H2S adsorption by municipal solid waste incineration (MSWI) fly ash with heavy metals immobilization

Wu, Huanan; Zhu, Yu; Bian, Songwei; Ko, Jae Hac; Li, Sam Fong Yau; Xu, Qiyong

doi:10.1016/j.chemosphere.2017.12.068

Cited by 58 publications

(23 citation statements)

References 34 publications

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Section: Influence Of Bed Height On Sulphur Adsorption Capacitysupporting

confidence: 74%

“…The maximum adsorption capacity is around 5.9 mg/g for the H2S removal of 20 ppm(v) in a simulated biogas mixture ( Figure 9). This result is due to the specific surface increasing and concentration of alkali and alkaline earth metals, as demonstrated in literature [31][32][33]. These results highlight how the adsorption capacity is It is necessary to observe that this very high improvement in removal performances may be related to the non-optimal conditions of activation (heat losses from the furnace, granulometry, real heating rate transient).…”

Section: Influence Of Bed Height On Sulphur Adsorption Capacitymentioning

confidence: 51%

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H2S Removal with Sorbent Obtained from Sewage Sludges

et al. 2020

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Biochar obtained from sewage sludges are adopted for biogas cleaning. Sewage sludges are treated considering temperature, dwell time, activating agent, heating, and flow rate. The best performances achieved are registered considering the char produced at 400 °C using CO2 as an activating agent with a dwell time of 2 h. The adsorption capacity for the biogas cleaning CH4/CO2/H2S (20 ppm(v)) increased from 1.3 mg/g to 5.9 mg/g with the bed height. Future research with chemical activation processes will be made to improve the adsorption capacity achieved to produce cheaper sorbents than commercial ones.

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Section: Influence Of Bed Height On Sulphur Adsorption Capacitysupporting

confidence: 74%

Section: Influence Of Bed Height On Sulphur Adsorption Capacitymentioning

confidence: 51%

H2S Removal with Sorbent Obtained from Sewage Sludges

et al. 2020

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“…In China, the number of incinerating plants increased from 69 in 2006 to 898 in 2018, and they are expected to be responsible for over 10 million tons of waste in 2019, probably because incinerating municipal solid waste was recommended as one of the sources for electricity [4]. The hazardous solid wastes collected from air pollution preventing equipment, containing Dioxin [5], lead (Pb), chromium (Cr), cadmium (Cd), copper (Cu) and zinc (Zn) [6], have the risk of becoming secondary pollutants if municipal solid waste incineration (MSWI) fly ash (FA) is not properly treated. Therefore, many physical and chemical treatment systems are used for the solidification or stabilization of MSWI in China before transferring to landfill.…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of the Heavy Metal Leaching Behavior of MSWI-FA Added Alkali-Activated Materials Bricks by Using Different Leaching Test Methods

Xu¹,

Zhao²,

Qiu³

et al. 2019

IJERPH

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Alkali-activated materials (AAMs) not only have the potential to replace cement applications in architecture and civil engineering, but also have an excellent effect on the stabilization solidification of hazardous industrial wastes. This study used two types of municipal solid waste incineration fly ash (MSWI-FA)—grate firing fly ash (GFFA) and fluidized bed fly ash (FBFA)—as AAMs brick raw materials. It is discovered from this study that AAMs bricks with different weight ratios of GFFA and FBFA can both meet the required standard of GB21144-2007 (Solid concrete brick). From the results obtained from the four leaching tests, the equilibrium pH of the leachate varies, resulting in significant differences in the leaching of heavy metals in Raw GFFA, Raw FBFA, and AAMs bricks with GFFA and FBFA. The AAMs brick with the addition of GFFA and FBFA has an alkali activation system to encapsulate heavy metals. By comparing the results obtained from the CEN/TS 14429 leaching behavior test and the four batch leaching tests, it was found that the most influential factors for the heavy metal leaching concentration are whether the heavy metal has been solidified/stabilized in the samples. GFFA and FBFA tend to have consistent characteristics after being activated by alkali to form AAMs bricks. This can be confirmed by the acid neutralization ability concentrated on a specific pH range. The results obtained from CEN/TS14429 verified that the AAMs bricks with the addition of GFFA and FBFA have excellent environmental compatibility and that it provides a comprehensive evaluation on the environmental compatibility of the test materials and products. This demonstrated that the MSWI-FA is suitable for used as alkali-activated materials and its products have the potential to be commercially used in the future.

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“…H 2 S is one of several odorous gases arising from industrial effluents such as municipal WWTPs, landfill sites, and petrochemical industries [55]. The average odor threshold of H 2 S is reported at 7 to 9 ppb [56]. In a lab-scale fixed-bed column investigation conducted by Ren et al [54], H 2 S adsorption onto AlS was examined and the AlS adsorption capacity was determined to be 374.2 mg of H 2 S/g.…”

Section: Novel Use Of Als For H2s Purificationmentioning

confidence: 99%

Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways

Zhao

Xie

et al. 2021

Processes

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Alum sludge (AlS) refers to the inevitable by-product generated during the drinking water purification process, where Al-salt is used as a coagulant in the water industry. It has long been treated as “waste”, while landfill is its major final disposal destination. In fact, AlS is an underutilized material with huge potential for beneficial reuse as a raw material in various wastewater treatment processes. In the last two decades, intensive studies have been conducted worldwide to explore the “science” and practical application of AlS. This paper focuses on the recent developments in the use of AlS that show its strong potential for reuse in wastewater treatment processes. In particular, the review covers the key “science” of the nature and mechanisms of AlS, revealing why AlS has the potential to be a value-added material. In addition, the future focus of research towards the widespread application of AlS as a raw material/product in commercial markets is suggested, which expands the scope for AlS research and development.

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H2S adsorption by municipal solid waste incineration (MSWI) fly ash with heavy metals immobilization

Cited by 58 publications

References 34 publications

H2S Removal with Sorbent Obtained from Sewage Sludges

H2S Removal with Sorbent Obtained from Sewage Sludges

The Evaluation of the Heavy Metal Leaching Behavior of MSWI-FA Added Alkali-Activated Materials Bricks by Using Different Leaching Test Methods

Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways

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