DOI: 10.1016/j.watres.2018.12.052
Scopus记录号: 2-s2.0-85059858269
论文题名: A novel approach to rapidly purify acid mine drainage through chemically forming schwertmannite followed by lime neutralization
作者: Wang X. ; Jiang H. ; Fang D. ; Liang J. ; Zhou L.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 515
结束页码: 522
语种: 英语
英文关键词: Acid mine drainage
; Chemical mineralization
; Lime neutralization
; Schwertmannite
Scopus关键词: Biomineralization
; Drainage
; Iron compounds
; Metal recovery
; Mineralogy
; Sulfur compounds
; Acid mine drainage
; Cyclic reduction
; Environmental consequences
; Global mining industry
; Iron hydroxides
; Metal levels
; Neutralization process
; Schwertmannite
; Lime
; calcium oxide
; ferric ion
; hydrogen peroxide
; iron
; mineral
; schwertmannite
; sulfate
; unclassified drug
; acid mine drainage
; biomineralization
; coating
; hydrogen peroxide
; iron hydroxide
; lime
; mineralization
; mining industry
; neutralization
; schwertmannite
; acid mine drainage
; Article
; biomineralization
; chemical reaction
; concentration (parameter)
; controlled study
; feasibility study
; lime neutralization
; oxidation reduction reaction
; physical chemistry
; powder
; priority journal
; sludge
; surface area
; waste water management
英文摘要: Acid mine drainage (AMD) has been recognized as a major challenge to the global mining industry due to its environmental consequences. Lime neutralization has been a traditional treatment for AMD, but the abundance of iron and sulfate in AMD usually renders it ineffective by forming iron hydroxide and gypsum precipitate coating on the surface of lime. In light of ubiquitous biological mineralization phenomena present at AMD sites, a rapid chemical mineralization was developed to reduce iron and sulfate and recovery of iron from AMD prior to lime neutralization. Through a cyclic reduction-oxidation process by the addition of iron powder and hydrogen peroxide (H 2 O 2 ), over 90% Fe 3+ and 40% SO 4 2− could be removed beforehand by forming schwertmannite. The pretreated AMD drastically reduced both the required lime slurry in the subsequent lime neutralization process and the amount of neutralized sludge. The resultant schwertmannite had a specific surface area of 3.9 m 2 /g and a formula of Fe 8 O 8 (OH) 4·5 (SO 4 ) 1.75 . This technique could reduce lime consumption, increase metal level in neutralized sludge, and harvest environmentally friendly materials. These results demonstrate that the integrated chemical mineralization and lime neutralization treatment is expected to be widely used in practical application. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122028
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
Recommended Citation:
Wang X.,Jiang H.,Fang D.,et al. A novel approach to rapidly purify acid mine drainage through chemically forming schwertmannite followed by lime neutralization[J]. Water Research,2019-01-01