Tin Ore Tailing Reservoir Dominant Plants Heavy Metal Accumulation Characteristics of Yunnan

2013 ◽  
Vol 663 ◽  
pp. 813-816 ◽  
Author(s):  
De Gang Zhang ◽  
Ruo Peng Yang ◽  
Han Yuan ◽  
Dong Wang
Keyword(s):  
Heavy Metal ◽  
Absorption Spectrometry ◽  
Field Investigation ◽  
Heavy Metal Accumulation ◽  
Cyperus Rotundus ◽  
Accumulation Coefficient ◽  
Flame Atomic Absorption ◽  
Metal Contents ◽  
Plant Transfer

According to the field investigation, collecting five kinds of dominant plant from tin ore tailing reservoir of Gejiu and tailing reservoir soil samples by flame atomic absorption spectrometry for the determination of five kinds of dominant plant roots, stems, leaves and its growth soil’s Pb, Zn, Cu and Cd contents, and analyzes five kinds of plant transfer and accumulation coefficient. The results showed that: soil heavy metal pollution is serious, especially Cd pollution; Lactuca indic L、Cattail、Alopecurus aequalis and Cyperus rotundus L. plants of heavy metal contents are the same, all is Zn﹥Cu﹥Pb﹥Cd, but four kinds of heavy metal contents are Pb﹥Zn﹥Cu﹥ Cd in Neyruadia plants; Lactuca indic L、Cyperus rotundus L、Alopecurus aequalis and Cattail to Pb, Zn, Cu and Cd four kinds of heavy metals accumulation ability is weaker. But from the root to the ground part organ transfer ability aspects: four kinds of heavy metal in Lactuca indic L is strong, Pb and Cd two elements in the Cyperus rotundus L is more stronger, Cd in Alopecurus aequalis is more stronger, Zn, Cu and Cd in Cattail is more stronger; the accumulation and transfer coefficient are larger than one, it was a better plant which removes Pb.

Column Preconcentration and FAAS Determination of Heavy Metal Ions using Artemisia Siberi as an Adsorbent

2014 ◽  
Vol 97 (6) ◽  
pp. 1707-1712 ◽  
Author(s):  
Hassan Zavvar Mousavi ◽  
Jalal Derakhshankhah
Keyword(s):  
Heavy Metal ◽  
Flame Atomic Absorption Spectrometry ◽  
Present Method ◽  
Heavy Metal Ions ◽  
Absorption Spectrometry ◽  
Sample Volume ◽  
Flame Atomic Absorption ◽  
Column Procedure ◽  
Column Preconcentration

Abstract A new column procedure for the determination of trace amounts of cadmium (II), lead (II), nickel (II), zinc (II), and copper (II), which combines flame atomic absorption spectrometry is described. These metals were sorbed on Artemisia siberi herb as an adsorbent at pH 4.0 and eluted with 3 mL of 1.5 M HNO3. The influences of analytical parameters including pH, flow rate, sample volume, type of eluent, and effect of diverse salts and cations on the recoveries of analyte ions were studied. The developed procedure provides preconcentration factors of about 117. LODs were 0.2 (Cd), 0.4 (Cu), 0.2 (Ni), 0.6 (Zn), and 1.4 (Pb) μg/L. The present method was successfully applied to the determination of the above-mentioned ions in water samples from Semnan, Iran. Recoveries greater than 95% and RSDs below 10% were obtained.

Determination of Trace Heavy Metal Ions in Water by FAAS after Preconcentration with ASTO

2013 ◽  
Vol 826 ◽  
pp. 267-270
Author(s):  
En Jun Song
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Absorption Spectrometry ◽  
Environmental Water ◽  
Flame Atomic Absorption ◽  
Experimental Parameters ◽  
Ph Range ◽  
Coexisting Ions

A new method of preconcentration with nanometer-strontium titanate immobilized on aluminum oxide (ASTO) combined with flame atomic absorption spectrometry (FAAS) was proposed for the determination of trace heavy metal ions, included Cu2+, Ni2+ and Ag+, in environmental water. The optimum experimental parameters for preconcentration of the heavy metals studied, such as pH, shaking time, eluent and coexisting ions, have been investigated. The results showed that Cu2+, Ni2+ and Ag+, could be quantitatively retained by the ASTO in the pH range of 5-8, and then eluted completely with 2 mol·L-1 HNO3. The detection limits of this method for Cu2+, Ni2+ and Ag+ were 0.031μg·L-1, 0.15μg·L-1and0.041μg·L-1 with an enrichment factor of 50, respectively. The method has been applied to the simultaneous determination of trace amounts of Cu2+, Ni2+ and Ag+ in environmental water, the recoveries were all in 95%-105%.

scholarly journals Determination of the heavy metal contents of frequently used herbal products in Pakistan

2022 ◽  
Vol 20 (2) ◽  
pp. 377-382
Author(s):  
Tehseen Quds ◽  
Maryam Ahmed ◽  
Sadia Shakeel ◽  
Nusrat Jalbani ◽  
Farah Mazhar ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Herbal Medicines ◽  
Absorption Spectrometry ◽  
World Health ◽  
Human Consumption ◽  
Arsenic Level ◽  
Herbal Products ◽  
Flame Atomic Absorption ◽  
Metal Contents ◽  
Health Organization

Purpose: To determine the heavy metal content of selected local and international herbal medicines sold for the treatment of various diseases in Pakistan. Methods: The different dosage forms of herbal medicines assessed were crude forms of syrups, gel, capsule, powder and tonic. Wet digestion method was used to prepare the herbal samples using nitric acid, and then analyzed for arsenic (As), cadmium (Cd), lead (Pb) and mercury (Hg), using MHS-15 mercury/hydride system and flame atomic absorption spectrometry (FAAS). Results: The investigated results displayed the Arsenic level (0.00 ppm to 0.580 ppm); Cadmium (0.001 ppm to 0.006 ppm); Lead (0.00 ppm to 1.078 ppm) and Mercury (0.001 ppm to 0.012 ppm). All results were found below the permissible limit of acceptability intake of the World Health Organization (WHO) and American Herbal Products Association (AHPA). The pH of the samples were in the range of 1.52 to 6.99. Conclusion: The findings reveal that the investigated herbal products available in Pakistan are safe with reference to heavy metals, and considered non-toxic for human consumption.

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