Occurrence and distribution of microplastics in domestic, industrial, agricultural and aquacultural wastewater sources: A case study in Changzhou, China
Occurrence and distribution of microplastics in domestic, industrial, agricultural and aquacultural wastewater sources: A case study in Changzhou, China
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DOI：
10.1016/j.watres.2020.115956
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发表时间：
2020-09-01
期刊：
影响因子：
12.8
通讯作者：
Yu, Gang
中科院分区：
文献类型：
--
作者：
Wang, Fang;Wang, Bin;Yu, Gang
塑料在人类生活中的广泛应用带来了微塑料对环境的污染。确定MPS的潜在来源对于减少其污染是必要的。对中国市区9个生活污水处理厂、5个工业污水处理厂、10个工业废水处理厂、4个畜牧场和4个鱼塘的进水和出水中多酚类物质的存在、组成和分布进行了调查。水样用酶处理，然后用过氧化氢消化和密度分离。利用显微拉曼光谱对MPS进行了表征，并根据形状、大小和颜色进行了分类。结果表明，生活污水处理厂进水MP丰度为18~890 n.L-1，出水MP为6~26n.L-1，去除效率为35%~98%。工业污水处理厂的出水浓度为6~12n.L-1，工业工厂、畜牧场和鱼塘的出水中MPS的浓度分别为8-23、8-40和13-27n.L-1。不同来源的出水或废水的MP丰度没有显著差异，表明它们都是MP的污染源。聚乙烯(PE)、聚丙烯(PP)和聚苯乙烯(PS)几乎占总MPS的83%。碎片和薄膜是最丰富的形状，大多数MPS小于500um。不同来源的聚合物类型和形状没有统计学差异，但不同来源的MPS的大小和颜色略有差异。这项研究可以填补不同来源的MP数据空白，指导未来的监测工作和政策制定。(C)2020爱思唯尔有限公司。保留所有权利。
The extensive application of plastic in human life brings about microplastic (MP) pollution in the environment. Identifying the potential sources of MPs is necessary to diminish its pollution. In this study, the occurrence, composition and distribution of MPs in the influents and effluents from 9 domestic wastewater treatment plants (WWTPs), 5 industrial WWTPs, wastewater of 10 industrial plants, 4 livestock farms and 4 fish ponds in China were investigated. Water samples were enzymatically treated followed by digestion with hydrogen peroxide and density separation. MPs were characterized using micro-Raman spectroscopy and were categorized by shape, size and color. Results showed that MP abundance in the influents and effluents of domestic WWTPs was 18-890 and 6-26 n.L-1, respectively, with the removal efficiency ranging from 35 to 98%. The effluents of industrial WWTPs contained 6-12 n.L-1 and the levels of MPs in the wastewater of industrial plants, livestock farms and fish ponds were in the range of 8-23, 8-40 and 13-27 n.L-1, respectively. No significant differences of MP abundance were demonstrated among effluents or wastewater of different sources, indicating they all constitute sources of MP pollution. Polyethylene (PE), polypropylene (PP) and polystyrene (PS) made up almost 83% of the total MPs. Fragment and film were the most abundant shapes and the majority of MPs were smaller than 500 um. Polymer type and shape in different sources did not vary statistically, however, there were slight differences among different sources concerning size and color of MPs. This study could fill MP data gaps regarding different sources, guide future monitoring work and policy making. (C) 2020 Elsevier Ltd. All rights reserved.