Sequential Extraction of Vanadium in Different Soil Samples Using Conventional and Ultrasonic Devices

2013 ◽  
Vol 96 (3) ◽  
pp. 650-656 ◽  
Author(s):  
Sumaira Khan ◽  
Tasneem Gul Kazi ◽  
Nida Fatima Kolachi ◽  
Imran Afridi ◽  
Naeem Ullah
Keyword(s):  
Sequential Extraction ◽  
Thermal Power ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Total Content ◽  
Standard Addition ◽  
Absorption Spectrometry ◽  
Soil Samples ◽  
Bcr Sequential Extraction ◽  
Sequential Extraction Method ◽  
Agricultural Areas

Abstract A rapid ultrasound accelerated sequential extraction (USE) procedure was used to develop chemical partitioning of vanadium (V), proposed by the Community Bureau of Reference/European Union Measurement and Testing Programme (BCR). The effects of ultrasonic treatment on the extraction of V in different soil samples collected from the vicinity of a thermal power plant and agricultural areas of Sindh, Pakistan, were evaluated. In the conventional BCR-sequential extraction method, each extraction step takes 16 h. With the use of ultrasound energy, Steps 1–3 of the USE procedure (excluding the hydrogen peroxide digestion in Step 3, which was performed conventionally) could be completed in 45, 40, and 45 min, respectively. Analysis of the extracts was performed by electrothermal atomic absorption spectrometry. The total contents of V were obtained by digestion with two acid mixtures: H2O2–HF–HNO3–H2SO4 and HClO4–HF–HNO3–H2SO4. Validation was performed by the standard addition technique. Results obtained for each fraction by both methods were statistically compared; no significant differences were found (P < 0.05). The accuracy of the USE procedure was checked by comparing the sum of the V contents in the three fractions and residue with the total content of V. The results of this work provide information on the chemical composition, distribution, and potential mobility of the V in different soils.

Research on the Morphological of Lead and Zinc in the Smelting Slag

2015 ◽  
Vol 1088 ◽  
pp. 200-205
Author(s):  
Lin Yu ◽  
Dong Wei Li
Keyword(s):  
Heavy Metals ◽  
Sequential Extraction ◽  
Ecological Risk ◽  
Total Content ◽  
Residual Fraction ◽  
Bcr Sequential Extraction ◽  
Lead And Zinc ◽  
Smelting Slag ◽  
Reducible Fraction

In this paper analysed the forms of heavy metals (Zn Pb Cd and As) of the Smelting Slag for Lead and Zinc,using BCR sequential extraction. Different chemical morphological of heavy metals have different activity and harmfulness. Migration and Utilization of heavy metals were decided by the existent form of heavy metals in the soil,which influenced Bioactivity and Toxicity. The results show that the main forms of Zn and Cd are Oxidizable and Residual fraction, and Pb mainly occurred in Oxidizable and Reducible fraction. however, As mainly occurred in Residual fraction, which the percentage of reachs 99.56%. According to the percentage of fractions extracted in total content (As is 0.44%, Zn is 14.7%, Pb is 85.98%, Cd is 48.86%),the latent ecological risk of heavy metals varied in the descending order of,Pb Cd Zn and As.

scholarly journals Measurement of Soluble Arsenic in Soil of Bangladesh by Acid-alkali Sequential Extraction

2008 ◽  
Vol 1 (1) ◽  
pp. 92-107 ◽  
Author(s):  
Mohammad Shafiul Azam ◽  
Md. Shafiquzzaman ◽  
Iori Mishima ◽  
Jun Nakajima
Keyword(s):  
Sequential Extraction ◽  
Soil Phosphorus ◽  
Extraction Procedure ◽  
Soil Surface ◽  
Soil Samples ◽  
Wet Season ◽  
Arsenic Mobility ◽  
Reducing Conditions ◽  
Sequential Extraction Method ◽  
Core Soil

To measure easily soluble fraction of arsenic, a sequential extraction method by 0.1N HCl and 0.1N NaOH was used according to the soil phosphorus extraction procedure. The effects of reducing conditions on arsenic extraction were examined in incubation test. In high reducing conditions arsenic solubility was shown to be high and seemed to be controlled by dissolution of iron oxy-hydroxides. pH played a predominant role in determining the concentrations of soluble arsenic. Arsenic solubility could be possible at low or high pH conditions. Released arsenic in different pH and redox conditions showed that it is a part of acid extractable arsenic which is sorbed weakly on the soil surface and can be extracted during acid-alkali sequential extraction. Therefore, the method could be applicable to measure potential solubility of arsenic as a result of alteration in soil (e.g. redox, pH) and environmental factors. Sequential extraction results of the soil samples collected in dry and wet season suggested that acid-alkali extracted arsenic fractions of surface and core soil samples of paddy field were increased in wet season. They seemed to be moved with irrigation groundwater. Keywords: Acid-alkali extraction; Arsenic contamination; Soil arsenic mobility; Groundwater contamination; Paddy soil.  © 2009 JSR Publications. ISSN: 2070-0237(Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v1i1.1058  

scholarly journals Spectrochemical determination of lead in wines

2000 ◽  
Vol 65 (5-6) ◽  
pp. 323-329 ◽  
Author(s):  
Mirjana Tripkovic ◽  
Marija Todorovic ◽  
Ivanka Holclajtner-Antunovic ◽  
Slavica Razic ◽  
Aleksandra Kandic ◽  
...  
Keyword(s):  
Electrothermal Atomic Absorption Spectrometry ◽  
Time Integration ◽  
Standard Addition ◽  
Organic Matrix ◽  
Absorption Spectrometry ◽  
Atomic Emission ◽  
Low Concentrations ◽  
Comparison Of The Results ◽  
Complex Organic

The determination of lead in wines of different origin was performed by means of atomic emission spectroscopy with argon stabilized DC. U-shaped arc and electrothermal atomic absorption spectrometry. The comparison of the results obtained by the direct and standard addition method has indicated the presence of a depressive effect of the complex organic matrix. The effect is avoided successfully by mineralization, as well as by dissolution of the samples. Thus, a relative simple but precise and sensitive method involving the application of a stabilized arc and photoelectric detection with time integration of the emission signals is recommended for the determination of low concentrations of lead in wines. The complex organic matrix was investigated by recording the IR spectra of different wine fractions.

Heavy Metals Speciation of Size-fractionated Sediments Collected from Combined Sewer System Using Sequential Extraction Method

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
K. Kojima ◽  
I. Kasuga ◽  
F. Kurisu ◽  
H. Furumai
Keyword(s):  
Heavy Metals ◽  
Sequential Extraction ◽  
Extraction Method ◽  
Metal Speciation ◽  
High Mobility ◽  
Aquatic Organisms ◽  
Total Content ◽  
Combined Sewer ◽  
Sequential Extraction Method ◽  
The Impact

Sediments deposited in sewer pipes have been concerned as one of the main pollution loads from combined sewer overflow (CSO). Since the toxicity, mobility and bioavailability of heavy metals depend on their speciation, it is necessary to consider not only their amounts but also their speciation to evaluate the adverse effects on aquatic organisms in receiving waters. Sequential extraction method was applied to the size-fractionated sediments to evaluate heavy metal speciation. Although the speciation of Cr, Ni, Cu, Zn and Pb differed among sampling points as well as their contents, the content of easily exchangeable fraction was strongly correlated with total content for all the metals except for Cu. The result of heavy metals speciation revealed that Ni, Zn and Pb in combined sewer sediments could have high mobility potential. The result of size-fractionated sediments indicated that the contents and mobility potential of the heavy metals were larger as particle size was finer. Thus, it is important to control fine sediments in combined sewer to reduce the impact of CSO pollution.

Sign in / Sign up

Export Citation Format

Share Document