Heavy metal removal mechanism of acid mine drainage in wetlands: A critical review

Sheoran, A. S.; Sheoran, V.

doi:10.1016/j.mineng.2005.08.006

Cited by 678 publications

(332 citation statements)

References 84 publications

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“…Wetlands have the capacity to precipitate metal sulfides (Sheoran & Sheoran, 2006) and adsorb positive metal ions to negatively charged clay particles or organic material (Johnson & Hallberg, 2005). The longer flow paths and slower velocities of subsurface flow allow for greater contact time with biogeochemically active attenuating features, therefore flow through the subsurface can be particularly important to promoting removal processes (Gandy et al, 2007;Mulholland & DeAngelis, 2000).…”

Section: )mentioning

confidence: 99%

“…In particular, wetlands have been identified as settings that host many AMD attenuating reactions due to their steep redox and dissolved organic matter (DOM) concentration gradients (Johnson & Hallberg, 2005). Wetlands with clay deposits can also host sorption reactions as positively charged metals adsorb to negatively charged clay particles or organic material (Sheoran & Sheoran, 2006). The resistive anomalies in the shallow subsurface in this study were interpreted to be primarily driven by temperature changes from localized surface-groundwater communication, but where there is enhanced communication with surface water there is also likely to be mixing of organic-rich surface water to provide nutrients for enhanced sulfate and metal oxide reduction.…”

Section: Reactive Transportmentioning

confidence: 99%

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Non-invasive flow path characterization in a mining-impacted wetland

Bethune

Randell

Runkel

et al. 2015

Journal of Contaminant Hydrology

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Time-lapse electrical resistivity (ER) is used in this study to capture the annual pulse of acid mine drainage (AMD) contamination, the so-called 'first-flush' driven by spring snowmelt, through the subsurface of a wetland downgradient of the abandoned Pennsylvania Mine workings in Central Colorado. Data were collected from mid-July to late October of 2013, with an additional dataset collected in June of 2014. ER provides a distributed measurement of changes in subsurface electrical properties at high spatial resolution. Inversion of the data shows the development through time of multiple resistive anomalies in the subsurface, which corroborating data suggest are driven by changes in total dissolved solids (TDS) localized in preferential flow pathways. Because of the non-uniqueness inherent to deterministic inversion, the exact geometry and magnitude of the anomalies is unknown, but sensitivity analyses on synthetic data taken to mimic the site suggest that the anomalies would need to be at least several meters in diameter to be adequately resolved by the inversions. Preferential flow path existence would have a critical impact on the extent of attenuation mechanisms at the site, and their further characterization could be used to parameterize reactive transport models in developing quantitative predictions of remediation strategies.iii

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Section: )mentioning

confidence: 99%

Section: Reactive Transportmentioning

confidence: 99%

Non-invasive flow path characterization in a mining-impacted wetland

Bethune

Randell

Runkel

et al. 2015

Journal of Contaminant Hydrology

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“…[1][2][3] Acid mine drainage is also known as acid rock drainage had the severe effect on the mining based nation all over the world. Its generation will start with initial stages of mining operations and sometimes continues for a very long time even after mine closures 4 , until famous anyone member (i.e. water, air, and pyrite) absent from the generation site.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Acid Mine Drainage Using a Sandstone Column

2017

RJC

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Acid mine drainage (AMD) or Acid rock drainage (ARD) from mining industry poses worldwide severe environmental problems including India also. In this study, heavy metal removal was tested in AMD samples collected from the Gorbi abandoned coal mine (India), having iron concentrations of 75 mg/L. Sandstone was collected from mine sites and converted into powders form and used as low-cost adsorbent in a column to treat acid mine drainage (AMD) obtained from the inactive Gorbi opencast coal mines (Singrauli coalfields, NCL). The pH value of the pit water sample improved from 2.48 to 3.90, along with the removal of, 100 % total iron, Lead (Pb), Cadmium (Cd), 71% of the electrical conductivity, 73% total dissolved solids and 50% of the salinity.

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“…They are sedimentation, sorption, precipitation, plant uptake and others. The design of a wetland determines how wastewater will be treated and what mechanisms will be involved [8]- [10]. Wetlands in which the wastewater flows horizontally over the wetland sediment are called surface flow (SF) wetlands or free water surface (FWS) wetlands.…”

Section: Introductionmentioning

confidence: 99%

Metal and metalloid sequestration in a constructed wetland system for treatment of landfill leachate during 2003-2012

Waara

Bandaruk

2017

Eco-Tech

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The treatment of landfill leachate in constructed wetland systems is a common practice in Europe. However, very few studies were made to evaluate their performance over a long period of time. A free surface constructed wetland system consisting of sediment traps followed by 10 ponds connected with overflows was built at Atleverket near Örebro, Sweden in 2001. It receives pre-treated leachate from the municipal landfill. As part of the wetland monitoring programme a large data set on the surface concentrations of 15 metals and 2 metalloids has been collected from different sampling sites within the wetland during the operation period. In this study, the data from inlet and outlet of the wetland were compiled and analysed. The aim of this paper is therefore to estimate the removal efficiency of metals and metalloids using data on concentrations and flow and investigate the effect of wetland age on removal pattern. The elements with the highest removal efficiency were Al, As, Ba, Ca, Cr, Cu, Fe, Mn, Pb, V and Zn ranging from 95% for Pb to 65 % for Ca. The elements with the lowest reduction were B, Co K, Mg, Ni and S ranging from Co 56 % to 40 % for S. It was found that the removal efficiency was not related to inlet concentrations of the elements as the elements with high and low inlet concentrations were found in both groups. Analysis of reduction pattern also revealed that the group with higher removal efficiency showed fairly constant outlet concentrations during the study period, while the elements with lower removal efficiency demonstrated variable outlet concentrations. No statistical difference in removal due to age of the wetland was found. The study results showed that the wetland system has high removal efficiency of metals and metalloids and the removal pattern is not affected by age of the wetland. The influence on reduction due to leachate characteristics, wetland design and retention time will be discussed.

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Heavy metal removal mechanism of acid mine drainage in wetlands: A critical review

Cited by 678 publications

References 84 publications

Non-invasive flow path characterization in a mining-impacted wetland

Non-invasive flow path characterization in a mining-impacted wetland

Treatment of Acid Mine Drainage Using a Sandstone Column

Metal and metalloid sequestration in a constructed wetland system for treatment of landfill leachate during 2003-2012

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