Electrokinetic Restoration of Sulfate-Accumulated Saline Greenhouse Soil

Title
Electrokinetic Restoration of Sulfate-Accumulated Saline Greenhouse Soil
Authors
Jung-Min ChoDo-Hyung Kim양중석Kitae Baek
Keywords
Electrokinetic; Electromigration; Nitrate; Saline soil; Sulfate
Issue Date
2011-12
Publisher
CLEAN-SOIL AIR WATER
Citation
VOL 39, NO 12, 1036-1040
Abstract
Electrokinetic (EK) process was performed to restore sulfate-originated saline soil and to evaluate the effect of treatment duration. Sulfate and potassium were the major ionic salts in the saline soil used in this study. A constant voltage gradient of 1 V/cm was applied for 8, 12, and 16 days. After EK treatment, anions and cations were transported toward anode and cathode, respectively, by electromigration. Chloride was completely removed, and 85.6% of nitrate was removed after 8 days of treatment. The increase of treatment period from 8 to 12 days had a negligible effect on the enhancement in the rate of sulfate removal; however, over 70% was removed after16 days. At the end of experiment, the electrical conductivity (EC) of the soil, an indicator of soil salinity, decreased to 1.93 dS/m from an initial value of 5.3 dS/m, and the distribution of sulfate was similar to that of EC. The operation time of 16 days was sufficient to restore the sulfate-originated saline soil using the EK process.
URI
http://pubs.kist.re.kr/handle/201004/41379
ISSN
1863-0650
Appears in Collections:
KIST Publication > Article
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