羟基聚合氯化铝铁溶液的形态分布特征-环境科学学报.PDF

第 20 卷第 5 期 环 　境 　科 　学 　学 　报 Vol . 20 ,No . 5 2000 年 9 月 AC TA SCIEN T IA E CIRCU M STAN T IA E Sep . ,2000 ( ) 文章编号 2000 　　　中图分类号 :X703 . 5 　　　文献标识码 :A 羟基聚合氯化铝铁溶液的形态分布特征 (华南理工大学环境科学与工程系 ,广州 　5 10640) 胡勇有 ,涂传青 ,高 　健 ,张小平　 摘要 :采用改进的AlFeFerron 逐时络合比色法定量研究了 HPAFC 的形态分布 ,结合酸解聚实验和酸反滴定实验结果 ,描 述了其形态分布特征. 在碱化度 B 为 10 - 2 0 内, nAl/ n Fe = 9 ∶1 时 ,单体和二聚体[Al + Fe ]a 达 20 % - 60 % ; nAl/ n Fe = 5 ∶5 时达 30 % - 50 %. nAl/ n Fe = 9 ∶1 时 , 中间多核羟基络合物[Al + Fe ]b 达 20 % - 55 % ; nAl/ n Fe = 5 ∶5 时达 5 % - 20 %. nAl/ n Fe = 9 ∶1 时 ,溶胶[Al + Fe ]c 达 15 % - 35 % ; nAl/ n Fe = 5 ∶5 时达 30 % - 50 %. HPAFC 的形态是间断分布. 关键词 :羟基聚合氯化铝铁 ;形态分布 ;逐时络合比色 Species distribution of hydroxyl polymeric al uminumf erric chloride ( HU Yongyou , TU Chuangqin , GAO Jian ,ZHAN G Xiaoping 　Depart ment of Environmental Science and Engineer ing ,Sout h Chain Universit y of Technology , Guangzhou ,5 10640) Abstract :The species distribution of hydroxyl polymeric aluminumferric chloride ( HPAFC) was quantitatively studied wit h improved AlFeFerron timecolorimetric procedure ,acid depolymerization and continuous acid reverse titration experiment s and t he species dis tribution of HPAFC was described. When basicit y was in t he range of 10 - 2 0 ,t he monomer and dimer [Al + Fe ]a were 20 % — 60 % for nAl / nFe = 9 ∶1 and 30 % —50 % for nAl / nFe = 5 ∶5 ;t he intermediate multinuclear complex compounds [Al + Fe ]b were 20 - 55 % for nAl / nFe = 9 ∶1 and 5 % —20 % for nAl / nFe = 5 ∶5 ;and t he sol [Al + Fe ]c were 15 % —35 % for nAl / nFe = 9 ∶1 and 30 % — 50 % for nAl / nFe = 5 ∶5 . The species distribution characteristics of HPAFC were discontinut y . Keywords