文献类型：期刊文献

中文题名：萃取法回收水厂污泥中铝的技术研究 Ⅰ.清液萃取法

英文题名：Alum Recovery from Waterworks Sludge by Solvent Extraction Using Bi-(2-ethylhexyl)phosphate Ⅰ.Liquor Extraction

作者：徐美燕[1];马燕[1];孙贤波[1];赵庆祥[1]

机构：[1]华东理工大学资源与环境工程学院,上海200237

年份：2007

卷号：33

期号：3

起止页码：369

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：水厂污泥;铝回收;萃取;反萃取;二-(2-乙基己基)磷酸

外文关键词：waterworks sludge; alum recovery ; extraction; stripping; bi-（2-ethylhexyl） phosphate

摘要：水厂污泥的铝含量高,是一种重要的铝再生资源。研究了液相离子交换萃取法铝回收技术。采用P204-煤油作为萃取剂,与水厂污泥的酸溶浸出液反应,经3级错流萃取,铝萃取率可达96.3%。以5 mol/L硫酸为反萃剂,在相比(VO∶VA)为5∶1的条件下经3级反萃,铝反萃率达到98.9%,反萃液符合液态商品硫酸铝的质量标准,可作为饮用水处理的混凝剂回用。
The study results have demonstrated that A1 present in a water treatment plant sludge （SiO2 58.3%, Al2O3 6.31%, organic matters 12.2%） may be recovered and recycled as liquid alum for coagulation treatment. The sludge was first dissolved in H2SO4 solution （1 mol/L, 3 g H2SO4 for 1 g Al2O3）, and Al was then recovered by liquid phase extraction using a mixture of bi-（2-ethylhexyl） phosphate （P204） and kerosene. Under the optimal conditions of pH=3.5, cp204 =0.8 mol/L, and phase ratio Vo ： VA=1 ： 1, 96. 3% of Al was recovered in 3-stage extraction. Al in the extraction liquor was then stripped by H2SO4（5 mol/L） in 3-stage stripping at a phase ratio of 5 ：1; 98.9% of Al was moved to the aqueous phase which was reusable in the waterworks.