Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 2 | Page No.: 242-247
DOI: 10.3923/jas.2007.242.247
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

The Use of Natural Clay Deposits for Controlling the Hazards of Irrigating Calcareous Soils with Zinc and Cadmium Rich Water

M.I. Al-Wabel

Abstract:
An experiment was conducted to study the effect of adding natural clay deposits to two calcareous soil differ in CaCO3 level and irrigated with metal rich water on the distribution of different chemical forms of, Zn and Cd. The results indicate that the water soluble form of the studying heavy metals was redistributed to other forms by the addition of natural clay deposits. The addition of clay deposits led to a significant decrease in water extractable form of both studied metals. The highest reduction was attained on the addition of 0.6% clay deposits in the two studying soils. This result suggests that the clay minerals in the used deposits have strong effect on decreasing water extractability of both studied metals. However, the other chemical forms (i.e., exchangeable, carbonate, Fe and Mn oxides, organically bond and residual forms of Cd and Zn) were significantly increased with increasing the rate of deposits application for both studied soils. The increased in metal extractability due to clay deposits application leads to using such materials for the isolation of mine wastes with high metallic contents and due to their relatively low hydraulic conductivity and their good sportive characteristics, clay deposits can be used as a physical and chemical barrier too and to impede the dispersion of metals from pollution sources to the surface and ground water bodies. Therefore, the use of clay deposits is a promising tool for a reduction of the water extractability and possibly toxicity of heavy metals in the contaminated soil.
PDF Fulltext XML References Citation Report Citation
How to cite this article:

M.I. Al-Wabel , 2007. The Use of Natural Clay Deposits for Controlling the Hazards of Irrigating Calcareous Soils with Zinc and Cadmium Rich Water. Journal of Applied Sciences, 7: 242-247.

DOI: 10.3923/jas.2007.242.247

URL: https://scialert.net/abstract/?doi=jas.2007.242.247

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

Curve Bottom