苹果酸和丁二酸对茶园土壤氟吸附能力及形态分布的影响  

Effects of Malic Acid and Succinic Acid on Sorption and Distribution of Fluoride in Tea Garden Soil

作　　者：谢忠雷[1] 孙文田[1] 郭平[1] 郭晓静[1] 高福民[1] 

机构地区：[1]吉林大学环境与资源学院,长春130012

出　　处：《吉林大学学报（理学版）》2009年第2期392-396,共5页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:40573052)

摘　　要：通过茶园土壤采样和实验室模拟,研究苹果酸和丁二酸对茶园土壤外源氟吸附能力和形态分布的影响.在氟初始浓度较低的条件下(低浓度有机酸<0.42 mmol/L,高浓度有机酸<2.1 mmol/L),苹果酸和丁二酸对茶园土壤氟的吸附有一定的抑制作用;在氟初始浓度较高的条件下(低浓度有机酸>0.42 mmol/L,高浓度有机酸>2.1 mmol/L),苹果酸和丁二酸对茶园土壤氟的吸附有增强作用,且增强作用随吸附液氟初始浓度的增加而增大,苹果酸比丁二酸的增强作用大.茶园土壤外源氟大部分以残渣态存在,其次为水溶态.不同浓度的苹果酸和丁二酸对茶园土壤外源氟的形态转化有不同影响,但外源氟进入茶园土壤后形态分布的一般规律为:残渣态>水溶态>有机态≈铁锰态>交换态.Effects of malic acid and succinic acid on the sorption and distribution of fluoride in tea garden soil was studied by the sampling of tea garden soil and the simulated testing. The sorption capacity of fluoride by tea garden soil was depressed to some extent in the presence of malic acid and succinic acid when the initial concentration of fluoride was lower than 0.42 mmol/L for the low concentration of the organic acids and 2.1 mmol/L for the high concentration of the organic acids. The depressed function of the two organic aicds for the sorption of fluoride in tea garden soil, however, was weakened when the initial concentration of fluoride was higher than 0.42 mmoL/L for the low concentration of the organic acids and 2. 1 mmol/L for the high concentration of the organic acids. On the contrary, there was a distinct enhancing function for the sorption capacity of fluoride in tea garden soil in the presence of the two organic acids with increasing the initial concentration of fluoride, and the enhancing function of malic acid was larger than that of succinic acid. The residual species was the major form and water soluble species was secondary form for sorbed fluoride under the control treatment and in the presence of malic acid and succinic acid. There were also differences in the distribution and transformation of sorbed fluoride in tea garden soil in the presence of the different organic aicds and their concentrations, but the general distribution law of sorbed fluoride was in the order： residual 〉water soluble 〉 organic ≈ Fe-Mn oxide 〉 exchangeable.

关 键 词：茶园土壤 氟 苹果酸 丁二酸 吸附能力 形态分布 

分 类 号：X142[环境科学与工程—环境科学]