对中南地区花岗岩上发育的5种土壤的氟吸附特征及其与磷、硫竞争吸附的研究结果表明:(1)土壤对氟的吸附量随加入氟浓度增大而增加,且在吸附时不断释放OH－,使平衡液PH升高.氟吸附容量的大小次序为:红壤＞赤红壤＞黄棕壤和砖红壤.氟吸附与LANGMUIR方程、FRE－UNDLICH方程和TEMKIN方程有极好的拟合性;(2)氟、磷、硫之间存在着竞争吸附,在磷酸根或硫酸根存在时,土壤对氟的吸附量增加,氟吸附等温线位置上移,曲线斜率变大.“,”The adsorption of fluoride and its competitive adsorption with phosphate or sulphate on 5 kinds of soils derived from granite,in middle?south China,were studied.Results indicated that:(1) The amount of fluoride adsorption increased with the increasing of flouride concentration and the pH value of equilibrium solution raised with the releasing of OH?- in the process of F?- adsorption.The order of F?- adsorption capacity was as follows:red soil>lateritic soil>yellow brown soil and latosol.The trial data of F?...