3-氨基丙基三乙氧基硅烷制备有机-无机复合絮凝剂
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摘要
以3-氨基丙基三乙氧基硅烷和氯化铝为原料,采用微量滴碱法合成出有机-无机复合高分子絮凝剂,利用正交试验设计优化了合成条件,对最佳条件下合成的絮凝剂与聚合氯化铝进行了对比。结果表明:在碱液滴加时间为3. 5 h、氢氧化钠碱化度(B值)为2. 0、原料Si/Al(摩尔比)为0. 3的条件下,合成出的絮凝剂中Alb含量最高,其总铝浓度为0. 25 mol/L;该絮凝剂的除浊和脱色性能均优于传统絮凝剂聚合氯化铝。
A new organic-inorganic composite polymer flocculant was synthesized with 3-amino propyl triethoxy silane and aluminum chloride as raw materials by micro drop alkali method,the synthesis conditions were optimized by the orthogonal test,and the flocculants were compared with polyaluminum chloride under the optimum conditions. The results showed that under the conditions of addition time of alkali solution 3. 5 h,alkalisation degree of sodium hydroxide( B value) 2. 0 and n( Si)/n( Al)0. 3,the content of Alb was the highest and the total aluminum concentration was 0. 25 mol/L in the synthesized flocculant,the turbidity and decolorization of the flocculant were superior to those of conventional flocculant polyaluminum chloride.
A new organic-inorganic composite polymer flocculant was synthesized with 3-amino propyl triethoxy silane and aluminum chloride as raw materials by micro drop alkali method,the synthesis conditions were optimized by the orthogonal test,and the flocculants were compared with polyaluminum chloride under the optimum conditions. The results showed that under the conditions of addition time of alkali solution 3. 5 h,alkalisation degree of sodium hydroxide( B value) 2. 0 and n( Si)/n( Al)0. 3,the content of Alb was the highest and the total aluminum concentration was 0. 25 mol/L in the synthesized flocculant,the turbidity and decolorization of the flocculant were superior to those of conventional flocculant polyaluminum chloride.
引文
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[13]孙海云,朱红,王方辉,等.SiO2/CS-AM-DMC无机-有机絮凝剂固液分离油田废弃钻井液[J].化工科技,2011,19(4):1-6.
[14]周勤,肖锦,吴友明.PASS混凝去除给水腐殖酸的研究[J].环境科学与技术,2002,25(6):8-12.
[15]Shi B Y,Wei Q S,Wang D S,et al.Coagulation of humic acid:the performance of preformed and non-preformed Al species[J].Colloids and Surfaces A-Physicochemical and Engineering Aspects,2007(296):141-148.
[2]Iler R K.The Chemistry of Silica[M].New York:John Wiley&Sons,1979:205.
[3]陈金苹,朱斌,张建法.复合高分子絮凝剂的研究进展[J].水处理技术,2014,40(4):6-10.
[4]彭建雄,赵华章.共价键型硅铝复合絮凝剂的铝形态分布及其絮凝性能研究[J].环境科学,2009(6):1705-1710.
[5]秦墨涵,赵华章,任丽梅,等.共价键型有机硅铝复合絮凝剂的混凝效果[J].环境工程学报,2014(4):1262-1266.
[6]李善仁,李风亭.无机和有机复合高分子絮凝剂的现状和发展方向[J].能源环境保护,2002,16(2):15-19.
[7]杨轲.强化混凝-无机有机复合高效絮凝剂的研究与应用[D].鞍山:辽宁科技大学,2016.
[8]Tang H X,Luan Z K.Features and mechanism for coagulationflocculation process of polyaluminum chloride[J].Journal of Environmental Science,1995(7):204-211.
[9]Gao B Y,Chu Y B,Yue Q Y,et al.Characterization and coagulation of a polyaluminum chloride(PAC)coagulant with high Al13 content[J].Journal of Environmental Management,2005,76(2):143-147.
[10]汤鸿霄,栾兆坤.聚合氯化铝与传统混凝剂的凝聚-絮凝行为差异[J].环境化学,1997,16(6):497-505.
[11]Burrows M D.Aquatic aluminum chemistry,toxicology and environmental prevalebce[J].CRC Critical Reviews in Environmental Control,1997(7):167.
[12]马安远.无机有机复合絮凝剂在钢铁企业污水处理中的应用研究[D].秦皇岛:燕山大学,2016.
[13]孙海云,朱红,王方辉,等.SiO2/CS-AM-DMC无机-有机絮凝剂固液分离油田废弃钻井液[J].化工科技,2011,19(4):1-6.
[14]周勤,肖锦,吴友明.PASS混凝去除给水腐殖酸的研究[J].环境科学与技术,2002,25(6):8-12.
[15]Shi B Y,Wei Q S,Wang D S,et al.Coagulation of humic acid:the performance of preformed and non-preformed Al species[J].Colloids and Surfaces A-Physicochemical and Engineering Aspects,2007(296):141-148.