Author:
Chergui Ahmed,Madjene Farid,Trari Mohamed,Khouider Ali
Abstract
Abstract
Ni2+ is a highly toxic above 0.07 mg/L and its removal is of high significance. The biosorption of Ni2+ onto medlar male flowers (MMF) was studied in relation with the physical parameters like pH, contact time, biosorbent dosage, Ni2+ concentration and temperature. The interaction biosorbent-Ni2+ was examined by the FTIR technique. The equilibrium was achieved within 40 min and the data were well fitted by the Langmuir and Redlich-Peterson (R-P) models. The maximum Ni2+ uptake capacity was 17.073 mg/g at 25°C and the Ni2+ removal follows a pseudo-second order kinetic with activation energy of 13.3 kJ/mol. The thermodynamic parameters: ΔS°, ΔH° and ΔG° showed that the biosorption was spontaneous and endothermic. MMF was used as a post treatment technique and the biosorption was coupled with the visible light driven Ni2+ reduction over the spinel ZnMn2O4. The effect of the pH, ZnMn2O4 loading and light intensity on the photoactivity was investigated. 77.5% of Ni2+ was reduced after ~140 min under optimal conditions. The Ni2+ removal reached a rate conversion of 96% of with the coupled system biosorption/photocatalysis is very promising for the water treatment.
Publisher
Springer Science and Business Media LLC
Subject
Health, Toxicology and Mutagenesis,Public Health, Environmental and Occupational Health,Pollution,Waste Management and Disposal,Water Science and Technology,Applied Microbiology and Biotechnology,Environmental Engineering
Reference17 articles.
1. Lopez A, Lazaro N, Morales S, Marques AM: Nickel biosorption by free and immobilized cells of pseudomonas fluorescens 4F39: a comparative study. Water Air and Soil Pollutio 2002, 135: 157–172. (16) 10.1023/A:1014706827124
2. Bermúdez YG, Rico ILR, Bermúdez OG, Guibal E: Nickel biosorption using gracilaria caudata and sargassummuticum. Chem Eng J 2011, 166: 122–131. 10.1016/j.cej.2010.10.038
3. Malkoc E, Nuhoglu Y: Investigations of nickel(II) removal from aqueous solutions using tea factory waste. J Hazard Mater 2005, 127: 120–128. 10.1016/j.jhazmat.2005.06.030
4. WHO: Nickel in drinking-water. Background document for development of WHO guidelines for drinking-water quality. 4th edition. Geneva, Switzerland: World Health Organization; 2011.
5. Aksu Z, Acıkel U, Kabasakal E, Tezer S: Equilibrium modeling of individual and simultaneous biosorption of chromium(VI) and nickel(II) onto dried activated sludge. Water Res 2002, 36: 3063–3073. 10.1016/S0043-1354(01)00530-9
Cited by
13 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献