Electrokinetic enhanced Phytoremediation of Uranium contaminated Soil using Sunflower and Indian Mustard
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 100mg kg^{-1} UO_{2}, UO_{3}, and UO_{2}(NO_{3})_{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 UO_{3} and UO_{2}(NO_{3})_{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 percent from soils with UO_{3} and uranyl with both plants while that from soil with UO_{2} was 0.7-0.8 percent. Electrokinetic remediation treatment significantly enhanced the U removal efficiency (5-6 percent) from soils with UO_{3}, and uranyl but it was 0.8-1.3 percent from soil with UO_{2}, 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 2020
- Accession Number
- AD1102912
Entities
People
- Charles A. Waggoner
- Fengxiang X. Han
- Jeremy R. White
- Jiangxia Li
- John H. Ballard
- Jun Zhang
- Kai Guo
- Steven L. Larson
- Youhua Ma
- Zikri Arslan
Organizations
- Engineer Research and Development Center