二氧化硫还原废水中六价铬的试验研究

Test Study of Using Sulfur Dioxide to Reduce Chromium in Wastewater

介绍了利用高硫煤燃烧产生的二氧化硫还原废水中的六价铬,使六价铬还原成三价铬的试验。试验结果表明,六价铬的还原率超过99%,还原的速率随含硫量的增加而加快,随溶液pH值的增大而减慢。

This paper describes the test of usin g sulfur diox-ide produced during combustion of high-sulfur coal to reduce six-v a-lence chromium in wastewater into trivalent chromium. Test results showed tha t the reduction rate of six-valence chromium exceeds 90%, the reduction rate ac celerates with the increases of sulfur content and slows down with the increase of pH value in solution.