摘要
利用煤矸石灰渣制取聚硅酸铝（ＰＳＡ）混凝剂以及利用ＰＳＡ混凝剂处理印染和钢厂除尘废水。实验表明，该混凝剂具有优良的除浊、除色、除ＳＳ性能。与常规混凝剂相比。ＰＳＡ混凝剂的脱色率和ＳＳ去除率均提高２０％～４０％。综合考虑ＳＳ去除率、脱色率两方面因素，在处理废水时，选择ｐＨ值为６．０，沉降时间１５～２０ｍｉｎ为最佳。本文还对ＰＳＡ混凝剂的混凝脱色机理进行了初步探讨。
Using coal gangue slag, a new polysilicate aluminium(PSA) coagulant was prepared ,by which the dyeing and steelworks dusting wastewater were treated. The results show that it has better properties for removing turbidity, color and suspended substance (SS) than traditional coagulant. The removal rates of color and SS increase by 20%￣40% respectively. Meanwhile,the decoloring mechanism of PSA coagulant was mainly forming unstable compounds with hydrolytic aluminium ions and then conglomerating with polysilicate acid in PSA coagulant.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1996年第5期396-400,共5页
China Environmental Science
关键词
煤矸石灰渣
PSA
混凝剂
废水
脱色机理
coal gangue slag
PSA
coagulant
wastewater
decoloring mechanism.
