Skip to main content

Table 9 Cation exchange capacity CEC and exchangeable cations in selected soil samples (meq/100 g)

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

Soil Dominant cations (EDC) Pollutant cations (EPC) ∑EDC ∑EPC CEC*
Na K Ca Mg Cd Pb Mn As Cr Co Zn Ni Cu
Kombora
 UC* 7.61 2.23 7.50 4.27 0.21 0.65 1.74 2.61 7.41 0.44 6.32 0.87 1.53 21.61 21.78 43.39
% exp 17.54 5.14 17.28 9.84 0.48 1.51 4.02 6.03 17.07 1.00 14.56 2.01 3.52    
 Sum% 49.80 50.20    
 C* 6.64 1.17 8.80 5.69 0.22 0.65 1.74 2.61 7.41 0.44 6.32 0.87 1.53 22.30 21.79 44.09
% exp 15.06 2.65 19.96 12.91 0.49 1.48 3.95 5.93 16.80 0.99 14.33 1.98 3.46    
 Sum% 50.60 49.40    
Abo Rawash
 UC* 3.35 0.56 5.61 3.56 0.07 0.29 0.69 1.33 1.21 0.18 0.41 0.34 0.40 13.08 4.92 18.00
 % exp 18.62 3.11 31.19 19.79 0.40 1.60 3.82 7.37 6.73 0.98 2.29 1.89 2.21    
 Sum% 72.67 27.33    
 C* 2. 74 0.42 3.88 1.48 0.05 0.22 1.50 1.01 1.21 0.19 0.37 0.26 0.18 8.52 4.98 13.51
 % exp 0.04 3.90 36.06 13.75 0.45 2.06 13.91 9.37 11.26 1.73 3.45 2.38 1.63    
 Sum% 63.10 36.90    
Kafr-Elsheikh
 UC* 14.60 1.58 3.11 4.16 0.14 0.45 5.76 4.14 3.71 0.56 1.08 1.11 0.30 23.45 17.25 40.70
 % exp 35.87 3.88 7.64 10.22 0.34 1.12 14.16 10.17 9.11 1.37 2.66 2.72 0.73    
 Sum% 57.62 42.38    
 C* 13.81 1.47 3.22 3.35 0.12 0.32 5.14 0.65 4.26 0.62 0.83 0.94 0.31 21.85 13.19 35.04
 % exp 39.45 4.20 9.20 9.57 0.35 0.92 14.68 1.86 12.18 1.78 2.36 2.68 0.88    
 Sum% 62.36 83.64    
  1. *UC uncultivated soil, *C cultivated soil, *CEC calculated cation exchange capacity (meq/100 g), *EDC exchangeable dominant cations (meq/100 g), *EPC exchangeable polluted cations (meq/100 g)