%0 Journal Article
%T Effect of low-molecular-weight organic acids on the adsorption of fluoride on soils with variable charge<br>低分子量有机酸对几种可变电荷土壤吸附氟的影响
%A XU Renkou
%A WANG Yayun
%A <br>徐仁扣
%A 王亚云
%J 环境科学学报
%D 2003
%I 
%X The effect of four low molecular weight organic acids on the adsorption of fluoride on soils with variable charge was investigated with a batch method. The results showed that organic acids reduced the adsorption of fluoride through competition with F - for sorption sites. The oxalic acid and malonic acid with simple chemical structure were more effective than citric acid and malic acid in reducing F - adsorption. The effect of organic acids on F - adsorption increased with the increase in pH. A higher content of iron oxides in soils led to more reduction in F - adsorption by organic acids. At low pH and with more fluoride added, existence of organic acids increased the adsorption of fluoride due to the competition of organic acids with F - for soluble Al and the increase of free fluoride in soil solution. This kind of effect mainly occurred in the soils with a higher solubility of Al.
%K variable charge soil
%K low molecular weight organic acid
%K adsorption of fluoride<br>低分子量有机酸
%K 吸附
%K 氟
%K 可变电荷土壤
%K 土壤污染
%K 治理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=E535519E057CC004&yid=D43C4A19B2EE3C0A&vid=EA389574707BDED3&iid=38B194292C032A66&sid=EB58C3052341AAA3&eid=8CCD0401CC9AE432&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=4&reference_num=7