摘要
煤系硫铁矿中所含的FeS2在水中氧化分解的Fe2+将废水中的Cr6+还原为Cr3+;煤系硫铁矿中所含的C对Cr6+具有较好的吸附、还原作用,从而表现出对含铬(Ⅵ)废水具有较好的净化作用.在处理含铬(Ⅵ)废水过程中,废水的pH值、反应时间、煤系硫铁矿粒度、加入量对六价铬的去除率影响较大;煤系硫铁矿对含铬(Ⅵ)废水的吸附行为符合Langmui等温方程.煤系硫铁矿在350～400℃下加热处理后对六价铬的去除效果明显提高,且反应速度加快.
FeS_(2 ) contained in pyrites in coal can decompose to produce Fe^(2+) in water, which can deoxidize Cr(Ⅵ) to Cr(Ⅲ) in wastewater. C contained in pyrites in coal processes has better sorption and deoxidization function. While in treating wastewater containing Cr(Ⅵ), the effect of remove rate of some factors on Cr (Ⅵ) is bigger,such as reacting time, the pH value of wastewater, granularity of FeS_(2) mineral, added amount etc; the sorption the pyrites in coal for wastewater containing Cr (Ⅵ) accord with Langmui isotherm equation. Having been heating treated at 350～400 ℃,the effect of the remove rate of wastewater containing Cr (Ⅵ)of pyrites in coal is better and, its reacting speed is very quick yet.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2004年第4期434-438,共5页
Journal of China Coal Society
基金
洛阳市科学技术委员会基金资助项目(030532)
