摘要
采用粉煤灰处理酸性矿山废水,研究了不同条件下粉煤灰对酸性矿山废水中Fe、Mn、Zn和Cu的去除效果,并对比了粉煤灰对酸性矿山废水及含单一重金属离子溶液中各金属的去除效果。结果表明,当废水中Fe、Mn、Zn和Cu初始质量浓度分别为655.8、362.3、79.4和57.13 mg/L,初始p H值为10,反应温度为25℃时,在300 m L废水中加入15 g粉煤灰,反应60 min后,Fe、Mn、Zn和Cu去除率均达到99.48%以上,废水中Fe、Mn、Zn和Cu残留质量浓度分别为0.06、1.57、0和0.03 mg/L,均低于国家《污水综合排放标准》(GB8978-1996)。粉煤灰处理酸性矿山废水,Zn2+和Cu2+对Fe2+和Mn2+的去除表现出抑制作用,而Fe2+和Mn2+对Zn2+和Cu2+表现出强化去除作用。
Fly ash was used to treat acid mine drainage(AMD) to study the removal of Fe, Mn, Zn and Cu in AMD under different experimental conditions, and the removal rates for metals of both AMD and single solution were compared. The re-sults showed that when the original concentrations of Fe, Mn, Zn and Cu were 655.8, 362.3, 79.4 and 57.13 mg/L, respective-ly in wastewater, the initial p H of AMD was 10, the temperature was 25 ℃, the dosage of fly ash was 15 g in 300 m L wastewater, react time was 60 min, the removal rates of Fe, Mn, Zn and Cu were up to 99.48 %, and the residual Fe, Mn, Zn and Cu were 0.06, 1.57, 0 and 0.03 mg/L, respectively, which were below the Chinese standards of wastewater discharge(GB8978-1996). Compared with single solution, Zn2+and Cu2+can reduce the removal rates of Fe2+and Mn2+in AMD, but Fe2+and Mn2+can increase the removal rates of Zn2+and Cu2+in AMD.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2016年第S1期280-284,共5页
Environmental Science & Technology
基金
益阳市科技计划项目(2014JZ 27)
云浮市产学研结合项目(20149-3)
关键词
酸性矿山废水
粉煤灰
重金属
吸附
acid mine drainage
fly ash
heavy metal
adsorption
