Food Containers Research Articles

Social Enterprise Referents: How Social Enterprises Help Organize Nascent Fields to Address Complex Societal Problems

AbstractAddressing societal challenges requires engaging diverse actors, but clashes between social and commercial interests often hinder coordination. In established fields, conflicting social interests can be integrated by challenging dominant commercial positions and rallying powerful actors. However, creating new fields without established actors and coordination mechanisms is more complex, especially when interests conflict. We explore this challenge through the development of reusable containers for takeaway food and beverages, where incompatible perspectives initially led to a field impasse. A pioneering social enterprise blending commercial and social interests emerged as a referent, facilitating collaboration and breaking the impasse. After initial field organizing succeeded, regulatory changes and increased demand exposed the shortcomings of early solutions, leading to setbacks. New social enterprises developed solutions to fill supply–demand gaps, anchoring new models in a market and driving both standardization and innovation. We introduce the concept of ‘social enterprise referents’ to highlight their essential role in organizing nascent fields to address complex societal issues. Without these referents, models for building new fields struggle to take hold. Successfully transitioning from an underorganized to an organized field requires sustained efforts from multiple social enterprise referents to anchor solutions in a market and uphold collaboration with field actors.

Fresh insights into structure-function-integrated self-antibacterial Cu-containing Al alloys: giving Al alloys a new function.

Contact infection by bacteria and viruses is a serious concern to human health. The increasing occurrence of public health problems has stimulated the urgent need for the development of antibacterial materials. Al alloys are the fastest-growing mass-produced material group, a prerequisite for the lightweight design of vehicles, food containers and storage, as well as civil-engineering structures. In this work, the structure-function-integrated concept was used to design and produce self-antibacterial Al-xCu (x = 2.8 and 5.7) alloys for the first time ever. The antibacterial tests indicated that Al-2.8Cu and Al-5.7Cu alloys provided a stable and efficient bacteriostatic rate against S. aureus and E. coli, which was 87% for Al-2.8Cu and 100% for Al-5.7Cu against S. aureus at 24 h, and 89% for Al-2.8Cu and 94% for Al-5.7Cu against E. coli at 24 h. The antibacterial effect was similar to the commonly-used antibacterial materials with a similar Cu content. Furthermore, the mechanical properties and corrosion resistance of Al-2.8Cu and Al-5.7Cu were comparable to those of the current commonly-used commercial casting Al-Cu alloys. Structural insights into the performance and biomedical function by Cu-rich precipitates provided understanding of the mechanisms of these structure-function-integrated self-antibacterial Cu-containing Al alloys: (i) the Cu-rich precipitates produced strengthening, and (ii) the immediate contact with Cu-rich precipitates and the Cu2+ caused a synergistic action in improving antibacterial activity. This work gives Al alloys a new function and inspires fresh insights into structure-function-integrated antibacterial Al alloys.

PlaBacter: Determination of Microbial Diversity on Plastic Polymers in Topçu Pond

Climate change is one of the biggest problems of our world, and one of the biggest measures taken to solve the climate crisis is to reduce the consumption of oil and oil derivatives, which are considered among fossil resources. However, with the globalising world and increasing population, oil companies have turned to the plastic and packaging sector in order to meet the increasing demand for plastic consumption. This situation inevitably increases the environmental damage of plastic waste. In particular, the inability to use water resources correctly and the pollution of water by wastes left in the environment adversely affect the lives of living things on earth. Within the scope of the study, it was aimed to determine the microbial diversity living on polyethylene terephthalate (PET), which is known as the raw material of tools such as plastic bottles, food containers, and fishing line, which are left as waste in the environment, especially in rivers and lake shores. In this context, Topçu Pond, which is an important water source in the field of agricultural irrigation in Yozgat province, was selected as the study area. Genomic DNA (gDNA) was isolated from biofilm layers formed on water, sediment, and PET samples collected from the study area. The bacterial communities living in the samples were identified by analysing the 16S rDNA of the gDNAs with the next-generation sequencing method. Thus, we conducted the first microbial diversity study in Topçu Pond and defined the bacterial composition on PET samples in the pond.

Surface treatments on commercial glasses: durable impact on the retention of lead, barium and boron

Glass durability is one of the properties that can be affected by surface treatments such as coatings or chemical attacks. These treatments can be used to reduce the quantities of potentially toxic elements contained in glass that may be released in solution. Five surface treatments were selected: three different coatings (SnO2, TiO2, SiO2) and two acidic attacks (SO2 dealkalization and acid polishing). These treatments were performed on five glass compositions (soda-lime, borosilicate, barium silicate, opal, and lead crystal). Their effects on alteration rates and mechanisms were investigated through a single protocol (acetic acid 4%, 70 °C) simulating accelerated aging conditions for containers of beverages or food. The data collected over 1.3 years showed significant reduction of lead leaching with all treatments except acid polishing. The best reduction factor was obtained with SO2 dealkalization, which also demonstrated beneficial effects towards the retention of Ba by reducing the diffusion of alkalis.

Research on residual stress control in polycarbonate molding based on orthogonal analysis

Abstract Residual internal stress is a primary factor affecting the performance and quality of transparent food containers formed by polycarbonate injection molding. Adjusting the injection molding process parameters stands out as the most effective means to control residual internal stress. This study employs numerical simulation to analyze the influence of injection molding process parameters on material internal stress during the polymer injection molding process, providing a reference for optimizing molding process parameters. Initially, through an analysis of the mechanism of internal stress formation, it is determined that the internal stress of beverage containers is mainly composed of cooling internal stress. Consequently, a mathematical model based on thermo-viscoelastic constitutive relations is selected to numerically simulate and calculate the formation of cooling internal stress during the injection molding process of PC materials. Numerical simulation results are obtained accordingly. Building upon this, orthogonal experiments are conducted based on the analysis data from numerical simulation, and through experimental comparison, the consistency between numerical simulation results and experimental results is validated. Finally, combining the results of experiments with numerical simulation, it is concluded that melt temperature is the primary factor influencing molding internal stress, followed by mold temperature and holding pressure, with injection speed being the least influential factor on residual stress.

Strength, pliability, and hydrophobicity of mung bean starch straws: Orientation change caused by annealing time.

To achieve starch straws with high strength and large toughness, the effects of annealing time on structural and functional performances of mung bean starch straws were studied. The results revealed that with increasing annealing time from 0to 60min, the ratios of 1047cm-1/1022cm-1 in Fourier transform infrared spectroscopy decreased from 1.37 to 1.20, and the relative crystallinities decreased from 12.09% to 11.01%. The relative crystallinity increased to 13.28% when annealing time increased to 120min. The maximum bending force increased from 10.93 to 104.24 N, and modulus of elasticity enhanced from 0.93 to 62.68 N/mm when annealing time increased from 0 to 120min. Starch straws annealed for 120min had the lowest water absorption (94.61%), while starch straws annealed for 60min had the highest water absorption (127.38%). This outcome not only lay a theoretical foundation for preparing biodegradable starch straws with excellent performance, but also apply for beverages, food container, food packaging films, and so on, strongly promoting starch industrial transformation and development.

Evaluation of Exposure to Bisphenol A, Bisphenol F, and Phthalates in Patients with Phenylketonuria and Its Differences According to Dietary Status.

Phenylketonuria (PKU) is the most common amino acid metabolism disorder. Patients with blood phenylalanine (Phe) levels of ≥6 mg/dL require treatment, and the most definitive treatment is the Phe-restricted diet. Bisphenols and phthalates are widely used endocrine-disrupting chemicals (EDCs) found in personal care products, baby bottles, and food packaging. In this study, we evaluated the possible routes of exposure to these EDCs in patients diagnosed with PKU (n = 105, 2-6 years of age) and determined the relationship between the plasma levels of bisphenol A (BPA), bisphenol F (BPF), di-butyl phthalate (DBP), di-(2-ethylhexyl) phthalate (DEHP), mono-(2ethylhexyl) phthalate (MEHP), and dietary regimens. Participant characteristics and exposure routes were evaluated according to their dietary treatment status. Thirty-four of these patients were on a Phe-restricted diet, while the remaining 71 had no dietary restrictions. DBP and DEHP levels were higher in those using plastic tablecloths (p = 0.049 and p = 0.04, respectively). In addition, plasma DBP levels were higher in those who used bottled water (p = 0.01). Being under 4 years of age, using plastic food containers, and using plastic shower curtains were characteristics associated with higher MEHP levels (p = 0.027, p = 0.019, and p = 0.014, respectively). After adjustment for baseline characteristics (Model 1), the odds of having a plasma BPA level in the upper tertile were 3.34 times higher in the free-diet group (95% CI = 1.09-10.25). When we additionally adjusted for plastic exposure (Model 2), the odds ratio was found to be 18.64 (95% CI = 2.09-166.42) for BPA. In the free-diet group, the probability of having plasma DEHP levels in the upper tertile was increased by a relative risk of 3.01 (p = 0.039, 95% CI = 1.06-8.60). Our results indicate that exposure to bisphenols and phthalates varies with dietary treatment. The difference in sources of exposure to EDCs between the diet and non-diet groups indicates that diet plays an important role in EDC exposure.

Revealing determinants shaping the sustainable consumption of single-use plastic food container substitutes

With the fast growth of the takeaway sector, waste originating from the consumption of single-use plastic food containers (SUPFC) is increasingly generated and exacerbates plastic pollution. Its substitutes (SUPS), a reliable option for mitigating plastic pollution, are attracting attention from both the public and private sectors. To better understand consumer preferences in reducing plastic pollution from SUPFC, we here establish an intricate fabric of the consumers' cognitive impetus toward SUPS and explore the prospects of combining and enhancing the technology acceptance model and theory of planned behavior framework with additional constructs. We simultaneously analyze variations in Beijing consumers' willingness to pay (WTP) for SUPS via the contingent valuation method. The intention to use (ITU) was found to be positively influenced by the perceived ease-of-use (PEU), attitude (AT), and subjective norms (SN). Conversely, perceived risk exhibited a negative correlation with AT, PEU, and ITU. The results further showed that ITU was positively correlated with income, age, and education. In addition, 95.86 % of the respondents were willing to pay for SUPS, mostly between 3 and 5 RMB (51.18 %). This study delineates a paradigm for elucidating the preference of using SUPS in the context of environmental sustainability and pro-environmental consumption. Such elucidation holds paramount importance in bolstering forthcoming investigations into SUPS utilization and behavioral patterns.

Determination of the occurrence of and exposure to bisphenol A and its analogues in carbonated beverages and canned tuna using liquid chromatography − tandem mass spectrometry

Bisphenol A (BPA), a known endocrine disruptor, is commonly used in food containers and packaging. Recently, alternatives such as bisphenol AF (BPAF), bisphenol B (BPB), and bisphenol E (BPE) have been introduced to replace BPA. However, these substitutes have been reported to exhibit toxicity levels similar to BPA. In this study, we developed and validated a method for the analysis of trace bisphenols (BPA, BPAF, BPB, and BPE) in food using immunoaffinity column (IAC) clean-up. The method demonstrated satisfactory accuracy and precision. We applied this validated method to analyze 56 carbonated beverage samples and 30 canned tuna samples. In the carbonated beverages, average concentrations of BPA and BPAF were 0.4 and 0.2 μg kg−1, respectively. In canned tuna, BPA and BPAF were found at average concentrations of 22.2 and 0.7 μg kg−1, respectively, while BPB and BPE were not detected in any samples. Estimated exposure levels ranged from 0.13 to 0.18 ng kg bw−1 day−1 in the general population and from 205.2 to 232.0 ng kg bw−1 day−1 among consumers. The commercial IAC-based analytical method used in this study can contribute to the safety management of BPA, BPAF, BPB, and BPE.

Bisphenol C Induces Cardiac Developmental Defects by Disrupting m6A Homeostasis.

Bisphenol A (BPA) is a commonly used plastic additive. Since BPA has been banned in maternal and infant food containers in many countries, BPA substitutes have been widely introduced to replace it. By systematically assessing the potential developmental toxicity of BPA substitutes, we observed that the 41-150 nM in vivo BPC exposure (around the reported concentration detected in infant urine: 6-186 nM) induced cardiac defects in zebrafish. Mechanistically, BPC disrupted m6A homeostasis by downregulation of the key m6A methyltransferase, Mettl3, thereby causing the m6A reader, Igf2bp2b, to fail in recognizing and stabilizing the inefficiently m6A-modified acox1 and tnnt2d mRNA. Then, downregulation of Acox1 (a regulator in cardiac fatty acid metabolism) and Tnnt2d (a component of cardiac troponin for muscle contraction) led to cardiac defects. Indeed, the dual cardiac functional axes regulated by the same m6A reader in response to BPC provided new insight into the regulatory mechanisms of epitranscriptomics and cardiac development. Collectively, our study not only presented evidence showing that the internal exposure levels of BPC in humans could lead to cardiac developmental defects but also demonstrated the underlying mechanism of BPC-mediated defects by disrupting the Mettl3-m6A-Igf2bp2b-Acox1/Tnnt2d pathways, which provided potential molecular markers associated with BPC exposure.

Comparative study of the structure and durability of commercial silicate glasses for food consumption and cosmetic packaging

Four commercial glass compositions were investigated to understand their mechanisms of alteration in light of the current and future regulations on food contact materials. Lead crystal (fine glassware), soda-lime (food and cosmetic containers), borosilicate (cookware) and barium glass (tableware) powders and slabs were altered for 3 years, in acetic acid (4% vol) at pH = 2.4 and 70 °C. The leaching solution was analyzed by ICP-AES while glass slabs were investigated by ToF-SIMS and Spectroscopic Ellipsometry. As a result, in acidic medium, the polymerization of the silicate network as well as the glass composition impacted the alteration rates and depleted depths of alkalis and earth-alkalis elements. Yet the rate of hydrolysis measured from the release of Si, remained similar under identical alteration conditions, whatever the glass structure and composition. For lead crystal glass, repolymerization of the silicate network was observed in the course of alteration.

Multiple-biomarker approach in the assessment of bisphenol A effect on the grooved carpet clam Ruditapes decussatus (Linnaeus, 1758)

BackgroundBisphenol A (BPA), a plastic additive monomer, is among the most highly produced chemicals worldwide, and is broadly used in many industries, such as food and beverage containers, milk bottles, and paper products. Previous studies demonstrated that BPA has potential toxicity to aquatic organisms, causing endocrine disturbance and behavioural disorders. The current work aimed to determine the toxic impacts of BPA on the edible marine clam Ruditapes decussatus considering a multi-biomarker approach (mortality, biochemical studies, DNA strand breaks using comet assay, and histopathological examinations with semi-quantitative and quantitative histopathological analyses). The clams were exposed under laboratory conditions to three concentrations of BPA (0 “control”, 1, and 5 µg/L) for a period of 21 days. After the exposure period, BPA impacts were assessed in the digestive gland as a versatile and environmentally relevant organ for ecotoxicological studies.ResultsIn BPA-treated clams, mortality (10%) occurred only at the highest BPA concentration (5 µg/L). Biochemical impairments were detected in a concentration-dependent manner as a consequence of BPA exposure. There were significant increases in malondialdehyde (MDA) and glutathione (GSH) levels, while catalase (CAT) activity was significantly reduced. Our results revealed that BPA induced neurotoxicity in R. decussatus, as evidenced by the inhibition of acetylcholinesterase (AChE) activity in a dose-dependent manner. Furthermore, DNA damage was strongly induced as BPA levels increased. Additionally, our results have been affirmed by alterations in digestive gland tissues at BPA treatments, which consequently can impair the clam’s ability for food absorption; these alterations included mainly atrophic and necrotic digestive tubules, epithelial cell vacuolization, hemocyte infiltration, and intertubular fibrosis. Based on the data obtained from the semi-quantitative and quantitative histopathological analyses, the exposure of the clam’s digestive gland to BPA with concentrations of 1 and 5 µg/L for 21 days showed significant histopathological alterations compared with the control clams.ConclusionThe multi-biomarker approach used in the current study proved to be a useful tool for assessing the impact of diphenylmethane compounds, such as BPA. Water-borne BPA causes oxidative stress, neurotoxicity, genotoxicity, and deleterious effects on the clam digestive gland; all of these could deteriorate clam performance and health, causing tissue dysfunction.

Influence of gamma-ray irradiation on polystyrene food container weathering

Conventional plastics, such as polystyrene (PS), are widely used due to their high degradation stability, which makes them suitable for various applications. However, the downside of this property is that it results in the persistence of these plastics in the environment, contributing to plastic pollution. This paper investigated the effects of gamma-ray irradiation on the mechanical, optical, structural, thermal, and morphological properties of PS food containers subjected to natural (NW) and artificial weathering (AW). First, the PS films were exposed to a source of 60Co-γ at doses of 0, 10, and 45 kGy, and then they were subjected to NW for 0–190 days and AW for 0–500 h. The mechanical properties of the PS films (tensile strength and elongation at break) were evaluated under NW and AW conditions, revealing an acceleration factor (AF) ranging from 3.8 to 6.2. According to the results, gamma-irradiation had a complex and uneven effect on the physicochemical properties of the weathered PS films. The type of weathering and conditions under which the exposures were performed, in conjunction with the irradiation doses, provided a comprehensive analysis of the effects of gamma-ray irradiation on PS food containers. These results are relevant for extending PS food containers' longevity rather than increasing their degradation.

Exposure to bisphenol A in European women from 2007 to 2014 using human biomonitoring data – The European Joint Programme HBM4EU

BackgroundBisphenol A (BPA; or 4,4′-isopropylidenediphenol) is an endocrine disrupting chemical. It was widely used in a variety of plastic-based manufactured products for several years. The European Food Safety Authority (EFSA) recently reduced the Tolerable Daily Intake (TDI) for BPA by 20,000 times due to concerns about immune-toxicity. ObjectiveWe used human biomonitoring (HBM) data to investigate the general level of BPA exposure from 2007 to 2014 of European women aged 18–73 years (n = 4,226) and its determinants. MethodsFifteen studies from 12 countries (Austria, Belgium, Denmark, France, Germany, Greece, Israel, Luxembourg, Slovenia, Spain, Sweden, and the United Kingdom) were included in the BPA Study protocol developed within the European Joint Programme HBM4EU. Seventy variables related to the BPA exposure were collected through a rigorous post-harmonization process. Linear mixed regression models were used to investigate the determinants of total urine BPA in the combined population. ResultsTotal BPA was quantified in 85–100 % of women in 14 out of 15 contributing studies. Only the Austrian PBAT study (Western Europe), which had a limit of quantification 2.5 to 25-fold higher than the other studies (LOQ=2.5 µg/L), found total BPA in less than 5 % of the urine samples analyzed. The geometric mean (GM) of total urine BPA ranged from 0.77 to 2.47 µg/L among the contributing studies. The lowest GM of total BPA was observed in France (Western Europe) from the ELFE subset (GM=0.77 µg/L (0.98 µg/g creatinine), n = 1741), and the highest levels were found in Belgium (Western Europe) and Greece (Southern Europe), from DEMOCOPHES (GM=2.47 µg/L (2.26 µg/g creatinine), n = 129) and HELIX-RHEA (GM=2.47 µg/L (2.44 µg/g creatinine), n = 194) subsets, respectively. One hundred percent of women in 14 out of 15 data collections in this study exceeded the health-based human biomonitoring guidance value for the general population (HBM-GVGenPop) of 0.0115 µg total BPA/L urine derived from the updated EFSA’s BPA TDI. Variables related to the measurement of total urine BPA and those related to the main socio-demographic characteristics (age, height, weight, education, smoking status) were collected in almost all studies, while several variables related to BPA exposure factors were not gathered in most of the original studies (consumption of beverages contained in plastic bottles, consumption of canned food or beverages, consumption of food in contact with plastic packaging, use of plastic film or plastic containers for food, having a plastic floor covering in the house, use of thermal paper…). No clear determinants of total urine BPA concentrations among European women were found. A broader range of data planned for collection in the original questionnaires of the contributing studies would have resulted in a more thorough investigation of the determinants of BPA exposure in European women. ConclusionThis study highlights the urgent need for action to further reduce exposure to BPA to protect the population, as is already the case in the European Union. The study also underscores the importance of pre-harmonizing HBM design and data for producing comparable data and interpretable results at a European-wide level, and to increase HBM uptake by regulatory agencies.

Study on university students’ intention to choose reusable takeaway food containers: evidence from China

Purpose Reusable takeaway food containers (RTFCs) are a newly emerging green packaging choice for the takeaway industry that can effectively reduce campus solid waste but are not yet well accepted. Therefore, this study aims to identify the key factors influencing university students’ intention to choose RTFCs, seeking to enhance RTFC project management practices and contribute to developing a sustainable “green university.” Design/methodology/approach In total, 316 valid respondents from a Chinese university were surveyed for data collection. A multivariate ordered logistic regression model was used to conduct empirical analysis. Findings The results of this study underscore the crucial role of perceived value in the relationship between perceived green attributes and students’ intention to choose RTFCs. The positive impacts of perceived green attributes on intention are direct and indirect, through the lens of perceived value. When the value is substantial, it significantly boosts the student’s intention to choose RTFCs. Conversely, the perception of lower hygienic quality or higher returning time cost dampens this intention, with a more pronounced effect than perceived green attributes. Notably, perceived publicity activities have the most significant impact on student’s intention to choose RTFCs. Originality/value This study contributes to the understanding of promoting RTFCs, a key strategy for reducing plastic waste on campuses. The findings provide actionable recommendations for the project company and the university, offering practical ways to encourage students to use RTFCs and contribute to plastic waste reduction.

It’s all your fault! restaurant vs. platform blame attribution in food delivery service failures

PurposeWhile third-party food delivery continues to increase in popularity, surveys suggest nearly a quarter of deliveries suffer from service failures. With the limited research on third-party food delivery, we explore the important questions of (1) where customers place blame in the case of service failures with third-party food delivery (i.e. the platform or the restaurant) and (2) does this depend on the type of service failure? Drawing on blame attribution theory, signaling theory, and an exploratory study, we demonstrate that customers typically perceive such mishaps to be the responsibility of the restaurant rather than the delivery platform itself. We also examine the effect of visible service failure preventative actions taken by the restaurant on blame attribution and re-order intention.Design/methodology/approachWe conducted two online scenario-based studies to explore customer blame attribution in the case of third-party food delivery service failure. First, an exploratory study approach (NStudy1 = 512) was taken to provide additional support for the hypothesis development. An experiment (NStudy2 = 252) was then conducted to examine the hypothesized effects.FindingsFirst, the results of an exploratory study demonstrate that customers attribute service failures such as wrong items, missing items, cold food, or leaking containers to restaurants over third-party food delivery platforms. Second, the results of an experimental study suggest inclusion of an observable cue indicating preventative action, such as time-stamp information indicating when an order was received and packaged for delivery, increases customer re-order intention through the underlying mechanism of blame attribution.Originality/valueWe contribute to the underexplored area of third-party food delivery service failure and to our understanding of blame attribution in service failure scenarios. Further, we demonstrate a practical method to shift the blame away from restaurants for service failures that are outside of the establishment’s control.

BIODEGRADABLE PACKAGING : A KEY TO ENVIRONMENTAL SUSTAINABILITY

Pollution is a global crisis that has been seen in current times from past few decades. Many kinds of pollution crisis are arising day by day, such as soil, air, water, noise and radioactive pollution. Soil, air and water pollution mainly cause by plastic. Plastic takes approximately 20 to 500 years to decompose. Several types of plastics take different time to decompose. Micro plastic is tiny particles of plastic which is broken down in small pieces or they are conventionally made like that. It is found in ocean which affects marine animals and plants and in food packaging which is toxic, harmful and hazardous to human beings. We have seen throughout the years that plastic bags, food container, fast food packages and plastic wrappers are just roaming around roads, grounds, land fields, lakes, ponds, rivers and oceans as well. We should opt for alternatives of conventional plastic packages, such as packaging made from plant-based materials, which can also decompose easily in the soil, that shows biodegradable properties. Many plants and materials used for plastic alternatives are discussed in this paper. Different materials and methodology required for making plant-based packaging are listed in the paper as well. Bio-degradable packaging is not only helpful and doing good to the environment, but also for humans as well, as we consume less micro plastics, and live a healthy life.

Mass Spectrometric Study of the Most Common Potential Migrants Extractible from the Inner Coatings of Metallic Beverage Cans.

Population exposure to endocrine disrupting chemical- bisphenols, which are used commonly in food containers and drinking water pipes in Europe, is above acceptable health and safety levels, according to updated research data. In order to evaluate the most abundant potential migrants in canned sweetened beverages marketed in Poland, we performed the HPLC-MS screening test of the migrants present in the can coating material. The analyzed samples represented the three top-ranked companies of the global soft drink market; it is reasonable to assume that the obtained data are of global validity. The tested can coatings and beverages contained bisphenols conjugates such as five butoxyethanol (BuOEtOH) adducts with bisphenol A diglycidyl ether (BADGE), one butoxyethanol adduct with bisphenol A monoglycidyl ether (BAMGE), and cyclo-di-BADGE. The performed HPLC-MS/MS analysis in the MRM mode enabled evaluation of the concentrations of the detected conjugates in canned beverages which were found to be very low, namely at the level of 1 µg/L. On the other hand, the high consumption of canned beverages may yield a risk associated with the presence of these compounds in the diet. The subsequent HPLC-QTOF-MS/MS experiments allowed, for the first time, a detailed determination of the fragmentation pathways of the detected migrants as well as detection of the isomers of the two migrants, namely BADGE + BuOEtOH and BADGE + BuOEtOH + HCl.

Baseline assessment of macrolitter on the coastline of Algeria: Fit-for-purpose data for tailor-made measures to navigate the Plasticene Age

Curbing the growing threat of marine litter requires reliable, coherent and fit-for-purpose data. The present study reports the findings of beach macrolitter surveys carried out in seventeen sites along the coastline of Algeria. The median litter density recorded along these sites amounted to 578 items per 100 m of coastline (range: 317–2684 items/100 m). Every surveyed beach exceeded the European threshold value of 20 items per 100 m of coastline by a significant margin. In addition, the evaluation conducted employing the Mediterranean threshold value of 130 items per 100 m of coastline indicated that each of the seventeen surveyed beaches resides within the non-Good Environmental Status spectrum. A significant proportion of the litter, accounting for 43 %, is attributed to food and beverage consumption-related items, highlighting the impact of single-use food packaging, including food and beverage containers resulting from unsustainable practices mainly by beach users and inadequate waste management.

Use of Drone Remote Sensing to Identify Increased Marine Macro-Litter Contamination following the Reopening of Salgar Beach (Colombian Caribbean) during Pandemic Restrictions

This study involves an integrated and innovative approach employing high-frequency monitoring, which is rare in studies focusing on solid waste on beaches. Eight drone flights were performed over a tourist beach in the Colombian Caribbean to achieve two main objectives: (i) to quantify the changes in marine macro-litter (>2.5 cm) density, focusing on the differences between the period when the beach was closed due to the COVID-19 pandemic and the subsequent reopening period; and (ii) to map changes in the abundance of marine macro-litter on the coast, with an emphasis on single-use waste. The number of items of litter on the beach increased 9-fold between the closed and reopening periods, and the main items found were crisp/sweet packets (n = 304, 13% of the total waste), plastic cups (n = 248, 11%), and expanded polystyrene (food containers) (n = 227, 10%). The factors contributing to the presence and distribution of the marine macro-litter were tourists, the use of the beach, and offshore wind direction. The results revealed that Salgar Beach can be considered a marine macro-litter exporter since waste is incorporated into the longshore current and redistributed either to nearby beaches or the ocean. This study emphasizes the potential for using drone images in an integrated approach to monitoring the presence of marine macro-litter as well as the efficiency of programs for combatting litter at sea.