The recovery of ca and zn from the municipal solid waste incinerator fly ash

Chen Piao Yen; Song Yan Zhou; Yun Hwei Shen

doi:10.3390/su12219086

The recovery of ca and zn from the municipal solid waste incinerator fly ash

Chen Piao Yen, Song Yan Zhou, Yun Hwei Shen

Department of Resources Engineering

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

1 Citation (Scopus)

Abstract

The treatment and disposal of municipal solid waste incineration (MSWI) fly ash containing significant amounts of dissolvable salts and heavy metals is a seriously challenge. At present, the common treatment method for MSWI fly ash in Taiwan is the cement-based stabilization/solidification (S/S) process. In this work, an integrated hydrometallurgical process for the treatment of MSWI fly ash was evaluated. Ca was first recovered by combining water washing and ion exchange sequentially. Meanwhile, Zn in the water-washed fly ash was recovered by combining acid leaching and ion exchange sequentially. Combining the water washing efficiency of 30% on raw ash and the acid leaching efficiency of 40% on pre-washed ash, a total of 58% mass reduction rate of fly ash was achieved. In addition, an 80% Zn and 58% Ca recovery was achieved.

Original language	English
Article number	9086
Pages (from-to)	1-12
Number of pages	12
Journal	Sustainability (Switzerland)
Volume	12
Issue number	21
DOIs	https://doi.org/10.3390/su12219086
Publication status	Published - 2020 Nov 1

All Science Journal Classification (ASJC) codes

Geography, Planning and Development
Renewable Energy, Sustainability and the Environment
Management, Monitoring, Policy and Law

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abstract = "The treatment and disposal of municipal solid waste incineration (MSWI) fly ash containing significant amounts of dissolvable salts and heavy metals is a seriously challenge. At present, the common treatment method for MSWI fly ash in Taiwan is the cement-based stabilization/solidification (S/S) process. In this work, an integrated hydrometallurgical process for the treatment of MSWI fly ash was evaluated. Ca was first recovered by combining water washing and ion exchange sequentially. Meanwhile, Zn in the water-washed fly ash was recovered by combining acid leaching and ion exchange sequentially. Combining the water washing efficiency of 30% on raw ash and the acid leaching efficiency of 40% on pre-washed ash, a total of 58% mass reduction rate of fly ash was achieved. In addition, an 80% Zn and 58% Ca recovery was achieved.",

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The recovery of ca and zn from the municipal solid waste incinerator fly ash

Abstract

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