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作 者 ：沈阿林;崔转玲;姚同山;李学垣;徐凤琳

期 刊 ：植物营养与肥料学报 1997年 3卷 1期 页码：9-15

关键词：土壤；氟；吸附；解吸；

摘 要 ：中南地区6种土壤8个层次的氟吸附和解吸试验结果表明:供试土壤的氟吸附与Langmuir、Freundilich和Temkin方程均有较好的拟合性;花岗岩发育土壤的氟吸附量明显大于红砂岩和紫红色砂页岩发育的土壤。赤红壤、砖红壤、紫色土和黄棕壤性土吸附的氟可为0.1mol／LKOH完全解吸，而红壤和黄棕壤的氟解吸部分滞后，滞后的原因与14nm过渡性矿物较多有关。上还土壤吸附氟均不能被水完全解吸，解吸率因土壤不同而不同。花岗岩发育土壤的氟解吸率（26.9％～40.0％）比其他母质土壤（4.8％～94.2％）低。供试土壤对氟吸附和解吸的差异与土壤矿物特性，尤其是氧化物数量有关。

Abstract:The adsorption and desorption of fluoride on 8 kinds of soils, developed from granite, red sansy-stone and purplish sandy shale, in centre south China were studied.The results indicated that: (1) The trial data of F adsorption on examined soils were significantly conform to Langmuir, Freundlich and Temkin equations. The amount of fluoride adsorbed by soils developed from granite was abviously more than that of soils developed from red sandy stone and purplish sandy stone and purplish sandy shale. (2) The fluoride‘ adsorbed by soils derived from red sandy stone and purplish sandy shale,and laterltic soil and latosol developed from granite could be completely desorbed by 0. 1 mol/L KOH solution, whereas fluoride adsorbed by yellow brown earth and red earth could be only partly desorbed by it, which is related to more 14nm transitional mineral in yellow brown earth and red earth. (3) The fluoride adsorbed by examined soils could not be completely desorbed by water, and its ratio varied with soil. The rate of fluoride desorbed in soils derived from granite (26. 9%～40. O%) was smaller than that of soils developed from red sandy stone and purplish sandy shale (44. 8%～94. 20%). (4) The differences of characteristics of adsorption and desorption of fluoride among soils used were relative to the type and quantity of soil minerals, especially ferric oxide andalumina.

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