Electrokinetic Removal of As from Soil Washing Residue
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 m...
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| Veröffentlicht in: | Water, air, and soil pollution air, and soil pollution, 2016-07, Vol.227 (7), p.1, Article 223 |
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| creator | Shin, Su-Yeon Park, Sang-Min Baek, Kitae |
| description | 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. |
| doi_str_mv | 10.1007/s11270-016-2918-8 |
| format | Article |
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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.</description><identifier>ISSN: 0049-6979</identifier><identifier>EISSN: 1573-2932</identifier><identifier>DOI: 10.1007/s11270-016-2918-8</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>Acids ; Analysis ; Arsenic ; Arsenic removal ; Atmospheric Protection/Air Quality Control/Air Pollution ; Chelating agents ; Climate Change/Climate Change Impacts ; Earth and Environmental Science ; Efficiency ; Electrolytes ; Environment ; Environmental monitoring ; Hydrogeology ; Hypotheses ; Medical screening ; Moisture content ; Organic acids ; Oxalates ; Oxalic acid ; Permeability ; Pollution control ; Sodium hydroxide ; Soil contaminants ; Soil contamination ; Soil Science & Conservation ; Studies ; Water Quality/Water Pollution</subject><ispartof>Water, air, and soil pollution, 2016-07, Vol.227 (7), p.1, Article 223</ispartof><rights>Springer International Publishing Switzerland 2016</rights><rights>COPYRIGHT 2016 Springer</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c383t-1e0911256df0facb9739490f7381911efd27905227c2ceb29d7758953e4631153</citedby><cites>FETCH-LOGICAL-c383t-1e0911256df0facb9739490f7381911efd27905227c2ceb29d7758953e4631153</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11270-016-2918-8$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11270-016-2918-8$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Shin, Su-Yeon</creatorcontrib><creatorcontrib>Park, Sang-Min</creatorcontrib><creatorcontrib>Baek, Kitae</creatorcontrib><title>Electrokinetic Removal of As from Soil Washing Residue</title><title>Water, air, and soil pollution</title><addtitle>Water Air Soil Pollut</addtitle><description>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.</description><subject>Acids</subject><subject>Analysis</subject><subject>Arsenic</subject><subject>Arsenic removal</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Chelating agents</subject><subject>Climate Change/Climate Change Impacts</subject><subject>Earth and Environmental Science</subject><subject>Efficiency</subject><subject>Electrolytes</subject><subject>Environment</subject><subject>Environmental monitoring</subject><subject>Hydrogeology</subject><subject>Hypotheses</subject><subject>Medical screening</subject><subject>Moisture content</subject><subject>Organic acids</subject><subject>Oxalates</subject><subject>Oxalic acid</subject><subject>Permeability</subject><subject>Pollution control</subject><subject>Sodium hydroxide</subject><subject>Soil contaminants</subject><subject>Soil contamination</subject><subject>Soil Science & 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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.</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s11270-016-2918-8</doi></addata></record> |
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| ispartof | Water, air, and soil pollution, 2016-07, Vol.227 (7), p.1, Article 223 |
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| subjects | Acids Analysis Arsenic Arsenic removal Atmospheric Protection/Air Quality Control/Air Pollution Chelating agents Climate Change/Climate Change Impacts Earth and Environmental Science Efficiency Electrolytes Environment Environmental monitoring Hydrogeology Hypotheses Medical screening Moisture content Organic acids Oxalates Oxalic acid Permeability Pollution control Sodium hydroxide Soil contaminants Soil contamination Soil Science & Conservation Studies Water Quality/Water Pollution |
| title | Electrokinetic Removal of As from Soil Washing Residue |
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