Impact of secondary generated minerals on toxic element immobilization for air pollution control fly ash of a municipal solid waste incinerator

Hiroki Kitamura, Astryd Viandila Dahlan, Yu Tian, Takayuki Shimaoka, Takashi Yamamoto, Fumitake Takahashi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Impacts of secondary generated minerals on mineralogical and physical immobilization of toxic elements were investigated for chelate-treated air pollution control (APC) fly ash of a municipal solid waste incinerator. Scanning electron microscope (SEM) observation showed that ettringite was generated after the moistening treatment with/without chelate. Although ettringite can incorporate toxic elements into its structure, elemental analysis by energy dispersive X-ray could not find concentrated points of toxic elements in ettringite structure. This implies that mineralogical immobilization of toxic element by the encapsulation to ettringite structure seems to be limited. Physical immobilization was also investigated by SEM observation of the same APC fly ash particles before and after the moistening treatment. The transfer of soluble elements was inhibited only when insoluble minerals such as gypsum were generated and covered the surface of fly ash particles. Neoformed insoluble minerals prevented soluble elements from leaching and transfer. However, such physical immobilization seems to be limited because insoluble mineral formation with surface coverage was monitored only one time of more than 20 observations. Although uncertainty owing to limited samples with limited observations should be considered, this study concludes that mineralogical and physical immobilization of toxic elements by secondary minerals is limited although secondary minerals are always generated on the surface of APC fly ash particles during chelate treatment.

Original languageEnglish
Pages (from-to)20700-20712
Number of pages13
JournalEnvironmental Science and Pollution Research
Volume25
Issue number21
DOIs
Publication statusPublished - Jul 1 2018

Fingerprint

Coal Ash
Solid Waste
Air pollution control
Refuse incinerators
Poisons
Municipal solid waste
Air Pollution
Fly ash
municipal solid waste
pollution control
fly ash
Immobilization
Physical Restraint
immobilization
Minerals
atmospheric pollution
chelate
mineral
secondary mineral
Wetting

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Impact of secondary generated minerals on toxic element immobilization for air pollution control fly ash of a municipal solid waste incinerator. / Kitamura, Hiroki; Dahlan, Astryd Viandila; Tian, Yu; Shimaoka, Takayuki; Yamamoto, Takashi; Takahashi, Fumitake.

In: Environmental Science and Pollution Research, Vol. 25, No. 21, 01.07.2018, p. 20700-20712.

Research output: Contribution to journalArticle

Kitamura, Hiroki ; Dahlan, Astryd Viandila ; Tian, Yu ; Shimaoka, Takayuki ; Yamamoto, Takashi ; Takahashi, Fumitake. / Impact of secondary generated minerals on toxic element immobilization for air pollution control fly ash of a municipal solid waste incinerator. In: Environmental Science and Pollution Research. 2018 ; Vol. 25, No. 21. pp. 20700-20712.
@article{ff7396001988400f84e39fd7b8736818,
title = "Impact of secondary generated minerals on toxic element immobilization for air pollution control fly ash of a municipal solid waste incinerator",
abstract = "Impacts of secondary generated minerals on mineralogical and physical immobilization of toxic elements were investigated for chelate-treated air pollution control (APC) fly ash of a municipal solid waste incinerator. Scanning electron microscope (SEM) observation showed that ettringite was generated after the moistening treatment with/without chelate. Although ettringite can incorporate toxic elements into its structure, elemental analysis by energy dispersive X-ray could not find concentrated points of toxic elements in ettringite structure. This implies that mineralogical immobilization of toxic element by the encapsulation to ettringite structure seems to be limited. Physical immobilization was also investigated by SEM observation of the same APC fly ash particles before and after the moistening treatment. The transfer of soluble elements was inhibited only when insoluble minerals such as gypsum were generated and covered the surface of fly ash particles. Neoformed insoluble minerals prevented soluble elements from leaching and transfer. However, such physical immobilization seems to be limited because insoluble mineral formation with surface coverage was monitored only one time of more than 20 observations. Although uncertainty owing to limited samples with limited observations should be considered, this study concludes that mineralogical and physical immobilization of toxic elements by secondary minerals is limited although secondary minerals are always generated on the surface of APC fly ash particles during chelate treatment.",
author = "Hiroki Kitamura and Dahlan, {Astryd Viandila} and Yu Tian and Takayuki Shimaoka and Takashi Yamamoto and Fumitake Takahashi",
year = "2018",
month = "7",
day = "1",
doi = "10.1007/s11356-018-1959-5",
language = "English",
volume = "25",
pages = "20700--20712",
journal = "Environmental Science and Pollution Research",
issn = "0944-1344",
publisher = "Springer Science + Business Media",
number = "21",

}

TY - JOUR

T1 - Impact of secondary generated minerals on toxic element immobilization for air pollution control fly ash of a municipal solid waste incinerator

AU - Kitamura, Hiroki

AU - Dahlan, Astryd Viandila

AU - Tian, Yu

AU - Shimaoka, Takayuki

AU - Yamamoto, Takashi

AU - Takahashi, Fumitake

PY - 2018/7/1

Y1 - 2018/7/1

N2 - Impacts of secondary generated minerals on mineralogical and physical immobilization of toxic elements were investigated for chelate-treated air pollution control (APC) fly ash of a municipal solid waste incinerator. Scanning electron microscope (SEM) observation showed that ettringite was generated after the moistening treatment with/without chelate. Although ettringite can incorporate toxic elements into its structure, elemental analysis by energy dispersive X-ray could not find concentrated points of toxic elements in ettringite structure. This implies that mineralogical immobilization of toxic element by the encapsulation to ettringite structure seems to be limited. Physical immobilization was also investigated by SEM observation of the same APC fly ash particles before and after the moistening treatment. The transfer of soluble elements was inhibited only when insoluble minerals such as gypsum were generated and covered the surface of fly ash particles. Neoformed insoluble minerals prevented soluble elements from leaching and transfer. However, such physical immobilization seems to be limited because insoluble mineral formation with surface coverage was monitored only one time of more than 20 observations. Although uncertainty owing to limited samples with limited observations should be considered, this study concludes that mineralogical and physical immobilization of toxic elements by secondary minerals is limited although secondary minerals are always generated on the surface of APC fly ash particles during chelate treatment.

AB - Impacts of secondary generated minerals on mineralogical and physical immobilization of toxic elements were investigated for chelate-treated air pollution control (APC) fly ash of a municipal solid waste incinerator. Scanning electron microscope (SEM) observation showed that ettringite was generated after the moistening treatment with/without chelate. Although ettringite can incorporate toxic elements into its structure, elemental analysis by energy dispersive X-ray could not find concentrated points of toxic elements in ettringite structure. This implies that mineralogical immobilization of toxic element by the encapsulation to ettringite structure seems to be limited. Physical immobilization was also investigated by SEM observation of the same APC fly ash particles before and after the moistening treatment. The transfer of soluble elements was inhibited only when insoluble minerals such as gypsum were generated and covered the surface of fly ash particles. Neoformed insoluble minerals prevented soluble elements from leaching and transfer. However, such physical immobilization seems to be limited because insoluble mineral formation with surface coverage was monitored only one time of more than 20 observations. Although uncertainty owing to limited samples with limited observations should be considered, this study concludes that mineralogical and physical immobilization of toxic elements by secondary minerals is limited although secondary minerals are always generated on the surface of APC fly ash particles during chelate treatment.

UR - http://www.scopus.com/inward/record.url?scp=85046803933&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046803933&partnerID=8YFLogxK

U2 - 10.1007/s11356-018-1959-5

DO - 10.1007/s11356-018-1959-5

M3 - Article

C2 - 29754297

AN - SCOPUS:85046803933

VL - 25

SP - 20700

EP - 20712

JO - Environmental Science and Pollution Research

JF - Environmental Science and Pollution Research

SN - 0944-1344

IS - 21

ER -