A review of treatment technologies for the mitigation of the toxic environmental effects of acid mine drainage (AMD)

Ighalo, Joshua O.; Kurniawan, Setyo Budi; Iwuozor, Kingsley O.; Aniagor, Chukwunonso O.; Ajala, Oluwaseun J.; Oba, Stephen N.; Iwuchukwu, Felicitas U.; Ahmadi, Shahin; Igwegbe, Chinenye Adaobi

doi:10.1016/j.psep.2021.11.008

Cited by 133 publications

(36 citation statements)

References 160 publications

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“…Biological treatment approaches have the merits of eco-friendliness, low cost, and efficiency [70]. Different forms of biological treatment are used for the removal of pharmaceutical contaminants from the water bodies [71].…”

Section: Biological Methodsmentioning

confidence: 99%

Recent Advances on the Aqueous Phase Adsorption of Carbamazepine

et al. 2022

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Carbamazepine (CBZ) is a pharmaceutical compound used in medical practice. Due to the ecotoxicological risk of its presence in the aqueous environment, researchers have been investigating its removal by adsorption technique. The aim of this study is to review the works done on the removal of CBZ from water by adsorption. Carbon‐based materials were the best types of adsorbent for CBZ uptake (> 200 mg g−1). Molecularly imprinted polymer (MIP) and carbon nanotubes (CNTs) showed especially good adsorption capacities. The key mechanisms of CBZ adsorption were π‐π interaction, electrostatic interactions, hydrogen‐bonding and hydrophobic interactions. Classical equilibrium isotherm models like Langmuir and Freundlich were always best‐fits and kinetics modelling was best‐fit to the pseudo‐second order model. The thermodynamics modelling of CBZ adsorption showed it was spontaneous and endothermic for most adsorbents. Methanol and acetone were especially effective for the desorption of CBZ from adsorbents and can achieve > 90 % removal even after 4–5 cycles. CBZ competes favorably in adsorption systems with other pharmaceutical species due to the advantages of the hydrophobic effect and molecular size.

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Section: Biological Methodsmentioning

confidence: 99%

Recent Advances on the Aqueous Phase Adsorption of Carbamazepine

et al. 2022

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“…Acid mine drainage (AMD) has a deleterious impact associated with metalliferous mineral exploitation, leaching potentially toxic metals that can affect the environment (Alpers and Nordstorm 1997;Hudson-Edwards et al 2011;Nordstrom 2011;Favas et al 2016;Bogush et al 2016;Rambabu et al 2020;Sahoo et al 2020). Generally, AMD is harmful to the environment nearby and is also thought to affect areas downstream where metals can be transported at some distance (Kumari et al 2010;Ighalo et al 2022). For example, AMD can increase river water turbidity due to soil erosion and cause precipitation layering on the riverbed and stream bottom, changing the habitat for organisms (Kumari et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Bioaccumulation of metals by algae from acid mine drainage: a case study of Frongoch Mine (UK)

Bogush

Edwards

et al. 2022

Environ Sci Pollut Res

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In Frongoch Mine (UK), it is unclear the distribution of metals on indigenous algae and whether these species of algae can accumulate metals. This study aimed to investigate the role of indigenous algae for metal removal from acid mine drainage and understand if metals can be adsorbed on the surface of algae or/and bioaccumulated in algae. A sequential extraction procedure was applied for algae samples collected from acid mine drainage (AMD) water to identify the forms in which metals are found in algae. Concentrations of Fe, Pb, Zn, Cu and Cd were evaluated in the algae and AMD samples were collected in June and October 2019. AMDs samples had a pH value ranging between 3.5 and 6.9 and high concentrations of Zn (351 mg/L) and Pb (4.22 mg/L) that exceeded the water quality standards (Water Framework Directive, 2015). Algae Ulothrix sp. and Oedogonium sp. were the two main species in the Frongoch AMDs. The 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. It was found that Zn, Cu and Cd were adsorbed onto the surface of and bioaccumulated in the algae, while Pb and Fe were mainly bioaccumulated in the algae. Indigenous algae can be considered as a biogeochemical barrier where metals are accumulating and can be used in bioremediation methods. Also, indigenous algae could be used as a bioindicator to assess water pollution at Frongoch Mine and other similar metal mines.

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“…Several technologies, such as adsorption, are known to have good efficiency in removing DBPs from water ( Jiang et al., 2017 ; Zainudin et al., 2018; Verdugo et al., 2020 ). In addition, a biological approach using microbes, as a green technology and being inexpensive to operate and maintain compared with other physicochemical techniques ( Imron et al., 2020 ; Kurniawan et al., 2021c ), can be explored to biodegrade DBPs effectively, although this method may impose long retention time ( Ighalo et al., 2022 ; Igwegbe et al., 2022 ). Through implementing these technologies as advanced treatment for ballast water before discharge, the potential impact of DBPs can be greatly reduced, and marine environmental pollution can be prevented.…”

Section: Future Approachesmentioning

confidence: 99%