Studies On The Distribution Of Heavy Metal Cd
In Contaminated Soils Of Various Particle Sizes
And Removal Efficiencies Of Heavy Metal
Using Acid Washing
Author(s)
S. F. Cheng, C. Y. Huang & L. S. Hsiao
Abstract
Improper treatment and disposal of industrial wastewater and solid wastes result
in serious heavy metal contamination of soil. A commonly used method for
remediation of the soil contaminated by heavy metals is acid washing. This
method is simple in principle, easy to operate and efficient in achieving the
removal of heavy metals.
The experience gained on soil remediation in Taiwan reveals that the soil
particle distribution influences the heavy metal removal efficiency to a large
extent. Hence, in this research, soil samples were collected from the
contaminated sites and used in the investigation on the distribution of heavy
metal Cd in soils of various particle sizes and the efficiencies of acid washing to
remove the Cd from the soil of various particle distributions. The results will be
used for future engineering implementation of the acid washing technique.
The research results indicate that soils containing particles with sizes below
0.150 mm will hold increasing quantities of Cd and organic matter at decreasing
particles sizes. As far as the acid washing efficiency is concerned, smaller
particle diameters and higher organic matter contents result in decreasing
efficiencies.
Keywords: soil, Cd, particle size, CEC, organic matter, acid washing.
Keywords
soil, Cd, particle size, CEC, organic matter, acid washing.
Related Book
Other papers in this volume
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