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.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
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)
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+
ammonium sulfamate-bacterial cellulose（ASBC）
bacterial cellulose（BC）
adsorption property
adsorption mechanism
Pb2＋
