Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 20, Issue 2, Pages 1106-1116Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-012-0947-4
Keywords
Treatment; Industrial wastewater; Congo Red and Naphthol Green B
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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 (Delta G, Delta S, and Delta H) were also determined.
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