Hot Laboratories and Waste Management Center, Atomic Energy Authority, PO 13759, Abu Zaabal, Cairo, Egypt.
Environ Sci Pollut Res Int. 2013 Feb;20(2):1106-16. doi: 10.1007/s11356-012-0947-4. Epub 2012 May 8.
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.
本研究探讨了热浸镀锌厂产生的金属氢氧化物污泥（MHS）在吸附水溶液中的刚果红和萘酚绿 B 染料方面的潜在应用。MHS 的特性包括红外和 X 射线荧光分析。考察了搅拌时间、初始染料浓度、温度、吸附剂用量和 pH 值的影响。吸附实验结果表明，在平衡时（q(e)），MHS 对刚果红和萘酚绿 B 染料的最大吸附容量分别为 40mg/g 和 93%，pH 值为 6 时的去除率分别为 10mg/g 和 52%。使用 MHS 废物吸附刚果红和萘酚绿 B 染料的吸附过程还使用了一些动力学模型进行了说明。还确定了热力学参数（ΔG、ΔS 和 ΔH）。
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