摘要

微塑料和有机污染物是海洋环境中的典型污染物。然而，人们对他们的互动知之甚少。在这项研究中，研究了聚丙烯微塑料在模拟海水中吸附3,6-二溴咔唑（3,6-BCZ）和1,3,6,8-四溴咔唑（1,3,6,8-BCZ）。研究了粒径，盐度和浓度等因素，并使用数学模型模拟了实验结果。结果表明，拟二级动力学模型更适合描述微塑料对多卤代咔唑的吸附，3,6-BCZ和1,3,6,8-BCZ的平衡吸附时间分别为6h和8h。 ， 分别。随着粒径的减小，吸附容量增加，吸附容量随着盐度的增加先增大后减小，在盐度为14％时最大吸附量。此外，吸附量随着多卤代咔唑浓度的增加而增加。吸附等温线被确认为扩展的Langmuir模型和扩展的Freundlich模型，两者都是S型。

Microplastics and organic pollutants are typical contaminants in the marine environment. However, little is known about their interactions. In this study, the sorption of 3,6-Dibromocarbazole(3,6-BCZ) and 1,3,6,8-Tetrabromocarbazole (1,3,6,8-BCZ) by Polypropylene microplastic in simulated seawater was studied. Factors, including particle size, salinity and concentration, were investigated, and the experimental results were simulated using a mathematical model. Results showed that the pseudo-second-order kinetic model was more suitable to describe the sorption of polyhalogenated carbazole by microplastics, with equilibrium sorption times of 6 h and 8 h for 3,6-BCZ and 1,3,6,8-BCZ, respectively. Sorption capacity increased with decreasing particle size and the adsorption capacity increased initially and then decreased with increasing salinity, with a maximum sorption occurring at salinity of 14%. Moreover, the sorption amount increased with the increasing concentration of polyhalogenated carbazole. The sorption isotherms were confirmed as the extended Langmuir model and the extended Freundlich model, both of which were S-type.

https://www.ncbi.nlm.nih.gov/pubmed/30660295