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均匀电场下多环芳烃在土壤中的迁移
  • 期刊名称:农业环境学报
  • 时间:0
  • 页码:-
  • 分类:TU411[建筑科学—岩土工程;建筑科学—土工工程]
  • 作者机构:[1]南开大学环境科学与工程学院,环境污染过程与基准教育部重点实验室,天津300071
  • 相关基金:国家高技术研究发展计划(863)项目(2008AA062333);国家自然科学基金资助项目(20907024);天津市基础研究重点项目(10JczDJc24200);中央高校基本科研业务费专项资金资助
  • 相关项目:电气石-微生物联合修复土壤中多环芳烃污染及其机理研究
中文摘要:

当循环电解液流速为800mL/h,电解液为无菌水时,电渗流流量、菲和芘在土壤中迁移量在电压梯度为1V,cm作用下比电压梯度为0.5V/cm时要多;电动注入表面活性剂Tween80和HPCD均可以提高菲和芘在土壤中的迁移,注人Tween80和HPCD浓度分别为500和1000nqtg/L时,相应地Phe提高5.8倍和11.7倍、芘提高2倍和3.4倍;而BaP裆水中的溶解度太小,电场作用和电动注入表面活性剂对BaP在土壤中的迁移量影响很小。为建立电动修复有机污染物证染提供了技术基础。

英文摘要:

When the experiments were carried out at electrolyte circulation velocity of 800 mL/h and electrolyte using sterile water, the amount of electroosmotic flow and migration mass of phenanthrene and pyrene at the voltage gradient of 1 V/cm was greater than those at the voltage gradient of 0.5 V/era, respectively. Surfactants such as Tween80 and HPCD, can improve the total migration mass of phenanthrene and pyrene. And, the migration of the phenanthrene was elevated by 5.8 and 11.7 by electrokinetic injection of Tween 80 and HPCD at the concentrations of 500 and 1 000 mg/kg, respectively, while pyrene was 2 and 3.4 times. However, the total migration of benzol [a] pyrene was very small due to its solubility, even under the conditions of electric field and electrokinetic injection of surfactants. This study provides technological basis for the set-up of electrokinetic remediation for sites contaminated by organic pollutants.

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