Utilization of waste natural fishbone for heavy metal stabilization in municipal solid waste incineration fly ash

Yue Mu, Amirhomayoun Saffarzadeh, Takayuki Shimaoka

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Waste fishbone that is a rich source of hydroxyapatite (HAP) was investigated for the stabilization of heavy metals (mainly Pb) in municipal solid waste incineration (MSWI) fly ash, which has not been particularly studied to date. In the present study, the original status of fishbone and fly ash was preserved. The stabilization was initially conducted during a leaching process (Scenario A). Greater doses of fishbone and longer contact times benefited the stabilization in this scenario, and the highest Pb stabilization efficiency reached 59.31% after a 72 h-leaching process at fishbone dose of 100% (w/w). The abundant supply of Pb relative to fishbone HAP might affect the efficient stabilization. Therefore, the influence of liquid/solid (L/S) was examined for improving the stabilization under a settling condition (Scenario B). Lower L/S conditions were beneficial to the stabilization, and the highest Pb stabilization efficiency achieved was 66.35% at L/S of 1 mL/g for 24 h of settling when fishbone dose was 50% (w/w). Additionally, as the second most leachable metal, Zn was also considerably stabilized at L/S < 1.5 mL/g (solid-like conditions) in Scenario B. Cu in the leachates of both scenarios increased in the presence of fishbone. The facilitation of Cu release undesirably hindered Pb stabilization; however, this impediment presumably occurred during the leaching process rather than settling period. The solid-like condition was found to be more favorable for using fishbone HAP on the stabilization of heavy metals in fly ash. L/S and settling period were identified as the critical factors for the efficient stabilization of Pb and Zn, respectively. It is suggested that this technique not only helps treat MSWI fly ash in a low-cost and environmental-friendly approach, but also helps reduce the problems associated with waste fishbone disposal.

Original languageEnglish
Pages (from-to)3111-3118
Number of pages8
JournalJournal of Cleaner Production
Volume172
DOIs
Publication statusPublished - Jan 20 2018

Fingerprint

Waste incineration
Municipal solid waste
incineration
Fly ash
municipal solid waste
fly ash
Heavy metals
stabilization
Stabilization
heavy metal
liquid
Hydroxyapatite
Leaching
Liquids
leaching
Incineration
facilitation
Waste disposal
waste disposal
leachate

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

Cite this

Utilization of waste natural fishbone for heavy metal stabilization in municipal solid waste incineration fly ash. / Mu, Yue; Saffarzadeh, Amirhomayoun; Shimaoka, Takayuki.

In: Journal of Cleaner Production, Vol. 172, 20.01.2018, p. 3111-3118.

Research output: Contribution to journalArticle

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abstract = "Waste fishbone that is a rich source of hydroxyapatite (HAP) was investigated for the stabilization of heavy metals (mainly Pb) in municipal solid waste incineration (MSWI) fly ash, which has not been particularly studied to date. In the present study, the original status of fishbone and fly ash was preserved. The stabilization was initially conducted during a leaching process (Scenario A). Greater doses of fishbone and longer contact times benefited the stabilization in this scenario, and the highest Pb stabilization efficiency reached 59.31{\%} after a 72 h-leaching process at fishbone dose of 100{\%} (w/w). The abundant supply of Pb relative to fishbone HAP might affect the efficient stabilization. Therefore, the influence of liquid/solid (L/S) was examined for improving the stabilization under a settling condition (Scenario B). Lower L/S conditions were beneficial to the stabilization, and the highest Pb stabilization efficiency achieved was 66.35{\%} at L/S of 1 mL/g for 24 h of settling when fishbone dose was 50{\%} (w/w). Additionally, as the second most leachable metal, Zn was also considerably stabilized at L/S < 1.5 mL/g (solid-like conditions) in Scenario B. Cu in the leachates of both scenarios increased in the presence of fishbone. The facilitation of Cu release undesirably hindered Pb stabilization; however, this impediment presumably occurred during the leaching process rather than settling period. The solid-like condition was found to be more favorable for using fishbone HAP on the stabilization of heavy metals in fly ash. L/S and settling period were identified as the critical factors for the efficient stabilization of Pb and Zn, respectively. It is suggested that this technique not only helps treat MSWI fly ash in a low-cost and environmental-friendly approach, but also helps reduce the problems associated with waste fishbone disposal.",
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