Synthesis of mesoporous silica materials from municipal solid waste incinerator bottom ash

Liu, Zhen-Shu; Li, Wenkai; Huang, Chun-Yung

doi:10.1016/j.wasman.2014.02.016

Cited by 41 publications

(18 citation statements)

References 26 publications

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“…In Table 1, the final pH values and metal concentrations of the BA, PFA, and BA leachates are shown. The final pH values of the various leachates increased substantially owing to the presence of alkaline substances, including SiO 2 , CaO, Al 2 O 3 , Fe 2 O 3 , and MgO [8,39]. Moreover, the concentrations of Cd and Cr in leachate B from PFA and the Cd concentration in leachate B from BFA both exceeded the limits specified in the Taiwanese regulations (Cd: 1; Pb: 5; Cr: 5; and Cu: 15 mg/L).…”

Section: Resultsmentioning

confidence: 99%

Cellular Mutagenicity and Heavy Metal Concentrations of Leachates Extracted from the Fly and Bottom Ash Derived from Municipal Solid Waste Incineration

Chen

Liu

Wun

et al. 2016

IJERPH

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Two incinerators in Taiwan have recently attempted to reuse the fly and bottom ash that they produce, but the mutagenicity of these types of ash has not yet been assessed. Therefore, we evaluated the mutagenicity of the ash with the Ames mutagenicity assay using the TA98, TA100, and TA1535 bacterial strains. We obtained three leachates from three leachants of varying pH values using the toxicity characteristic leaching procedure test recommended by the Taiwan Environmental Protection Agency (Taiwan EPA). We then performed the Ames assay on the harvested leachates. To evaluate the possible relationship between the presence of heavy metals and mutagenicity, the concentrations of five heavy metals (Cd, Cr, Cu, Pb, and Zn) in the leachates were also determined. The concentrations of Cd and Cr in the most acidic leachate from the precipitator fly ash and the Cd concentration in the most acidic leachate from the boiler fly ash exceeded the recommended limits. Notably, none of the nine leachates extracted from the boiler, precipitator, or bottom ashes displayed mutagenic activity. This data partially affirms the safety of the fly and bottom ash produced by certain incinerators. Therefore, the biotoxicity of leachates from recycled ash should be routinely monitored before reusing the ash.

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Section: Resultsmentioning

confidence: 99%

Cellular Mutagenicity and Heavy Metal Concentrations of Leachates Extracted from the Fly and Bottom Ash Derived from Municipal Solid Waste Incineration

Chen

Liu

Wun

et al. 2016

IJERPH

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“…However, processing of mesoporous silica materials from incinerator bottom ash is obscure. The ash composition, pretreatment procedures, and hydrothermal synthesis conditions would affect the purity and yield rate of Manuscript Incinerator bottom ash containing a large amount of silica can be used as a raw material for synthesizing mesoporous silica materials [14], [15]. This would not only increase the recycling rate of bottom ash but also reduce the cost of mesoporous silica materials.…”

Section: Introductionmentioning

confidence: 99%

“…Seeking new recycling techniques to increase the recovery rate and value added of bottom ash is important. Therefore, mesoporous silica materials synthesized from incinerator bottom ash was investigated in our previous study [14].…”

Section: Introductionmentioning

confidence: 99%

“…Our previous study verified that the high specific surface area of 992 m 2 /g of mesoporous silica could been synthesized from incineration bottom ash. The mesoporous silica also has been used for the removal of heavy metals from waste water [14]. It has potential for the synthesis of mesoporous silica from bottom ash and the application of mesoporous silica in the removal of pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Mesoporous Silica Materials from Incineration Bottom Ash for the Removal of Toluene

Liu¹,

Lan²

2019

IJESD

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In Taiwan, most of the municipal solid waste is incinerated, and more than 930 thousand tons of bottom ash is produced in 2014. Incineration bottom ash contains major element of silicon that could be as a silicon source for the synthesis of mesoporous materials. Our previous study investigated the conditions for alkaline fusion to extract silica from incinerator bottom ash and verified that the high specific surface area of mesoporous silica could been synthesized from bottom ash. To expand the application of mesoporous silica materials synthesized from bottom ash, the effects of operation conditions of adsorbent weight (0.2, 0.5, 0.8, 1.5 g), adsorption temperature (25, 30, 35°C) and toluene concentrations (900, 1100, 1300, 1500 ppm) on toluene removal were determined in this study. Moreover, the gas flow and the oxygen content were 500 sccm and 10%, respectively. The mesoporous materials synthesized from bottom ash possessed the best adsorption capacity of toluene (ca. 124 mg g-1) at the toluene concentration of 1100 ppm and at the reaction temperature of 25°C. The results showed that the mesoporous silica prepared with incinerator bottom ash have potential to be used as an adsorbent for the removal of toluene.

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“…In recent years and for economical and environmental considerations, researchers have being studying the possibility of replacing these laboratory reagents with raw materials that are widely available and inexpensive. Therefore, studies have reported the synthesis of mesoporous materials from halloysite [15], diatomite [16], kaolin [17], bentonite [18,19], coal fly ash [20], bottom ash [21,22], iron-ore tailing [23], copper-ore tailing [24], photonic waste [25,26], resin ash [27], husk ash [28,29], sedge ash [30], miscanthus ash [31], and volclay [32].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Lewis Acidity between Al-MCM-41 Pure Chemicals and Al-MCM-41 Synthesized from Bentonite

Ali-Dahmane

Brahmi

Hamacha

et al. 2019

Bull. Chem. React. Eng. Catal.

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This study focused on the Lewis acidity of Al-MCM-41 prepared from bentonite (Al-MCM-bentonite) as silica and aluminum source simultaneously. This acidity was compared with Al-MCM-41 synthesized from pure chemicals reagents (Al-MCM-standard). Structural analysis showed that the substitution of the silicon atom by the aluminum atom decreases the structural order of Al-MCM-standard, whereas Al-MCM-bentonite has a better structural organization. The Lewis acidity of the Al-MCM-bentonite was evaluated in allylation reaction of benzaldehyde with allyltrimethylsilane and pyridine adsorption experiments. The results showed that the difference in acidity between Al-MCM-standard and Al-MCM-bentonite is due to the amount of aluminum incorporated into the framework of our mesoporous materials. According to the EDX analysis, the incorporation of aluminum in Al-MCM-standard (Si/Al = 13.47) is more important than in Al-MCM-bentonite (Si/Al = 43.64). This explains the low acidity of Al-MCM-bentonite, and the moderate yields in the allylation reactions of benzaldehyde with allyltrimethylsilane.

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Synthesis of mesoporous silica materials from municipal solid waste incinerator bottom ash

Cited by 41 publications

References 26 publications

Cellular Mutagenicity and Heavy Metal Concentrations of Leachates Extracted from the Fly and Bottom Ash Derived from Municipal Solid Waste Incineration

Cellular Mutagenicity and Heavy Metal Concentrations of Leachates Extracted from the Fly and Bottom Ash Derived from Municipal Solid Waste Incineration

Synthesis of Mesoporous Silica Materials from Incineration Bottom Ash for the Removal of Toluene

Comparison of Lewis Acidity between Al-MCM-41 Pure Chemicals and Al-MCM-41 Synthesized from Bentonite

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