Method Of Separation Of Impurities From Silica Sand

An efcient method bining thermal annealing and . 201949attract impurities to the surface of silica grains where they can be easily extracted by partial dissolution in an acid mixture Thus obtained silica was investigated by inductively coupled plasma atomic emission spectrometry ICPAES method Major impurities present in silica sand were Al, K, Fe, Na, Ca, Mg and B Among the new products,