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Table 4 Concentrations of some heavy metals in the studied water samples used in irrigation in (mg L−1)

From: Effect of contamination sources on the rate of zinc, copper and nickel release from various soil ecosystems

Location Cd Pb Mn As Cr Zn Ni Cu
Safe levela 0.01 5.00 0.20 0.05 0.01 2.00 0.20 0.20
NW(El-Kalubia) 0.01 0.02 0.01
Kombora 0.33 0.46 9.51 0.7 2.49 0.12
Abo Rawash 0.35 0.43 12.85 1.08 2.35 0.12
Kafr-Elsheikh 0.35 0.43 12.85 1.08 2.35 0.12
  1. aAccording to ATSDR (1993)