期刊名称：Journal of Applied Sciences and Environmental Management
印刷版ISSN：1119-8362
出版年度：2010
卷号：14
期号：3
DOI：10.4314/jasem.v14i3.61448
语种：English
出版社：Department of Pure & Industrial Chemistry, University of Port Harcourt
摘要：Nitrite and nitrate levels were quantitatively adsorbed to wood-derived activated carbon in aqueous system and the effects of electrolytes investigated in this study using batch sorption process. The data showed that nitrate adsorbed nearly 1.5 times higher than that of nitrite. The adsorption is adequately explained by Freundlich and Langmuir isotherm models (r=0.99) with parameters indicative of a beneficial adsorption.. However, the adsorption is markedly reduced in presence of electrolytes (P 3 PO 4 , CH 3 COONa; 95.5 per cent) and neutral chloride salts (NaCl, MgCl 2 ; 90.4 per cent) compared to those observed in presence of neutral sulfate salts (Na 2 SO 4 , MgSO 2 ; 67.8 per cent) and acidic salts (ZnSO 4 , NaH 2 PO 4 ; 52.2 per cent). Acetic acid increases adsorption of nitrite by about 26 per cent (P
