The process for removing the chromium from the silicon steel plant wastewaters was studied by using waste acid from the steel rolling plant.The main factors affecting chromium removal efficiency such as pH value,reductive agent dosage,reaction time and precipitation time,were investigated.The results showed that both hexavalent chromium and total chromium in the effluent were able to meet with the requirement of the national discharge standard,when the soluation pH value ranges were 2-3 and 8-8^5,respective...
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