At.Spectrosc. 2020 DOI: 10.46770/as.2020.183 View full text
A.C. Sahayam, G. Venkateswarlu, S. Thangavela

Abstract: Leaching of gallium (Ga) from coal fly ash, alumina and sediment is reported for its determination by inductively coupled plasma optical emission spectrometry (ICP-OES). A mixture of acids (H2SO4, HNO3 and HF) was used for the leaching process which was carried out overnight at room temperature or heated for 1 h on a hot plate. HF is essential for the quantitative recovery of Ga from coal fly ash. Leaching with either HCl or HNO3 in combination with HF also yielded quantitative recoveries of Ga from coal fly a…

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