氨基磺酸铵-细菌纤维素对Pb^(2+)的吸附性能及机理  

Adsorption Property and Mechanism of Ammonium Sulfamate-Bacterial Cellulose to Pb^(2+)

作　　者：鲁敏[1] 关晓辉[2] 魏德洲[1] 李彦英 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]东北电力大学化学工程学院,吉林省吉林市132012

出　　处：《东北大学学报（自然科学版）》2011年第7期1036-1040,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50174014);辽宁省科技攻关项目(2009221006)

摘　　要：为了提高细菌纤维素(BC)对重金属离子的吸附性能,以细菌纤维素为原料通过化学修饰的方法对其进行改性,制备了新型的重金属离子吸附剂氨基磺酸铵-细菌纤维素(ASBC).同时将制得的ASBC用于吸附重金属Pb2+,考察了其对Pb2+吸附性能,并对吸附机理进行了初步研究.结果表明:pH值是影响氨基磺酸铵-细菌纤维素对Pb2+吸附效果的重要参数,对Pb2+的吸附符合二级反应动力学特征和Langmuir吸附等温方程,并具有良好的线性,说明ASBC对Pb2+是典型的单分子层吸附;静电吸引和螯合作用是吸附的主要机理之一.The new adsorbent of ammonium sulfamate-bacterial cellulose（ASBC） was prepared through chemical modification of bacterial cellulose.ASBC was used for removing Pb2＋ in order to study the adsorption property and mechanism of ASBC. The results showed that pH is a very important parameter to the adsorbed efficiency.The adsorption rate can be well fitted by pseudo-second rate model,the adsorption isotherm can be described by Langmuir model and they have good linear relationship.Typical single-molecule layer adsorption of ASBC for Pb2＋ can be described.And the electrostatic attraction and chelating effect are one of main mechanisms of adsorption.

关 键 词：氨基磺酸铵-细菌纤维素 细菌纤维素 吸附性能 吸附机理 PB2+ 

分 类 号：TQ342.86[化学工程—化纤工业]