Desorption of Cadmium from Soils Enchanced by Citric Acid

Abstract:

Cadmium contamination of soil has become a major environmental problem in the whole world. Soil washing is a possible remediation method for extracting contaminants from the contaminated soil. Natural organic acids seem to be promising environmentally friendly for removing toxic metals from soils. Batch soil-washing experiments were conducted to investigate the behavior of cadmium desorption from soils by citric acid. Results showed that cadmium removal by citric acid was highly dependent on the initial pH and the concentration of citric acid. The removal of cadmium declined sharply with the rise of pH. Contrarily, cadmium desorption increased with increasing citric acid concentration. More than 90% cadmium was extracted from soil by 80 mmol L-1 citric acid.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 235-238
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.235
• Online since: December 2012
• Authors: Yu Shuang Li, Xiao Jun Hu, Xue Ying Song
• Keywords: Cadmium (Cd), Citric Acid (CA), Contaminated Soil, Desorption

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