Removal of Cd(II) and Pb(II) from wastewater via carbonation of aqueous Ca(OH)2 derived from eggshell

Lulit Habte; Natnael Shiferaw; Thenepalli Thriveni; Dure Mulatu; Mee hye Lee; Seok ho Jung; Ji Whan Ahn

doi:10.1016/j.psep.2020.05.036

Removal of Cd(II) and Pb(II) from wastewater via carbonation of aqueous Ca(OH)₂ derived from eggshell

Lulit Habte, Natnael Shiferaw, Thenepalli Thriveni, Dure Mulatu, Mee hye Lee, Seok ho Jung, Ji Whan Ahn

Department of Earth and Environmental Sciences

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

21 Citations (Scopus)

Abstract

Accelerated carbonation is an effective and attractive method for the utilization of captured and stored CO₂. It has versatile applications in different fields. One of the applications presented in this study was investigation of the efficiency of carbonation of Ca(OH)₂ derived from waste eggshell to remove heavy metals from wastewater. Cadmium (Cd(II)) and lead (Pb(II)) were the target heavy metals for this study. Three parameters were studied: Ca(OH)₂ dosage, initial Cd(II) and Pb(II) concentration, and CO₂ flow rate. The optimum conditions were 3 g/L of Ca(OH)₂, 100 mg/L of initial metal concentration and 1 L/min of CO₂ flow rate where the removal efficiencies were found to be 99.99% and 99.63% for Cd(II) and Pb(II) respectively. The phase transformation has also been detected by XRD, FTIR and TGA/DTA analysis. All the results showed a transformation of Ca(OH)₂ to CaCO₃ (calcite) due to complete carbonation. The transfer of CO₂ during calcite formation in the presence of Pb(II) and Cd(II) was slightly retarded by a retarding factor of 0.06 and 0.09 respectively. The carbonation process was also applied to real wastewater and the performance was effective although it had very low concentrations of cadmium and lead. Precipitation of metal carbonate was the dominant mechanism for the removal of heavy metals.

Original language	English
Pages (from-to)	278-287
Number of pages	10
Journal	Process Safety and Environmental Protection
Volume	141
DOIs	https://doi.org/10.1016/j.psep.2020.05.036
Publication status	Published - 2020 Sept

Bibliographical note

Funding Information:
This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea government (MSIT) (No. CAP-18-09-KIGAM ).

Publisher Copyright:
© 2020 Institution of Chemical Engineers

Keywords

Cadmium
Carbonation
Final concentration
Lead
Removal efficiency
Waste eggshell

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
General Chemical Engineering
Safety, Risk, Reliability and Quality

Access to Document

10.1016/j.psep.2020.05.036

Cite this

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title = "Removal of Cd(II) and Pb(II) from wastewater via carbonation of aqueous Ca(OH)2 derived from eggshell",

abstract = "Accelerated carbonation is an effective and attractive method for the utilization of captured and stored CO2. It has versatile applications in different fields. One of the applications presented in this study was investigation of the efficiency of carbonation of Ca(OH)2 derived from waste eggshell to remove heavy metals from wastewater. Cadmium (Cd(II)) and lead (Pb(II)) were the target heavy metals for this study. Three parameters were studied: Ca(OH)2 dosage, initial Cd(II) and Pb(II) concentration, and CO2 flow rate. The optimum conditions were 3 g/L of Ca(OH)2, 100 mg/L of initial metal concentration and 1 L/min of CO2 flow rate where the removal efficiencies were found to be 99.99% and 99.63% for Cd(II) and Pb(II) respectively. The phase transformation has also been detected by XRD, FTIR and TGA/DTA analysis. All the results showed a transformation of Ca(OH)2 to CaCO3 (calcite) due to complete carbonation. The transfer of CO2 during calcite formation in the presence of Pb(II) and Cd(II) was slightly retarded by a retarding factor of 0.06 and 0.09 respectively. The carbonation process was also applied to real wastewater and the performance was effective although it had very low concentrations of cadmium and lead. Precipitation of metal carbonate was the dominant mechanism for the removal of heavy metals.",

keywords = "Cadmium, Carbonation, Final concentration, Lead, Removal efficiency, Waste eggshell",

author = "Lulit Habte and Natnael Shiferaw and Thenepalli Thriveni and Dure Mulatu and Lee, {Mee hye} and Jung, {Seok ho} and Ahn, {Ji Whan}",

note = "Funding Information: This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea government (MSIT) (No. CAP-18-09-KIGAM ). Publisher Copyright: {\textcopyright} 2020 Institution of Chemical Engineers",

year = "2020",

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doi = "10.1016/j.psep.2020.05.036",

language = "English",

volume = "141",

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T1 - Removal of Cd(II) and Pb(II) from wastewater via carbonation of aqueous Ca(OH)2 derived from eggshell

AU - Habte, Lulit

AU - Shiferaw, Natnael

AU - Thriveni, Thenepalli

AU - Mulatu, Dure

AU - Lee, Mee hye

AU - Jung, Seok ho

AU - Ahn, Ji Whan

N1 - Funding Information: This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea government (MSIT) (No. CAP-18-09-KIGAM ). Publisher Copyright: © 2020 Institution of Chemical Engineers

PY - 2020/9

Y1 - 2020/9

N2 - Accelerated carbonation is an effective and attractive method for the utilization of captured and stored CO2. It has versatile applications in different fields. One of the applications presented in this study was investigation of the efficiency of carbonation of Ca(OH)2 derived from waste eggshell to remove heavy metals from wastewater. Cadmium (Cd(II)) and lead (Pb(II)) were the target heavy metals for this study. Three parameters were studied: Ca(OH)2 dosage, initial Cd(II) and Pb(II) concentration, and CO2 flow rate. The optimum conditions were 3 g/L of Ca(OH)2, 100 mg/L of initial metal concentration and 1 L/min of CO2 flow rate where the removal efficiencies were found to be 99.99% and 99.63% for Cd(II) and Pb(II) respectively. The phase transformation has also been detected by XRD, FTIR and TGA/DTA analysis. All the results showed a transformation of Ca(OH)2 to CaCO3 (calcite) due to complete carbonation. The transfer of CO2 during calcite formation in the presence of Pb(II) and Cd(II) was slightly retarded by a retarding factor of 0.06 and 0.09 respectively. The carbonation process was also applied to real wastewater and the performance was effective although it had very low concentrations of cadmium and lead. Precipitation of metal carbonate was the dominant mechanism for the removal of heavy metals.

AB - Accelerated carbonation is an effective and attractive method for the utilization of captured and stored CO2. It has versatile applications in different fields. One of the applications presented in this study was investigation of the efficiency of carbonation of Ca(OH)2 derived from waste eggshell to remove heavy metals from wastewater. Cadmium (Cd(II)) and lead (Pb(II)) were the target heavy metals for this study. Three parameters were studied: Ca(OH)2 dosage, initial Cd(II) and Pb(II) concentration, and CO2 flow rate. The optimum conditions were 3 g/L of Ca(OH)2, 100 mg/L of initial metal concentration and 1 L/min of CO2 flow rate where the removal efficiencies were found to be 99.99% and 99.63% for Cd(II) and Pb(II) respectively. The phase transformation has also been detected by XRD, FTIR and TGA/DTA analysis. All the results showed a transformation of Ca(OH)2 to CaCO3 (calcite) due to complete carbonation. The transfer of CO2 during calcite formation in the presence of Pb(II) and Cd(II) was slightly retarded by a retarding factor of 0.06 and 0.09 respectively. The carbonation process was also applied to real wastewater and the performance was effective although it had very low concentrations of cadmium and lead. Precipitation of metal carbonate was the dominant mechanism for the removal of heavy metals.

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KW - Final concentration

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