铅污染土壤的电动修复实验研究  

Experimental Study on Electrokinetic Remediation of Pb Contaminated Soil

作　　者：万玉山 韩惠 沈梦 温馨 王明新 WAN Yushan;HAN Hui;SHEN Meng;WEN Xin;WANG Mingxin(School of Environmental ＆ Safety Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2018年第6期66-71,共6页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(41641032)

摘　　要：为了提高电动修复Pb污染土壤的效率,通过配制Pb污染土壤,搭建电动修复实验装置,研究电压梯度、修复时间、电解液种类和不同通电方式对电动修复Pb污染土壤中Pb去除率的影响。结果表明:电动修复时间96h,电压梯度从0.5V·cm-1增加至1.0V·cm-1时,总Pb去除率增加11.26%,电压梯度从1.0V·cm-1增加至1.5V·cm-1时,总去除率仅增加2.77%;与电动修复72h相比,运行96h的修复率增加4.31%,总能耗增加20.33%,运行120h的修复率增加6.4%,总能耗却增加了40.22%;与柠檬酸为电解液对比,乙酸组修复率增加12.42%,总耗能增加了42.22%;而盐酸组修复率增加17.66%,总耗能却增加了70.46%;间歇通电和交换电极的通电方式与常规的修复方式相比,总Pb去除率分别上升了8.65%和31.05%,能耗分别降低了58.03%和44.9%。间歇通电、交换电极方向能提高电动修复Pb污染土壤的Pb的去除率,同时降低能耗。In order to improve the efficiency electrokinetic remediation of Pb contaminated soil, we studied the effects of Electric field intensity, repair time, type of electrolyte and different electrified mode on the removal of Pb in polluted soil. The results showed that the total Pb removal rate in creased by 11.26% when the electric field intensity was increased from0.5 V· cm^- 1 to 1.0 V· cm^- 1 after 96 hours of electric repair. When the electric field strength increased from 1.0 V ·cm^- 1 to 1.5 V· cm^- 1, the total removal rate just increased by 2.77%. Compared with the 72 hours of electric repair, the recovery rate of 96 hours operation increased by 4.31%, and the total energy consumptionincreased by 20.33% ; while the repair rate after 120 hours operation increased by 6.4%, the total en ergy consumption increased by 40.22%. Compared with citric acid electrolyte, the acetic acid group＇s repair rate increased 12.42%, and the total energy consumption increased by 42.22%. The rate of re pa by ir in the hydrochloric acid group increased by 17.66%, while the total energy consumption increased 70.46%. Intermittent energization and exchange electrode energization compared with conventional repair methods, the total Pb removal rate increased by 8.65% and 31.05% , energy consumption de creased by 58.03% and 44.9%, respectively. The Intermittent energization and exchange electrode energization of the cathode can improve the removal rate of Pb inpolluted soil and reduce the energy consumption.

关 键 词：PB污染土壤 电动修复 去除率 能耗 

分 类 号：X53[环境科学与工程—环境工程]