Heavy metal stabilization in municipal solid waste incineration flyash using heavy metal chelating agents

Jiang, Jianguo; Wang, Jun; Xu, Xiaonan; Wang, Wei; Deng, Zhiyong

doi:10.1016/j.jhazmat.2004.05.030

Cited by 91 publications

(42 citation statements)

References 4 publications

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“…People have been exploring many ways to solve these problems, the widely applied methods are composting, landfill and incineration [1]. Because dredged sediments are very soft soils that have very poor geotechnical properties [2],there are not suitable for landfill [3] before those disposal process, solidification/stabilization is the most common way of sediment pretreatment.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Curing Effect of Dredged Sediments with Three Types of Curing Agents

Yan

Zhu

Qiu

et al. 2016

MATEC Web of Conferences

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Abstract. Sediment solidification technology is widely used to dispose dredged sediment, three types of curing agents were used in this study to solidified the dredged sediment from shallows in Nantong with three types of curing agents: JY, ZL and FJ. The results showed that the optimal additive amounts of these three curing agents were 140g JY, 16g ZL, 2.0g FJ per 1000g of the dredged sediment respectively, their 28d USC were up to 2.48 MPa, 2.96 MPa and 3.00 MPa. JY has obvious early strength effect, which of FJ is not that obvious, but the later-stage strength of sediment solidified by FJ are relatively higher.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Curing Effect of Dredged Sediments with Three Types of Curing Agents

Yan

Zhu

Qiu

et al. 2016

MATEC Web of Conferences

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“…The stability of heavy metal immobilization by chelate treatment has been concerned. For example, immobilization effect of chelate reagent is reported to be higher than inorganic reagent [Jiang et al 2004]. Two-year experiments using landfill-simulating columns demonstrated that less than 0.001 wt% of Pb was leached from chelate-treated MSWI fly ash [Shimaoka et al 1998].…”

Section: Introductionmentioning

confidence: 99%

Geochemically structural characteristics of municipal solid waste incineration fly ash particles and mineralogical surface conversions by chelate treatment

Kitamura

Sawada

Shimaoka

et al. 2015

Environ Sci Pollut Res

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Leaching behaviors of heavy metals contained in municipal solid waste incineration (MSWI) fly ash have been studied well. However, micro-characteristics of MSWI fly ash particles are still uncertain and might be non-negligible to describe their leaching behaviors. Therefore, this study investigated micro-characteristics of MSWI fly ash particles, especially their structural properties and impacts of chelate treatment on surface characteristics. According to SEM observations, raw fly ash particles could be categorized into four types based on their shapes. Because chelate treatment changed the surface of fly ash particles dramatically owing to secondary mineral formations like ettringite, two more types could be categorized for chelate-treated fly ash particles. Acid extraction experiments suggest that fly ash particles, tested in this study, consist of Si-base insoluble core structure, Al/Ca/Si-base semi-soluble matrices inside the body, and KCl/NaCl-base soluble aggregates on the surface. Scanning electron microscope (SEM) observations of the same fly ash particles during twice moistening treatments showed that KCl/NaCl moved under wet condition and concentrated at different places on the particle surface. However, element mobility depended on secondary mineral formations. When insoluble mineral like gypsum was generated and covered the particle surface, it inhibited element transfer under wet condition. Surface characteristics including secondary mineral formation of MSWI fly ash particles are likely non-negligible to describe trace element leaching behaviors.

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“…At disposal in landfills and ash ponds, once exposed to moisture, leaching from the ash will occur and provide a pathway for toxic compounds to reach groundwater supplies (Jianguo and Wei, 1998;Jianguo et al, 2004). Furthermore, incorrect treatment can cause transformation of the heavy metals and can pollute the soil and air (Jianguo and Wei, 1998;Jianguo et al, 2004;Wang et al, 2010). The heavy metals in fly ash do not degrade naturally.…”

Section: Introductionmentioning

confidence: 99%

Immobilization and volume reduction of heavy metals in municipal solid waste fly ash using nano-size calcium and iron-dispersed reagent

Mallampati

Mitoma

Simion

et al. 2015

Journal of the Air & Waste Management Association

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Heavy metal stabilization in municipal solid waste incineration flyash using heavy metal chelating agents

Cited by 91 publications

References 4 publications

Experimental Study on the Curing Effect of Dredged Sediments with Three Types of Curing Agents

Experimental Study on the Curing Effect of Dredged Sediments with Three Types of Curing Agents

Geochemically structural characteristics of municipal solid waste incineration fly ash particles and mineralogical surface conversions by chelate treatment

Immobilization and volume reduction of heavy metals in municipal solid waste fly ash using nano-size calcium and iron-dispersed reagent

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