磺甲基化改性对重金属..doc

PAM/SiO2磺甲基化对重金属吸附研究 PAGE PAGE 1 题目：PAM/SiO2磺甲基化改性对重金属 吸附研究 PAM/SiO2磺甲基化改性对重金属吸附研究 摘要 以过硫酸钾为引发剂、N，N－亚甲基双丙烯酰胺为交联剂，通过水解正硅酸乙酯(TEOS)引入无机相，采用水溶液聚合制得聚丙烯酰胺/二氧化硅(PAM/SiO2)树脂，再以1:1（物质的量比）的过硫酸氢钠和甲醛溶液为磺甲基化试剂，对PAM/SiO2树脂进行改性,并测试改性后的树脂对重金属铜离子和铅离子的吸附性能。实验表明当TEOS用量为9.375%（相对于丙烯酰胺单体）时制得的改性树脂对铜离子和铅离子的吸附最佳。其中对铅离子(Pb2+)吸附容量最高可达4.6mmol/L，脱除率可达70%。对铜离子吸附在容量最高可达1.4mmol/L，脱除率可达27.6%。 关键词：聚丙烯酰胺；正硅酸乙酯；吸附；重金属；磺甲基化 PAM/SiO2 sulfonylureas methylation modification of heavy metal adsorption study Abstract To acrylamide (AM), teos (TEOS) as main monomer, initiator.N,N - methylene group double acrylamide as crosslinking agent adopt water solution polymerization PAM/SiO2 resin made got.and focuses on the synthesis of different dosage TEOS of resin, through used acid hydrogen sodium. formaldehyde press 1:1 reaction makes PAM/SiO2 resin sulfonylureas methylation modification of modified resin copper ions and heavy metal lead ions adsorption experiments. Adopt ethylenediamine tetraacetate (EDTA) solution to adsorption solution titration. Through experimental calculation shows that when TEOS dosage for 9.375% (relative to the acrylamide monomer) system of modified resin of copper ions and lead ions adsorption best. To lead ions (Pb2 +) adsorption capacity tiptop mmol/L. 4.6 removal rate 70%. On copper ions adsorption in capacity tiptop 1.4 mmol/L. removal rate can reach 27.6%. Keywords: polyacrylamide; Teosadsorption; Heavy; metals; Sulfonylureas methylation. 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc282536243 第一章：绪论 PAGEREF _Toc282536243 \h 4 HYPERLINK \l _Toc282536244 第二章：实验部分 PAGEREF _Toc282536244 \h 4 HYPERLINK \l _Toc282536245 2.1选题设想 PAGEREF _Toc282536245 \h 4 HYPERLINK \l _Toc282536246 2.2主要原料与药品 PAGEREF _Toc282536246 \h 5 HYPERLINK \l _Toc282536247 2.3实验仪器 PAGEREF _Toc282536247 \h 5 HYPERLINK \l _Toc282536248 2.4反应机理 PAGEREF _Toc282536248 \h 6 HYPERLINK \l _Toc282536249 2.5实验步骤 PAGEREF _Toc282536249 \h 6 HYPERLINK \l _Toc28253625