Water repellents for the leaching control of heavy metals in municipal solid waste incineration fly ash

Ogawa, Narihito; Amano, Takahito; Nagai, Yoshitaka; Hagiwara, Kenta; Honda, Takayuki; Koike, Yuya

doi:10.1016/j.wasman.2021.02.016

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…However, F − , Cl − , Acp, AcPy and Ant also presented moderate loadings, and these components are usually common species in combustion products. Sr was possibly from the soot of waste incineration [ 77 ], and Ba can be detected in large quantities in wood waste incineration products [ 78 ]. F − and Cl − were the major components in the combustion products of plastic products.…”

Section: Resultsmentioning

confidence: 99%

Chemical Characteristics and Cytotoxicity to GC-2spd(ts) Cells of PM2.5 in Nanjing Jiangbei New Area from 2015 to 2019

Liu

Chen

et al. 2023

Toxics

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PM2.5 is an air pollutant with complex components. After entering the body through respiration, PM2.5 can not only cause respiratory diseases, but also break through the blood–testis barrier and influence the reproductive system. PM2.5 with different components may result in different toxic effects. In the first five years of Nanjing Jiangbei New Area, industrial transformation would change the concentration and chemical fraction of PM2.5 in the local environment to a certain extent. In this study, PM2.5 collected in Nanjing Jiangbei New Area every autumn and winter from 2015 to 2019 was analyzed. PM2.5 concentration generally decreased year by year. The large proportion of secondary inorganic ions indicated the presence of secondary pollution at the sampling site. PM2.5 was mainly emitted from fossil fuel combustion and vehicle exhaust. The cytotoxicity of PM2.5 samples was evaluated by PM2.5 exposure to mouse spermatocytes (GC-2spd(ts) cells). Cell viability was relatively low in 2016 and 2018, and relatively high in 2017 and 2019. Reactive oxygen species levels and DNA damage levels followed similar trends, with an overall annual decrease. The cytotoxicity of PM2.5 on GC-2spd(ts) cells was significantly correlated with water-soluble ions, water-soluble organic carbon, heavy metals and polycyclic aromatic hydrocarbons (p < 0.01). According to principal component analysis and multiple linear regression, fossil fuel combustion, secondary transformation of pollutants and construction dust were identified as the major contributors to cytotoxic effects, contributing more than 50%.

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Section: Resultsmentioning

confidence: 99%

Chemical Characteristics and Cytotoxicity to GC-2spd(ts) Cells of PM2.5 in Nanjing Jiangbei New Area from 2015 to 2019

Liu

Chen

et al. 2023

Toxics

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“…The potential risks of heavy metal and radioactive Cs elution from fly ash decrease as a result of the solubilization treatment. The chemical state of radioactive Cs in fly ash can be utilized for a water repellent treatment 31,32 of MSWI fly ash.…”

Section: Discussionmentioning

confidence: 99%

“…9,29 Currently, we have been studying the elution suppression method using of heavy metals and radioactive Cs in MSWI fly ash samples as an actual sample collected from the incineration facility. 31,32 The results of chemical-state analysis will be useful information for elucidating the water repellent and cement solidification mechanism.…”

Section: Leaching Behavior Of Heavy Metals and Radioactive Csmentioning

confidence: 99%

Chemical State Analysis of Heavy Metals and Radioactive Cesium in Municipal Solid Waste Incineration Fly Ash Contaminated with Radioactive Cesium Released by the FDNPP Accident

et al. 2021

Self Cite

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The chemical states of heavy metals and radioactive Cs were estimated in fly ash sampled at Fukushima prefecture, Japan. Estimating the speciation of incinerator fly ash is important to ensure an appropriate and efficient management of fly ash generated from disaster-related waste. In this study, fly ash collected at a waste incineration facility in Fukushima prefecture was treated using a sequential extraction test. The test results indicated that the solubility behavior of radioactive Cs was similar to that of NaCl and KCl, and approximately 60% of radioactive Cs was included as watersoluble chloride compounds in the fly ash sample. Most heavy metals eluted in three fractions, in the extraction steps for carbonate-bound, free oxide, and bound to organic matter species. The chemical states of elements in the three non-watersoluble fractions and residue showed minimal elution into the environment. Therefore, most heavy metals in the fly ash exhibited minimal elution into the environment.

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“…solidification, geo-polymerization). [12][13][14][15] Toxicity leaching tests were often conducted to compare the effects of heavy metal removal or immobilization. The most commonly used method was TCLP (Toxicity Characteristics Leaching Procedure) recommended by US EPA.…”

Section: Introductionmentioning

confidence: 99%

Controlling reactions during heavy metal leaching from municipal solid waste incineration fly ash

Chen

Wang

et al. 2023

JSCS

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This research aimed to characterize the physical, chemical properties of municipal solid waste incineration fly ash and investigate the leaching of heavy metals during Toxicity Characteristics Leaching Procedure (TCLP) process. To understand the leaching behavior, concentrations of heavy metals, chloride, sulfate and calcium at various leaching time was monitored together with pH of the leaching solution. Results showed that chemical compositions of fly ashes led to differences in leaching environment. For the two fly ashes under study, one resulted in a leaching environment of pH of 10-12 while the other had a pH about 6-7. Based on pH, anions and cations concentrations, Minteq software was employed to investigate the speciation of heavy metals. Results showed that the shift in precipitation/dissolution balance of carbonate and hydroxides of heavy metals could explain the fluctuation in metal concentrations during the leaching process. This indicates that leaching was probably controlled by these reactions. On the other hand, addition of EDTA changed the controlling reactions. Chelating reactions between heavy metals and EDTA led to much higher leaching toxicity of heavy metals showing that presence of chelating organics in natural environment may facilitate heavy metal leaching.

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Water repellents for the leaching control of heavy metals in municipal solid waste incineration fly ash

Cited by 14 publications

References 18 publications

Chemical Characteristics and Cytotoxicity to GC-2spd(ts) Cells of PM2.5 in Nanjing Jiangbei New Area from 2015 to 2019

Chemical Characteristics and Cytotoxicity to GC-2spd(ts) Cells of PM2.5 in Nanjing Jiangbei New Area from 2015 to 2019

Chemical State Analysis of Heavy Metals and Radioactive Cesium in Municipal Solid Waste Incineration Fly Ash Contaminated with Radioactive Cesium Released by the FDNPP Accident

Controlling reactions during heavy metal leaching from municipal solid waste incineration fly ash

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