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在一定条件下,利用钠基化蒙脱石(Na-Mt)合成聚合羟基铁铝一蒙脱石复合体(HyFeAl-Mt),M3+/Mt比为10 mmoL/g,Fe3+/Al3+摩尔比分别为0.1、0.2和O.5.研究了酸性和弱酸性条件下低分子有机酸(以柠檬酸、草酸和苹果酸为代表)及其添加顺序对HyFeAl-Mt复合体吸附磷的影响.结果表明,低分子有机酸对HyFeAl-Mt复合体吸附磷有抑制作用,且随着低分子有机酸浓度的增加愈加明显,酸性条件下的抑制作用比弱酸性条件下明显;低分子有机酸羧基个数越多、分子结构越大,对HyFeAl-Mt吸附磷的影响越大;酸性环境中低分子有机酸与磷共存时,磷吸附曲线较好地符合Fteundlich方程,且其对磷在HyFeAl-Mt0.2上的最大吸附量影响较小;磷与低分子有机酸的添加顺序不同也影响HyFeAl-Mt复合体对磷的吸附.“,”Two hydroxyiron/aluminmum-montmofillonite complexes (HyFeAl-Mt) with different Fe:Al molar ratios were synthesized,with 0.2 and 0.5 malars of HyFeAl-Mt0.2 and HyFeAl-Mt0.5,respectively.The effects of LMWA (citric acid,oxalic acid and malic acid,as 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.P Sorption in the presence of LMWA follows the Freundlich isotherms.Maximum adsorption of phosphate on the HyFeAl-Mt0.2 is slightly affected by the presence of LMW organic acids.Different orders of LMW organic acid and P addition into the solution containing HyFeAl-Mt0.2 have appreciable effects to P sorption.