【摘要】 铬渣中含有毒性较强的六价铬化合物,其严重污染环境。本文通过实验室模拟试验,研究了硫代硫酸钠、亚硫酸钠、抗坏血酸和硫酸亚铁等还原剂对铬渣污染土壤中六价铬的解毒效果。探讨了还原剂的浓度、pH和反应时间对六价铬还原效果的影响。结果表明:亚硫酸钠浓度为1 mol/L、pH 9.5和反应时间为15 min时对六价铬的还原效果最佳。更多还原

【Abstract】 Chromium(VI) contained in chromic slag is one of the most dangerous toxic pollutants.Laboratory simulation tests were conducted to examine the effects of different reducing reagents such as Na2S2O3,Na2SO3,ascorbic acid and FeSO4·7H2O in extracting VI from contaminated soils.The effects of reagent concentration,pH and reaction time on removal efficiency were investigated.The highest removal rate was obtained under the optimal conditions of 1 mol/L Na2SO3 and pH 9.5 for a reaction time of 15 min.更多还原