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Interaction behavior, mechanisms and hazardous changes of microplastics on single and binary component pesticide in the environment and food: Diethofencarb and pyrimethanil

Journal of Hazardous Materials 2024 16 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 60 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Qingrun Liu, Qingrun Liu, Qingrun Liu, Qingrun Liu, Yulun Chen, Qingrun Liu, Yulun Chen, Qingrun Liu, Qingrun Liu, Qingrun Liu, Qingrun Liu, Yulun Chen, Qingrun Liu, Qingrun Liu, Qingrun Liu, Dajun Wu, Qingrun Liu, Dajun Wu, Dajun Wu, Jinchi Han, Yulun Chen, Zixuan Zhang, Yulun Chen, Qingrun Liu, Qingrun Liu, Qingrun Liu, Dajun Wu, Dajun Wu, Xiao Wang, Yulun Chen, Yue Pan, Yulun Chen, Jinchi Han, Xiao Wang, Weirong Yao, Yulun Chen, Yue Pan, Weirong Yao, Shaofeng Yuan, Xiao Wang, Yao Shen, Zixuan Zhang, Hang Yu Yulun Chen, Yao Shen, Shaofeng Yuan, Weirong Yao, Xiao Wang, Hang Yu Xiao Wang, Xiao Wang, Hang Yu Hang Yu Fukang Xiong, Hang Yu Zhe Chen, Weirong Yao, Weirong Yao, Weirong Yao, Fukang Xiong, Weirong Yao, Jinchi Han, Shaofeng Yuan, Zixuan Zhang, Shaofeng Yuan, Zixuan Zhang, Weirong Yao, Hang Yu Zixuan Zhang, Zixuan Zhang, Yue Pan, Yulun Chen, Yue Pan, Zhe Chen, Yulun Chen, Zhe Chen, Yao Shen, Shaofeng Yuan, Shaofeng Yuan, Zhe Chen, Zhe Chen, Hang Yu Weirong Yao, Yulun Chen, Qingrun Liu, Shaofeng Yuan, Hang Yu

Summary

Researchers studied how four types of microplastics absorb two common pesticides and found that the plastics acted as carriers that increased the pesticides' bioavailability during simulated human digestion. The adsorption was faster when both pesticides were present together, and more water-repellent pesticides bound more readily to the plastics. This is concerning because it means microplastics in food could deliver higher doses of pesticide residues into the body than the pesticides would on their own.

Study Type In vitro

In order to investigate the adsorption behavior and mechanism of microplastics (MPs) on multiple coexisting pesticides in practical systems, as well as their hazardous changes upon binding, diethofencarb and pyrimethanil were selected to be studied with four MPs. The adsorption rate of both pesticides would be faster in the binary-component case, conforming to pseudo-second-order kinetics, with adsorption sites and chemical adsorption dominating. And the more hydrophobic the pesticide, the faster the adsorption rate and the higher the adsorption capacity. Diethofencarb belonged to monolayer adsorption, whereas pyrimethanil belonged to monomolecular combined with multilayer adsorption, depending on the size of pesticides. And the adsorption process was both competitive and synergistic when pesticides coexist. In addition, the adsorption process was a spontaneous heat absorption process. Electrostatic forces have little effect on adsorption, while the adsorption capacity can be altered by the adsorption sites and hydrophobicity of MPs. The salting-out effect also facilitated the adsorption process. As for changes in hazard, the bioluminescence of A. fischeri wasn't significantly inhibited, lacking of acute environmental toxicity. However, in vitro digestion experiments demonstrated a significant increase in bioavailability of diethofencarb and pyrimethanil in combination with MPs. These findings suggest the stronger adsorption behaviors and higher loading capacities between pesticides and MPs could lead more serious hazards to the human body, which deserves further attention.

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