A comparative study of acid-extractable and total digestion methods for the determination of inorganic elements in peat material by inductively coupled plasma-optical emission spectrometry

Yafa, Charun; Farmer, John G.

doi:10.1016/j.aca.2005.10.043

Cited by 89 publications

(49 citation statements)

References 26 publications

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“…On the other hand, the addition of conc. HF enhanced the disintegration of the silicate structure [40] and released the metals bound to the silicate fractions. However, both hydrogen peroxide and conc.…”

Section: Efficacy Of Different Acids For Metal Dissolution From Esmmentioning

confidence: 99%

Evaluation of Wet Digestion Methods for Quantification of Metal Content in Electronic Scrap Material

Das

Ting

2017

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Recent advances in the electronics sector and the short life-span of electronic products have triggered an exponential increase in the generation of electronic waste (E-waste). Effective recycling of E-waste has thus become a serious solid waste management challenge. E-waste management technologies include pyrometallurgy, hydrometallurgy, and bioleaching. Determining the metal content of an E-waste sample is critical in evaluating the efficiency of a metal recovery method in E-waste recycling. However, E-waste is complex and of diverse origins. The lack of a standard digestion method for E-waste has resulted in difficulty in comparing the efficiencies of different metal recovery processes. In this study, several solid digestion protocols including American Society for Testing and Materials (ASTM)-D6357-11, United States Environment Protection Agency Solid Waste (US EPA SW) 846 Method 3050b, ultrasound-assisted, and microwave digestion methods were compared to determine the metal content (Ag, Al, Au, Cu, Fe, Ni, Pb, Pd, Sn, and Zn) of electronic scrap materials (ESM) obtained from two different sources. The highest metal recovery (mg/g of ESM) was obtained using ASTM D6357-11 for most of the metals, which remained mainly bound to silicate fractions, while a microwave-assisted digestion protocol (MWD-2) was more effective in solubilizing Al, Pb, and Sn. The study highlights the need for a judicious selection of digestion protocol, and proposes steps for selecting an effective acid digestion method for ESM.

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Section: Efficacy Of Different Acids For Metal Dissolution From Esmmentioning

confidence: 99%

Evaluation of Wet Digestion Methods for Quantification of Metal Content in Electronic Scrap Material

Das

Ting

2017

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“…The organic matter (OM) content was determined relative to the oven-dried mass after ashing (450 °C; 4 h). The ash residue was digested using a MARS 6 microwave digestion system (CEM) and the modified US EPA Method 3052 (HF-HNO 3 Aristar, VWR International Ltd., Leics., UK) published by Yafa and Farmer (2006). With every batch of ten samples, duplicate reagent blanks and duplicate samples of a peat certified reference material (NIMT/UOE/FM001 (Yafa et al, 2004)) were taken through the same procedure (see SI file).…”

Section: Soil Samplesmentioning

confidence: 99%

Mobility of antimony, arsenic and lead at a former antimony mine, Glendinning, Scotland

Macgregor

MacKinnon

Farmer

et al. 2015

Science of The Total Environment

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HIGHLIGHTS• Solid phase speciation of antimony, arsenic, lead and iron differed between sites.• Elevated soil porewater antimony concentrations were linked to DOM and spoil leaching.• Leaching from spoil resulted in elevated antimony concentrations in stream water. AbstractElevated concentrations of antimony (Sb), arsenic (As) and lead (Pb) in upland organic-rich soils have resulted from past Sb mining activities at Glendinning, southern Scotland. Transfer of these elements into soil porewaters was linked to the production and leaching of dissolved organic matter and to leaching of spoil material. Sb was predominantly present in truly dissolved (<3 kDa) forms whilst As and Pb were more commonly associated with large Fe-rich/organic colloids. The distinctive porewater behaviour of Sb accounts for its loss from deeper sections of certain cores and its transport over greater distances down steeper sections of the catchment. Although Sb and As concentrations decreased with increasing distance down a steep gully from the main spoil heap, elevated concentrations (~6-8 and 13-20 μg L −1 , respectively) were detected in receiving stream waters. Thus, only partial attenuation occurs in steeply sloping sections of mining-impacted upland organic-rich soils and so spoil-derived contamination of surface waters may continue over time periods of decades to centuries.Capsule abstract: Production and leaching of dissolved organic matter led to the concomitant transfer of truly dissolved Sb to soil porewaters. Leaching of spoil-derived Sb impacted on the quality of receiving stream waters.

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“…The mixture was manually shaken, covered with a watch glass and kept at room temperature for 16 h (overnight). A Dimroth type reflux condenser was placed on top of the flask and gently heated to boiling for 2 h, as performed by Yafa and Farmer (2006). After cooling, the condenser was rinsed with 25 ml of water (milli-Q) and collected in the flask.…”

Section: 2 M a G N E T I C M E A S U R E M E N T Smentioning

confidence: 99%

Magnetic, chemical and radionuclide studies of river sediments and their variation with different physiographic regions of Bharathapuzha river, southwestern India

et al. 2015

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A comparative study of acid-extractable and total digestion methods for the determination of inorganic elements in peat material by inductively coupled plasma-optical emission spectrometry

Cited by 89 publications

References 26 publications

Evaluation of Wet Digestion Methods for Quantification of Metal Content in Electronic Scrap Material

Evaluation of Wet Digestion Methods for Quantification of Metal Content in Electronic Scrap Material

Mobility of antimony, arsenic and lead at a former antimony mine, Glendinning, Scotland

Magnetic, chemical and radionuclide studies of river sediments and their variation with different physiographic regions of Bharathapuzha river, southwestern India

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