Comparison of leaching characteristics of heavy metals in APC residue from an MSW incinerator using various extraction methods

Chiang, Kung Yuh; Tsai, Chen Chiu; Wang, Kuen Sheng

doi:10.1016/j.wasman.2008.04.006

Cited by 33 publications

(14 citation statements)

References 27 publications

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“…In the literature, several studies are available concerning its leaching behaviour (Eighmy et al, 1995;Bosshard et al, 1996;Iretskaya et al, 1999;Ibáñez et al, 2000;Van Herck et al, 2000;Nagib and Inoue, 2000;Youcai et al, 2002;Shim et al, 2005;Hammy et al, 2005;Mizutani et al, 1996Mizutani et al, , 2007Li et al, 2007) produced during incineration processes has also been frequently considered (Johnson et al, 1996;Meima and Comans, 1997aKersten et al, 1998;Ibáñez et al, 2000;Meima et al, 2002;Dijkstra et al, 2006Dijkstra et al, , 2008. Some studies addressed inorganic components (Eighmy et al, 1995;Kida et al, 1996;Van der Bruggen et al, 1998;Van Herck et al, 2000;van der Sloot et al, 2001;Abbas and Steenari, 2001;Kosson et al, 2002;Sabbas et al, 2003;Astrup et al, 2005Astrup et al, , 2006aCornelis et al, 2008;Chiang et al, 2009) while others involved organic compounds (Fischer et al, 1992;Hsi and Yu, 2007;Yasuhara and Katami, 2007).…”

Section: Introductionmentioning

confidence: 99%

The influence of pH on the leaching behaviour of inorganic components from municipal solid waste APC residues

Bordado²,

2009

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a b s t r a c tThe influence of pH on the leaching behaviour of air pollution control (APC) residues produced in municipal solid waste incineration (MSWI) is addressed in this study. The residue is considered hazardous waste, and in accordance with their chemical properties, the leaching of contaminants into the environment is the main concern. Several leaching tests can be used for research studies or regulatory purposes, where a wide variety of conditions may be tested. Our work deals mainly with the leaching behaviour of toxic heavy metals (Pb, Cd, Zn, Cr, Ni, Cu) and inorganics associated with soluble salts (Na, K, Ca, Cl). The main goal is to obtain an overview of the leachability of APC residues produced in a Portuguese MSWI process. Among the different variables that may have influence on the leaching behaviour, pH of the leachant solution is the most important one, and was evaluated through pH static tests. The acid neutralization capacity (ANC) of the residue was also determined, which is in the range of 6.2-6.8 meq g À1 (for pH = 7) and 10.1-11.6 meq g À1 (for pH = 4). The analysis of the leaching behaviour is particularly important when the leaching is solubility controlled. The amphoteric behaviour of some elements was observed, namely for Pb and Zn, which is characterized through high solubilization at low and high pH and moderate or low solubility at neutral or moderate high pH. The solubility curves for Pb, Cd, Zn, Cr, Ni and Cu as a function of pH were obtained, which are very useful for predicting the leaching behaviour in different scenarios. The solubility of K and Na reveals to be nearly independent of the solution pH and the released amount is mainly availability-controlled. Moreover, the pH static test showed that Cl À is the most pH-independent species. The APC residue turns out to be a hazardous waste because of the high leaching of lead and chloride. On the other hand, leaching of elements like cadmium, nickel and copper is limited by the high pH of the residue, and as long as the waste keeps its ANC, the risk of mobilization of these elements is low.

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Section: Introductionmentioning

confidence: 99%

The influence of pH on the leaching behaviour of inorganic components from municipal solid waste APC residues

Bordado²,

2009

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“…In comparison, the highest Pb solubility was observed in the GJST test (13%), as opposed to 10 and 3% from TCLP and water extractions. Low solubility of Pb from urban airborne particulate matter, and fly ash in extraction tests has also been reported (Chiang et al 2009;Voutsa et al 2002;Kierczak et al 2008). Despite the fact that only 8% of Cr in the MFs and NMFs is associated as soluble forms in the TCLP test, their potential bioavailability based on the GJST test was higher.…”

Section: Discussionmentioning

confidence: 80%

“…However, it is hard to directly compare the soluble metals in the different extraction tests due to variation in extracting condition such as extraction time, solid/liquid ratio, and extraction solution pH. Extraction tests demonstrated that trace metals extracted from soils are mostly influenced by a series of factors, including (1) pH of extraction solution, (2) pH-dependent precipitation or adsorption/ desorption, and (3) the geochemical phases of heavy metals in the soil (Al-Abed Souhail et al 2006;Chiang et al 2009;Madrid et al 2007;Kierczak et al 2008). Because the water extraction has no buffering capacity for the studied slightly alkaline soils, it resulted in lower water-extractable concentrations of trace metals.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies found that metals solubility or bioaccessibility was highly correlated to the metal speciation in the soils. It was found that TCLP test could extract all water-soluble/exchangeable metal fractions plus a small portion of carbonatebound fraction, and GJST test can dissolve all watersoluble/exchangeable, carbonate-bound, oxide-bound, organic-bound fractions, and part of the residual fraction (Al-Abed Souhail et al 2006;Chiang et al 2009;Dermatas et al 2006). The significant difference in solubility of trace metals among three extraction tests ( Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The mobility of trace metals in the contaminated soils is commonly assessed using a variety of environmental risk assessment procedures. Among them, extraction tests were commonly used and provided groundwork for assessing leaching characteristics so as to select appropriate treatment and cleaning techniques (Lin and Chang 2006;Al-Abed Souhail et al 2006;Chiang et al 2009;Dermatas et al 2006;Voutsa et al 2002;Madrid et al 2007;Kierczak et al 2008). Among available methods for the evaluation on leaching of soil-bound metals under different conditions, the toxicity characteristic leaching procedure (TCLP) and physiological based extraction test (PBET) were widely used (USEPA 1992;Ruby et al 1996).…”

Section: Introductionmentioning

confidence: 99%

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Enrichment and solubility of trace metals associated with magnetic extracts in industrially derived contaminated soils

Wang

Chen

2012

Environ Geochem Health

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Magnetic fractions (MFs) in industrially derived contaminated soils were extracted with a magnetic separation procedure. Total, soluble, and bioaccessible Cr, Cu, Pb and Zn in the MFs and non-magnetic fractions (NMFs) were analyzed using aqua regia and extraction tests, such as deionized water, toxicity characteristic leaching procedure (TCLP), and gastric juice simulation (GJST) test. Compared with the non-magnetic fractions, soil MFs were enriched with Fe, Mn, Pb, Cd, Cr, Cu, and Ni. Extraction tests indicated that soil MFs contained higher water, TCLP, and GJST-extractable Cr, Cu, Pb, and Zn concentrations than the soil NMFs. The TCLP-extractable Pb concentration in the MFs exceeded the USEPA hazardous waste criteria, suggesting that soil MFs have a potentially environmental pollution risk. Solubility of trace metals was variable in the different extraction tests, which has the order of GJST > TCLP > water. TCLP test showed Cu and Zn were more mobile than Cr and Pb while bioaccessibility of trace metal defined by GJST test showed the order of Cu ≈ Cr ≈ Zn > Pb. These findings suggested that the MFs in the industrially derived contaminated soils had higher possibility of polluting water bodies, and careful environmental impact assessment was necessary.

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Leachate Properties of the Stabilized MSW Incineration APC Residues in Pilot-Scale Mono-landfill

Qiu

Hua

et al. 2018

Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2

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Comparison of leaching characteristics of heavy metals in APC residue from an MSW incinerator using various extraction methods

Cited by 33 publications

References 27 publications

The influence of pH on the leaching behaviour of inorganic components from municipal solid waste APC residues

The influence of pH on the leaching behaviour of inorganic components from municipal solid waste APC residues

Enrichment and solubility of trace metals associated with magnetic extracts in industrially derived contaminated soils

Leachate Properties of the Stabilized MSW Incineration APC Residues in Pilot-Scale Mono-landfill

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