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Gehan M. Nabil,Mohamed E. Mahmoud,Nabila M. El-Mallah 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
Activated carbon-immobilized-cationic surfactant (AC-CS) was designed to enhance the decolorizationbehavior of reactive black 5 (RB5), as an anionic dye, from aqueous and industrial wastewater samples inpresence of various controlling experimental conditions. Experimental data indicated that the dyeadsorption capacity by (AC-CS) was higher in strongly acidic and basic solutions. An anion exchange andion–ion interaction mechanisms were proposed in the acidic solution, while only anion exchangemechanism was suggested in the basic aqueous solution. The adsorption behavior and thermodynamicparameters were also evaluated. Treatments of textile industrial wastewater and real water samples weresuccessfully established (95.23–100.00%).
Mohamed E. Mahmoud,Gehan M. Nabil,Nabila M. El-Mallah,Heba I. Bassiouny,Sandeep Kumar,Tarek M. Abdel-Fattah 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
A method is described for efficient decolorization of reactive red 195 A dye (RR-195A) from aqueous andwastewater samples using modified Switchgrass Biochar (SB) by tetradecyltrimethyl ammoniumbromide (TTAB) as a cationic surfactant for the formation of a novel SB-TTAB adsorbent. The differentcontrolling experimental conditions such as solution pH, initial dye concentration, contact time,adsorbent mass, interfering ions and temperature have been investigated and optimized. Adsorptionequilibrium using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D–R) isotherm modelshave been also studied and the best fit was related to the Langmuir adsorption isotherm. Adsorptionkinetics have been tested and illustrated using pseudo first-order, pseudo-second-order, intraparticlediffusion and Elovich models. The collected results confirmed that the pseudo-second order kineticmodel exhibited the best fit with the experimental data. Thermodynamic parameters were calculatedand the results referred to an exothermic nature and spontaneity of the adsorption process. Improveddecolorization of reactive red 195 A dye from textile industrial wastewater and other water sampleswere successfully established. Excellent recovery values of RR-195A dye by SB-TTAB adsorbent weredetermined in the ranges of 96.61–98.76%, 97.79–99.26%, 94.24–100.0% and 90.98–92.96% ( 1.0–4.0%)from tap water, raw water, wastewater and sea water, respectively