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Strong sorption of two fungicides onto biodegradable microplastics with emphasis on the negligible role of environmental factors

Environmental Pollution 2020 97 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Mengyun Jiang, Tingting Zhang, Li Xu, Wenwen Gong Wenwen Gong Li Xu, Wenwen Gong Wenwen Gong Wenwen Gong Li Xu, Mengyun Jiang, Liyang Hu, Liyang Hu, Zuhong Lin, Liyang Hu, Tingting Zhang, Tingting Zhang, Zuhong Lin, Wenwen Gong Li Xu, Wenwen Gong Tingting Zhang, Li Xu, Li Xu, Li Xu, Li Xu, Tingting Zhang, Zuhong Lin, Zuhong Lin, Anxiang Lu, Mengyun Jiang, Mengyun Jiang, Zuhong Lin, Zuhong Lin, Liyang Hu, Tingting Zhang, Li Xu, Tingting Zhang, Li Xu, Li Xu, Gang Liang, Gang Liang, Li Xu, Tingting Zhang, Anxiang Lu, Anxiang Lu, Anxiang Lu, Tingting Zhang, Li Xu, Mengyun Jiang, Li Xu, Li Xu, Li Xu, Wenwen Gong Tingting Zhang, Tingting Zhang, Li Xu, Tingting Zhang, Tingting Zhang, Li Xu, Wenwen Gong Li Xu, Zuhong Lin, Gang Liang, Zuhong Lin, Li Xu, Li Xu, Li Xu, Li Xu, Li Xu, Tingting Zhang, Gang Liang, Li Xu, Li Xu, Tingting Zhang, Wenwen Gong Li Xu, Li Xu, Li Xu, Tingting Zhang, Li Xu, Wenwen Gong Tingting Zhang, Li Xu, Li Xu, Li Xu, Bingru Li, Li Xu, Li Xu, Li Xu, Li Xu, Wenwen Gong Tingting Zhang, Tingting Zhang, Li Xu, Li Xu, Wenwen Gong Wenwen Gong Li Xu, Wenwen Gong

Summary

Researchers found strong sorption of two fungicides onto biodegradable microplastics, with partition coefficients largely unaffected by environmental variables such as pH, ionic strength, and temperature, suggesting that biodegradable plastic alternatives may still facilitate pesticide transport in agricultural and aquatic environments.

Polymers

PE PVC

Microplastics have attracted much attention in recent years because they are able to interact with other pollutants including pesticides, with implications for the potential risks to biota. However, the sorption behavior of pesticides on microplastics, especially on biodegradable microplastics which are promising alternatives to conventional polymers, has been insufficiently studied. In this study, triadimefon and difenoconazole were selected as model triazole fungicides, and their sorption behavior on a typical biodegradable microplastics (PBS: polybutylene succinate) and two conventional polyethylene (PE) and polyvinyl chloride (PVC) microplastics was investigated with batch experiments in an aqueous solution. PBS presented the highest sorption capacity for triadimefon (104.2 ± 4.8 μg g) and difenoconazole (192.8 ± 2.3 μg g), which was 1.8- and 1.3-fold that on PE and 4.4- and 7.4-fold that of PVC, respectively. The results of sorption kinetic and isotherm modeling were better fit by a pseudo-second order model and linear model, respectively. More importantly, the effects of environmental factors (pH, salinity and dissolved organic matter) on the sorption behavior were investigated. Fungicide sorption on PBS was generally not affected by salinity, pH or dissolved organic matter. However, in contrast, salinity and dissolved organic matter both significantly decreased sorption on PE and PVC. The results showed that not only the sorption capacities of biodegradable microplastics but also their responses to environmental factors are quite different from those of conventional microplastics. This finding highlights the importance of the role played by biodegradable microplastics in the accumulation and transportation of organic pollutants.

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