Biochar for Treating Acid Mine Drainage

Oh, Seok‐Young; Yoon, Myong-Keun

doi:10.1089/ees.2013.0063

Cited by 17 publications

(10 citation statements)

References 13 publications

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“…The metal concentration was slightly higher in the autumn sampling (S2, C2 and G2) period than in summer (S1, C1and G1). Inter seasonal variational of metal concentration in the AMD was also observed by Oh and Yoon (2013), who reported that the metal concentration in AMD in summer samples was signi cantly higher than that in spring samples. Changes in some seasonal parameters such as the amount of precipitation, temperature and runoff may partially explain the changes in concentration of metals (Mondol et al 2011;Wijngaard et al 2017).…”

Section: Metal Concentrations In the Frongoch Mine Amdsupporting

confidence: 65%

Bioaccumulation of Metals by Algae From Acid Mine Drainage: A Case Study of Frongoch Mine (United Kingdom)

Bogush

Edwards

et al. 2022

Preprint

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Acid mine drainage (AMD) contains high concentrations of potentially toxic metals, which contaminates receiving watercourse. In Frongoch Mine (United Kingdom), it is unclear the distribution of metals on indigenous algae and whether these species of algae can accumulate metals. This study investigated the role of indigenous algae for metals removal from AMD and examined if metals can be adsorbed on the surface or/and bioaccumulated in algae. Sequential extraction procedure was applied for algae samples collected from AMD water to identify the forms in which metals are found in algae. Concentrations of Fe, Pb, Zn, Cu, and Cd in algae were determined. AMD samples were found to have pH 3.5 to 6.9 and high concentrations of Zn (351 mg/L) and Pb (4.22 mg/L) that exceeded water quality standards. Algae Ulothrix sp. and Oedogonium sp. were the two main species in the Frongoch AMDs. Concentrations of metals in algae ranged from 0.007 to 51 mg/g and the bioconcentration factor of metals decreased in the following order: Fe>>Pb>>Cu>Cd>Zn. Zn, Cu and Cd were found to be adsorbed on algae surface and bioaccumulated in the algae while Pb and Fe mainly bioaccumulated in the algae. Indigenous algae can be considered as a biogeochemical barrier to bioaccumulate algae and as a bioremediation method. Also, indigenous algae could be used as a bioindicator for the assessment of water pollution at Frongoch Mine and other metal mines.

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Section: Metal Concentrations In the Frongoch Mine Amdsupporting

confidence: 65%

Bioaccumulation of Metals by Algae From Acid Mine Drainage: A Case Study of Frongoch Mine (United Kingdom)

Bogush

Edwards

et al. 2022

Preprint

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“…Thus, it is unlikely that the pH would drop to 6 in subsurface environments considering the biochar pH, and buffering capacity of soils and aquifer materials. However, for extremely acidic cases (e.g., acid mine drainage; Oh and Yoon, 2013), biochar may not be applicable due to the possible toxic effects. Surface treatment of biochar with acid may not be desirable considering the acidic pH after surface activation (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Sorption of Nitro Explosives to Polymer/Biomass‐Derived Biochar

Seo

Jeong

et al. 2018

J of Env Quality

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Factors affecting the sorptive removal of nitro explosives (2,4,6-trinitrotoluene [TNT] and hexahydro-1,3,5-trinitro-1,3,5-triazine [RDX]) to polymer/biomass-derived biochar were investigated through batch experiments. Compared with that of rice ( L.) straw (RS)-derived biochar, the sorption of TNT and RDX to polymer/RS-derived biochar was greatly enhanced by>2.5 and 4 times, respectively. The type and amount of polymer did not significantly affect the sorption of nitro explosives to polymer/RS-derived biochar. Pyrolysis temperature did not affect the sorption capacity. Surface treatment with acid or an oxidant did not significantly change the sorption capacity, suggesting that polymer residues may be strongly responsible for the enhancement. Possible polymer residues were identified via gas chromatography mass spectrometry analysis. The toxicity characteristic leaching procedure and Microtox bioassay analyses indicated that polymer/RS-derived biochar did not show possible harmful effects. Our results suggest that polymer/RS-derived biochar can be effectively used as a sorbent to remove nitro explosives both in the natural environment and engineered systems.

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“…Due to the large surface area and welldeveloped functional groups on the surface of biochar, immobilization with biochar was suggested as a way to remove toxic metals in natural water and soil. Biochars synthesized from various types of biomasses, such as coal, wood, bark, biosolid (sludge), manure, and broil litter, were evaluated as sorbents to remove cationic metals and toxic anions (Pattanayak et al 2000;Seredych and Badosz 2006;Machida et al 2006;Mohan et al 2007;Cao et al 2009;Lima et al 2009;Borchard et al 2011;Uchimiya et al 2010Uchimiya et al , 2011Lu et al 2012;Peng et al 2012;Oh and Yoon 2013). The extent of metal sorption to biochar was strongly affected by the properties of the biochar, including pH, surface area, point of zero charge (PZC), surface functional groups, oxygen and hydrogen contents, and aromaticity.…”

Section: Introductionmentioning

confidence: 99%

Sorption of halogenated phenols and pharmaceuticals to biochar: affecting factors and mechanisms

Seo

2015

Environ Sci Pollut Res

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The feasibility of using biochar as a sorbent to remove nine halogenated phenols (2,4-dichlorophenol, 2,4-dibromophenol, 2,4-difluorophenol, 2-chlorophenol, 4-chlorophenol, 2-bromophenol, 4-bromophenol, 2-fluorophenol, and 4-fluorophenol) and two pharmaceuticals (triclosan and ibuprofen) from water was examined through a series of batch experiments. Types of biochar, synthesized using various biomasses including fallen leaves, rice straw, corn stalk, used coffee grounds, and biosolids, were evaluated. Compared to granular activated carbon (GAC), most of the biochar samples did not effectively remove halogenated phenols or pharmaceuticals from water. The increase in pH and deprotonation of phenols in biochar systems may be responsible for its ineffectiveness at this task. When pH was maintained at 4 or 7, the sorption capacity of biochar was markedly increased. Considering maximum sorption capacity and properties of sorbents and sorbates, it appears that the sorption capacity of biochar for halogenated phenols is related to the surface area and carbon content of the biochar and the hydrophobicity of halogenated phenols. In the cases of triclosan and ibuprofen, the sorptive capacities of GAC, graphite, and biochars were also significantly affected by pH, according to the point of zero charge (PZC) of sorbents and deprotonation of the pharmaceuticals. Pyrolysis temperature did not affect the sorption capacity of halogenated phenols or pharmaceuticals. Based on the experimental observations, some biochars are good candidates for removal of halogenated phenols, triclosan, and ibuprofen from water and soil.

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Biochar for Treating Acid Mine Drainage

Cited by 17 publications

References 13 publications

Bioaccumulation of Metals by Algae From Acid Mine Drainage: A Case Study of Frongoch Mine (United Kingdom)

Bioaccumulation of Metals by Algae From Acid Mine Drainage: A Case Study of Frongoch Mine (United Kingdom)

Sorption of Nitro Explosives to Polymer/Biomass‐Derived Biochar

Sorption of halogenated phenols and pharmaceuticals to biochar: affecting factors and mechanisms

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