污水处理厂中微塑料分离提取方法探究  

Study on Separation and Extraction Method of Microplastics in Sewage Treatment Plant

作　　者：刘旭光 翟世娇 齐杰 Liu Xuguang;Zhai Shijiao;Qi Jie(Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学,河北邯郸056038

出　　处：《广东化工》2024年第19期151-154,共4页Guangdong Chemical Industry

摘　　要：粒径小于5 mm的塑料颗粒或纤维,被称为微塑料Microplastics(MPs)。而作为MPs的“源”和“汇”,污水处理厂被确定是陆源MPs进入自然水体环境前的关键环节。对污水处理厂中微塑料样品进行分离提取,是后续微塑料赋存及去除研究的关键步骤。本研究采用3种消解剂(30%H_(2)O_(2)、芬顿试剂和Na OH)结合ZnCl_(2)浮选剂,对污水和污泥中的4种类型、4种粒径的微塑料进行分离提取。结果表明:对于污水厂水样,宜采用30%H_(2)O_(2)消解结合ZnCl_(2)浮选,对于脱水污泥样品宜采用后消解处理法,Zn Cl_(2)浮选后进行30%H_(2)O_(2)消解。拉曼光谱表明:PET的拉曼光谱特征峰变化最为显著,但不影响其类型的鉴别。Plastic particles or fibers with a particle size smaller than 5 mm are called microplastic Microplastics(MPs).As the“source”and“sink”of MPs,sewage treatment plant is determined to be the key link before land-based MPs enters the Natural water environment.The separation and extraction of microplastic samples from sewage treatment plant is a key step in the follow-up study of microplastic occurrence and removal.In this study,three kinds of digestion agents(30%H_(2)O_(2),Fenton reagent and NaOH)combined with ZnCl_(2) flotation agent were used to separate and extract 4 types and 4 kinds of microplastics in sewage and sludge.The results show that 30%H_(2)O_(2) digestion combined with ZnCl_(2) flotation is suitable for wastewater treatment plant water samples,post-digestion method is suitable for dewatered sludge samples,and 30%H_(2)O_(2) digestion is carried out after ZnCl_(2) flotation.Raman spectra showed that the characteristic peaks of PET changed most significantly,but it did not affect the identification of its types.

关 键 词：污水处理厂 微塑料 回收率 分离提取 显微拉曼光谱 

分 类 号：X830.2[环境科学与工程—环境工程]