Determination of very low levels of gold and palladium in wastewater and soil samples by atomic absorption after preconcentration on modified MCM-48 and MCM-41 silica

A simple and rapid method was applied for extraction, preconcentration and determination of trace amounts of gold and palladium in wastewater by using functionalized mesoporous silica. Extraction was investigated on adsorbents prepared by grafting aminopropyl on the surface of MCM-41 and MCM-48 meso...

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Bibliographic Details
Published in:Talanta (Oxford) 2010-06, Vol.81 (4), p.1183-1188
Main Authors: Ebrahimzadeh, H., Tavassoli, N., Amini, M.M., Fazaeli, Y., Abedi, H.
Format: Article
Language:English
Subjects:
Adsorption
Analysis methods
Analytical chemistry
Applied sciences
Cations
Chemistry
Chemistry Techniques, Analytical
Exact sciences and technology
Extraction
Flow rate
Global environmental pollution
Gold
Gold - analysis
Hydrogen-Ion Concentration
Ions
Mesoporous silica
Metals
Natural water pollution
Palladium
Palladium - analysis
Pollution
Real sample
Silicon dioxide
Silicon Dioxide - chemistry
Soil (material)
Solid phase extraction
Sorption
Spectrometric and optical methods
Spectrophotometry, Atomic - methods
Waste water
Water Pollutants, Chemical - analysis
Water Purification - methods
Water treatment and pollution
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Summary:A simple and rapid method was applied for extraction, preconcentration and determination of trace amounts of gold and palladium in wastewater by using functionalized mesoporous silica. Extraction was investigated on adsorbents prepared by grafting aminopropyl on the surface of MCM-41 and MCM-48 mesoporous silica. The optimum experimental conditions such as pH, flow rates, type and the smallest amount of eluent for elution of Au and Pd, break through volume and the influence of various cationic interferences on the sorption of gold(III) and palladium(II) were evaluated. The extraction efficiency for gold and palladium were greater than 98% and limit of detection (LOD) was lower than 0.06 ng mL −1 for gold and 0.1 ng mL −1 for palladium on both functionalized MCM-41 and MCM-48 silica. The preconcentration factor was greater than 800 for gold and 400 for palladium and the relative standard deviation (RSD) of the method was
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2010.02.007