Separation of silver, mercury, and chromium from the wastes resulting from chemical oxygen demand (COD) analyses
Main Article Content
Because of the concentrated addition of substances (mainly K2Cr2O7, Ag2SO4 , and HgSO4) used in chemical oxygen demand (COD) analyses, the economic value of silver, and the environmental problems caused by chromium and mercury, the present study is aimed at the selective recovery of Cr, Ag, and Hg from the wastes resulting from those analyses. To reach this goal, several mass transfer unit operations were tried out, and several reagents, commonly used in each of such operations, were tested. Among the different procedures used, the precipitation of silver and mercury followed by the adsorption of chromium yielded the best results.
Authors grant the journal and Universidad del Valle the economic rights over accepted manuscripts, but may make any reuse they deem appropriate for professional, educational, academic or scientific reasons, in accordance with the terms of the license granted by the journal to all its articles.
Articles will be published under the Creative Commons 4.0 BY-NC-SA licence (Attribution-NonCommercial-ShareAlike).