Xia Yanrong, Niu Siping, Wang Tiantian, Wu Jing
Department of Environmental Science and Engineering, School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, People's Republic of China.
Department of Environmental Science and Engineering, School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, People's Republic of China.
Mar Pollut Bull. 2023 Feb;187:114588. doi: 10.1016/j.marpolbul.2023.114588. Epub 2023 Jan 16.
The adsorption of microplastics (MPs) for metals in aquatic environment remains poorly understood due to the use of either commercial MPs, which have different property from the MPs in environments, or artificial solutions, which have not only the significantly higher concentration of metals than natural aqueous environment but also the different natures. In this study, we elaborated the adsorption throughout the aging process of plastic bag derived-MPs (initially 1-2 mm) by potassium persulfate (KSO) solution to metals in lake water. Comparatively, plastic bag derived-MPs had the highest adsorption capacity for Zn followed by Fe, Pb, Mn, Cr, Ni, Cu and Cd, which is not completely consistent with the literature. Both the adsorption capacity and distribution coefficients of Cu, Ni, Zn, Mn and Pb had significant linear correlation with carbonyl index (p < 0.05). Although the aging overall enhanced the adsorption, the adsorption capacities of MPs might fluctuate depending on metal.
由于使用的要么是与环境中的微塑料性质不同的商业微塑料，要么是不仅金属浓度比天然水环境高得多且性质也不同的人工溶液，水生环境中微塑料（MPs）对金属的吸附仍知之甚少。在本研究中，我们阐述了通过过硫酸钾（KSO）溶液对湖水金属的吸附过程中，塑料袋衍生的微塑料（初始尺寸为1 - 2毫米）在整个老化过程中的吸附情况。相比之下，塑料袋衍生的微塑料对锌的吸附能力最高，其次是铁、铅、锰、铬、镍、铜和镉，这与文献并不完全一致。铜、镍、锌、锰和铅的吸附容量和分配系数均与羰基指数呈显著线性相关（p < 0.05）。尽管老化总体上增强了吸附，但微塑料的吸附容量可能会因金属而异。
