Contaminants of concern (CoCs) pivotal in assessing the fate of MSW incineration bottom ash (MIBA): First results from India and analogy between several countries

Following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident caused by the 2011 Tōhoku earthquake and tsunami, radioactive caesium (r-Cs) was detected in the ash generated by municipal solid waste (MSW) incineration facilities in Fukushima Prefecture. This has led to concerns of r-Cs leaching and subsequent environmental contamination during recycling or landfill disposal. Therefore, it is crucial that the relevant authorities have a thorough understanding of r-Cs leaching behavior to establish suitable prevention methods. In this study, we collected r-Cs-contaminated fly and bottom ash (FA and BA) samples from five MSW incineration facilities in Fukushima Prefecture and conducted tests to clarify their basic physical properties and r-Cs leaching properties. We also examined the possibility of preventing r-Cs leaching by adding 5 wt% acid clay to the FA. FA had greater chloride content and r-Cs leaching rate than BA and was found to absorb moisture and deliquesce when stored under high-humidity conditions. However, the addition of acid clay effectively prevented r-Cs leaching upon contact with moisture. From the results, we propose some specific recommendations to counter the leaching of r-Cs from FA at MSW incineration facilities, which will limit r-Cs leaching during recycling or landfill processes.

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Effect of leaching behaviour by quenching of bottom ash from MSW incineration

Waste Management & Research ◽

10.1177/0734242x10387848 ◽

2010 ◽

Vol 29 (10_suppl) ◽

pp. S39-S47 ◽

Cited By ~ 3

Author(s):

Franco Marchese ◽

Giuseppe Genon

Keyword(s):

Bottom Ash ◽

Msw Incineration ◽

Leaching Behaviour

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In Furnace Capture of Heavy Metals by Sorbents during Simulated MSW Incineration

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.1590 ◽

2011 ◽

Vol 356-360 ◽

pp. 1590-1596 ◽

Cited By ~ 2

Author(s):

Xin Ye Wang ◽

Ya Ji Huang ◽

Zhao Ping Zhong ◽

Yong Xing Wang ◽

Liang Liang Xu

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Bottom Ash ◽

Experimental Results ◽

Tube Furnace ◽

Aqua Regia ◽

Msw Incineration ◽

Brick Powder ◽

Metal Capture

Heavy metal capture experiments were carried out in a tube furnace to investigate the effect of different sorbents and Si-Al ratios on the capture of Zn, Cu, Pb, Cd and Cr during simulated MSW incineration. The incineration bottom ash was digested by aqua regia and HCl/HNO3/HF, then determined by ICP-AES. Experimental results indicate that HCl/HNO3/HF is more suitable for the digestion of incineration bottom ash than aqua regia; the volatilization capacities of the five metals during simulated MSW incineration at 1000°C follow the sequence of Pb > Cd > Cu > Cr > Zn; zeolite and limestone have a certain efficiency to capture Zn and Cr while kaolinite has no efficiency to capture all the five metals; the addition of kaolinite and zeolite can prevent the glass and brick powder from melting which can cause the package of heavy metals, but the addition of zeolite can promote Zn and Cr to form silicate, aluminate and aluminosilicate; the mixture of SiO2and Al2O3is in favor of the adsorption of Cd and Cr, but against the adsorption of Pb and Cu compared with single SiO2or Al2O3.

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Characteristics of inorganic matter from Australian municipal solid waste processed under combustion and gasification conditions

Waste Management & Research ◽

10.1177/0734242x20966655 ◽

2020 ◽

pp. 0734242X2096665

Author(s):

Alexander Ilyushechkin ◽

Chong He ◽

San Shwe Hla

Keyword(s):

Municipal Solid Waste ◽

Trace Element ◽

Solid Waste ◽

Management Strategies ◽

Bottom Ash ◽

Chemical Species ◽

Mineral Matter ◽

Msw Incineration ◽

Inorganic Matter ◽

Thermochemical Processes

The presence and composition of ash in solid waste streams produced by the thermochemical processes can affect the further disposal or use of the waste. This study characterised the chemical species, mineralogy and trace element mobilisation in laboratory-produced ashes arising from different municipal solid waste (MSW) streams processed under reducing and oxidising atmospheres. The composition of cumulative ash samples produced under oxidising conditions was very similar to the composition of the industrial bottom ash samples produced during MSW incineration. We identified differences in mineral phase compositions and in some trace element concentrations of ashes produced under combustion and gasification conditions. Differences in concentrations of boron, barium, cadmium, chromium, copper, chlorine, molybdenum, antimony, lead, thorium and zinc in ashes associated with different MSW streams were also observed. On the basis of the concentrations of trace elements in ashes, we evaluated each MSW stream in terms of potential management strategies and use of the mineral matter remaining after combustion and gasification. Most of ashes produced from MSW can be at least classified as Class IV (secure) waste according to an Australian standard regulation guideline.

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