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Exploration of the potential capacity of fly ash and bottom ash derived from wood pellet-based thermal power plant for heavy metal removal.

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Title: Exploration of the potential capacity of fly ash and bottom ash derived from wood pellet-based thermal power plant for heavy metal removal.
Authors: Park, Jong-Hwan1 (AUTHOR), Eom, Ju-Hyun1 (AUTHOR), Lee, Su-Lim1 (AUTHOR), Hwang, Se-Wook1 (AUTHOR), Kim, Seong-Heon2 (AUTHOR), Kang, Se-Won3 (AUTHOR), Yun, Jin-Ju3 (AUTHOR), Cho, Ju-Sik3 (AUTHOR), Lee, Young-Han4 (AUTHOR), Seo, Dong-Cheol1 (AUTHOR) dcseo@gnu.ac.kr
Source: Science of the Total Environment. Oct2020, Vol. 740, pN.PAG-N.PAG. 1p.
Abstract: This study was conducted to explore the potential capacity for the removal of heavy metals from the fly ash (FA) and bottom ash (BA) emitted by wood pellet thermal power plants. Fly ash consists of inorganic compounds such as CaSiO 3 , P 2 O 5 , and K 2 O, whereas BA shows properties very similar to the biochar derived from organic biomass. The adsorption properties of both FA and BA for Cd were described well by the Langmuir and pseudo-second-order models, and the maximum adsorption capacity of FA for Cd was 4.2 times higher than that of BA. The results indicate that FA can be applied to the treatment of wastewater that contains heavy metals over pH range from 2–6; however, BA is considered to be most effective for application with wastewater that contains heavy metals at a pH of 5–6. Study of the mechanism concluded that the adsorption of Cd by FA is dominated by the formation of Cd 2 SiO 4 complexes by chemical reactions between CaSiO 3 and Cd ions as well as via the precipitation of Cd(OH) 2 in the neutral and alkaline solutions that is caused by the dissolution of K. It was found that the adsorption of Cd by BA was influenced by the binding of functional groups (C C and C OH), coupled CaCO 3 dissolution-CdCO 3 precipitation reaction and ion exchange between some minerals with Si and Cd ions in weakly acidic conditions. Results indicate that the FA and BA emitted from wood pellet thermal power plants have high potential for heavy metal removal, and their practical use in the purification and restoration of heavy metals could be an effective way to reduce the waste produced by power plants and clean the environment. Unlabelled Image • Fly ash and bottom ash are discharged from wood pellet-based thermal power plant (WTPP). • The main crystalline mineral of fly ash derived from WTPP was CaSiO 3 and K 2 O. • Bottom ash derived from WTPP was mostly composed of carbon and had a structure similar to biochar. • Cd adsorption by FA was dominated by the ion exchange between CaSiO 3 and Cd ions as well as Cd(OH) 2. • Cd adsorption by BA was influenced by C C and C OH, CdCO3 precipitation and Si ion exchange. [ABSTRACT FROM AUTHOR]
Copyright of Science of the Total Environment is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Exploration of the potential capacity of fly ash and bottom ash derived from wood pellet-based thermal power plant for heavy metal removal.
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  Data: <searchLink fieldCode="AR" term="%22Park%2C+Jong-Hwan%22">Park, Jong-Hwan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Eom%2C+Ju-Hyun%22">Eom, Ju-Hyun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Su-Lim%22">Lee, Su-Lim</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hwang%2C+Se-Wook%22">Hwang, Se-Wook</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Seong-Heon%22">Kim, Seong-Heon</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kang%2C+Se-Won%22">Kang, Se-Won</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yun%2C+Jin-Ju%22">Yun, Jin-Ju</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cho%2C+Ju-Sik%22">Cho, Ju-Sik</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Young-Han%22">Lee, Young-Han</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Seo%2C+Dong-Cheol%22">Seo, Dong-Cheol</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dcseo@gnu.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Science+of+the+Total+Environment%22">Science of the Total Environment</searchLink>. Oct2020, Vol. 740, pN.PAG-N.PAG. 1p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study was conducted to explore the potential capacity for the removal of heavy metals from the fly ash (FA) and bottom ash (BA) emitted by wood pellet thermal power plants. Fly ash consists of inorganic compounds such as CaSiO 3 , P 2 O 5 , and K 2 O, whereas BA shows properties very similar to the biochar derived from organic biomass. The adsorption properties of both FA and BA for Cd were described well by the Langmuir and pseudo-second-order models, and the maximum adsorption capacity of FA for Cd was 4.2 times higher than that of BA. The results indicate that FA can be applied to the treatment of wastewater that contains heavy metals over pH range from 2–6; however, BA is considered to be most effective for application with wastewater that contains heavy metals at a pH of 5–6. Study of the mechanism concluded that the adsorption of Cd by FA is dominated by the formation of Cd 2 SiO 4 complexes by chemical reactions between CaSiO 3 and Cd ions as well as via the precipitation of Cd(OH) 2 in the neutral and alkaline solutions that is caused by the dissolution of K. It was found that the adsorption of Cd by BA was influenced by the binding of functional groups (C C and C OH), coupled CaCO 3 dissolution-CdCO 3 precipitation reaction and ion exchange between some minerals with Si and Cd ions in weakly acidic conditions. Results indicate that the FA and BA emitted from wood pellet thermal power plants have high potential for heavy metal removal, and their practical use in the purification and restoration of heavy metals could be an effective way to reduce the waste produced by power plants and clean the environment. Unlabelled Image • Fly ash and bottom ash are discharged from wood pellet-based thermal power plant (WTPP). • The main crystalline mineral of fly ash derived from WTPP was CaSiO 3 and K 2 O. • Bottom ash derived from WTPP was mostly composed of carbon and had a structure similar to biochar. • Cd adsorption by FA was dominated by the ion exchange between CaSiO 3 and Cd ions as well as Cd(OH) 2. • Cd adsorption by BA was influenced by C C and C OH, CdCO3 precipitation and Si ion exchange. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Science of the Total Environment is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.scitotenv.2020.140205
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              Text: Oct2020
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