Potentially toxic elements in bottom ash from hazardous waste incinerators: an integrated approach to assess the potential release in relation to solid-phase characteristics

Dung, Trần Thị Thu; Vassilieva, Elvira; Golreihan, Asefeh; Phung, Nguyen Ky; Swennen, Rudy; Cappuyns, Valérie

doi:10.1007/s10163-016-0505-0

Cited by 6 publications

(11 citation statements)

References 29 publications

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“…However, the high extractability of Cd, Pb, Zn, and Cu can be a combination of both high stability of the acetate complexes and the drop of pH during extractions. In both samples, Co and Ni were released in similar amounts (15-17% for AS1 and 25-27% for AS2, respectively) possibly because they originate from the same host phases, namely Fe-alloys or Fe-oxides [19].…”

Section: Single Extractionsmentioning

confidence: 80%

“…Increased Cu leaching from MSWI bottom ash by DOC complexation was observed by [42,43]. Cu in AS1 exhibited a slightly higher mobility at alkaline pH values (9-11) compared to neutral pH, which can be related to the fact that Cu forms organometal complexes with dissolved organic matter in the leachates of sample AS1 at high pH [19]. Unfortunately, data of DOC in the leachates are not available; hence, the possible effects of complexation with DOC could not be evaluated in the present study.…”

Section: Potential Release Of Trace Elements Based On Different Extramentioning

confidence: 90%

“…A study of ash from coal combustion, Nugteren (2008) [31] reported that As, Cd, and Mo are belonging to the group of elements which are associated with calcium oxides and sulfates. However, FEG-EPMA analyses of the bottom ash samples indicated that Mo (in AS1) was related to Fe-bearing phases, while As and Cd could not be observed during solid-phase characterization with FEG-EPMA [19]. The extractability of Cu (AS1 and AS2) and Pb (AS2) was quite high compared to other trace elements.…”

Section: Single Extractionsmentioning

confidence: 91%

“…After sampling, the BA materials were stored in plastic bags and brought to KU Leuven, Belgium for further treatment and laboratory analysis. More details about sampling and sample pretreatment and the determination of chemical and mineralogical composition of the samples can be found elsewhere [19]. In general, the composition of BA varies greatly and depends on the input material and the applied incineration technology.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…However, data on the composition of BA from hazardous waste incinerators in Vietnam, as well as the potential release of trace elements from these materials are rather scarce, even though such studies provide essential information to select the most sustainable management options for this kind of waste, and eventually also contribute to the protection of the environment. In the present study, BA samples that were previously partly characterized using chemical, mineralogical, and physical approaches [19] were further studied through a complementary extraction/leaching approach with focus on the potential release of trace elements under influence of acidification and complexation. Single extraction with ammonium-EDTA (0.05 mol·L −1 ) and CH 3 COOH (0.43 mol·L −1 ), which are commonly applied to soils and sediments, were performed.…”

Section: Introductionmentioning

confidence: 99%

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Release of Trace Elements from Bottom Ash from Hazardous Waste Incinerators

et al. 2018

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Bottom ash is the major by-product of waste incineration and can contain trace elements (As, Cd, Co, Cu, Cr, Mo, Ni, Pb, and Zn) with concentrations up to thousands of mg·k −1 . In this study, a combination of different extractions and leaching tests (i.e., CH 3 COOH and ammonium-EDTA (Ethylenediaminetetraacetic acid) extractions and pH stat leaching tests) was used to investigate the potential release of trace elements from bottom ash samples derived from hazardous waste incineration plants. Although large variations have been found in the release of trace elements by different extractions, in general, the highest concentrations of most trace elements (except As and Mo) were released with the CH 3 COOH extraction, whereas the release of As and Mo was highest with the ammonium-EDTA extraction. Kinetics of element release upon acidification based on a pH stat leaching test at pH 4 could be related to the solid-phase speciation of some selected trace elements. The relatively high-potential mobility and elevated total concentrations of some trace elements imply a threat to the environment if these bottom ashes are not treated properly. Results of the present study may be useful to develop potential treatment strategies to remove contaminants and eventually recover metals from bottom ash.

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Section: Single Extractionsmentioning

confidence: 80%