Pervious concrete reactive barrier for removal of heavy metals from acid mine drainage − column study

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• 作者：Ayanda N. Shabalala^a ; ^{Ayanda.Shabalala@ump.ac.za} ; ^{Shabalala203@gmail.com} ; Stephen O. Ekolu^a ; Souleymane Diop^b ; Fitsum Solomon^a
• 关键词：Pervious concrete ; Permeable reactive barrier ; Acid mine drainage ; Column studies ; Geochemical modelling
• 刊名：Journal of Hazardous Materials
• 出版年：2017
• 出版时间：5 February 2017
• 年：2017
• 卷：323
• 期：part_PB
• 页码：641-653
• 全文大小：4052 K
• 卷排序：323

文摘

Pervious concrete raises the low pH of acid mine drainage up to 12; heavy metals precipitate. Pervious concrete successfully removed greater than 99% of inorganic contaminants. Ca(OH)2 in pervious concrete reacts with SO42− in acid mine drainage to form expansive gypsum. Incorporating fly ash into pervious concrete mitigates damage caused by gypsum. Pervious concrete reactive barrier offers a promising alternative method for treatment of acid mine drainage.