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- W2914610003 abstract "Coal fly ash samples from different power plants of India have been collected and studied for their rare earth content and recovery. These samples were dissolved in nitric acid by (1) acid-digestion method and (2) by fusion with NaOH + NaNO3 mixture at 600 °C followed by successive hydrothermal treatment of the fused mass. The analysis of major and trace elements was done by ICP-AES.All the samples have similar element distribution with total rare earth content found in the range of 300 to 500 mg/kg and major elements as silicon, aluminum, iron, calcium and magnesium. Separation of bulk of the rare earth from matrix elements were carried out by using TEHDGA (N,N,N′,N′-tetrakis-2-ethylhexyldiglycolamide) impregnated XAD-7 resin. Quantitative separation of rare earth was obtained with no uptake of major elements. Simulated solution containing La, Nd, Y and Er, representing lighter and heavier rare earth, was prepared and studied for their adsorption behavior. The adsorption isotherm fitted well with Langmuir modelindicating monolayer adsorption of rare earth elements. Desorption of loaded rare earth elements was achieved by elution with 0.01 M nitric acid solution. The resin was recycled for 10 times and found to retain its extraction and elution properties." @default.
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- W2914610003 date "2019-05-01" @default.
- W2914610003 modified "2023-10-02" @default.
- W2914610003 title "Recovery of rare earth elements from coal fly ash using TEHDGA impregnated resin" @default.
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- W2914610003 doi "https://doi.org/10.1016/j.hydromet.2019.02.005" @default.
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