Treatment of heavily polluted acid mine drainage by means of a multi-component passive system
The treatment of acid mine drainage polluted with radionuclides, heavy metals, arsenic and sulphates by means of a passive system consisting of a permeable reactive mutibarrier ( with alkalizing limestone drain and an anoxic section for microbial sulphate reduction, biosorption and additional chemical neutralization) and a constructed wetland, connected in a series, was very efficient for relatively long periods of time. However, the treatment of waters containing high concentrations of iron, including a portion in the ferrous state, caused serious problems on the efficiency of the cleaning process. These problems were avoided by the pretreatment of the acid waters by a system for iron removal consisting of a unit for bacterial oxidation of the ferrous ions to the ferric state by biofilms of the acidophilic chemolithotrophic bacteria Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans and a unit for precipitation of the ferric ion as a result of chemical neutralization.
acid mine drainage passive water treatment permeable reactive multibarrier constructed wetland
Stoyan Groudev Irena Spasova Marina Nicolova Plamen Georgiev
Department of Engineering Geoecology, University of Mining and Geology,Studentski grad, Sofia 1700, Bulgaria
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
1067-1072
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）