Heavy metals removal/stabilization from municipal solid waste incineration fly ash: a review and recent trends

Ajorloo, Mojtaba; Ghodrat, Maryam; Scott, Jason; Strezov, Vladimir

doi:10.1007/s10163-022-01459-w

Cited by 34 publications

(10 citation statements)

References 121 publications

(255 reference statements)

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“…incineration, thermal desorption) eventually breaking down the toxic pollutant to simple inorganic compounds such as CO 2 , methane (CH 4 ) and water (H 2 O). When the pollutant includes hazardous heavy metals, combustion technologies will not destroy them but most metals with an exception of mercury and other volatile metals will be retained in the ash in which case application of stabilization technologies discussed above become necessary (78,79).…”

Section: Technologies Designed To Destroy the Hazardous Pollutant Suc...mentioning

confidence: 99%

Soil pollution and agriculture in sub-Saharan Africa: State of the knowledge and remediation technologies

Tindwa

Singh

2023

Front. Soil Sci.

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The sub-Saharan Africa (SSA) region bears the blunt of soil pollution mainly due to-haphazard disposal and gross mismanagement of a wide assortment of pollutants generated from within and outside the region. Pollution of agricultural soils in the region is so intense that out of the 80 countries substantially affected by land degradation (soil pollution, inclusive) in the world, 36 are found in Africa, the SSA, in particular. Pollution of soils has resulted into a significant reduction in their ability to support crop growth and yield apart from jeopardizing safety and security of agricultural produce in SSA. Consequences of pollution of soils on human health in the region are inadequately reported, but they range from non-fatal, life-changing effects like skin damage due to acute, invariably fatal incidences of exposure to milt by chronic effects. We show in this review, that while science and advancement in technology has provided a multitude of alternative techniques to pollution control and remediation of affected soils, such techniques are largely inaccessible to most SSA countries. There is also lack of coordination on development, enforcement and implementation of legal and political instruments to tackle the growing risk of pollution to human health from soil contamination across the SSA region. Couple with this, lack of data on status of soil pollution in most SSA countries affects the countries’ capacity to devise and plan policies that can help reduce soil pollution. Countries need to maximize efforts to reverse the status of already polluted pieces of land through strengthening remediation programs, research on how best to gather, maintain and complement soil pollution data and actions that inform decision-making.

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Section: Technologies Designed To Destroy the Hazardous Pollutant Suc...mentioning

confidence: 99%

Soil pollution and agriculture in sub-Saharan Africa: State of the knowledge and remediation technologies

Tindwa

Singh

2023

Front. Soil Sci.

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“…The characteristics of WtE fly ash may differ from one country to another. The concentration of toxic elements in fly ash is strongly influenced by the characteristics of MSW feedstock, operating conditions and flue gas treatment facilities [33].…”

Section: Environmental Risk Assessmentmentioning

confidence: 99%

Characterization, risk assessment, and potential utilization of fly ash from PLTSa Merah Putih at Bantargebang, Bekasi, Indonesia

Robbani,

Shoiful,

Hendrayanto

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Municipal solid waste incineration (MSWI) has been adopted in Indonesia to reduce the volume and mass of municipal solid waste. However, as a by-product of waste combustion, fly ash generation cannot be avoided. It can cause an environmental problem if not managed properly. Hence, this study aims to investigate the characteristics of fly ash generated from Indonesia’s first waste-to-energy incineration pilot plant and its potential utilization. Fly ash was characterized using X-Ray fluorescence (XRF), BET surface area measurement, pore size distribution (PSD), scanning electron microscopy with energy-dispersive spectrometry (SEM-EDS), and X-ray diffraction (XRD). The characterization results showed that calcium was predominant, around 28%, followed by titanium, silica, iron, and aluminum, with values of 7.10%, 5.70%, 4.40%, and 4.30%, respectively. These results demonstrated that MSW incineration fly ash was classified as a very active high-calcium fly ash. The surface structure of fly ash was flaky and complex, with some irregular material. The particle size distribution of fly ash shows that the diameters of most particles were nearly 12 μm. The specific surface area of fly ash was 3.06 m2/g, the total-pore volume was 0.01 cm3/g, and the average pore size was 11.82 nm. In addition, the environmental risk assessment was evaluated using the toxicity characteristic leaching procedure (TCLP). TCLP concentrations of heavy metals, including arsenic, barium, beryllium, cadmium, chromium hexavalent, copper, lead, mercury, nickel, selenium, and zinc, were lower than the regulatory level, indicating a low environmental risk. Therefore, it has great potential for utilization as a paving block mixture material.

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“…The ability of H 2 SO 4 to dissolve many metals other than Ca and Pb is due to the precipitation of their sulfates as secondary compounds. ,,− Regrettably, the leaching behavior is strongly influenced by the type and pH of the acid. Organic acids such as formic, acetic, lactic and oxalic acids are not effective as metal leachers compared to inorganic acids, which also dissolve some impurities such as iron, magnesium and aluminum, resulting in inadequate heavy metal removal . Hence, it can be combined with aqueous washing to remove soluble salts, which can improve the efficiency of acid extraction to remove heavy metals .…”

Section: Treatment and Disposal Of Heavy Metals In Fly Ashmentioning

confidence: 99%

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

Xiao,

Huang,

Cheng

et al. 2023

Energy Fuels

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With the global industrialization process and socioeconomic development, the amount of municipal solid waste (MSW) generated is growing significantly. With the growth trend of municipal solid waste, incineration is widely used for waste treatment but produces a large amount of municipal solid waste incineration fly ash, which contains heavy metals that can seriously harm human health and the ecological environment. In this Review, the current situation of MSWI fly ash disposal is reviewed, and the technologies for harmless disposal and resource utilization of heavy metals in MSWI fly ash are summarized, including solidification stabilization, leaching extraction, heat treatment, combination methods, etc. We meticulously summarized the recent progress of various incineration fly ash disposal technologies, analyzed the difficulties and solutions in formulating various feasible technical strategies, and compared their potential in the safe, environmentally friendly, and economical utilization of MSW fly ash resources. Furthermore, we also provide an outlook on the potential challenges and prospects of future progress in the harmless disposal and resource recycling of fly ash.

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Heavy metals removal/stabilization from municipal solid waste incineration fly ash: a review and recent trends

Cited by 34 publications

References 121 publications

Soil pollution and agriculture in sub-Saharan Africa: State of the knowledge and remediation technologies

Soil pollution and agriculture in sub-Saharan Africa: State of the knowledge and remediation technologies

Characterization, risk assessment, and potential utilization of fly ash from PLTSa Merah Putih at Bantargebang, Bekasi, Indonesia

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

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