The Effect of Low Molecular Weight Organic Acids to Phosphate Adsorption by Hydroxyaluminum/ Iron- Montmorillonite Complexes

• 责任者：Ding Kuiying (Weifang Entry-Exit Inspection and Quarantine Bureau of the People’s Republic of China ; Weifang 261041 ; China) ; Zhu Maoxu
• 刊名：Acta Mineralogica Sinica
• 出版年：2010
• 卷期：30(1)
• 关键词：有机酸 ; organic acids ; 蒙脱石 ; montmorillonite ; 磷 ; phosphorus
• 页码：p.56-62
• 图表：4 illus., 3 tables, 13 refs.
• 分类号：0700
• issnNo：ISSN1000-4734
• isbnNo：CN52-1045/P

Two hydroxyiron/aluminmum-montmorillonite complexes ( HyFeAl-Mt) with different Fe∶ Al molar ratios were synthesized, with 0.2 and 0.5 molars of HyFeAl-Mt 0.2 and HyFeAl-Mt 0.5, respectively.  The effects of LMWA(citric acid, oxalic acid and malic acid, as an example) to phosphate adsorption by Mt complexes were investigated under weak acids and strongly acidified conditions.  The added sequence of LMWA was studied.  The results indicate that the effects of LMW organic acids to P adsorption were more effective in low pH than in high pH, and the effect is increasing with enhancing concentrations of LMW organic acid.  For different LMW organic acids, the effects are different.