高岭土负载壳聚糖处理铬渣污染地下水  

Treatment of groundwater polluted by chromium residue with kaoline-chitosan compound adsorbent

作　　者：刘荣香[1] 张焕祯[1] 刘峻平[1] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《工业水处理》2012年第5期44-47,共4页Industrial Water Treatment

基　　金：国土资源部中国地质调查局基础地质调查项目(1212011121173)

摘　　要：采用高岭土负载壳聚糖复合吸附剂吸附处理铬渣污染的地下水,确定了最佳反应条件:壳聚糖与高岭土质量比为0.06,pH为4,吸附时间60 min,吸附剂用量为2.00 g/L,在此条件下去除率可达94.67%,Cr(Ⅵ)由0.5mg/L降至0.026 mg/L,可满足GB/T 14848—1993的Ⅲ类标准要求。该吸附剂对Cr(Ⅵ)的吸附过程符合Freundlich、Langmuir和D-R吸附等温模型,主要以物理吸附为主。研究表明高岭土负载壳聚糖适于处理铬渣污染的地下水。The applicability of kaoline-chitosan as compound adsorbent for the removal of Cr （Ⅵ） from the ground- water polluted by chromium residue has been investigated. When the optimum reaction conditions are as follows ： the mass ratio of kaoline and chitosan is 0.06, pH=4, adsorbing time 60 min and adsorbent dosage 2.00 g/L, the removing rate can reach 94.67% and the Cr（ Ⅵ ） concentration of the disposed groundwater is from 0.5 down to 0.026 mg/L, meeting the requirements of the third class of Quality Standard for Ground Water （GB/T 14848- 1993 ）. The adsorbing course of Cr（ Ⅵ ） by this adsorbent is in accordance with Freundlich, Langmuir and D-R adsorption isotherms. And, the mechanism is primarily based on physical adsorption. The experimental results show that kaoline-chitosan compound adsorbent is suitable for treating groundwater polluted by chromium residue.

关 键 词：高岭土 壳聚糖 复合吸附剂 地下水 Cr(Ⅵ) 

分 类 号：X703[环境科学与工程—环境工程]