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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.
Baya Palahouane,Nadjib Drouiche,Salaheddine Aoudj,Kenza Bensadok 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-
Electrochemical method was carried out to remove fluoride ions from pretreated photovoltaicwastewater using an electrocoagulation technique, and using aluminum sheets as a working electrode. Distance between electrodes, number of electrodes, pH and current density were determined to beoptimum at 1 cm, 3, 7, and 18.51 A/m2, respectively. An operation cost including sacrificial electrodematerials and electrical energy requirements was also performed for the treatment process. Under theexperimental conditions energy consumption was determined as 0.32 kW h/m3. The results show thatthe electrocoagulation can be applied to photovoltaic wastewater post-treatment.
TOA Estimation Technique for IR-UWB Based on Homogeneity Test
Mustapha Djeddou,Hichem Zeher,Younes Nekachtali,Karim Drouiche 한국전자통신연구원 2013 ETRI Journal Vol.35 No.5
This paper deals with the estimation of the time of arrival (TOA) of ultra-wideband signals under IEEE 802.15.4a channel models. The proposed approach is based on a randomness test and consists of determining whether an autoregressive (AR) process modeling an energy frame is random or not by using a distance to measure the randomness. The proposed method uses a threshold that is derived analytically according to a preset false alarm probability. To highlight the effectiveness of the developed approach, simulation setups as well as real data experiments are conducted to assess the performance of the new TOA estimation algorithm. Thereby, the proposed method is compared with the cell averaging constant false alarm rate technique, the threshold comparison algorithm, and the technique based on maximum energy selection with search back. The obtained results are promising, considering both simulations and collected real-life data.
Leila Bensadallah,Hocine Grib,Nadia Abdi,Nadjib Drouiche,Nabil Mameri 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.41 No.-
Production anti-scorpion serum fraction requires washing water containing important quantities of(NH4)2SO4. This study presents a combination of the ultrafiltration and the electrodialysis to recoverthis salt. The application of ceramic ultrafiltration membrane has helped to reduce pollution due toorganic matter by completely retained the proteins with an apparent rejection coefficient close to unity. The optimum hydrodynamic parameters such as the average transmembrane pressure and tangentialflow rate were determined for ultrafiltration cell. The combination of the UF with the ED allowedconcentrating the NH4SO4 salt with a recovery yield of about 74%.
Valorization of orange industry residues to form a natural coagulant and adsorbent
Maya Kebaili,Souad Djellali,Manelle Radjai,Nadjib Drouiche,Hakim Lounici 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.64 No.-
The availability of by-products released as a result of the fruit processing development is a potential study area highlighting the possibility of valorizing them. This study presents an investigation on the valorization of orange juice factory pith and peel waste in terms of the recovering pectin and an adsorbent WT (Waste Treated). The recovered pectin was used in the removal of turbidity and the formed adsorbent was used for the removal of methylene blue (MB) and indigo carmine (IC) dyes. The pectin yield obtained under extraction conditions (pH 1.5, temperature 80–82 °C and extraction time 60 min) was found to be 16.32% and presenting moisture contain 10%, an ash contains 2.28 and an esterification degree of 65.21. With a dose of 6 mg/l, pectin used alone was able to reduce about 99% of initial turbidity at pH 3 after 30 min of settling time. For the waste recovered after the extraction of the pectin, an absorbance of 70.5% of the MB is obtained compared to 16.34% for IC which shows that our support is perfect to eliminate the cationic dye. Hence, N’GAOUS factory orange waste can be valorized in water treatment as a natural coagulant and adsorbent for water treatment with low environmental risks.
Malika Chenna,Karima Messaoudi,Nadjib Drouiche,Hakim Lounici 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.33 No.-
This work was designed to study the effectiveness of hydrogen peroxide photolysis on the degradation ofmalathion pesticide in an aqueous medium. Experiments were performed in a static reactor with a lowpressuremercury vapor lamp at initial organophosphorus concentrations of 10 3. The first resultobtained showed that the system H2O2/UV can completely oxidize the organophosphorus compound. The oxidation yields obtained using the static reactor depended on the reaction time, the initialconcentration of H2O2, and the initial pH solution. However, the oxidation efficiency may be reduced bythe presence of radical traps in the reaction medium. Moreover, a model of the hydrogen peroxidephotocatalysis is also presented in this paper. The use of experimental design and in particular theresponse surface methodology (RSM) in addition to the full factorial design allowed the determination ofthe influence of the simultaneous effects and interaction of the operating parameters on the performanceof the photo degradation Demim et al. Ecol. Eng. 57 (2013) 302; Ecol. Eng. 61 (2013) 426; Boudjema et al. Desalin. Water Treat. 1065. 10.1080/19443994.2015.449. Indeed, the operating parameters studied inthis research work were the initial concentration of malathion, H2O2 catalyst volume and the pH of thesolution. The results found showed that the application of the RSM allowed describing correctly theeffect of these three operating parameters on the treatment efficacy. The optimal parameter valuesgiving a maximum yield (100%) were determined.
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.