琥珀酸酐改性麦草浆对Cd(Ⅱ)的吸附性能  

Adsorption properties of Cd(Ⅱ)by wheat straw pulp with succinic anhydride

作　　者：王永为[1] 蔡九霄[1] 郭宏[2] 陈丽凤[2] 杨大伟[2] 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034 [2]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2014年第3期182-185,共4页Journal of Dalian Polytechnic University

摘　　要：以二甲苯作溶剂、三乙胺作催化剂,通过琥珀酸酐改性麦草浆(WSP),制备出一种新型吸附剂S-WSP。通过红外光谱对S-WSP进行表征结构分析,该酯化反应在异相催化条件下能够顺利进行。S-WSP的羧酸基团与NaOH溶液作用去质子化可成功获得NaS-WSP。NaS-WSP悬浮在水溶液中吸附Cd2+,最大吸附量可达105.7mg/g,其动力学过程遵循伪二级动力学模型。由于在离子交换过程中竞争质子,该吸附剂的吸附能力会随着pH的下降而降低。A new type adsorbent was prepared by modifying wheat straw pulp（WSP）with succinic anhydride.The succinylated-wheat straw pulp（S-WSP）was characterized with FTIR,indicated that the heterogeneous esterification was proceeded efficiently as proposed.After treated by NaOH the NaS-WSP was obtained,which showed the ability to adsorb cadmium（II）from aqueous solution.Its maximum adsorption capacity was 105.7mg/g and the kinetic process followed a pseudo-second-order kinetics model.The adsorption capacity was decreased with decreased pH.

关 键 词：麦草浆 琥珀酰化 吸附 镉离子 

分 类 号：X712[环境科学与工程—环境工程]