南京城市污水处理厂中微塑料的赋存特征

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摘要以南京市某污水处理厂及下游入江口作为研究对象，对其中微塑料的赋存特征进行研究.结果表明，污水处理厂进水中微塑料以尼龙材质为主（71.43%），颜色以黑色为主（54.76%），形状以纤维状为主（38.10%），尺寸以50~500μm为主（69.05%），丰度为4.2n/L（个/L），二级处理后污水中微塑料丰度为1.6n/L，出水微塑料丰度为0.9n/L，污水处理厂处理工艺对微塑料的去除效率为78.57%.入江口处污染负荷指数为50.99，处于较低水平，由于污水处理厂出水持续排入，微塑料造成的生态风险仍不可忽视.本文研究结果为改进污水处理厂中微塑料去除工艺设计提供了基础数据.

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	陈瑀
	张宴
	苏良湖
	赵欣
	卜元卿
	李辉
	张圣虎
	李江

关键词 ：微塑料, 污水处理厂, 赋存特征, 去除效率

Abstract：The occurrence characteristic of microplastics in one wastewater treatment plant and its downstream inlet in Nanjing was investigated in this study. The results showed that the microplastics in the influent water had the following characteristics: 71.43% was made of nylon, the dominant color was the black (54.76%), fibres accounted for 38.10%, and the particle size was mainly in the range of 50~500μm (69.05%). The abundance of microplastics in influent water, secondary treated sewage and effluent water of wastewater treatment plant were 4.2n/L, 1.6n/L and 0.9n/L, respectively. The removal efficiency of microplastics in this treatment plant was 78.57%. Despite the low pollution load index (50.99) at the river entrance, the potential ecological risks caused by microplastics released from the waste water treatment plant could not be ignored due to the continuous discharge of effluent. The results could provide reference data for the improvement of design on microplastic removal processes in wastewater treatment plants.

Key words： microplastics wastewater treatment plants occurrence characteristic removal rate

收稿日期: 2020-02-16

PACS:

X703

基金资助:国家重点研发计划（2017YFD0800705）；中央级公益性科研院所基本科研业务专项（GYZX190203）

通讯作者: 张圣虎,副研究员,zsh@nies.org;李江,教授,jli82@gzu.edu.cn E-mail: zsh@nies.org;jli82@gzu.edu.cn

作者简介: 陈瑀(1996-),男,安徽蚌埠人,贵州大学硕士研究生,主要从事污水处理厂中新型污染物的检测分析研究.

引用本文:

陈瑀, 张宴, 苏良湖, 赵欣, 卜元卿, 李辉, 张圣虎, 李江. 南京城市污水处理厂中微塑料的赋存特征[J]. 中国环境科学, 2020, 40(9): 3835-3841. CHEN Yu, ZHANG Yan, SU Liang-hu, ZHAO Xin, BU Yuan-qin, LI Hui, ZHANG Sheng-hu, LI Jiang. Occurrence characteristics of microplastics in Nanjing urban wastewater treatment plant. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(9): 3835-3841.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2020/V40/I9/3835

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