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  • 张晨牧,刘景洋,戴景富.络合-陶瓷膜耦合技术资源化处理模拟低浓度含铜废水[J].环境工程学报,2019,13(7):1565-1572.DOI:10.12030/j.cjee.201810114    [点击复制]
  • ZHANG Chenmu,LIU Jingyang,DAI Jingfu.Resourceful treatment of artificial wastewater containing low concentration copper by complexation-ceramic membrane coupling process[J].,2019,13(7):1565-1572.DOI:10.12030/j.cjee.201810114   [点击复制]
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络合-陶瓷膜耦合技术资源化处理模拟低浓度含铜废水
张晨牧1,2,刘景洋1,戴景富3
0
(1.中国环境科学研究院,国家环境保护生态工业重点实验室,北京 100012;2.中交水运规划设计院有限公司,北京 100007;3.中国石油天然气股份有限公司吉林石化分公司,吉林 132022)
摘要:
以聚丙烯酸(PAA)和壳聚糖(CTS)作为络合剂,耦合孔径200 nm的陶瓷膜处理模拟低浓度含铜废水,采用ICP-MS、TOC、SEM表征与Darcy膜污染模型对处理效果和膜污染情况进行表征;对比研究不同络合剂对Cu2+截留效果与资源化回用效率的影响;并探讨对应的膜污染机理。结果表明:溶液pH通过影响聚合物络合活性位点对Cu2+截留率起决定性作用;在pH=6、P/M≥5或C/M=10的优化条件下,Cu2+截留率接近100%;PAA相对于CTS对Cu2+的络合效率更高,而CTS具备更好的抗杂质离子干扰能力;酸解、循环回用的PAA与CTS对Cu2+截留率稳定在99%以上。膜污染阻力分布计算和SEM、EDX微观表征表明,滤饼污染为膜污染主要形式,CTS更易造成不可逆的膜孔堵塞污染。
关键词:  陶瓷膜  含铜废水  离子强度  膜污染
DOI:10.12030/j.cjee.201810114
投稿时间:2018-10-19
基金项目:国家水体污染控制与治理科技重大专项2017ZX07402-002国家水体污染控制与治理科技重大专项(2017ZX07402-002)
Resourceful treatment of artificial wastewater containing low concentration copper by complexation-ceramic membrane coupling process
ZHANG Chenmu1,2,LIU Jingyang1,DAI Jingfu3
(1.Key Laboratory of Eco-Industry of the Ministry of Environmental Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;2.China Communications Construction Water Transportation Consultants Co. Ltd., Beijing 100007, China;3.Jilin Petrochemical Branch of PetroChina Co. Ltd., Jilin 132022, China)
Abstract:
In this study, polyacrylic acid (PAA) and chitosan (CTS) were taken as the complexing agents to couple the ceramic membrane with a pore size of 200 nm for treating a type of wastewater containing low-concentration copper. The treatment effect and membrane fouling were characterized by ICP-MS, TOC, SEM and Darcy membrane fouling model. And the effects of different complexing agents on Cu2+ rejection and recycling were investigated in detail, as well as the membrane fouling mechanism. Results indicated that solution pH played a decisive role in the Cu2+ rejection by affecting the complexing active sites of the polymers. Under the optimum conditions of pH=6, P/M≥5 or C/M=10, the Cu2+ rejection rate could approach 100%. Compared with CTS, PAA presented a higher complexing efficiency for Cu2+, while CTS showed a better anti-interference ability against impurity ions. The recycled PAA/CTS through acid hydrolysis still maintained above 99% Cu2+ rejection. Combined the membrane pollution resistance distribution calculation with SEM and EDX, the cake layer clogging was identified as the primary membrane fouling, and CTS was more likely to cause the irreversible blockage of membrane pores.
Key words:  ceramic membrane  wastewater containing copper  ionic strength  membrane pollution