Determination of trace elements in coal and coal fly ash by joint-use of ICP-AES and atomic absorption spectrometry

Iwashita, Akira; Nakajima, Tsunenori; Takanashi, Hirokazu; Ohki, Akira; Fujita, Yoshio; Yamashita, Toru

doi:10.1016/j.talanta.2006.03.053

Cited by 48 publications

(37 citation statements)

References 18 publications

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“…According to this, the element concentrations determined in this study are comparable with those presented in the literature [38].…”

Section: Pb Of Methods Us-tsd)supporting

confidence: 91%

“…The recovery rates from 91% to 107% have been observed for Cu, Ni, V and Zn using the microwave digestion method for SRM 1633b [38]. According to this, the element concentrations determined in this study are comparable with those presented in the literature [38].…”

Section: Pb Of Methods Us-tsd)supporting

confidence: 86%

“…The determination Cr was performed with the recovery rate of 85% by using the MW and US-TSD methods. It is well known that some of the chromium compounds are difficult to digest even with the use of HF under high temperatures and pressures [20] although recovery of about 91% has been reached by using the microwave digestion followed with ICP-OES [38].…”

Section: Pb Of Methods Us-tsd)mentioning

confidence: 99%

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The determination of trace element concentrations in fly ash samples using ultrasound-assisted digestion followed with inductively coupled plasma optical emission spectrometry

Ilander

Väisänen

2009

Ultrasonics Sonochemistry

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A method of ultrasound-assisted digestion followed by inductively coupled plasma optical emission spectrometry (ICP-OES) used for the determination of trace element (chromium, copper, lead, nickel, vanadium and zinc) concentrations in fly ash samples was developed.All the measurements were performed in robust plasma conditions. Ultrasound-assisted digestion procedures using digestion solutions of aqua regia and hydrofluoric acid (HF) resulted in recovery rates of over 80 % for all the analyte elements. Ultrasound-assisted twostep digestion with digestion solutions of 6 mL of HNO 3 (Step 1) and 3 mL of HNO 3 + 3 mL of HF (Step 2) resulted in recovery rates of over 92 % for all the analyte elements with one exception, chromium, which had a recovery of about 85 %. The analysis of SRM 1633bshowed that the two-step ultrasound-assisted digestion method developed resulted in chromium, copper, nickel and zinc concentrations higher than the microwave digestion method standardized by the United States Environmental Protection Agency (USEPA method 3052). This is the very first time when a digestion method using ultrasound resulted in higher efficiency than microwave (USEPA method 3052) for chromium and nickel in very hard to dissolve samples. The major advantages of the ultrasound-assisted digestion over microwave digestion is the high treatment rate (about 30 samples simultaneously with a sonication time of 18 min) and the possibility to use new sample vessels without a significant increase in costs.

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“…According to this, the element concentrations determined in this study are comparable with those presented in the literature [38].…”

Section: Pb Of Methods Us-tsd)supporting

confidence: 91%

Section: Pb Of Methods Us-tsd)supporting

confidence: 86%

Section: Pb Of Methods Us-tsd)mentioning

confidence: 99%

See 1 more Smart Citation

The determination of trace element concentrations in fly ash samples using ultrasound-assisted digestion followed with inductively coupled plasma optical emission spectrometry

Ilander

Väisänen

2009

Ultrasonics Sonochemistry

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“…These conditions simulate cloud processing of tropospheric aerosol particles. [29] Note, Fe 3þ shows low solubility above pH 3.6. [30] The solubility product of concentrations above 60 ppm, a concentration relevant for our iron leach experiments, Fe 3þ begins to precipitate as Fe(OH) 3 above pH 2.4.…”

Section: Iron Leach Experimentsmentioning

confidence: 99%

Comparative evaluation of iron leach from different sources of fly ash under atmospherically relevant conditions

et al. 2016

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Environmental context. Iron, a limiting nutrient of plankton in the ocean, is deposited to the sea from atmospheric aerosols. In particular, atmospheric acidic conditions promote dissolution of iron from fly ash, a byproduct of coal-fired power plants. Here, we report that the iron leached from fly ash depends on its source region, and that the type of combustion process may influence the iron species mobilized.Abstract. Fly ash, an iron-containing by-product of coal-fired power plants, has been observed in atmospheric aerosol plumes. Under the acidic atmospheric conditions resulting from the uptake of atmospheric gases, iron leached from fly ash can impact global biogeochemical cycles. However, the fly ash source region, as well as its generating power plant, plays an important role in the amount, speciation and lability of iron. Yet no comparative studies have been made on iron leached from fly ash from different sources. This study reports the iron mobilisation by proton-promoted dissolution from wellcharacterised fly ash samples from three distinctive locations: the USA Midwest, north-east India and Europe. In addition, pH dependency was also investigated. Proton-promoted dissolution showed a variability between source regions with a relative iron leach in the order USA Midwestern . north-east Indian . European ash. In addition, the initial rate of iron leach suggests that source region is indeed a determining factor in the iron leaching capacity of fly ash, because dissolution from Midwestern fly ash is also faster than both European and Indian ash. Finally, the combustion process of fly ash proved to be significant for the iron speciation, given that well-combusted fly ash samples leached mostly Fe 3þ rather than bioavailable Fe 2þ . The role of fly ash should therefore be taken into account in order to better understand the effects of combustion particles in atmospheric iron deposition.

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“…For the microwave-assisted aciddigestion of coal samples, the combination of HNO 3 and HF is usually adopted because coal contains considerable amount of inorganic matters (1-30 %), which mainly consists of aluminosilicate matrix (Hatanpaa et al, 1997;Laban and Atkin, 1999;Rodushkin et al, 2002;Xu et al, 2005). A variety of atomic spectrometric techniques have been used for the determination of metals, among which are atomic absorption spectrometry (AAS) with flame or graphite tube atomizers, inductively coupled plasma optical emission spectrometry (ICP-OES) and XRF (Gumgum and Hamamci, 1991;Erdogan et al, 2004;Akba et al, 2005;Sneddon et al, 2006;Iwashita et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Microwave Acid Digestion for the Determination of Metals in Subbitumnious Coal Bottom Ash by ICP-OES

Saydut

2010

Energy Exploration & Exploitation

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The development of precise and easy determination method for the metals in fossil fuel is the essential factor for the study of problems which are caused by the existence of metals in fuel. Coal contains many kinds of mineral matter elements including metals derived from its generation. The sample preparation method developed for metal determination in coal by spectroanalytical technique is dry ashing, and wet acid microwave digestion. Microwave-acid digestion (MW-AD) followed by inductively coupled plasma-optical emission spectrometry (ICP-OES) was examined for the determination of metals (Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Zn) in coal bottom ash (CBA). Subbitumnious coal from Hazro deposits in SE Anatolia of Turkey has been used in this study. Metals in coal gave good recoveries for their certified or reference values.

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Determination of trace elements in coal and coal fly ash by joint-use of ICP-AES and atomic absorption spectrometry

Cited by 48 publications

References 18 publications

The determination of trace element concentrations in fly ash samples using ultrasound-assisted digestion followed with inductively coupled plasma optical emission spectrometry

The determination of trace element concentrations in fly ash samples using ultrasound-assisted digestion followed with inductively coupled plasma optical emission spectrometry

Comparative evaluation of iron leach from different sources of fly ash under atmospherically relevant conditions

Microwave Acid Digestion for the Determination of Metals in Subbitumnious Coal Bottom Ash by ICP-OES

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