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Removal of sulphates from acid mine drainage using

Removal of sulphates from acid mine drainage using desilicated fly ash slag F. Ntuli1, T. Falayi2 & U. Thwanane1 1Department of Chemical Engineering, University of Johannesburg, South Africa 2Department of Civil Engineering Sciences, University of Johannesburg, South Africa

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Grades of fly ash Unclassified Sourced directly from power plant Air r classified Sub 45µ Twice r classified Sub 8µ

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leach gold fly ash. Biological leaching of fly ash from municipal waste incineration by Aspergillus niger was examined in batch cultures and compared with chemical leaching. A. niger grew in the presence of up to 10% (w/v) of fly ash in the medium.

Application of mine water leaching protocol on coal fly

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Over the years, coal mining in the Mpumalanga Province of South Africa has negatively affected the environment by causing pollution of water resources, land subsidence and spontaneous coal combustion. Previous studies show that in-situ treatment of acid mine drainage (AMD) using coal fly ash

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Suitability of leaching test methods for fly ash and slag: A review . For choosing the most suitable leaching method according to specific situation, . and the largest steel plant in India, which attracts and supports many industries. ..

Extraction of alumina from coal fly ash using an acid

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In this paper, a two-step acid leach process for the extraction of aluminium from coal fly ash has been conducted using an acid leach-sinter-acid leach technique.

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Surface and bulk characterization of an ultrafine South African coal fly ash chemical composition of the fly ash surface (AES, XPS) was significantly . sample was prepared by placing the sample on a thin layer of Japan Gold .. metal translocation and leaching

Science breaks new ground in converting coal ash from

In South Africa, fly ash is mostly stored in irrigated ash dumps or dry dumps. The chemical weathering of dumps leads to extensive dissolution and leaching of major, minor and trace elements, with

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Leaching characteristics of selected South African fly

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Fly ash samples from two South African coal-fired power stations were subjected to different leaching tests under alkaline and acidic conditions in an attempt to assess the effect of pH on the leachability of species from the fly ashes and also assess the potential impact of the fly ashes disposal on groundwater and the receiving environment.

:Journal of Environmental Science and Health Part A-toxic/hazardous Substances & En:W M Gitari · Ojo O Fatoba · Leslie F Petrik · Viswanath R K Vadapalli: University of the Western Cape:Silicon · Adverse effect · Aluminium oxide · Fly ash · Vanadium · Solubility

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Leaching behaviour of elements from coal combustion fly

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Coal-based power generation produces over 750 Mt of coal ash per year globally, but under 50% of world production is utilised.Large amounts of fly ash are either stored temporarily in stockpiles, disposed of in ash landfills or lagooned.

Evaluation of Heavy Metal Leaching from Coal AshVersus

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Application of coal ash in construction materials is constrained by the potential risk of heavy metal leaching. Limited information is available on the comparative heavy metal leaching from coal

Bottom ash and fly ash wastes as alkalinising reagents for

treatment of acid mine drainage (AMD) in South African mines. Bottom ash (BA) and fly ash (FA) obtained from a coal-powered electricity generation station were derived from calcium and magnesium in the ash. The leaching of metals from CCPs done using the media solutions consisting of AMD from the gold mines and coal mines of South

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