title: Treatment of industrial wastewater containing Congo Red and Naphthol Green B using low-cost adsorbent.
abstract: The present work investigates the potential use of metal hydroxides sludge (MHS) generated from hot dipping galvanizing plant for adsorption of Congo Red and Naphthol Green B dyes from aqueous solutions. Characterization of MHS included infrared and X-ray fluorescence analysis. The effect of shaking time, initial dye concentration, temperature, adsorbent dosage and pH has been investigated. The results of adsorption experiments indicate that the maximum capacity of Congo Red and Naphthol Green B dyes at equilibrium (q(e)) and percentage of removal at pH 6 are 40 mg/g, 93 %, and 10 mg/g, 52 %, respectively. Some kinetic models were used to illustrate the adsorption process of Congo Red and Naphthol Green B dyes using MHS waste. Thermodynamic parameters such as (ΔG, ΔS, and ΔH) were also determined.
authors.affiliation: Hot Laboratories and Waste Management Center, Atomic Energy Authority, PO 13759, Abu Zaabal, Cairo, Egypt. mohamedfathy_79@yahoo.com
authors.forename: M F
authors.initials: MF
authors.lastname: Attallah
authors.forename: I M
authors.initials: IM
authors.lastname: Ahmed
authors.forename: Mostafa M
authors.initials: MM
authors.lastname: Hamed
mesh_terms: D000327:Adsorption; D004396:Coloring Agents / Q000737:chemistry*; D003224:Congo Red / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007700:Kinetics; D008962:Models, Theoretical; D009282:Naphthalenesulfonates / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000191:economics / Q000379:methods*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D003224:Congo Red; D005290:Ferric Compounds; D007220:Industrial Waste; D009282:Naphthalenesulfonates; D062065:Wastewater; D014874:Water Pollutants, Chemical; C574940:naphthol green B