Removal of dissolved Zn(II) using coal mine drainage sludge: Implications for acidic wastewater treatment

Mingcan Cui; Min Jang; Fred S. Cannon; Seunmin Na; Jeehyeong Khim; Jae Kwang Park

doi:10.1016/j.jenvman.2012.12.013

Removal of dissolved Zn(II) using coal mine drainage sludge: Implications for acidic wastewater treatment

Mingcan Cui, Min Jang, Fred S. Cannon, Seunmin Na, Jeehyeong Khim, Jae Kwang Park

School of Civil, Environmental and Architectural Engineering

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

13 Citations (Scopus)

Abstract

The mechanism for the removal of Zn(II) by using coal mine drainage sludge (CMDS) was investigated by spectroscopic analysis and observations of batch tests using model materials. Zeta potential analysis showed that CMDS₂₅ (dried at 25 °C) and CMDS₅₅₀ (dried at 550 °C) had a much lower isoelectric point of pH (pH_IEP) than either goethite or calcite, which are the main constituents of CMDS. This indicates that the negatively charged anion (sulfate) was incorporated into the structural networks and adsorbed on the surface of CMDS via outer-sphere complexation. The removal of Zn(II) by CMDS was thought to be primarily caused by sulfate-complexed iron (oxy)hydroxide and calcite. In particular, the electrostatic attraction of the negatively charged functional group, FeOH-SO₄^2-, to the dissolved Zn(II) could provide high removal efficiencies over a wide pH range. Thermodynamic modeling and Fourier transform infrared spectroscopy (FT-IR) demonstrated that ZnSO₄ is the dominant species in the pH range 3-7 as the sulfate complexes with the hydroxyl groups, whereas the precipitation of Zn(II) as ZnCO₃ or Zn₅(CO₃)₂ (OH)₆ through the dissolution of calcite is the dominant mechanism in the pH range 7-9.6.

Original language	English
Pages (from-to)	107-112
Number of pages	6
Journal	Journal of Environmental Management
Volume	116
DOIs	https://doi.org/10.1016/j.jenvman.2012.12.013
Publication status	Published - 2013 Feb 5

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program through a National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology ( KRF-2009-0092799 ) and supported by a Korea University Grant, Korea Ministry of Environment , and research fund of Korea Mine Reclamation Corporation .

Keywords

Coal mine drainage sludge
Complexation
Fourier transform infrared spectroscopy
Goethite
Hematite
Zeta potential

ASJC Scopus subject areas

Environmental Engineering
Waste Management and Disposal
Management, Monitoring, Policy and Law

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10.1016/j.jenvman.2012.12.013

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title = "Removal of dissolved Zn(II) using coal mine drainage sludge: Implications for acidic wastewater treatment",

abstract = "The mechanism for the removal of Zn(II) by using coal mine drainage sludge (CMDS) was investigated by spectroscopic analysis and observations of batch tests using model materials. Zeta potential analysis showed that CMDS25 (dried at 25 °C) and CMDS550 (dried at 550 °C) had a much lower isoelectric point of pH (pHIEP) than either goethite or calcite, which are the main constituents of CMDS. This indicates that the negatively charged anion (sulfate) was incorporated into the structural networks and adsorbed on the surface of CMDS via outer-sphere complexation. The removal of Zn(II) by CMDS was thought to be primarily caused by sulfate-complexed iron (oxy)hydroxide and calcite. In particular, the electrostatic attraction of the negatively charged functional group, FeOH-SO42-, to the dissolved Zn(II) could provide high removal efficiencies over a wide pH range. Thermodynamic modeling and Fourier transform infrared spectroscopy (FT-IR) demonstrated that ZnSO4 is the dominant species in the pH range 3-7 as the sulfate complexes with the hydroxyl groups, whereas the precipitation of Zn(II) as ZnCO3 or Zn5(CO3)2 (OH)6 through the dissolution of calcite is the dominant mechanism in the pH range 7-9.6.",

keywords = "Coal mine drainage sludge, Complexation, Fourier transform infrared spectroscopy, Goethite, Hematite, Zeta potential",

author = "Mingcan Cui and Min Jang and Cannon, {Fred S.} and Seunmin Na and Jeehyeong Khim and Park, {Jae Kwang}",

note = "Funding Information: This work was supported by the Basic Science Research Program through a National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology ( KRF-2009-0092799 ) and supported by a Korea University Grant, Korea Ministry of Environment , and research fund of Korea Mine Reclamation Corporation . ",

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T2 - Implications for acidic wastewater treatment

AU - Cui, Mingcan

AU - Jang, Min

AU - Cannon, Fred S.

AU - Na, Seunmin

AU - Khim, Jeehyeong

AU - Park, Jae Kwang

N1 - Funding Information: This work was supported by the Basic Science Research Program through a National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology ( KRF-2009-0092799 ) and supported by a Korea University Grant, Korea Ministry of Environment , and research fund of Korea Mine Reclamation Corporation .

PY - 2013/2/5

Y1 - 2013/2/5

N2 - The mechanism for the removal of Zn(II) by using coal mine drainage sludge (CMDS) was investigated by spectroscopic analysis and observations of batch tests using model materials. Zeta potential analysis showed that CMDS25 (dried at 25 °C) and CMDS550 (dried at 550 °C) had a much lower isoelectric point of pH (pHIEP) than either goethite or calcite, which are the main constituents of CMDS. This indicates that the negatively charged anion (sulfate) was incorporated into the structural networks and adsorbed on the surface of CMDS via outer-sphere complexation. The removal of Zn(II) by CMDS was thought to be primarily caused by sulfate-complexed iron (oxy)hydroxide and calcite. In particular, the electrostatic attraction of the negatively charged functional group, FeOH-SO42-, to the dissolved Zn(II) could provide high removal efficiencies over a wide pH range. Thermodynamic modeling and Fourier transform infrared spectroscopy (FT-IR) demonstrated that ZnSO4 is the dominant species in the pH range 3-7 as the sulfate complexes with the hydroxyl groups, whereas the precipitation of Zn(II) as ZnCO3 or Zn5(CO3)2 (OH)6 through the dissolution of calcite is the dominant mechanism in the pH range 7-9.6.

AB - The mechanism for the removal of Zn(II) by using coal mine drainage sludge (CMDS) was investigated by spectroscopic analysis and observations of batch tests using model materials. Zeta potential analysis showed that CMDS25 (dried at 25 °C) and CMDS550 (dried at 550 °C) had a much lower isoelectric point of pH (pHIEP) than either goethite or calcite, which are the main constituents of CMDS. This indicates that the negatively charged anion (sulfate) was incorporated into the structural networks and adsorbed on the surface of CMDS via outer-sphere complexation. The removal of Zn(II) by CMDS was thought to be primarily caused by sulfate-complexed iron (oxy)hydroxide and calcite. In particular, the electrostatic attraction of the negatively charged functional group, FeOH-SO42-, to the dissolved Zn(II) could provide high removal efficiencies over a wide pH range. Thermodynamic modeling and Fourier transform infrared spectroscopy (FT-IR) demonstrated that ZnSO4 is the dominant species in the pH range 3-7 as the sulfate complexes with the hydroxyl groups, whereas the precipitation of Zn(II) as ZnCO3 or Zn5(CO3)2 (OH)6 through the dissolution of calcite is the dominant mechanism in the pH range 7-9.6.

KW - Coal mine drainage sludge

KW - Complexation

KW - Fourier transform infrared spectroscopy

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KW - Hematite

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Removal of dissolved Zn(II) using coal mine drainage sludge: Implications for acidic wastewater treatment

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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