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Received November 26, 2007
Accepted March 18, 2008
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Synthesis and characterization of a novel soil stabilizer based on biodegradable poly(aspartic acid) hydrogel
Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, P.R., China
2006080133@grad.buct.edu.cn
Korean Journal of Chemical Engineering, September 2008, 25(5), 1076-1081(6), 10.1007/s11814-008-0176-1
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Abstract
A novel soil stabilizer based on poly-amino acid - polyaspartic acid (PASP) and its copolymer which modified by xanthan gum (XG) was studied to increase soil particle compressive strength and resistance to wind erosion. Due to its unique property, the stabilizer aggregated individual soil particles and formed crust. The sample compressive strength increased from 0.175 to 0.612MPa and the wind erosion modulus reduced from 22.43 to 10.56 g·m-2·min-1 after the 1% PASP hydrogel was applied by 1.67 Lm-2 (1 cm of crust). The soil water content was higher than the control due to the polymer’s excellent water-retaining property. The polymer had no negative influence on seed germination and growth. The biodegradability experiment showed that PASP was easy to biodegrade and therefore it was safe to apply in the field.
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