sample (Co3O4/C-280) calcined at 280 °C in air shows a morphology of the hollow Co3O4 spheres (av. 50 nm) evenly embedded on the biocarbon tube. As an anode for lithium-ion battery, such unique structure is more conductive to alleviate volume expansion. As expected, Co3O4/C-280 electrode has excellent rate capability at 5 A g−1 and stable long-cycle performance (647.3 mA h g−1, 1800 cycles, 1 A g−1). The presence of pseudo-capacitance behavior plays an important role in improving the capacity of material. The good electrochemical properties of Co3O4/C-280 can be ascribed to the synergistic effect of hollow tubular structure and graphitic carbon. Therefore, the strategy of making waste profitable is in line with the theme of green and sustainable development, and provides a reference for improving lithium storage performance of Co3O4-based anode materials.

Nutrient Composition of Phosphorus Enriched Compost from Seafood Processing Unit Waste

Seafood is gaining in popularity because of its health benefits. At the same time, large amounts of fish waste are being generated, mostly from the industrial processing of fish. These large quantities of fish waste have not been utilized efficiently, and the disposal of fish waste can have large negative impacts on local environments. Unutilized fish waste is often disposed of by land fill or incineration, or by dumping into the sea. Therefore, there is an urgent need to find ecologically acceptable means for reutilization of fish waste. In this study, fish waste samples are collected and characterised. The fish waste was acidic in pH (6.1) with EC of 3.8 dSm-1. The total N, P, K of the fish waste was 10.17, 0.20 and 0.74 % respectively. It also had an appreciable amount of organic carbon content 46.22%. Fish waste was mixed with saw dust (2:1) and Rock Phosphate - Phosphorus (RP-P) at the rate of 0, 2.5, 5, 7.5 and 10 % for enrichment of compost The results showed that the application of different levels of (RP-P) reduce the pH, slightly increased the EC, N,P,K and Organic carbon content. Thus, rock phosphate enriched fish waste compost could be an alternative and viable technology to manage the solid waste generated from the seafood industries as well as crop production.

Application and functionalization of toxic waste sludge-derived biochar for efficient phosphate separation from aqueous media: Toxicity diminution, robust adsorption, and inner mechanism

Phosphorus control and the disposal of municipal solid waste have drawn increasing concerns. Herein, we reported the reutilization and functionalization of highly toxic waste sludge derived from landfill leachate treatment process for biochar preparation and therefore phosphate elimination from aqueous media. Toxicity analysis confirmed largely declined heavy metal leaching and diminished ecological risks during biochar pyrolysis, providing a feasible option for the disposal and reutilization of toxic waste. Pre-loading of lanthanum rendered fabricated biochar with robust phosphate adsorption capacity, with optimized composite achieving maximum capacity of ∼94.4 mg P/g at pH 6. Effects of environmental factors, especially co-existing species (anions, cations and dissolved organic matters), were systematically evaluated combining experimental results and characterization analysis. Thereafter, adsorption behaviors of synthesized samples including kinetic, isotherm and thermodynamics were comprehensively explored. In virtue of characterization analysis, physicochemical properties of different composites and phosphate separation mechanism that involved electrostatic attraction and inner-sphere complexation were fully probed. Overall work investigated the feasibility of toxicity reduction via pyrolysis, phosphate uptake performance and inner mechanism, therefore highlighting the potential of waste reutilization for environmental remediation.