Journal
WASTE MANAGEMENT
Volume 82, Issue -, Pages 62-70Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2018.10.014
Keywords
MSWI fly ash; Electrolytic manganese residue; Geopolymeric system; Solidification/Stabilization
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Funding
- Chong Qing Municipal Solid Waste Resource Utilization AMP
- Treatment Collaborative Innovation Center [Shljzyh2017-001]
- National Natural Science Foundation of China [51568010]
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MSWI fly ash (MSWI FA) and electrolytic manganese residue (EMR) were successfully co-disposed by use of a geopolymeric system. Alkaline products of MSWI FA and NaOH were used to elicit chemical reactions to promote solidification. The best performing formulation of EMR-based geopolymer for immobilization of heavy metals was composed of 75 wt% MSWI FA and 25 wt% EMR with NaOH solution (7.5 M)/solid of 0.5. Solidification was most effective for the heavy metals: Pb > Cu > Cr > Zn > Mn, respectively. The EMR-based geopolymer had high structural stability likely due to the high ratio of SiO2/Al2O3. The Solidification/Stabilization (S/S) mechanism for heavy metals of geopolymers is likely due to alkaline conditions and geopolymeric encapsulation, highlighting the utility and feasibility of this approach. (C) 2018 Elsevier Ltd. All rights reserved.
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