不溶性淀粉黄原酸酯处理Cr(Ⅵ)废水的研究  

Experimental Research on Treatment of Wastewater Containing Cr(Ⅵ) with Insoluble Starch Xanthate

作　　者：严鹤峰[1] 李琛[2] 

机构地区：[1]陕西工商职业学院,陕西西安710119 [2]陕西理工学院化学与环境学院,陕西汉中723001

出　　处：《电镀与精饰》2013年第5期43-46,共4页Plating & Finishing

基　　金：陕西省教育厅项目(11JK0754);陕西省"13115"科技创新工程项目(2010ZDGC-23)

摘　　要：以土豆淀粉为原料、环氧氯丙烷为交联剂制备交联淀粉,再进行黄原酸化反应制备不溶性淀粉黄原酸酯,利黄原酸酯吸附电镀废水中的Cr(Ⅵ)。通过正交试验确定黄原酸酯对含Cr(Ⅵ)废水的最佳实验条件,ρ[Cr(Ⅵ)]=25mg/L时,以40r/min慢速搅拌,在pH=8,反应t为40min,投加4g/L黄原酸酯时,Cr(Ⅵ)去除率为99.7%,Cr(Ⅵ)的出水质量浓度为0.075mg/L,低于国家最高允许排放限值中的新建电镀企业排放限值。Insoluble starch xanthate （ISX） was obtained by xanthate acidification reaction of crosslinked starches which prepared by use of potato starch as raw material and epichlorohydrin as crosslinking agent. Cr（VI） in plating wastewater was adsorbed by ISX and the optimum conditions were also confirmed by orthogonal test. The best removal rate of Cr（ WI ） is 99.7% under conditions of concentration of Cr（ VI ） with 25 mg/L,low rate stirring speed with 40 r/min, pH = 8, reaction time with 40 min, and ISX dosage with 4 g./L. The effluent concentration of Cr（ VI ） is 0. 075 mg/L,whieh is below the discharge limit value of new electroplating enterprise in Emission Standard of Electroplating Pollutants GB 21900-2008.

关 键 词：不溶性淀粉黄原酸酯 Cr(Ⅵ) 电镀废水 重金属废水 

分 类 号：X703[环境科学与工程—环境工程]