Solidification/stabilization of fly and bottom ash from medical waste incineration facility

Anastasiadou, Kalliopi; Christopoulos, Konstantinos; Mousios, Epameinontas; Gidarakos, Evangelos

doi:10.1016/j.jhazmat.2011.05.027

Cited by 127 publications

(88 citation statements)

References 15 publications

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“…Cu content in S wash was 3.1 times of that in S1 1 ml , which might incorporate into the Si-O matrix and enhance stability of Cu in the FA1 wash . Theoretically, the alkali chloride was leached after water-washing extraction, and the volatilization of heavy metal was inhibited [25]. In fact, some minor elements were removed by 10-30%, while the heavy metal content (Zn, Cr, Ni) in water-extracted fly ash was increased due to soluble salt leaching (Na, K, Cl, S) [26].…”

Section: Washing Influencementioning

confidence: 99%

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Fang

Chen

et al. 2017

Fuel

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Keywords:MSW incineration fly ash Heavy metals Volatilization and leaching behavior DC arc plasma CaO -Al 2 O 3 -SiO 2 (CAS) A B S T R A C T Three fly ash samples collected from different waste incinerators were vitrified using a direct current arc plasma furnace at 1250-1400°C. The influence of water-wash extraction and wrapping pretreatment on the volatilization and leaching behavior of heavy metals was investigated. Results showed: After thermal arc plasma treatment, the volume reduction and weight loss of fly ash were in the range of 68.7-82.2% and 23.8-56.7%, respectively. The residual fractions (wt.%) of heavy metals in slag are in the following sequence: Cr < Ni < Cd < Pb < Cu < Zn. Water-washing could reduce the volatilization rate of heavy metals due to some volatile salts removed by washing, while wrapping of fly ash could most effectively resist heavy metals against volatilizing, especially for Zn and Ni. The possible CaO -Al 2 O 3 -SiO 2 (CAS) ratio for successful melting of fly ash is suggested to be CaO in range of 20-48%, Al 2 O 3 in range of 10-15%, and SiO 2 in range of 40-65%. Moreover, toxicity characteristic leaching procedure results showed that the leaching of heavy metals in slags was much lower than the standard limit of toxicity characteristic leaching procedure (TCLP).

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Section: Washing Influencementioning

confidence: 99%

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Fang

Chen

et al. 2017

Fuel

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“…Stabile mass is formed of which does not come to leaching of hard metals and disposed material is geotechnical stabile [22,23].…”

Section: Introductionmentioning

confidence: 99%

Evolution of coal ash solidification properties with disposal site depth and age, 'Gacko' Thermal power plant case

Knežević¹,

Nišić²,

Beatovic³

et al. 2017

Tehnika

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“…Mineral additions to Portland cement materials have been found to offer an ecological solution to safe disposal of waste materials [12]. The mechanical properties of the medical waste incineration bottom ash using different amounts of ordinary Portland cement (OPC) as binder have been investigated by Anastasiadou et al, [17]. The solidified matrix showed that cement was able to immobilize the heavy metals found in fly and bottom ash [2].…”

Section: Introductionmentioning

confidence: 99%

Hospital Ash Waste-Ordinary Portland Cement Concrete

Elinwa¹

2016

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Abstract:This work is part of the on-going research work in the Civil Engineering Department of Abubakar Tafawa Balewa University, Bauchi Nigeria. The work is on characterizing and utilization of hospital waste ash (HWA) in the production of concrete. This work is important in the light of the recent happenings in Nigeria, where cases of Ebola and Lassa fever diseases have been mentioned and most recently, the fear of the Zika disease. The need for adequate study on the data on management, handling and disposal of hospital waste, is of paramount importance to prevent relapse A study on the incineration ash was undertaken in order to assess the material's adequacy for concrete production. The results showed that the ash contains relatively high percentage of CaO (47%), which has cementing value and thus, can be used for cement manufacture. The hydration characteristics showed it is pozzolanic in nature and the setting times values showed that HWA can be used as a retarder, especially for hot weather concreting. The ash was used as partial replacements for cement in proportions of 0 to 40% by weight of cement to make concrete cubes that were cured for periods of 3 days to 90 days. The results showed that water absorption increased with increase in the replacement levels, while the compressive strength decreased accordingly. The work was taken further by developing statistical relationships between the slump, water absorption and compressive strengths.

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Solidification/stabilization of fly and bottom ash from medical waste incineration facility

Cited by 127 publications

References 15 publications

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Evolution of coal ash solidification properties with disposal site depth and age, 'Gacko' Thermal power plant case

Hospital Ash Waste-Ordinary Portland Cement Concrete

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