羧甲基壳聚糖改性污泥吸附剂的制备及其对亚甲基蓝吸附性能研究  

Study on Preparation of Sludge Adsorbent Modified by Carboxymethyl Chitosan and its Adsorption Performance for Methylene Blue

作　　者：梁浩 冼恩祺 李灏 凌晨明 潘志辉[1,2] Liang Hao;Xian Enqi;Li Hao;Ling Chenming;Pan Zhihui(School of Civil Engineering,Guangzhou University,Guangzhou,Guangdong 510006,China;Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Guangzhou University,Guangzhou,Guangdong 510006,China)

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]广州大学珠江三角洲水质安全与保护省部共建教育部重点实验室,广东广州510006

出　　处：《绿色科技》2021年第8期110-112,116,共4页Journal of Green Science and Technology

基　　金：国家自然科学基金(编号:51778179)。

摘　　要：采用天然来源的羧甲基壳聚糖(CMC)负载至经碳化法处理得到的污泥吸附剂(SSA)表面,制备了具高效去除染料亚甲基蓝(MB)的吸附剂(CMC-SSA)。考察了CMC-SSA对MB的吸附动力学与热力学研究,以及pH值对吸附效能影响。结果表明:SSA经过改性后,CMC-SSA的吸附性能大大增强;并且结合比表面积与孔结构、FT-IR和Boehm滴定等手段分析得出CMC-SSA的吸附机理主要为化学吸附作用,CMC的负载增强了SSA的化学吸附能力。In this study,carboxymethyl chitosan(CMC)from natural sources was loaded on the surface of sewage sludge adsorbent(SSA)after carbonization to prepare an adsorbent(CMC-SSA)with high efficiency for removing the dye methylene blue(MB).The adsorption kinetics and thermodynamics of MB by CMC-SSA and the effect of pH on the adsorption efficiency were investigated.The results showed that the adsorption performance of CMC-SSA was greatly enhanced after the modification of SSA;Furthermore,combined with specific surface area and pore structure,FT-IR and Boehm titration,it is concluded that the adsorption mechanism of CMC-SSA is mainly chemical adsorption,and the loading of CMC enhances the SSA chemical adsorption capacity.

关 键 词：亚甲基蓝 吸附剂 羧甲基壳聚糖 化学吸附 

分 类 号：X788[环境科学与工程—环境工程]