%0 Journal Article
%T Removal effects of citric acid, oxalic acid and acetic acid on Cd, Pb, Cu and Zn in sewage sludge.<br>柠檬酸、草酸和乙酸对污泥中镉、铅、铜和锌的去除效果
%A HUANG Liang
%A ZHOU Qi-xing
%A ZHANG Qian-ru
%A <br>黄亮
%A 周启星
%A 张倩茹
%J 应用生态学报
%D 2008
%I 
%X This paper studied the effects of applying citric acid, oxalic acid and acetic acid on the removal of heavy metals Cd, Pb, Cu and Zn from sewage sludge, and the form transformation and bioavailability of these heavy metals before and after the application of tested organic acids. The results showed that the removal rates of tested heavy metals except Cu increased with increasing acid concentration and action time. Among the tested organic acids, citric acid was more effective in removing heavy metals from sewage sludge, with the removal rate of 52.0% for Pb and 74.2% for Zn after a 7-hour action, and 76.0% for Pb and 92.5% for Zn after 24-hour action. The removal rates of the heavy metals by oxalic acid and acetic acid were relatively low. The Pb and Zn removed by citric acid were mainly in stable form, resulting in a relative increase of their unstable and exchangeable forms in the sludge. Though the removal rate of Cu and Cd was lower, their exchangeable forms still had somewhat increase after the action of tested organic acids.
%K 污泥
%K 有机酸
%K 重金属
%K 形态转化
%K 去除效果
%K 柠檬酸
%K 草酸
%K 乙酸
%K 污泥
%K 去除效果
%K citric
%K acid
%K effects
%K Removal
%K acetic
%K acid
%K 重金属浓度
%K 溶液反应
%K 有机酸
%K 程度
%K 可交换态
%K 比例
%K 不稳定态
%K 存在
%K 去除率
%K 酸浓度
%K 反应时间
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=CD205113A008526B0F8CB5249D4C4791&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=9A596D09E9486F3E&eid=6C62BFE34266FA92&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=23