Effect of long-term urban wastewater irrigation on heavy metal contamination of soils under conditions of Egypt.

摘要

This study established that with waste water irrigation of maize on alluvial and gray-brown desert soils in Egypt, the total content of heavy metals and their mobile compounds increases. However, the content of Zn, Cu, Ni, and Co did not exceed the maximum allowable concentration. Further, Cd and Pb exceeded the maximum allowable concentration during long-term waste water irrigation of alluvial soils. Irrigation with ground, river, and waste waters for 3 years did not lead to considerable heavy metal contamination of soils.Notes translated from Doklady Rossiiskoi Akademii Sel'skokhozyaistvennykh Nauk (2010) No. 6, 42-43 (Ru)