阳离子交换树脂负载纳米零价铜去除水中Cr(Ⅵ)影响因素研究  

Influence Factors in Removal of Aqueous Cr(Ⅵ) by Nano Zero Valent Copper-Resin Research

作　　者：刘秀峰 叶少佐 

机构地区：[1]温州市环境监测中心站,浙江温州325000

出　　处：《中国资源综合利用》2017年第12期24-27,32,共5页China Resources Comprehensive Utilization

摘　　要：本文通过制备阳离子交换树脂负载纳米零价铜并对其进行表面分析,利用阳离子交换树脂作为纳米零价铜的分散剂将Cr(Ⅵ)还原成Cr(Ⅲ),探讨了不同比例的阳离子交换树脂与纳米零价铜以及溶液pH值、反应温度对去除溶液中Cr(Ⅵ)的影响。试验结果显示,不同比例的阳离子交换树脂与纳米零价铜具有不同的比表面积,因此其还原Cr(Ⅵ)的能力也不同。25 mg/g为去除溶液中Cr(Ⅵ)最佳比例;经反应24 h后,溶液中Cr(Ⅵ)去除率可以达95%,且铜离子残留浓度为最低;与pH值为5.0或7.0时相比,pH值为3.0时的去除率最佳,控制溶液温度在18℃~36℃,Cr(Ⅵ)去除率可达90%。Nanoscale zero valent copper supported on cation exchange resin（nano copper-resin） had been fabricated and analyzed its surface. Using cation exchange resin as the agent of dispersion could reduce Cr（Ⅵ） to Cr（ Ⅲ）. Nanoscale copper-resin with different copper/resin ratios, p H value and temperature on reduction of Cr（Ⅵ） were investigated and discussed. The results showed that different copper/resin ratios had different specific area and ability to reduce Cr（Ⅵ）. 25 mg/g is the best proportion of Cr（Ⅵ） in the solution; after reaction of 24 h, the removal rate of Cr（Ⅵ） can reach 95%, and the residual concentration of copper ions is the lowest. The removal efficiency when p H was at 3 was better than when p H was at 5 and 7. The removal efficiency was around 90% when controling temperature range was at 18~36℃.

关 键 词：六价铬 纳米零价金属 离子交换树脂 影响因素 

分 类 号：O647.3[理学—物理化学]