Journal article

Effects of organic ligands on adsorption of phosphate on a noncrystalline al hydroxide

HQ Hu, JZ He, XY Li

Developments in Soil Science | Published : 2002


The effects of oxalate (OX), tartrate (TR), and citrate (CT) on the adsorption of phosphate (P) on a synthetic noncrystalline Al-hydroxide [Al(OH)x] were studied at different initial phosphate/ligand molar ratios and different reaction conditions. The quantities of P adsorbed by the Al(OH)x varied with the ligand concentrations and the reaction conditions. When OX was introduced to the reaction system before P (OX before P), the effect of OX in decreasing P adsorption was greater than that when OX was added as a mixture with P (OX+P) or when P was introduced before OX (P before OX). When P was added after OX adsorption and removal of residual OX solution (OX(-) before P), the effect of OX in..

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