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  • 1
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    Factorial experimental design for the optimization of catalytic degradation of malachite green dye in aqueous solution by Fenton process (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: September 2016 Source: Water Resources and Industry, Volume 15 Author(s): A. Elhalil, H. Tounsadi, R. Elmoubarki, F.Z. Mahjoubi, M. Farnane, M. Sadiq, M. Abdennouri, S. Qourzal, N. Barka This work focuses on the optimization of the catalytic degradation of malachite green dye (MG) by Fenton process “Fe 2+ /H 2 O 2 ”. A 2 4 full factorial experimental design was used to evaluate the effects of four factors considered in the optimization of the oxidative process: concentration of MG (X 1 ), concentration of Fe 2+ (X 2 ), concentration of H 2 O 2 (X 3 ) and temperature (X 4 ). Individual and interaction effects of the factors that influenced the percentage of dye degradation were tested. The effect of interactions between the four parameters shows that there is a dependency between concentration of MG and concentration of Fe 2+ ; concentration of Fe 2+ and concentration of H 2 O 2 , expressed by the great values of the coefficient of interaction. The analysis of variance proved that, the concentration of MG, the concentration of Fe 2+ and the concentration of H 2 O 2 have an influence on the catalytic degradation while it is not the case for the temperature. In the optimization, the great dependence between observed and predicted degradation efficiency, the correlation coefficient for the model (R 2 =0.986) and the important value of F-ratio proved the validity of the model. The optimum degradation efficiency of malachite green was 93.83%, when the operational parameters were malachite green concentration of 10 mg/L, Fe 2+ concentration of 10 mM, H 2 O 2 concentration of 25.6 mM and temperature of 40 °C. Graphical abstract
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 2
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    Special issue contents page (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: June 2016 Source: Water Resources and Industry, Volume 14
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 3
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    Water and detergent recovery from rinsing water in an industrial environment (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: June 2016 Source: Water Resources and Industry, Volume 14 Author(s): Eddy Linclau, Johan Ceulemans, Kristien De Sitter, Peter Cauwenberg Wash water streams coming from rinsing of equipment in a detergent production site is in many cases considered as waste. On site treatment in waste water plants is possible but typically requires advanced oxidation process (AOP) technology which uses chemicals and creates a waste sludge. A new treatment approach, based on nanofiltration, has been demonstrated at industrial scale in a detergent production site in China. Wash water could be split into a concentrate stream and water fraction. The concentrate stream contains most of the valuable surfactants and has a value to recycle. The water fraction can easily be polished by MBR to feed cooling towers. As such, this production site does not discharge any process wash water and recovers all resources out of the rinsing water: both chemicals (as surfactants) as the water.
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 4
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    Sequestering heavy metals from wastewater using cow dung (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: March 2016 Source: Water Resources and Industry, Volume 13 Author(s): Adedamola Titi Ojedokun, Olugbenga Solomon Bello The presence of heavy metals (e.g., Zn, Cu, Pb, Ni, Cd, etc.) in aqueous solutions constitutes a major environmental problem. The present work represents a review of the recently published literature discussing the use of cow dung as adsorbent for the removal of metal ions from aqueous solution using batch experiments. The potential health and environmental hazards of metal ions in addition to the kinetic and isothermal models usually assessed to fit the biosorption experimental data were also reviewed. Conclusively, it was established that the use of cow dung is a promising adsorbent in the removal of heavy metals from waste waters and environment.
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 5
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    Application of Taguchi method for optimizing the process parameters for the removal of copper and nickel by growing Aspergillus sp. (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: Available online 16 May 2016 Source: Water Resources and Industry Author(s): Reena Pundir, G.H.V.C. Chary, M.G. Dastidar In the present study, the process parameters affecting biosorption were optimized by adopting Analysis of Mean (ANOM) approach for maximizing the percentage removal of copper and nickel by growing Aspergillus sp. in batch reactor using Taguchi method. The process parameters include inoculum concentration, initial metal concentration, pH and temperature. The optimized conditions were found to be 15% v/v inoculum concentration, 50 mg l −1 concentration of copper/nickel, pH 4 and temperature 30 °C. The percentage contribution of each process parameter on the removal of copper/nickel determined using Analysis of Variance (ANOVA) method followed the order: concentration of copper/nickel>inoculum concentration>pH>temperature. The percentage removal of copper and nickel realized in the confirmatory experiments carried out at optimized conditions was found to be higher than that obtained in all the test runs of Taguchi design, thereby supporting the accuracy of optimization of process parameters under the given set of experimental conditions.
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 6
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    Removal of methylene blue and mechanism on magnetic γ-Fe2O3/SiO2 nanocomposite from aqueous solution (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: September 2016 Source: Water Resources and Industry, Volume 15 Author(s): Dong Chen, Ziyang Zeng, Yubin Zeng, Fan Zhang, Mian Wang Magnetic γ-Fe 2 O 3 /SiO 2 (M-γFS) nanocomposite was prepared using γ-Fe 2 O 3 as the magnetic carriers. M-γFS was characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier Transform infrared spectroscopy (FTIR). The characterizations of M-γFS exhibit the irregular core-shell structure, and SiO 2 has been successfully coated on the surface of γ-Fe 2 O 3 . M-γFS has much higher adsorption capacity 116.09 mg/g calculated by coated SiO 2 on M-γFS than γ-Fe 2 O 3 and SiO 2 , and the alkaline conditions are beneficial to the adsorption of MB. Coexisting cations, ionic strength and humic acid can influence the adsorption capacity. Meanwhile, adsorption kinetics data for M-γFS show good fit to the pseudo-second-order kinetics model, and the Langmuir equation is more appropriate to describe the adsorption behavior of MB on M-γFS. Moreover, after recycling four times, M-γFS washed by ethanol can still keep high adsorption capacity for MB adsorption. Graphical abstract
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 7
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    Kinetics, isotherms and thermodynamic modeling of liquid phase adsorption of Rhodamine B dye onto Raphia hookerie fruit epicarp (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: September 2016 Source: Water Resources and Industry, Volume 15 Author(s): A.A. Inyinbor, F.A. Adekola, G.A. Olatunji Highly efficient low cost adsorbent was prepared from Raphia hookerie fruit epicarp. Characteristics of the prepared low cost adsorbent (RH) was established using scanning electron microscope (SEM), Fourier Transform Infra Red (FTIR) and Brunauer–Emmett–Teller (BET) surface area. RH was applied for Rhodamine B (RhB) uptake from aqueous solution. Equilibrium adsorption data were fitted using four isotherms and kinetic data tested with five kinetic models. The BET surface area obtained was 0.00351 m 2 /g; SEM reveals large pores that could enhance the uptake of large molecules. Freundlich isotherm best described the uptake of RhB onto RH, the maximum monolayer adsorption capacity (q max ) was 666.67 mg/g. Pseudo second order model best described the kinetics of adsorption process. Energy of adsorption (E) obtained from D-R isotherm suggests physical adsorption. Desorption efficiency follows the order H 2 O>HCl>CH 3 COOH. Cost analysis shows that RH is about 1143 times more economical when compared with commercial activated carbon.
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 8
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    Special issue title page (2016)
    Elsevier
    Details
    Publication Date: 2016-10-12
    Description: Publication date: June 2016 Source: Water Resources and Industry, Volume 14
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 9
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    Characterization of effluent from food processing industries and stillage treatment trial with Eichhornia crassipes (Mart.) and Panicum maximum (Jacq.) (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: December 2016 Source: Water Resources and Industry, Volume 16 Author(s): N.A. Noukeu, I. Gouado, R.J. Priso, D. Ndongo, V.D. Taffouo, S.D. Dibong, G.E. Ekodeck In this study, effluents from 11 food processing industries from various sectors were characterized through analysis of physical and chemical parameters. In general, effluents pHs are between 4.07 and 7.63. Lead (Pb 2+ ) and cadmium (Cd + ) concentrations range from 0.083 to 1.025 mg/l and 0.052–0.158 mg/l respectively. The biodegradability of the effluent is very low. The principal component analysis (PCA) grouped industries according to their organic matter levels; thus, stillage, livestock, molasses and sugar refinery effluents show some similarities, as well as confectionery, oil mill, dairy and brewery effluents. Forms of nitrogen measured show low levels of nitrites (NO 2 − ), high levels of nitrates (NO 3 − ), ammonium (NH 4 +) and Kjeldahl nitrogen (TKN). Among these effluents, a treatment trial with Eichhornia crassipes and Panicum maximum was applied to stillage effluent from Fermencam distillery. The results show that Panicum maximum and Eichhornia crassipes reduce pollutant loads of Fermencam's wastewater.
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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  • 10
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    Comparative investigation on the removal of cyanide from aqueous solution using two different bioadsorbents (2016)
    Elsevier
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    Publication Date: 2016-10-12
    Description: Publication date: September 2016 Source: Water Resources and Industry, Volume 15 Author(s): Naveen Dwivedi, Chandrajit Balomajumder, Prasenjit Mondal In the present study, comparative investigation for the bioremoval of cyanide from synthetic aqueous solution by Prunus amygdalus (Almond) shell (PAS) and Tectona grandis (Sagwan) leaves (TGL) powder have been performed as a function of solution pH, bioadsorbent dose, contact time and initial cyanide concentration. The cyanide uptake by PAS and TGL powder has been quantitatively estimated using sorption isotherms. The equilibrium data are best fitted to Freundlich and Langmuir isotherm model for PAS and TGL powder respectively. The monolayer capacity of PAS and TGL powder for cyanide adsorption as calculated by Langmuir isotherm are 32.05 mg/g and 18.45 mg/g respectively. The kinetic data are found to follow closely the pseudo-second order kinetic model for both the bioadsorbents. The present study shows that such low cost materials could be used as efficient bioadsorbents for the removal of cyanide from aqueous solutions.
    Electronic ISSN: 2212-3717
    Topics: Architecture, Civil Engineering, Surveying , Geography , Process Engineering, Biotechnology, Nutrition Technology
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