Qingdao Engineering Research Center for Rural Environment, Qingdao Agricultural University, Qingdao 266109, China.
College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China.
Mar Pollut Bull. 2019 Aug;145:260-269. doi: 10.1016/j.marpolbul.2019.05.050. Epub 2019 Jun 3.
The sorption of polybrominated diphenyl ethers (PBDEs) onto polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyamide (PA) microplastics was analyzed using different kinetic and isotherm models, and under various environmental conditions, including temperature, pH, salinity and dissolved organic matter (DOM). The sorption capacity was in the order of PS > PA > PP > PE, due to the different crystallinity, specific surface area, and surface structure. PS demonstrated the equilibrium sorption capacity, namely, 6.41 ng/g BDE-47, 12.83 ng/g BDE-99, and 14.42 ng/g BDE-153. The second-order kinetic model described the sorption kinetics of PBDEs, and surface sorption was the main mechanism. The sorption of PBDEs by microplastics was a multilayer and physical process. Low temperatures reduced BDE-47 sorption on microplastics, and sorption was a spontaneous and endothermic process. The sorption of BDE-47 was not significantly influenced by pH and salinity. However, DOM exerted a negative effect on the sorption of BDE-47.
多溴二苯醚（PBDEs）在聚乙烯（PE）、聚丙烯（PP）、聚苯乙烯（PS）和聚酰胺（PA）微塑料上的吸附作用，采用不同的动力学和等温线模型进行了分析，并在不同的环境条件下，包括温度、pH 值、盐度和溶解有机物（DOM）下进行了分析。由于结晶度、比表面积和表面结构的不同，吸附能力的顺序为 PS＞PA＞PP＞PE。PS 表现出平衡吸附能力，即 BDE-47 的 6.41ng/g、BDE-99 的 12.83ng/g 和 BDE-153 的 14.42ng/g。PBDEs 的吸附动力学由二级动力学模型描述，表面吸附是主要的机制。PBDEs 被微塑料吸附是一个多层和物理过程。低温降低了 BDE-47 在微塑料上的吸附，吸附是一个自发和吸热的过程。pH 值和盐度对 BDE-47 的吸附没有显著影响。然而，DOM 对 BDE-47 的吸附有负面影响。
