Direct aqueous mineral carbonation of waste slate using ammonium salt solutions

Hwanju Jo; Ho Young Jo; Sunwon Rha; Pyeong Koo Lee

doi:10.3390/met5042413

Direct aqueous mineral carbonation of waste slate using ammonium salt solutions

Hwanju Jo, Ho Young Jo, Sunwon Rha, Pyeong Koo Lee

Department of Earth and Environmental Sciences

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

8 Citations (Scopus)

Abstract

The carbonation of asbestos-containing waste slate using a direct aqueous mineral carbonation method was evaluated. Leaching and carbonation tests were conducted on asbestos-containing waste slate using ammonium salt (CH₃COONH₄, NH₄NO₃, and NH₄HSO₄) solutions at various concentrations. The CH₃COONH₄ solution had the highest Ca-leaching efficiency (17%–35%) and the NH₄HSO₄ solution had the highest Mg-leaching efficiency (7%–24%) at various solid dosages and solvent concentrations. The CaCO₃ content of the reacted materials based on thermogravimetric analysis (TGA) was approximately 10%–17% higher than that of the as-received material for the 1 M CH₃COONH₄ and the 1 M NH₄HSO₄ solutions. The carbonates were precipitated on the surface of chrysotile, which was contained in the waste slate reacted with CO₂. These results imply that CO₂ can be sequestered by a direct aqueous mineral carbonation using waste slate.

Original language	English
Pages (from-to)	2413-2427
Number of pages	15
Journal	Metals
Volume	5
Issue number	4
DOIs	https://doi.org/10.3390/met5042413
Publication status	Published - 2015 Dec 18

Bibliographical note

Publisher Copyright:
© 2015 by the authors; licensee MDPI, Basel, Switzerland.

Keywords

Ammonium salts
Asbestos
CO sequestration
Mineral carbonation
Waste slate

ASJC Scopus subject areas

Materials Science(all)

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10.3390/met5042413

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title = "Direct aqueous mineral carbonation of waste slate using ammonium salt solutions",

abstract = "The carbonation of asbestos-containing waste slate using a direct aqueous mineral carbonation method was evaluated. Leaching and carbonation tests were conducted on asbestos-containing waste slate using ammonium salt (CH3COONH4, NH4NO3, and NH4HSO4) solutions at various concentrations. The CH3COONH4 solution had the highest Ca-leaching efficiency (17%–35%) and the NH4HSO4 solution had the highest Mg-leaching efficiency (7%–24%) at various solid dosages and solvent concentrations. The CaCO3 content of the reacted materials based on thermogravimetric analysis (TGA) was approximately 10%–17% higher than that of the as-received material for the 1 M CH3COONH4 and the 1 M NH4HSO4 solutions. The carbonates were precipitated on the surface of chrysotile, which was contained in the waste slate reacted with CO2. These results imply that CO2 can be sequestered by a direct aqueous mineral carbonation using waste slate.",

keywords = "Ammonium salts, Asbestos, CO sequestration, Mineral carbonation, Waste slate",

author = "Hwanju Jo and Jo, {Ho Young} and Sunwon Rha and Lee, {Pyeong Koo}",

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T1 - Direct aqueous mineral carbonation of waste slate using ammonium salt solutions

AU - Jo, Hwanju

AU - Jo, Ho Young

AU - Rha, Sunwon

AU - Lee, Pyeong Koo

PY - 2015/12/18

Y1 - 2015/12/18

N2 - The carbonation of asbestos-containing waste slate using a direct aqueous mineral carbonation method was evaluated. Leaching and carbonation tests were conducted on asbestos-containing waste slate using ammonium salt (CH3COONH4, NH4NO3, and NH4HSO4) solutions at various concentrations. The CH3COONH4 solution had the highest Ca-leaching efficiency (17%–35%) and the NH4HSO4 solution had the highest Mg-leaching efficiency (7%–24%) at various solid dosages and solvent concentrations. The CaCO3 content of the reacted materials based on thermogravimetric analysis (TGA) was approximately 10%–17% higher than that of the as-received material for the 1 M CH3COONH4 and the 1 M NH4HSO4 solutions. The carbonates were precipitated on the surface of chrysotile, which was contained in the waste slate reacted with CO2. These results imply that CO2 can be sequestered by a direct aqueous mineral carbonation using waste slate.

AB - The carbonation of asbestos-containing waste slate using a direct aqueous mineral carbonation method was evaluated. Leaching and carbonation tests were conducted on asbestos-containing waste slate using ammonium salt (CH3COONH4, NH4NO3, and NH4HSO4) solutions at various concentrations. The CH3COONH4 solution had the highest Ca-leaching efficiency (17%–35%) and the NH4HSO4 solution had the highest Mg-leaching efficiency (7%–24%) at various solid dosages and solvent concentrations. The CaCO3 content of the reacted materials based on thermogravimetric analysis (TGA) was approximately 10%–17% higher than that of the as-received material for the 1 M CH3COONH4 and the 1 M NH4HSO4 solutions. The carbonates were precipitated on the surface of chrysotile, which was contained in the waste slate reacted with CO2. These results imply that CO2 can be sequestered by a direct aqueous mineral carbonation using waste slate.

KW - Ammonium salts

KW - Asbestos

KW - CO sequestration

KW - Mineral carbonation

KW - Waste slate

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DO - 10.3390/met5042413

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SN - 2075-4701

VL - 5

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JF - Metals

IS - 4

ER -

Direct aqueous mineral carbonation of waste slate using ammonium salt solutions

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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