Removal of phosphate from agricultural soil by electrokinetic remediation with iron electrode |
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Authors: | Jeong-Hee Choi Sundaram Maruthamuthu Hyun-Goo Lee Tae-Hyun Ha Jeong-Hyo Bae Akram N Alshawabkeh |
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Affiliation: | (1) Smart Power Facility Research Center, Smart Grid Research Division, Korea Electrotechnology Research Institute, 70 Boolmosangil, Changwon, 641-120, Korea;(2) Corrosion Protection Division, Central Electrochemical Research Institute, Karaikudi, 630 006, India;(3) Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115-5000, USA; |
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Abstract: | Phosphorus is considered the limiting nutrient in eutrophication of agricultural soil in Korea. This study evaluates the coupled
application of electrokinetic process by iron and titanium electrodes for removal of phosphate from agricultural soils. Experiments
were conducted to evaluate phosphate removal under the following conditions: (I) control; (II) 1% starch addition in the soil
without EK; (III) 1% starch addition at the anolyte using a cast iron anode and a carbon cathode; (IV) no starch addition
using a cast iron anode and a carbon cathode, and; (V) 1% starch at the anolyte using a titanium anode and a carbon cathode.
When an iron anode was used under 0.5, 1.0 and 2.0 V/cm, the removal of phosphate was significant at 2 V/cm. The addition
of starch also helps to remove nitrate significantly using an iron electrode. The results reveal that iron electrodes result
in significantly more removal compared to titanium electrodes. |
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