A novel and sustainable technique to immobilize lead and zinc in MSW incineration fly ash by using pozzolanic bottom ash

Nag, Mitali; Shimaoka, Takayuki

doi:10.1016/j.jenvman.2022.117036

Cited by 13 publications

(4 citation statements)

References 38 publications

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“…Landfilling is one of the oldest waste management methods (Adamcová, 2019;Sadhasivam, Sheik Mohideen & Alankar, 2020) and the dominant waste disposal method (Ma et al, 2022); however, there are increasing efforts to develop other waste disposal methods. Above all, this concerns the energy use of waste and recycling (Hahladakis & Iacovidou, 2019;Mukherjee, Denney, Mbonimpa, Slagley & Bhowmik, 2020;Shah, Srivastava, Mohan-ty & Varjani, 2021). Despite the development of other waste disposal methods, the current state allows concluding that some waste will always be disposed of in landfills (Vaverková, 2019).…”

Section: Landfilling As a Methods Of Waste Managementmentioning

confidence: 99%

Assessment of Selected Landfill Impacts on Selected Segments of the Environment – A Case Study

Vaverková¹

2023

Acta. Sci. Pol. Architectura

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Landfilling is the oldest method of waste management. A number of biological, chemical, and physical reactions occur at the landfills, which cause a threat to the environment. For this reason, landfill monitoring is necessary, and biomonitoring is increasingly beginning to be used. The aim of this study is to (i) determine some effects of the landfill on the surrounding environment, (ii) analysis of plant bioindicators and (iii) biomonitoring based on the occurrence of plant species producing allergenic pollen. Furthermore, plants producing fruits and seeds were also analysed. During biomonitoring, no serious effects of the landfill on the surrounding environment were detected. The plant species found were evaluated based on the frequency of occurrence, pollination vector, distribution of fruits and seeds, and intensity of allergen effects. Thanks to the occurrence of plant allergens, there is a potential risk of the spread of allergens to the landfill surroundings. Furthermore, some species of non-native and invasive plants were found on the active part of the landfill. These species spread their seeds and fruits, and they pose a potential risk to the ecosystems.

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Section: Landfilling As a Methods Of Waste Managementmentioning

confidence: 99%

Assessment of Selected Landfill Impacts on Selected Segments of the Environment – A Case Study

Vaverková¹

2023

Acta. Sci. Pol. Architectura

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“…Therefore, scholars began to explore the application of low-cost solid waste materials in heavy metal-contaminated soil areas. Mitali Nag et al [ 10 ] used pozzolanic bottom ash to solidify heavy metals at room temperature, but its dependence on an alkaline environment limits its application in seasonal frozen soil areas. Zhang et al [ 11 ] used alkali-activated zeolite/MSWI fly ash to explore the effect of different temperatures on the solidification of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Solidification/Stabilization of Chromium-Contaminated Soils by Polyurethane during Freeze–Thaw Cycles: Mechanical, Leaching and Microstructure Characterization

Ma,

Zheng,

Chen

et al. 2024

Materials

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The treatment of chromium-contaminated soil in seasonal frozen soil areas has been the subject of recent interest. Polyurethane (PU), as a polymer material with excellent freeze–thaw resistance and abrasion resistance, has the potential to solidify Chromium-Contaminated soil in seasonal frozen soil areas. However, there is a lack of research on the mechanism of PU involved in solidifying/stabilizing chromium-contaminated soil in seasonal frozen regions from the perspective of pore structure and functional group coordination bonds. In this study, the leaching behavior of PU with different contents under different freeze–thaw cycles was analyzed, and the mechanism of PU in seasonal frozen regions was explored from the perspective of pores and functional groups by combining various microscopic characterization methods. The results show that PU can effectively resist the deterioration of chromium-contaminated soil after freeze–thaw cycles and can better prevent the harm of secondary leaching. The leaching concentration of chromium ion is only 1.09 mg/L, which is below China’s regulatory limits. PU is beneficial for inhibiting the expansion of ice crystals in chromium-contaminated soil in seasonal frozen soil areas. PU solidifies chromium by physical encapsulation and complexation reactions. The amide functional groups, methyl-CH3 and isocyanate groups in PU play a leading role in the complexation with chromium. Although the freeze–thaw cycle will destroy the coordination bond between the PU functional group and chromium, chromium cannot break through the bond of PU film. This study confirmed the feasibility of using PU to solidify Chromium-Contaminated soil in seasonal frozen soil areas, which can provide research support and reference for in situ engineering in the future.

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“…Recently, with the widespread attention on waste resource uti-lization, some scholars have used types of waste for fly ash stabilization, such as MSWI bottom ash (BA) [34], the mixture of MSWI BA, flue gas desulphurization (FGD) residues and coal fly ash [35], the mixture of MSWI BA, FGD residues and silica fume [36], etc., after using these types of waste for fly ash stabilization, the leaching concentration of Pb and Zn in the fly ash was reduced. Leachate generated during the waste stockpiling process has been used as a resource due to the high concentration of humic substances and metal elements [37], some scholars [38,39] have studied the resource utilization of leachate, such as a substrate for bio-electrochemical systems, anaerobic digestion into biogas, recycling as fertilizers, etc., however, fewer studies have used leachate for fly ash stabilization.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of stabilizing Cd, Pb, and Ni in MSWI fly ash using leachate as an alternative stabilizer

Zha,

Qi,

Chen

et al. 2024

Environmental Engineering Research

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For the synergistic disposal of municipal solid waste incineration (MSWI) fly ash and leachate, MSWI fly ash was stabilized using leachate, sodium sulfide (Na2S), and sodium diethyldithiocarbamate (DDTC) separately or simultaneously. Results show that the leaching concentration of Cd, Ni, and Pb can be reduced when leachate is used alone but exceeds the landfill admission contents. The leaching concentration of heavy metals were lower than the threshold of the pollution control standard of Chinese garbage landfill (GB 16889-2008) after curing for 14d when DDTC was beyond 1.5%, and Na2S more than 10% except for Pb. The results of orthogonal experiment showed that the lowest leaching concentration was got at 5-fold dilution of leachate, 3% Na2S and 0.8% DDTC, and DDTC was the most influential factor. The leachate can be utilized as a partial stabilizer for stabilization of fly ash. After chemical stabilization, the crystal structure of fly ash changed little, and the surface was densified. The analysis of two-dimensional correlation spectroscopy results showed that the different order between the major function groups of fly ash and stabilizers was got, may be related to chelation, chemical reactions, and precipitation.

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A novel and sustainable technique to immobilize lead and zinc in MSW incineration fly ash by using pozzolanic bottom ash

Cited by 13 publications

References 38 publications

Assessment of Selected Landfill Impacts on Selected Segments of the Environment – A Case Study

Assessment of Selected Landfill Impacts on Selected Segments of the Environment – A Case Study

Solidification/Stabilization of Chromium-Contaminated Soils by Polyurethane during Freeze–Thaw Cycles: Mechanical, Leaching and Microstructure Characterization

Feasibility of stabilizing Cd, Pb, and Ni in MSWI fly ash using leachate as an alternative stabilizer

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