Competitive adsorption of trace elements in calcareous soils as affected by sewage sludge,poultry manure,and municipal waste compost |
| |
| Authors: | M Jalali A Jalili |
| |
| Institution: | (1) Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran |
| |
| Abstract: | The competitive adsorption of trace elements is a key issue in assessing the mobility of trace elements in calcareous soils
and can be affected by disposal of sewage sludge, municipal waste, and poultry manure. The effect of municipal sewage sludge,
poultry manure, and municipal waste compost on the sorption of cadmium (Cd), copper (Cu), zinc (Zn), and nickel (Ni) in surface
samples of three calcareous soils was studied. As the applied concentrations increased, Cu and Cd adsorption increased, while
Zn and Ni adsorption decreased in all treatments. Based on the distribution coefficient (K
d) values and proportion of increase or decrease in metal adsorption, the selectivity sequence in control and amended soils
found was Cu ≫ Cd ≫ Ni > Zn and Cu ≫ Cd ≫ Zn > Ni, respectively. In general, among control and amended soils, control soils
showed the highest K
d for Cd, Cu, and Ni, while sludge, poultry manure, and composted waste-amended soils had lowest K
d for Cd, Cu, and Ni, respectively. In the case of Zn, composted waste-amended and control soils had highest and lowest K
d, respectively. The present experimental results indicated that the addition of organic amendments to these calcareous soils
reduced the sorption of Cd, Cu, and Ni. Thus, the effects of preferential adsorption and organic matter should be considered
in assessing the risk associated with applying sewage sludge, poultry manure, and composted material to calcareous soils. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
