Effect of Salinity and Sewage Sludge on Heavy Metal Availability And Uptake by Barley Plant

آب و خاک

Article 11, Volume 27, Issue 5, November 2014, Pages 985-997   

Document Type: Research Article

DOI: 10.22067/jsw.v0i0.31262

Authors

A. Falahati Marvast^* ; alireza hosseinpuor; Seyed Hassan Tabatabaei

Abstract

The objective of this study was to evaluate the effect of soil salinity on the availability and uptake of cadmium(Cd), lead(Pb), nickel(Ni), zinc(Zn) and copper(Cu) in a soil treated with municipal sewage sludge (MSS). Soil was salinized (2, 4, 8 and 12 dSm-1 soil paste extract) with NaCl + CaCl2 (1:1ratio), and incubated at soil field capacity (FC) for 1 month. The soil was treated with a 1.5 percent of MSS and incubated again at FC for 1 month. Before planting,soluble and DTPA-TEA extractable of heavy metals and soluble Chloride(Cl-) were determined. Then barley seeds were planted and, plants were harvested 10 weeks after germination. The plant indices (dry weight, heavy metal concentration and heavy metal uptake) were measured. The results showed that all salinity levels significantly increased soluble and availability of Cd, Pb, Ni, Zn and Cu. Soil salinity had a significant effect on concentrations and absorption of Cd and Pb in plant (P

Keywords

Uptake; Clay soil; Heavy metals; salinity; Sewage sludge