作　　者： ; ; ; ; ; (林锦眉）;

机构地区： 华南理工大学化学与化工学院

出　　处： 《硅酸盐学报》 2005年第5期621-626,共6页

摘　　要： 研究了Blaine比表面积分别为426m2/kg和836m2/kg的2种高炉矿渣细粉S4和S8对铬(VI)离子的还原固化作用。结果表明:在含铬(VI)水溶液和粉煤灰硬化体中掺加高炉矿渣细粉后,可以降低水溶液中铬(VI)离子的含量和抑制粉煤灰硬化体中铬(VI)离子的溶出;高炉矿渣细粉的比表面积越大,对铬(VI)离子的还原能力越强。采用硫酸高铈硫酸亚铁溶液氧化还原滴定法可以快速评定高炉矿渣细粉的还原能力,其结果与实际溶出试验结果有很好的对应性。 The reduction and solidification effects of ground blast-furnace slags(GBFS)(S4 and S8), with Blaine specific surface area of 426 m^2/kg and 836 m^2/kg on Cr(VI) were investigated. The results show that the content of Cr(VI) in the solutions and the leaching of Cr (VI) from hardened fly ashes can be reduced by adding GBFS to Cr(VI) aqueous solutions or to fly (ashes). The larger the specific surface area of GBFS is, the stronger the reducibility of GBFS will be. The reducibility of GBFS can be quickly assessed by ceric sulfateferrous sulfate solution titration method. The result of which is well corresponded to that of practical test of the leaching of Cr (VI) from hardened fly ashes.

关 键 词： 高炉矿渣细粉 还原能力评价 六价铬离子 硫酸高铈 硫酸亚铁溶液 氧化还原滴定

领　　域： [环境科学与工程]