| 摘要: |
| 针对饮用水水源的微塑料污染问题，采用超滤-纳滤双膜法处理微塑料-有机物复合污染物，系统考察了不同水质条件下的净水效能。结果表明，双膜系统的超滤段可完全去除粒径为2 μm的聚苯乙烯塑料微球，为纳滤段提供稳定的进水条件，系统的出水水质良好。微塑料与有机物之间的相互作用，有利于超滤段去除有机污染物，从而减缓纳滤膜污染。离子强度的增加会降低超滤段对有机物的去除效果，钙离子（Ca2+）和镁离子（Mg2+）与有机物的络合作用会显著增加双膜系统的膜污染，pH值的升高可提高双膜系统的净水效果。双膜系统可为微塑料-有机物复合污染物去除体系的优化提供参考。 |
| 关键词: 超滤-纳滤双膜法 微塑料 有机污染物 饮用水 |
| DOI： |
| 分类号:X52 |
| 基金项目:广东省重点领域研发计划项目（2020B0101130001）；江苏省社会发展类重大科技示范项目（BE2020686）；江苏省水利科技项目（2020060） |
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| Reach on Removal Characteristics of Microplastic Organic Compound Pollution via Dual membrane Process |
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ZHU Donglin， LI Guoguang， LUO Chunyan， YAN Xu， HU Lineng
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1. College of Environment， Nanjing University， Nanjing，Jiangsu 210046， China;2. Nanjing Nine Star Smartthink Technology Co， Ltd， Nanjing， Jiangsu 210036， China
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| Abstract: |
| An ultrafiltration (UF) nanofiltration (NF) dual membrane process was applied to treat microplastic (MP) organic compound pollution， aiming at the MP pollution in drinking water source. The purification efficiency of dual membrane system under different influent conditions was systematically studied. The results showed that the UF stage of the system could completely remove 2μm sized polystyrene plastic microspheres， thus providing stable feed condition for NF stage. The effluent quality of the system achieved the expected results. The interaction between MPs and organic matter could promote organic removal in UF stage， which could mitigate NF membrane fouling. The increase of ionic strength could reduce the organic removal rate in UF process. The complexation of Ca2+ and Mg2+ with organic matter could significantly increase the membrane fouling degree. The increase of pH value could improve the purification effect of the dual membrane system. The results can provide a reference for the optimization of operation and maintenance system of dual membrane process. |
| Key words: UF NF dual membrane process Microplastics Organic pollutants Drinking water |
