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Table 4

Literature comparison in adsorption performance of Zn2+ and Ni2+ removal with different adsorbents

MetalAdsorbentqmax (mg/g)References
Zn2+ Rice husk ash 14.30 Bhattacharya et al. (2006)  
Zn2+ Palm oil ash 9.57 Chu & Hashim (2002)  
Zn2+ Fly ash 1.3 Bayat (2002)  
Zn2+ RHA/PFA/CFA (composite) 21.74 Present study 
Ni2+ Rice husk ash 14.6 Srivastava et al. (2007)  
Ni2+ Palm oil ash 9.9 Chu & Hashim (2003)  
Ni2+ Fly ash 1.16 Bayat (2002)  
Ni2+ RHA/PFA/CFA (composite) 17.85 Present study 
MetalAdsorbentqmax (mg/g)References
Zn2+ Rice husk ash 14.30 Bhattacharya et al. (2006)  
Zn2+ Palm oil ash 9.57 Chu & Hashim (2002)  
Zn2+ Fly ash 1.3 Bayat (2002)  
Zn2+ RHA/PFA/CFA (composite) 21.74 Present study 
Ni2+ Rice husk ash 14.6 Srivastava et al. (2007)  
Ni2+ Palm oil ash 9.9 Chu & Hashim (2003)  
Ni2+ Fly ash 1.16 Bayat (2002)  
Ni2+ RHA/PFA/CFA (composite) 17.85 Present study 
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