摘要
渗透性反应壁(permeable reactive barrier,PRB)现已被广泛用来治理酸性采矿废水.寻求高效的有机反应填料是运用渗透性反应壁技术的关键.采用批式吸附实验和批式微生物培养实验研究了城市污水处理厂的消化污泥作为渗透性反应壁有机填料的可行性.批式吸附实验结果表明,污泥对Zn2+和Cd2+具有较强的吸附能力,最大吸附量分别为13.62mg·g-1和15.60mg·g-1.在批式微生物培养实验中,SO24-浓度从实验初期700mg·L-1左右下降到结束时的300mg·L-1以下,去除率为60%～70%;Fe和重金属污染物(Zn、Cd)都得到了完全去除.结果表明,污泥是一种合适的渗透性反应壁填料.
Permeable reactive barriers （PRB） have been used widely as an alternative technique to treatment of acid mine drainage （AMD）. Selection of the appropriate filling materials is the most important procedure to application of this treatment. Batch adsorption tests and bacteria culture batch tests were conducted to assess the possibility of sewage sludge served as filling material for PRB. Results from batch adsorption tests showed that the maximum adsorption capacities of the sewage sludge were 13. 62 mg·g ^-1（Zn2^ ＋ ） and 15. 60 mg·g ^-1 （ Cd^2＋ ）. Bacteria culture batch tests indicated that SO42 -concentrations in reactors decreased from initial concentrations of 700 mg·L ^-1 to below 300 mg·L ^-1. Sulfate removal efficiency ranged from 60% to 70% . Fe and heavy metals, including Zn and Cd,were removed completely in two reactors. This study suggested that sewage sludge is a suitable filling material for PRB.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2010年第5期1280-1286,共7页
Environmental Science
基金
国家自然科学基金项目(50678075)
关键词
酸性采矿废水
渗透性反应壁
污泥
填料
重金属
acid mine drainage （AMD）
permeable reactive barrier （PRB）
sewage sludge
filling material
heavy metals
