蛭石负载壳聚糖处理Cu2+的研究毕业论文.doc

湖南化工职业技术学院 毕 业 论 文 论文题目： 蛭石负载壳聚糖处理Cu2+的研究 院系名称： 应用化学系 专业班级： 工业分析与检验 学生姓名： 赵 卓 学 号： 201012020128 指导教师： 石 慧 2012年12月7日 摘 要 蛭石是一种天然、无毒的矿物质,在高温作用下会膨胀的矿物。它是一种比较少见的矿物，属于硅酸盐。其晶体结构为单斜晶系。蛭石有较高的层电荷数，故具有较高的阳离子交换容量和较强的阳离子交换吸附能力壳聚糖是甲壳质经脱乙酰反应后的产品, 在特定的条件下，甲壳素和壳聚糖能发生水解、烷基化、酰基化、羧甲基化、磺化、硝化、卤化、氧化、还原、缩合和络合等化学反应壳聚糖中含有酞胺基(-NHCO-)、胺基(-NH2)和羟基(-OH)，对金属离子有较强的吸附性。Cu2+。最佳工艺条件是:壳聚糖与蛭石质量比为1:18，吸附剂用量为:25g/L，吸附时间为60min，pH值为6-8，废液中Cu2+质量浓度不大于83.09ug/mL。此工艺条件下，Cu2+的去除率为80%以上。 关键词：壳聚糖 蛭石 吸附剂 铜离子 废水处理 Title： Disperion of chitosan on Vermiculite for Removal of copper (Ⅱ) aqueous solution Abstract Vermiculite is a kind of natural, non-toxic mineral, under high temperature will be expanded mineral. It is a relatively rare mineral, which belongs to the silicate. Its crystal structure is monoclinic, vermiculite has higher layer charge, and it has high cation exchange capacity and strong cation exchange adsorption capacity. Chitosan is chitin by deacetylation of the product, in particular conditions, chitin and chitosan can undergo hydrolysis, alkylation, acylation, carboxymethylation, sulfonation, oxidation, halogenation, nitration, reduction, condensation and complex chemical reaction. Chitosan containing phthalein amine ( -NHCO- ), ( -NH2 ) amine and hydroxyl ( -OH ), the metal ions have a stronger adsorption. This paper explores the vermiculite loading chitosan on metal copper ion from waste water treatment method. And the vermiculite loading chitosan on wastewater in the study of copper ion is discussed. At the same time, access to a large number of documents and the Handbook of solvents, after experimental verification, 60 - 100 head of vermiculite and the degree of deacetylation of chitosan for 81.39% 1% acetic acid solution, made of composite adsorbent for the removal of copper containing waste liquid, Cu2+. The optimum process c