Leaching of Potential Hazardous Elements of Coal Cleaning Rejects

Luis F.O. Silva; Maria Izquierdo; Xavier Querol; Robert B. Finkelman; Marcos L.S. Oliveira; Marcus Wollenschlager; Mark R. Towler; Rafael Pérez-López; Felipe MacIas

doi:10.1007/s10661-010-1497-1

Leaching of Potential Hazardous Elements of Coal Cleaning Rejects

Luis F.O. Silva
, Maria Izquierdo
, Xavier Querol
, Robert B. Finkelman
, Marcos L.S. Oliveira
, Marcus Wollenschlager
, Mark R. Towler
, Rafael Pérez-López
, Felipe MacIas

Missouri University of Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

The geochemical characteristics of coal cleaning rejects (CCR) in Santa Catarina State, Brazil, were investigated. Around 3.5 million ton/ year of coal waste are dumped in Santa Catarina State. Coal beneficiation by froth flotation results in large amounts of CCR composed of coaly and mineral matter, the latter characterized by the occurrence of sulphide minerals and a broad array of leachable elements. The total and leachable contents of more than 60 elements were analyzed. Atmospheric exposure promotes sulphide oxidation that releases substantial sulphate loads as well as Ca ²⁺ , K ⁺ , Mg ²⁺ , Cl- and Al ³⁺ . The metals with the most severe discharges were Zn, Cu, Mn, Co, Ni and Cd. Most trace pollutants in the CCR displayed a marked pH-dependent solubility, being immobile in near-neutral samples. The results highlight the complex interactions among mineral matter solubility, pH and the leaching of potentially hazardous elements. © 2010 Springer Science+Business Media B.V.

Original language	American English
Journal	Environmental Monitoring and Assessment
Volume	175
DOIs	https://doi.org/10.1007/s10661-010-1497-1
State	Published - Apr 1 2011

Disciplines

Biochemical and Biomolecular Engineering
Biomedical Devices and Instrumentation
Chemical Engineering

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title = "Leaching of Potential Hazardous Elements of Coal Cleaning Rejects",

abstract = " The geochemical characteristics of coal cleaning rejects (CCR) in Santa Catarina State, Brazil, were investigated. Around 3.5 million ton/ year of coal waste are dumped in Santa Catarina State. Coal beneficiation by froth flotation results in large amounts of CCR composed of coaly and mineral matter, the latter characterized by the occurrence of sulphide minerals and a broad array of leachable elements. The total and leachable contents of more than 60 elements were analyzed. Atmospheric exposure promotes sulphide oxidation that releases substantial sulphate loads as well as Ca 2+ , K + , Mg 2+ , Cl- and Al 3+ . The metals with the most severe discharges were Zn, Cu, Mn, Co, Ni and Cd. Most trace pollutants in the CCR displayed a marked pH-dependent solubility, being immobile in near-neutral samples. The results highlight the complex interactions among mineral matter solubility, pH and the leaching of potentially hazardous elements. {\textcopyright} 2010 Springer Science+Business Media B.V.",

author = "Silva, \{Luis F.O.\} and Maria Izquierdo and Xavier Querol and Finkelman, \{Robert B.\} and Oliveira, \{Marcos L.S.\} and Marcus Wollenschlager and Towler, \{Mark R.\} and Rafael P{\'e}rez-L{\'o}pez and Felipe MacIas",

year = "2011",

month = apr,

day = "1",

doi = "10.1007/s10661-010-1497-1",

language = "American English",

volume = "175",

journal = "Environmental Monitoring and Assessment",

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TY - JOUR

T1 - Leaching of Potential Hazardous Elements of Coal Cleaning Rejects

AU - Silva, Luis F.O.

AU - Izquierdo, Maria

AU - Querol, Xavier

AU - Finkelman, Robert B.

AU - Oliveira, Marcos L.S.

AU - Wollenschlager, Marcus

AU - Towler, Mark R.

AU - Pérez-López, Rafael

AU - MacIas, Felipe

PY - 2011/4/1

Y1 - 2011/4/1

N2 - The geochemical characteristics of coal cleaning rejects (CCR) in Santa Catarina State, Brazil, were investigated. Around 3.5 million ton/ year of coal waste are dumped in Santa Catarina State. Coal beneficiation by froth flotation results in large amounts of CCR composed of coaly and mineral matter, the latter characterized by the occurrence of sulphide minerals and a broad array of leachable elements. The total and leachable contents of more than 60 elements were analyzed. Atmospheric exposure promotes sulphide oxidation that releases substantial sulphate loads as well as Ca 2+ , K + , Mg 2+ , Cl- and Al 3+ . The metals with the most severe discharges were Zn, Cu, Mn, Co, Ni and Cd. Most trace pollutants in the CCR displayed a marked pH-dependent solubility, being immobile in near-neutral samples. The results highlight the complex interactions among mineral matter solubility, pH and the leaching of potentially hazardous elements. © 2010 Springer Science+Business Media B.V.

AB - The geochemical characteristics of coal cleaning rejects (CCR) in Santa Catarina State, Brazil, were investigated. Around 3.5 million ton/ year of coal waste are dumped in Santa Catarina State. Coal beneficiation by froth flotation results in large amounts of CCR composed of coaly and mineral matter, the latter characterized by the occurrence of sulphide minerals and a broad array of leachable elements. The total and leachable contents of more than 60 elements were analyzed. Atmospheric exposure promotes sulphide oxidation that releases substantial sulphate loads as well as Ca 2+ , K + , Mg 2+ , Cl- and Al 3+ . The metals with the most severe discharges were Zn, Cu, Mn, Co, Ni and Cd. Most trace pollutants in the CCR displayed a marked pH-dependent solubility, being immobile in near-neutral samples. The results highlight the complex interactions among mineral matter solubility, pH and the leaching of potentially hazardous elements. © 2010 Springer Science+Business Media B.V.

UR - https://scholarsmine.mst.edu/che_bioeng_facwork/1169

U2 - 10.1007/s10661-010-1497-1

DO - 10.1007/s10661-010-1497-1

M3 - Article

C2 - 20490913

SN - 1573-2959

VL - 175

JO - Environmental Monitoring and Assessment

JF - Environmental Monitoring and Assessment

ER -

Leaching of Potential Hazardous Elements of Coal Cleaning Rejects

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