Molybdenum speciation in asphaltite bottom ash (Seguruk, SE Anatolia, Turkey)

Aydın, Işıl; Aydın, Fırat; Hamamcı, Candan

doi:10.1016/j.fuel.2011.09.013

Cited by 21 publications

(22 citation statements)

References 33 publications

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“…The extracts were centrifuged and the supernatants were filtered through a 0.45-μm GF/C filter membrane (Aydin et al, 2011;Gunduz et al, 2011;Aydin et al, 2012). The soluble Ni in each sample was determined.…”

Section: Digestion Procedures and Measurementmentioning

confidence: 99%

“…The environmental impact of specific metal species in fuel utilisation and waste disposal depends not only on the abundance but also on the forms of occurrence of the metal present in fuel and fuel ash (HaykiriAcma et al, 2011). The risks associated with the mobility of metals and its ecotoxicological impacts are determined by some factors such as the conditions under which the ash is kept, the total leachable metal content in ash, and the distribution of the ingredients in mineral matter (Aydin et al, 2012). The mobilisation of elements from ashes is a relatively slow process, and equilibrium between solid and liquid phases may not be attained even after long leaching times.…”

Section: Introductionmentioning

confidence: 99%

“…The mobilisation of elements from ashes is a relatively slow process, and equilibrium between solid and liquid phases may not be attained even after long leaching times. However, short-term leaching experiments are capable of giving critical information in considerably shorter interaction periods (Al-Ghouti et al, 2011;Haykiri-Acma et al, 2011;Aydin et al, 2012). Some hazardous elements are released into the air.…”

Section: Introductionmentioning

confidence: 99%

“…Elements displaying significant relationship with ash yield and ash-associated elements are inorganically associated (Baysal et al, 2002;Hamamci et al, 2003;Aydin et al, 2010a;Sia and Abdullah, 2011). The inorganic chemical composition of fuel gives information about the depositional environment, as well as the sources and differential fixation of elements during coalification processes (Hamamci et al,2003;Al-Ghouti et al, 2011;Haykiri-Acma et al, 2011;Sia and Abdullah, 2011;Aydin et al, 2012). The leaching of most cationic metals such as Pb, Cu and Ni is lower due to the alkaline nature of the ash.…”

Section: Introductionmentioning

confidence: 99%

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Chemical fractionation of nickel in asphaltite based bottom ash

Aydın

Kılınç

et al. 2013

Chemical Speciation & Bioavailability

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Asphaltite, originating from petroleum, contains many kinds of mineral elements derived from its generation. These elements exist in different forms which may change throughout the asphaltite combustion process. Chemical fractionation of nickel (Ni) is necessary for risk assessment of asphaltite based bottom ash (ABBA). This study presents the concentration and fractionation of Ni in bottom ash of asphaltite (Sirnak, SE Anatolia, Turkey). Determination of total Ni in ash was performed in two stage microwave-acid digestion followed by inductively coupled plasma optical emission spectrometry (ICP-OES). Dry ashing is used for the almost complete elimination of organic materials prior to analyte determination. A seven-step sequential extraction process to fractionation of Ni from ABBA was investigated. Total Ni concentration in the ABBA was found to be 568.15 mg kg -1 .

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Section: Digestion Procedures and Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chemical fractionation of nickel in asphaltite based bottom ash

Aydın

Kılınç

et al. 2013

Chemical Speciation & Bioavailability

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“…6 The definition of species is based on several different levels of the atomic and molecular structure where chemical forms of the same element are manifest. [7][8][9][10][11][12] Thallium is obtained as a by-product during the production of basic metals such as zinc. It acts together with cadmium during the production of zinc.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Three Sequential Extraction Methods for the Determination of Iron, Manganese, and Thallium in Asphaltite Samples

Bilgin¹,

Fidan²,

Aydın³

et al. 2020

At.Spectrosc.

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Asphaltite, which is based on petroleum, contains many elements that exist in different forms. In this study, the BCR sequential extraction (BCRSE), Tessier sequential extraction (TSE) and Stover sequential extraction (SSE) procedures were applied for the determination of Fe, Mn and Tl in different forms (exchangeable, carbonates, bound to organic and sulfide, and residual content) in the structure of asphaltite. The statistical relations between the metal values of the three different methods were determined and recommendations are given for the enrichment of these economically valuable elements from asphaltite samples. The most abundant form of Fe (%), Mn (mg kg-1) and Tl (mg kg-1) follows the order: reducible (2.28), residual (75.85) and residual (81.99) with BCRSE method; carbonates (2.46), residual (79.21) and residual (79.75) with TSE method; carbonates (2.36), residual (67.34) and residual (46.93) with SSE method. The Fe, Mn and Tl speciation scheme gives quantitative knowledge of toxicity, bioavailability, mobility, leachability and bioaccumulation, etc., for asphaltite. A comparison of the three methods shows that the TSE method is shorter and more economical, while SSE gives more detailed information about the chemical structure of the substances, and the BCRSE has reducible (as oxides) fractions for the metals. This is the first time that a comparison of the three extraction methods was carried out on asphaltites and reported. The certified reference material (CRM) NIST-1633b Coal Fly Ash was used to verify the accuracy of the method, and whether the results are in good agreement with the certified values.

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