Commercial sulfuric acid contains iron impurity of about 150-175 ppm, I want to remove it to the level below 2 ppm. Work has been done with cation exchange resin to solve the problem but at the cost of deterioration of resin and loss of sulfuric acid concentration. Moreover, it was found that CNTs/GNFs work well as far as decolourization of the commercial sulfuric acid is concerned but not found effective for iron removal from it.

Researchers are requested to suggest the ways and means for improving the CNTs/GNFs adsorption towards iron removal from sulfuric acid.

Thanks in advance.

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