毕业论文：《分子组装壳聚糖聚胺-膨润土材料对铀、锶离子的吸附应用研究》.docVIP

精品 题 目:分子组装壳聚糖聚胺-膨润土材料对铀、锶离子的吸附应用研究 English title:Adsorption Application Research of Chitosan Polyamine and Bentonite Materials to U（Ⅵ）and Sr(Ⅱ) Based on the Molecular Assembly 姓 名: 学 号: 指导教师: 教授 专 业: 核化工与核燃料工程 二零一二年六月 精品 摘 要 分子组装壳聚糖聚胺-膨润土材料作为一种新型材料，对放射性离子的吸附具有选择性高、吸附容量大、效率高等特性，产生二次污染少，可回收利用，且价格低廉等优点，并且对化学、辐射、热和机械力等有很大的抗性。本文主要介绍壳聚糖与膨润土组装成的壳聚糖聚胺-膨润土材料，分别以UO22+、Sr2+为模板离子，制成印迹材料，吸附废水中的铀离子和锶离子，并且实验研究在不同的吸附剂用量、溶液pH值、吸附温度、吸附时间、溶液初始浓度等因素下对吸附效果的影响。实验结果表明吸附锶离子的最佳条件为：吸附剂用量400mg，溶液pH=7，温度70℃，吸附时间为60min，铯离子初始浓度为3μg/mL;吸附铀离子的最佳条件为：吸附剂用量300mg，溶液pH=5，温度70℃，吸附时间为75min，铀离子初始浓度为0.5μg/mL。 关键词：分子组装；膨润土；壳聚糖；吸附 精品 ABSTRACT The adsorption, the new material of Molecular assembling polyamide-bentonite materials of Chitosan to the radioactive ions, have good selectivity and adsorption capacity. And it has the advantages of a little secondary pollution,recyclable using, and low prices,besides it has a strong resistance to radiation, chemical, heat and mechanical. This paper mainly introduces inorganic polyamino materials assembled by chitosan and diatomite. it can be use to adsorb Uranium ion of wastewater when U6+ as template agent, or Cs ion when Cs+ as template agent. The effects of adsorption temperature, adsorbent dosage, adsorption time, pH value, initial solution concentration and coexistence ion were investigated in this article. Experimental results showed that the optimal adsorbing conditions of Cs+ are determined as temperature 70℃, reacting time 60 min , pH 7, absorbent dosage 400mg, Cs+ ion concentration 3μg/ml; the optimal adsorbing conditions of U6+ are determined as temperature 70℃, reacting time 75 min, pH 5.0, absorbent dosage 300mg,Cs ion concentration 0.5μg/ml. Keywords: molecular assembly; diatomite; chitosan; adsorption; 精品 目 录 TOC \o 1-3 \h \u α射线、 β射线、 γ射线等），同时释放出能量，最终衰变形成稳定的元素而停止放射的元素。在核工业的各个主要生产环节以及放射性同位