Electrokinetic-enhanced phytoremediation of uranium-contaminated soil using sunflower and Indian mustard. Issue 12 (15th October 2019)

• Record Type: Journal Article
• Authors: Li, Jiangxia; Zhang, Jun; Larson, Steven L.; Ballard, John H.; Guo, Kai; Arslan, Zikri; Ma, Youhua; Waggoner, Charles A.; White, Jeremy R.; Han, Fengxiang X.
• Is Part Of: International journal of phytoremediation. Volume 21:Issue 12(2019)
• Page Start: 1197
• Page End: 1204
• Publication Date: 2019-10-15
• Subjects: Electrokinetic -- Indian mustard -- phytoremediation -- speciation -- sunflower -- uranium; Phytoremediation -- Periodicals; 628.5
• DOI: 10.1080/15226514.2019.1612847
• Languages: English
• ISSNs: 1522-6514

Abstract

Abstract: Electrokinetic-enhanced phytoremediation is an effective technology to decontaminate heavy metal contaminated soil. In this study, we examined the effects of electrokinetic treatments on plant uptake and bioaccumulation of U from soils with various U sources. Redistribution of uranium in soils as affected by planting and electrokinetic treatments was investigated. The soil was spiked with 100 mg kg –1 UO2, UO3, and UO2 (NO3 )2 . After sunflower and Indian mustard grew for 60 days, 1 voltage of direct-current was applied across the soils for 9 days. The results indicated that U uptake in both plants were significantly enhanced by electrokinetic treatments from soil with UO3 and UO2 (NO3 )2 . U was more accumulated in roots than in shoots. Electrokinetic treatments were effective on lowering soil pH near the anode region. Overall, uranium (U) removal efficiency reached 3.4–4.3% from soils with UO3 and uranyl with both plants while that from soil with UO2 was 0.7–0.8%. Electrokinetic remediation treatment significantly enhanced the U removal efficiency (5–6%) from soils with UO3 and uranyl but it was 0.8–1.3% from soil with UO2, indicating significant effects of U species and electrokinetic enhancement on U bioaccumulation. This study implies the potential feasibility of electrokinetic-enhanced phytoremediation of U soils with sunflower and Indian mustard.