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^-1) and difenoconazole (192.8 ± 2.3 μg g^-1), 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.

近年来，微塑料吸引了很多关注，因为它们能够与其他污染物（包括农药）相互作用，从而对生物群的潜在风险产生了影响。然而，对农药在微塑料上，特别是在可生物降解的微塑料上的吸附行为的研究尚未得到充分研究，这是常规聚合物的有希望的替代品。在这项研究中，选择了triadimefon和difenoconazole作为模型三唑杀菌剂，并通过分批实验研究了它们在典型的可生物降解的微塑料（PBS：聚丁二酸琥珀酸酯）以及两种常规的聚乙烯（PE）和聚氯乙烯（PVC）上的吸附行为。水溶液。PBS对三唑酮的吸附容量最高（104.2±4.8μgg ^-1）和二苯那康唑（192.8±2.3μgg ^-1），分别是PE的1.8倍和1.3倍，PVC的4.4倍和7.4倍。吸附动力学和等温线建模的结果分别通过伪二级模型和线性模型更好地拟合。更重要的是，研究了环境因素（pH，盐度和溶解的有机物）对吸附行为的影响。杀菌剂在PBS上的吸附通常不受盐度，pH或溶解有机物的影响。然而，相反，盐度和溶解的有机物均显着降低了对PE和PVC的吸附。结果表明，不仅可生物降解的微塑料的吸附能力，而且其对环境因素的响应都与常规微塑料完全不同。