不溶性淀粉黄原酸酯的制备及其在含Cr(Ⅵ)废水处理中的应用  

Preparation of Insoluble Starch Xanthate and Its Applications in Treatment of Wastewater Containing Cr(Ⅵ)

作　　者：李琛[1] 

机构地区：[1]陕西理工学院化学与环境学院,陕西汉中723001

出　　处：《电镀与环保》2014年第4期50-53,共4页Electroplating & Pollution Control

基　　金：陕西省教育厅项目(No.11JK0760);陕西省"13115"科技创新工程项目(No.2010ZDGC-23)

摘　　要：以玉米淀粉为原料、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(ISX),并将其用于含Cr(VI)废水的处理。考察了环氧氯丙烷的用量、二硫化碳的用量、氢氧化钠的用量、黄原酸化时间、稳定剂的用量等制备条件对所制备的ISX处理含Cr(VI)废水效果的影响。最佳的制备条件为:玉米淀粉15g,交联剂2.2mL,氢氧化钠2.5mL,二硫化碳2.5mL,硫酸镁3g,黄原酸化反应3h。合成的淀粉黄原酸酯对质量浓度为50mg/L的含Cr(VI)废水的去除率达到99.6%以上。The insoluble starch xanthate （ISX） was prepared through the xanthation reaction of the crosslinked starch,which was prepared with corn starch as raw material and epichlorohydrin as crosslinking agent,and was used to treat Cr （Ⅵ） containing wastewater.The impact of use level of epichlorohydrin,carbon disulfide and sodium hydroxide,xanthation time,dosage of the stabilizer and other ISX preparation conditions on the effectiveness in treatment of the wastewater containing Cr（Ⅵ） was investigated.The best preparation conditions are：corn starch 15 g,cross-linking agent 2.2 mL,sodium hydroxide 2.5 mL,carbon disulfide 2.5 mL,magnesium sulfate 3 g,xanthation reaction time 3 h.The removal rate of Cr（Ⅵ） can reach more than 99.6 ％ when the starch xanthate synthesized under the above conditions is used to treat the wastewater containing 50 mg/L of Cr（Ⅵ）.

关 键 词：不溶性淀粉黄原酸酯 交联淀粉 含铬废水 

分 类 号：X52[环境科学与工程—环境工程]