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The results of the treatment of coal fly ash leachates with Fe-Bent under optimized conditions are shown in Table 5.

Table 5

Concentration of As, B, Cr, Mo and Se removed from coal fly ash leachates before and after treatment using Fe-Bent at optimized conditions (DWAF 1996)

ElementsCFA leachatesOptimized conditionDWAF guidelines
As (μg L–153 0.01 100 
B (μg L–11,730 0.03 500 
Cr (μg L–1271 0.01 10 
Mo (μg L–1165 0.03 10 
Se (μg L–1170 0.01 20 
Final pH 11 6–9 
ElementsCFA leachatesOptimized conditionDWAF guidelines
As (μg L–153 0.01 100 
B (μg L–11,730 0.03 500 
Cr (μg L–1271 0.01 10 
Mo (μg L–1165 0.03 10 
Se (μg L–1170 0.01 20 
Final pH 11 6–9 

n = 3.

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