Reduction of Cr(VI) from Drinking Water by Ferrous Sulfate

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Drinking Water Reduction of bromate by ferrous sulfate reduction. was studied using water plant filter effluent spiked with bromate.  Drinking water advantages face the challenge of consign incline water quality concerns to ensure sufficient protection of public health, some-times without final federal or state drinking water regulations. Total Chromium, i.e., trivalent chromium [Cr(III)] plus hexavalent chromium [Cr(VI)], has been regulated by national drinking water regulations since 1975. The federal regulatory maximum contaminant level (MCL). Although no federal limit has been established for Cr(VI) in drinking water, California's department of health services has a mandate by state law to established by the establishsed by the state in 1999. Removal of residue total iron by GAC was also studied. Results showed that, when initial bromate concentration is about 25 mug/L, pH is 7.2, DO concentration is 2.3 mg/L, temperature is (25plusmn1)degC, the concentration of bromate can be reduced to 8.6 mug/L at FeSO4 dosage of 20 mg/L, which is satisfying with the water quality standard. This research was conducted to investigate the treatment of hexavalent chromium (Cr(VI)) by iron powder (Fe(0)) columns of simulated permeable reactive barriers with and without calcium carbonate (CaCO3). Two columns filled with Fe(0) were used as Cr(VI) removal equipment running at a flow velocity of 10 ml/min at room temperature.
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