硝酸钇与羧甲基壳聚糖联合使用处理印染污水  

Treatment of Printing and Dyeing Wastewater with Use of Both Yttrium Nitrate and Carboxymethyl Chitosan

作　　者：陈忻[1] 袁毅桦[1] 张小龙[1] 孙恢礼[2] 

机构地区：[1]佛山科学技术学院化学与化工系,广东佛山528000 [2]中国科学院南海海洋研究所,广东广州510301

出　　处：《环境科学与技术》2010年第S2期268-271,共4页Environmental Science & Technology

基　　金：佛山市科技发展专项基金项目资助(2005060071);中国科学院知识创新工程重要方向项目资助(KZCX2-YW-209)

摘　　要：联合使用硝酸钇与羧甲基壳聚糖作絮凝剂处理印染污水,研究了当羧甲基壳聚糖用量为480mg/L,pH值为2.3时,硝酸钇投加量和处理温度这二个因素对印染污水的色度去除率、除浊率、COD和氨氮去除率的影响。实验结果表明,硝酸钇的投加量为5mg/L,温度为50℃时絮凝剂可使印染污水的色度去除率和除浊率均达99%,COD去除率为76.59%,氨氮去除率为77.12%;硝酸钇与羧甲基壳聚糖联合使用的絮凝脱色效果优于单独使用羧甲基壳聚糖。The effectiveness of Yttrium nitrate,carboxymethyl chitosan and their composite as a flocculant to printing and dyeing wastewater was investigated which was on based on the dosage of carboxymethyl chitosan of 480mg/L,pH=2.3.It was discovered that there were two influencing factors which were the dosage of rare earth and temperature.The best dosage of rare earth of Yttrium for treatment were found to 5mg/L and the best temperature was 50℃.Then the chroma and the turbidity of printing and dyeing waste water could be reduced by over 99%,the chemical oxygen demand(COD) could be reduced by 76.59%,the ammonia nitrogen(NH3-N) could be reduced by 77.12%.Contrarily,the effect with only use of carboxymethyl chitosan was unevidence.

关 键 词：硝酸钇 羧甲基壳聚糖 印染污水 絮凝脱色 

分 类 号：X703[环境科学与工程—环境工程]