改性壳聚糖对硫酸废水中氯离子的吸附性能研究  

Researches on the adsorption capability of modified chitosan for chloride ions in sulfuric acid wastewater

作　　者：郭亚丹 喻文超[2] 陈锦全 梁平[2] 李鹏[2] 王学刚[2] Guo Yadan;Yu Wenchao;Chen Jinquan;Liang Ping;Li Peng;Wang Xuegang(China-Tin Group Co., Ltd., Liuzhou 545006, China;School of Water Resources ＆ Environmental Engineering, East China University of Scienee ＆ Technology, Nanchang 330013, China)

机构地区：[1]广西华锡集团股份有限公司,广西柳州545006 [2]东华理工大学水资源与环境工程学院,江西南昌330013

出　　处：《工业水处理》2018年第5期79-83,共5页Industrial Water Treatment

基　　金：中国博士后科学基金资助项目(2015M582748XB);广西博士后专项资助项目;江西省博士后科研择优资助项目(2016KY33)

摘　　要：采用了化学配位的方法 ,以两种有机酸、硫酸汞和壳聚糖为原料制备出Hg^(2+)改性壳聚糖(Hg-CTS)新型高效吸附剂,通过FT-IR、XRD、XPS、SEM等技术对吸附剂的物化特性和微观结构进行分析,对所制备的Hg-CTS吸附剂投加量、溶液初始pH、吸附时间对硫酸废水中Cl^-吸附效果的影响进行研究。实验结果表明,Cl-初始质量浓度为1 000 mg/L,Hg-CTS投加量为0.8 g/L,反应时间为20 min,pH为3的最优条件下,Cl^-的去除率达到94%,吸附容量为117.42 mg/g。同时,Hg-CTS吸附剂对Cl-吸附动力学符合拟二级动力学模型。A new type of highly efficient adsorbent,Hg-modified chitosan（Hg-CTS） has been prepared by chemical coordination method,using two kinds of organic acids,mercury sulfate and chitosan as raw materials,and its physiochemical characteristics and microcosmic structure characterized by measures,such as FT-IR,XRD,XPS,SEM,etc.The effects of the prepared adsorbent dosage,solution initial pH and adsorption time on the adsorption of Cl^-in sulfuric acid wastewater have been investigated. The experimental results show that the removing rate of Cl^-is 94% and adsorption capacity of Hg-CTS 117.42 mg/g,under the following optimal conditions,the Cl-initial concentration is 1 000 mg/L,Hg-CTS dosage 0.8 g/L,adsorption time 20 min and Ph value 3. In addition,the adsorption kinetics of Cl-by Hg-CTS adsorbent conforms to pseudo-second-order kinetics model.

关 键 词：壳聚糖 硫酸废水 除氯 吸附 

分 类 号：X703.1[环境科学与工程—环境工程] TQ424[化学工程]