Distribution Characteristics of Heavy Metals in Different Size Fly Ash from a Sewage Sludge Circulating Fluidized Bed Incinerator

Li, Yanlong; Cui, Ruoqi; Yang, Tianhua; Zhai, Zhenyu; Li, Rundong

doi:10.1021/acs.energyfuels.6b02676

Cited by 18 publications

(10 citation statements)

References 19 publications

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“…The particle size distributions did not indicate any significant trend. Even though the characteristics of fly ashes from different incineration plant types may vary strongly depending on incineration parameters, both the water content as well as the particle size distributions was in good agreement to other studies [40][41][42][43][44][45].…”

Section: General Characteristicssupporting

confidence: 90%

Municipal waste incineration fly ashes: from a multi-element approach to market potential evaluation

et al. 2020

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Background: Fly ashes from municipal solid waste incineration contain significant amounts of (technology critical) elements. Processes to recover Cu or Zn are already in practice, but it still remains difficult to evaluate the full secondary resource potential of the ashes. One reason is the absence of a worldwide comparable analytical basis for detailed market analyses. To encounter this, (i) an advice on how to analyse 65 elements after microwave-assisted digestion by ICP-OES and ICP-MS is delivered, (ii) the heterogeneity (hours to annual cycle) is evaluated for a incineration plant, (iii) leaching efficiency with three different eluents and (iv) the market potential of the elements as commodities are evaluated. Results and conclusions: Aqua regia digestion was found to be sufficient to evaluated the recovery potential; except for the mass constituents Al, Si, Sn, Ti and the trace components Cr, Hf, Nb, U and W, for which HF-containing digestions delivered better recoveries. On different time scales, ashes were very homogenous and HCl-as well as H 2 SO 4-supported leaching delivered, satisfying results within an hour (exceptions are, e.g., Bi and Sb). By applying characterisation factors of the life cycle assessment impact category "Resource depletion-minerals and metals" supplemented by the list of critical raw materials of the EU: Ag, Bi, Cd, Ga, In and Sb are most interesting elements to be recovered in future activities.

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Section: General Characteristicssupporting

confidence: 90%

Municipal waste incineration fly ashes: from a multi-element approach to market potential evaluation

et al. 2020

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“…The extractants substantially comprise of inorganic acids (H 2 SO 4 , HCl, and HNO 3 ), organic acids (citric, oxalic acids), alkali (NaOH, CaO), inorganic chemicals (e.g., ferric chloride), and a chelating agent [111]. Fang et al [107] showed that organic acids leach more trace elements, particularly Cu, Zn, Pb, and As.…”

Section: Wet Chemicalmentioning

confidence: 99%

“…Fang et al [107] showed that organic acids leach more trace elements, particularly Cu, Zn, Pb, and As. Normally, inorganic acids can accomplish a higher P extraction efficiency (> 90%) [37,105,108,111,112], where H 2 SO 4 has been widely used from an economic point of view [37]. Also, it can easily remove unwanted Ca 2+ from mixtures by the controlled precipitation of gypsum (CaSO 4 •2H 2 O).…”

Section: Wet Chemicalmentioning

confidence: 99%

A review of phosphorus recovery from different thermal treatment products of sewage sludge

Meng

Huang

et al. 2019

Waste Dispos. Sustain. Energy

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Phosphorus (P) is an indispensable element of living organisms and plays an irreplaceable role in the growth of crops. As a non-renewable element, the reserves of phosphorus rock, the primary source of phosphorus in nature, are facing the danger of exhaustion. As a phosphorus-rich solid waste, sewage sludge has gradually become a main renewable phosphorus resource. The combination of effective recycling of phosphorus and innocuous disposal of sewage sludge can not only alleviate the crisis of phosphate rock resources shortage but also reduce the environmental hazards of sewage sludge. This study reviewed the application of thermal treatment in sewage sludge disposal. Besides the advantages of reducing waste volume, decomposing organic pollutants, generating valuable byproducts, it can also significantly promote the recycling of phosphorus. Studies have shown that thermal treatment (incineration, pyrolysis, and hydrothermal) can enrich phosphorus in the products and transform the speciation of phosphorus to increase the bioavailability. The physical and chemical properties of different thermal treatment products and the speciation of phosphorus are different. The transformation and migration of phosphorus affect the efficiency of subsequent phosphorus recovery and reuse. At the same time, this study compared several general phosphorus recovery methods (wet extraction, thermochemical, and electrochemical methods), and further summarized the advantages and disadvantages of various methods and application conditions. This review summarizes recent advances in phosphorus recovery from sewage sludge, identifies challenges and knowledge gaps, and provides the foundation for future research aimed at achieving efficient, economic, and eco-friendly reclamation of phosphorus in sewage sludge.

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“…Recently, a method of interpreting TSP data was reported using a mathematical conversion ratio between inhalable and respirable particle depending on working activity and material including metal, fiber, and mineral (Wippich et al 2020). Several studies have compared chemical compositions in different size of PM from specific emission sources (Li et al 2017;Lyu et al 2017;Tian et al 2021) and however, the exact size distributions of airborne PM or metals are not yet available due to the variety of emission sources and physicochemical changes during the aging processes of particles (Li et al 2017;Lyu et al 2017;Tian et al 2021).…”

Section: Comparison Of Health Risk Potentials Through Inhalation Of Tsp-and Pm 25 -Bound Metalsmentioning

confidence: 99%

Sources of airborne particulate matter-bound metals and spatial-seasonal variability of health risk potentials in four large cities, South Korea

Choi

Lee

et al. 2022

Environ Sci Pollut Res

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Fifteen airborne particulate matter-bound metals were analyzed at 14 sites in four large cities (Seoul, Incheon, Busan, Daegu) in South Korea, between August 2013 and June 2017. Among the seven sources resolved by positive matrix factorization, soil dust and marine aerosol accounted for the largest and second largest portions in the three cities; however, in Seoul, soil dust and traffic occupied the largest and the second largest, respectively. Non-carcinogenic risk assessed by inhalation of eight metals (Cd, Co, Ni, Pb, As, Al, Mn, and V) was greater than the hazard index (HI) of 1 at four sites located at or near the industrial complexes. Cumulative incremental lifetime cancer risk (ILCR) due to exposure to five metals (Cd, Co, Ni, Pb, and As) exceeded the 10−6 cancer benchmark at 14 sites and 10−5 at six sites, which includes four sites with HI greater than 1. The largest contributor to ILCR was coal combustion in Seoul, Incheon, and Daegu, and industry sources in Busan. Moreover, industry sources were the largest contributors to non-carcinogenic risk in Seoul, Busan, and Daegu, and soil dust was in Incheon. Incheon had the highest HI in spring because of the higher contribution of soil dust sources than in other seasons. The higher ILCR in Incheon in spring and winter and higher ILCR and HI in Daegu in autumn were mainly due to the influence of industry or coal combustion sources. Statistically significant differences in the ILCR and HI values among the sampling sites in Busan and Daegu resulted from the higher contribution of industry sources at a certain site in the respective city.

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Distribution Characteristics of Heavy Metals in Different Size Fly Ash from a Sewage Sludge Circulating Fluidized Bed Incinerator

Cited by 18 publications

References 19 publications

Municipal waste incineration fly ashes: from a multi-element approach to market potential evaluation

Municipal waste incineration fly ashes: from a multi-element approach to market potential evaluation

A review of phosphorus recovery from different thermal treatment products of sewage sludge

Sources of airborne particulate matter-bound metals and spatial-seasonal variability of health risk potentials in four large cities, South Korea

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