Heavy Metal Treatment Using for Agents for Acid Mine Drainage

2008 ◽  
Author(s):  
J. C. Choi
Keyword(s):  
Heavy Metal ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Acid Mine ◽  
Metal Treatment

scholarly journals Recent developments in materials used for the removal of metal ions from acid mine drainage

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Tebogo M. Mokgehle ◽  
Nikita T. Tavengwa
Keyword(s):  
Heavy Metal ◽  
Surface Water ◽  
Acid Mine Drainage ◽  
Metal Ions ◽  
Mine Drainage ◽  
Acid Mine ◽  
Adsorption Capacities ◽  
Ion Imprinted ◽  
Wide Range ◽  
Ion Imprinted Polymers

AbstractAcid mine drainage is the reaction of surface water with sub-surface water located on sulfur bearing rocks, resulting in sulfuric acid. These highly acidic conditions result in leaching of non-biodegradeable heavy metals from rock which then accumulate in flora, posing a significant environmental hazard. Hence, reliable, cost effective remediation techniques are continuously sought after by researchers. A range of materials were examined as adsorbents in the extraction of heavy metal ions from acid mine drainage (AMD). However, these materials generally have moderate to poor adsorption capacities. To address this problem, researchers have recently turned to nano-sized materials to enhance the surface area of the adsorbent when in contact with the heavy metal solution. Lately, there have been developments in studying the surface chemistry of nano-engineered materials during adsorption, which involved alterations in the physical and chemical make-up of nanomaterials. The resultant surface engineered nanomaterials have been proven to show rapid adsorption rates and remarkable adsorption capacities for removal of a wide range of heavy metal contaminants in AMD compared to the unmodified nanomaterials. A brief overview of zeolites as adsorbents and the developent of nanosorbents to modernly applied magnetic sorbents and ion imprinted polymers will be discussed. This work provides researchers with thorough insight into the adsorption mechanism and performance of nanosorbents, and finds common ground between the past, present and future of these versatile materials.

scholarly journals Influence of Monovalent Cations on the Efficiency of Ferrous Ion Oxidation, Total Iron Precipitation, and Adsorptive Removal of Cr(VI) and As(III) in Simulated Acid Mine Drainage with Inoculation of Acidithiobacillus ferrooxidans

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 596 ◽  
Author(s):  
Yongwei Song ◽  
Heru Wang ◽  
Jun Yang ◽  
Yanxiao Cao
Keyword(s):  
Heavy Metal ◽  
Acid Mine Drainage ◽  
Acidithiobacillus Ferrooxidans ◽  
Mine Drainage ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Monovalent Cations ◽  
Iron Minerals ◽  
Acid Mine ◽  
Removal Efficiencies

Acid mine drainage is highly acidic and contains large quantities of Fe and heavy metal elements. Thus, it is important to promote the transformation of Fe into secondary iron minerals that exhibit strong heavy-metal removal abilities. Using simulated acid mine drainage, this work analyzes the influence of monovalent cations (K+, NH4+, and Na+) on the Fe2+ oxidation and total Fe deposition efficiencies, as well as the phases of secondary iron minerals in an Acidithiobacillus ferrooxidans system. It also compares the Cr(VI) (K2Cr2O7) and As(III) (As2O3) removal efficiencies of different schwertmannites. The results indicated that high concentrations of monovalent cations (NH4+ ≥ 320 mmol/L, and Na+ ≥ 1600 mmol/L) inhibited the biological oxidation of Fe2+. Moreover, the mineralizing abilities of the three cations differed (K+ > NH4+ > Na+), with cumulative Fe deposition efficiencies of 58.7%, 28.1%, and 18.6%, respectively [n(M) = 53.3 mmol/L, cultivation time = 96 h]. Additionally, at initial Cr(VI) and As(III) concentrations of 10 and 1 mg/L, respectively, the Cr(VI) and As(III) removal efficiencies exhibited by schwertmannites acquired by the three mineralization systems differed [n(Na) = 53.3 > n(NH4) = 53.3 > n(K) = 0.8 mmol/L]. Overall, the analytical results suggested that the removal efficiency of toxic elements was mainly influenced by the apparent structure, particle size, and specific surface area of schwertmannite.

Acid Mine Drainage and Heavy Metal Pollution from Solid Waste in the Tongling Mines, China

2010 ◽  
Vol 82 (1) ◽  
pp. 146-153 ◽  
Author(s):  
XU Xiaochun ◽  
XIE Qiaoqin ◽  
CHEN Fang ◽  
WANG Jun ◽  
WU Wentao
Keyword(s):  
Heavy Metal ◽  
Acid Mine Drainage ◽  
Solid Waste ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Mine Drainage ◽  
Acid Mine

scholarly journals Field Study on Heavy Metal Accumulation in a Natural Wetland Receiving Acid Mine Drainage

2001 ◽  
Vol 42 (9) ◽  
pp. 1877-1884
Author(s):  
Keiko Sasaki ◽  
Tagiru Ogino ◽  
Yuji Endo ◽  
Kunihiko Kurosawa
Keyword(s):  
Heavy Metal ◽  
Acid Mine Drainage ◽  
Field Study ◽  
Metal Accumulation ◽  
Mine Drainage ◽  
Heavy Metal Accumulation ◽  
Natural Wetland ◽  
Acid Mine

scholarly journals Field Study on Heavy Metal Accumulation in a Natural Wetland Receiving Acid Mine Drainage

2003 ◽  
Vol 44 (9) ◽  
pp. 1877-1884 ◽  
Author(s):  
Keiko Sasaki ◽  
Tagiru Ogino ◽  
Yuji Endo ◽  
Kunihiko Kurosawa
Keyword(s):  
Heavy Metal ◽  
Acid Mine Drainage ◽  
Field Study ◽  
Metal Accumulation ◽  
Mine Drainage ◽  
Heavy Metal Accumulation ◽  
Natural Wetland ◽  
Acid Mine

Biological treatment of heavy metals in acid mine drainage using sulfate reducing bioreactors

2006 ◽  
Vol 54 (2) ◽  
pp. 179-185 ◽  
Author(s):  
R. Sierra-Alvarez ◽  
S. Karri ◽  
S. Freeman ◽  
J.A. Field
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Acid Mine Drainage ◽  
Biological Treatment ◽  
Mine Drainage ◽  
Metal Removal ◽  
Abandoned Mines ◽  
Synthetic Wastewater ◽  
Sulfate Reducing ◽  
Acid Mine

The uncontrolled release of acid mine drainage (AMD) from abandoned mines and tailing piles threatens water resources in many sites worldwide. AMD introduces elevated concentrations of sulfate ions and dissolved heavy metals as well as high acidity levels to groundwater and receiving surface water. Anaerobic biological processes relying on the activity of sulfate reducing bacteria are being considered for the treatment of AMD and other heavy metal containing effluents. Biogenic sulfides form insoluble complexes with heavy metals resulting in their precipitation. The objective of this study was to investigate the remediation of AMD in sulfate reducing bioreactors inoculated with anaerobic granular sludge and fed with an influent containing ethanol. Biological treatment of an acidic (pH 4.0) synthetic AMD containing high concentrations of heavy metals (100 mg Cu2+l−1; 10 mg Ni2+l−1, 10 mg Zn2+l−1) increased the effluent pH level to 7.0–7.2 and resulted in metal removal efficiencies exceeding 99.2%. The highest metal precipitation rates attained for Cu, Ni and Zn averaged 92.5, 14.6 and 15.8 mg metal l−1 of reactor d−1. The results of this work demonstrate that an ethanol-fed sulfidogenic reactor was highly effective to remove heavy metal contamination and neutralized the acidity of the synthetic wastewater.

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