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Leaching of di-2-ethylhexyl phthalate from biodegradable and conventional microplastics and the potential risks

Chemosphere 2022 45 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Xianliang Yi, Xiaocong Zhong, Huiyan Tong, Huiyan Tong, Huiyan Tong, Xianliang Yi, Xiaocong Zhong, Huiyan Tong, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xiaocong Zhong, Xianliang Yi, Xianliang Yi, Xiaocong Zhong, Xiaocong Zhong, Xiaocong Zhong, Xiaojing Yang Fanqi Cheng, Xiaocong Zhong, Xiaocong Zhong, Fanqi Cheng, Huiyan Tong, Xianliang Yi, Huiyan Tong, Xiaojing Yang Xianliang Yi, Xiaocong Zhong, Xiaocong Zhong, Xiaojing Yang Weiping Xu, Fanqi Cheng, Fanqi Cheng, Xianliang Yi, Weiping Xu, Xianliang Yi, Xiaojing Yang Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xiaojing Yang Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xiaojing Yang

Summary

Researchers compared the leaching of the plasticizer DEHP from biodegradable and conventional microplastics into seawater. They found that conventional polyethylene mulch film released the most DEHP, at about six times the amount leached from biodegradable alternatives. The study suggests that while all tested microplastics released some DEHP, the pollution risk from the leached amounts was assessed as low based on phthalate pollution indices.

Polymers

PE PLA

Models

Human

Study Type Environmental

There has been a growing concern about plastic pollution, both from a health and ecological perspective. One of the major concerns with plastic debris, especially microplastics (MPs) relates to their strong potential for releasing additives and chemicals. Di-2-ethylhexyl phthalate (DEHP) is a common plastic additive widely used as plasticizer in plastic products, and is of global concern due to its widespread contamination in the environment. In this study, two conventional nondegradable plastics (polyethylene (PE) bags and PE mulch) and two biodegradable plastics (poly(butylene adipate co-terephtalate)-starch-based-polylactic acid bags (PBAT/PLA bags) and PLA mulch) were selected to investigate the release of DEHP to seawater. The results showed that leaching potentials of DEHP from different types of MPs varied. Among the four selected MPs, PE mulch had the highest leaching potential (6.88 μg/g), followed by PE bags (4.24 μg/g), PLA mulch (1.10 μg/g) and PBAT/PLA bags (0.89 μg/g). The DEHP leaching kinetic curves of the four MPs were all in line with the pseudo first order model. The potential risk of environmental and human exposure to the leached DEHP was assessed using the average Phthalate Pollution Index (PPI). The calculated PPI indicated low pollution risks of DEHP released by the four MPs in seawater.

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