中文摘要：

通过实验室模拟实验,研究了柠檬酸、铝与氟的交互作用对茶园土壤氟吸附特征及形态分布的影响。结果表明，同对照相比．在氟的初始浓度小于3．0mmol·L^-1时，柠檬酸存在下对氟的吸附量影响不明显，而氟的初始浓度大于3．0mmol·L^-1时，柠檬酸存在下氟的吸附量显著增加，且随氟的初始浓度增加氟的吸附量增加越显著。不同氟铝比条件下，茶园土壤对氟的吸附量减少，且随铝比例的增加．对氟的吸附量影响越显著。在低浓度柠檬酸存在下，不同氟铝比对茶园土壤氟吸附量的影响与无柠檬酸存在时比差异较小；在高浓度柠檬酸存在下，不同氟铝比对茶园土壤氟吸附量的影响与无柠檬酸存在时比较显著，使不同氟铝比条件下茶园土壤氟吸附量明显增加。柠檬酸与铝分别存在和共存下，茶园土壤对氟的吸附热力学特征均可以用Freundlich方程和Temkin方程描述，而Langmuir方程并不能用于描述所有情况下茶园土壤氟的吸附热力学特征。进入茶园土壤的外源氟向各种形态转化，但以残渣态和水溶态为主。柠檬酸与铝分别存在和共存下均对通过吸附平衡后茶园土壤各形态氟含量和转化率有不同程度的影响，但茶园土壤氟的形态分布规律均为残渣态〉〉水溶态〉有机态〉铁锰态〉交换态。

英文摘要：

Effects of interaction of citric acid-aluminum-fluoride on adsorption characteristics and distribution of fluoride in tea garden soil were studied by the simulated test. The adsorption amount of fluoride varied little when the initial concentration of fluoride was lower than 3.0 mmol·L^-1, but increased obviously with the increasing of initial fluoride concentration when it was higher than 3.0 mmol·L^-1 in tea garden soil compared to the control. The adsorption amount of fluoride decreased under the existing of aluminum compared to the control, and the effect of aluminum on the adsorption amount of fluoride was more significant with the increasing of aluminum. Compared with that without existing of citric acid, the adsorption amount of fluoride varied little under the co-existing of aluminum and low concentration citric acid, and increased distinctly under the co-existing of aluminum and high concentration citric acid. The two equations of Freundlieh and Temkin can be used to describe the thermodynamics characteristics of fluoride in the tea garden soil under the existing of citric acid or aluminum or the co-existing of them, however, the Langmuir equation can not be suitable to describe the adsorption characteristics of fluoride under the test conditions. The fluoride adsorbed in tea garden soils could be transformed into different forms, i.e. water soluble, exchangeable, Fe-Mn oxide, organic and residual forms, but the water soluble and residual forms were the main forms of fluoride in tea garden soil. Though there were different effects of existing or co-existing of citric acid and aluminum on the contents and transforming rate of different forms of fluoride, the distribution of fluoride in tea garden soil followed the order of residual〉〉water soluble〉organic〉Fe-Mn oxide〉exchangeable.