【作者】 鲁栋梁；

【导师】 夏璐；

【作者基本信息】 广西民族大学 ， 应用化学， 2010， 硕士

【摘要】 本文以可溶性淀粉与丙烯酰胺之间的接枝共聚和黄化反应为理论基础,创造性地合成了硫代氨基淀粉黄原酸盐（DSX）并用于吸附重金属离子废水,主要内容及结论如下:采用FTIR、H-NMR、（13）^C-NMR、XRD、SEM及TG等仪器对合成的硫代氨基淀粉黄原酸盐DSX进行表征,结果表明硫代氨基淀粉黄原酸盐（DSX）被成功制备。考察了合成中的交联剂、引发剂、丙烯酰胺及二硫化碳用量等因素,对合成产品应用于处理重金属离子的影响,运用正交实验寻找对重金属离子去除率比较高的DSX的合成条件,结果表明:交联剂物料比为10g︰1.25mL、引发剂物料比为10g︰4mL、丙烯酰胺物料比为10g︰3mL和二硫化碳物料比为10g︰5mL为最佳条件。此外还用可溶性淀粉与丙烯腈接枝共聚合成硫代氨基淀粉黄原酸盐（DSX-1）及与丙烯酸接枝共聚合成二硫酯基淀粉（DTS）。考察了温度、pH值、时间、离子浓度及投加量等因素对DSX应用于处理重金属离子废水的影响,采用均匀设计实验寻找处理重金属离子的最佳条件,实验表明:温度为40℃,pH值为9,吸附时间为50min,离子浓度为15mg/L,投加量为0.2g,Cu²⁺、Pb²⁺、Cd²⁺和Zn²⁺四种金属离子去除率最高分别为98.5%、98.3%、97.8%和97.5%。采用Langmuir和Freundlich等温方程及准一级动力学和准二级动力学对DSX吸附Cu²⁺、Pb²⁺、Cd²⁺和Zn²⁺重金属离子的吸附过程进行描述,结果表明:此吸附较符合Langmuir等温吸附和准一级动力学方程。更多还原

【Abstract】 In this paper dithioamino starch xantho genate（DSX） were first prepared basedon the graft and sulfonation reaciton theory of soluble strach and acrylamide.Thesederivatives were employed as a new adsorbent used for removing heavy metalsions in aqueous solutions.The procedures and results are shown as the following.The products are characterized by FTIR、elemental analysis、CNMR、HNMR、X-ray diffraction, SEM and TG,Results: dithioamino starch xanthogenate（DSX）was successfully synthesized. Effects of cross-bonding reagent、initiator、acrylamide and the amount of carbon disulfide on its applicationin absorption ofCu（Ⅱ）in aqueous solutions were studied. The use of orthogonal experiment to findpairs of heavy metal ion removal rate is relatively high synthesis conditions ofDSX. It is shown from the experiment results that: To obtain the product withhigher removing rate,the optimalsynthesis condition is that the feedstock ratio ofcross-bonding reagent was10g:1.25mL、initiator was10g:4mL、acrylamidewas10g:3mL and carbon disulfide was10g:5mL。Besides，Synthesis of DSX-1andDTS were soluble strach and acrylamide、crylic acid graft copolymerized byacrylamide and sulfonation．A study was carried out to investigate influence of different conditions on theadsorption of heavy metal ions in aqueous solutions, such as temperature、pHvalue、time、initial concentration and dosage of DSX etc, The uniform design ofexperiments to find the optimal adsorption conditions for treatment of heavy metalions. results show that: temperature was 40℃、pH value was 9、time was 50min、initial concentration was 15mg/L and dosage of DSX was 0.2g, the removal ratesof Cu²⁺、Pb²⁺、Cd²⁺and Zn²⁺ were 98.5%、98.3%、97.8%和97.5%, respectively。The data of Cu²⁺、Pb²⁺、Cd²⁺and Zn²⁺ the adsorption by DSX was discribed withthe Langmuir and Freundlich equations, The results showed that the absorptionprocess was corresponding with Langmuir and the first order kinetics model.更多还原