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Study of heavy metal removal from heavy metal mixture using the CCD method
S. Demim,N. Drouiche,A. Aouabed,T. Benayad,M. Couderchet,S. Semsari 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
The central composite design (CCD) technique was used to study the effect of the native species Lemnagibba on the removal heavy metals from the mixture of heavy metals, and understand their impact on theprocess. The effects of Cd, Cr, Cu, Zn, and Ni cations, incubation period and fronds number on heavymetals removal (Cd, Cr, Cu, Zn, and Ni) were studied, and the results were statistically analyzed using JMP9.0.2 (SAS Institute) software. The analysis aimed at giving a mathematical model that shows theinfluence of each variable. Each factor has a distinct effect on heavy metal removal. High correlation wasfound between the experimental and predicted results, reflected by R2 (coefficient of determination).
Kinetic study of the adsorption of textile dyes on synthetic hydroxyapatite in aqueous solution
W. Lemlikchi,N. Drouiche,N. Belaicha,N. Oubagha,B. Baaziz,M.O. Mecherri 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
Textile mill effluent present a high pollution potential and health risk. These effluents require priortreatment before being discharged back into the environment. The objective of this study was toeliminate three textile dyes viz. the Blue Hydron (HB), the Blue Solophenyl (SB) and the TurquoiseSolophenyl (ST) by adsorption vs. Co-precipitation on hydroxyapatite (HAP) in batch mode at neutral pHand room temperature. Structural and morphological characterization was performed using FTIR andSEM analyses. The results show that the adsorption capacity is higher for the Hydron Blue (HB) comparedto Solophenyl Blue (SB) which is lower than the adsorption capacity of Solophenyl Turquoise (ST). Theequilibrium data fit well to the Freundlich isotherm.
Chitin oligomers and monomers production by coupling g radiation and enzymatic hydrolysis
M. Dziril,H. Grib,H. Laribi-Habchi,N. Drouiche,N. Abdi,H. Lounici,A. Pauss,N. Mameri 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
The main purpose of this study was the chitin enzymatic hydrolysis enhancement by a pretreatment, consisting of chitin exposure to gamma radiation at several doses, ranging from 15 kGy to 210 kGy. The solid chitin molecular weight reduction achieved by Co-60 gamma rays treatment reached a 90% rate at the t used, with a dose of 210 kGy. The partial depolymerization of chitin was realized by irradiation allowing an enzyme affinity increase toward this substrate. The monomers and oligomers obtained from their radiated chitin production rate were almost 100%. It was also demonstrated that the NAG production by enzymatic hydrolysis of irradiated chitin at 210 Gy follows Michaelis–Menton kinetics.