摘要
在粉煤灰中加入少量黄铁矿烧渣和适量固体NaCl,在90℃温度下用稀H2SO4搅拌浸提3h,即制得集物理吸附和化学混凝为一体的粉煤灰基混凝剂。这种混凝剂用于不同工业废水处理,COD去除率在50%—83%之间,色度去除率在89%—98%之间,混凝沉淀速度快,污泥体积小,处理废水费用低.
A fly ash-based coagulant combining the capabilities of both physical adsorption and chemicalcoagulation has been prepared by adding a smallamount of pyrite slag and an appropriate amountof NaCl to fly ash, and then the resulting mixturebeing stirred and extracted with a dilute H2SO4for 3 hours at a temperature of 90℃.The coagulant thus prepared was used to treat various kindsof industrial wastewaters,giving a COD removalof 53% - 83 %, a colourness removal of 89% 98%, a higher rate of settlement, a smaller volume of sludge, and a lower cost of treatment.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1995年第2期47-49,64,共4页
Environmental Science
基金
陕西省环境保护局资助