Details

Autor(en) / Beteiligte

• Mai, Ngo Tra
• Thi Tham, Trinh
• Thuy, Hang Nguyen Thi
• Thi, Hong Khuat
• Lien, Nghiem Thi Ha
• Nghia, Nguyen Trong
• Hang, Phan Thi Thanh
• Toan, Vu Duc
• Tap, Van Huu
• Van Thang, Duong
• Ly, Do Thao

Titel

Residual, sequential extraction, and ecological risk assessment of some metals in ash from municipal solid waste incineration, Vietnam

Ist Teil von

• Green processing and synthesis, 2024-04, Vol.13 (1), p.58514-36

Ort / Verlag

Berlin: De Gruyter

Erscheinungsjahr

2024

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Incineration plants for electricity generation have offered a solution to the challenges of domestic solid waste treatment in many countries. However, their emissions, fly ash (FA) and bottom ash (BA), have had a detrimental impact on environmental quality. This study investigated the morphology, element composition, and concentration of metals in FA and BA from municipal solid waste incineration plants using scanning electronic microscopy/energy-dispersive X-ray and inductively coupled plasma mass spectrometry techniques. It also evaluated the distribution ratios of metal species across five fractions: exchangeable, carbonate-bound, oxide-bound, organic-bound, and sulfide-bound, and residual. The total metal content in both FA and BA was comparable, with calcium having the highest concentration (28,170–135,130 mg·kg dry weight) and silver having the lowest (5.26–19.3 mg·kg dry weight). However, the percentage proportion of metals differed between the extracted fractions. Except for cadmium in FA, ecological risk assessment indicated low direct bioavailability and potential risk of metals in both FA and BA. These findings contribute to the hazard assessment of FA and BA generated from waste incinerators and provide a scientific basis for developing treatment techniques for this type of waste.