Electrokinetic Removal of As from Soil Washing Residue
| Autor: | Kitae Baek, Su-Yeon Shin, Sang-Min Park |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
021110 strategic
defence & security studies Environmental Engineering Ion exchange Electrokinetic remediation Ecological Modeling Oxalic acid Inorganic chemistry 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Fractionation 010501 environmental sciences 01 natural sciences Pollution chemistry.chemical_compound Electrokinetic phenomena chemistry Environmental Chemistry Chelation Citric acid Arsenic 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water, Air, & Soil Pollution. 227 |
| ISSN: | 1573-2932 0049-6979 |
| DOI: | 10.1007/s11270-016-2918-8 |
| Popis: | In this study, electrokinetic remediation (EKR) was carried out to remove arsenic (As) from soil washing residue. We screened various processing fluids and found that oxalic acid was most effective for As removal because it reductively dissolved Fe and As from the soil. In EKR, however, NaOH was a more effective agent for removing As, implying that the main removal mechanism of As was ion exchange between OH– and oxyanionic As. Oxalic and citric acid, both of which were efficient agents for removing As in the screening tests, did not effectively remove As by EKR, probably due to the relatively high pH and low soil-to-agent ratio. In EKR, As was mainly removed by electromigration toward the anode, even under high amounts of accumulated electro-osmotic flow. Therefore, strategies that increase electromigration have potential for enhancing As removal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink