Determination of potentially toxic heavy metals in traditionally used medicinal plants for HIV/AIDS opportunistic infections in Ngamiland District in Northern Botswana

2012 ◽  
Vol 730 ◽  
pp. 42-48 ◽  
Author(s):  
Harriet Okatch ◽  
Barbara Ngwenya ◽  
Keleabetswe M. Raletamo ◽  
Kerstin Andrae-Marobela
Keyword(s):  
Heavy Metals ◽  
Medicinal Plants ◽  
Opportunistic Infections ◽  
Toxic Heavy Metals ◽  
Hiv Aids

Determination of Traces Heavy Metals from Solid Residues Formed by Combustion of Lignite in Relation to Degree of Accessibility in Soil and Plants

2017 ◽  
Vol 68 (10) ◽  
pp. 2363-2366
Author(s):  
Delia Nica Badea
Keyword(s):  
Heavy Metals ◽  
Power Plant ◽  
Thermal Power ◽  
Reference Value ◽  
Combustion Products ◽  
Toxic Heavy Metals ◽  
Area Of Influence ◽  
Risk Potential

The paper evaluates the presence and content of traces of heavy metals Hg, Pb, Ni, Cd (total forms) from coal and solid combustion products, the degree of transfer and accessibility in the area of influence of a lignite power plant. The content of toxic heavy metals in residues are characterized by RE Meiji [ 1 (Pb and Hg) and REMeij �1 (Ni and Cd) for the filter ash. Pb and Ni content in the soil exceeds normal values, and Pb exceeds and alert value for sensitive soils around the residue deposit (70.20 mg.Kg-1). The degree of accessibility of the metals in plants (TF), reported at the Khan reference value (0.5), indicates a significant bioaccumulation level for the metals: Cd (1.9) and Hg (0.6) inside the deposit; Cd (0.39) at the base of the deposit, Hg (0.8) in the area of the thermal power plant. The trace levels of heavy metals analyzed by GFAAS and CVAAS (Hg), indicates a moderate risk potential for food safety and quality of life in the studied area.

Determination of toxic heavy metals in Echinodermata and Chordata species from South Korea

2014 ◽  
Vol 7 (4) ◽  
pp. 295-301 ◽  
Author(s):  
Ji Yeon Choi ◽  
Girum Habte ◽  
Naeem Khan ◽  
Eun Yeong Nho ◽  
Joon Ho Hong ◽  
...  
Keyword(s):  
Heavy Metals ◽  
South Korea ◽  
Toxic Heavy Metals

scholarly journals Use of Multiwalled Carbon Nanotube Disks for the SPE of Some Heavy Metals as 8-Hydroxquinoline Complexes

2011 ◽  
Vol 94 (4) ◽  
pp. 1297-1303 ◽  
Author(s):  
Mustafa Soylak ◽  
Yunus Emre Unsal
Keyword(s):  
Heavy Metals ◽  
Carbon Nanotube ◽  
Bovine Liver ◽  
Sample Volume ◽  
Multiwalled Carbon Nanotube ◽  
Separation System ◽  
Toxic Heavy Metals ◽  
Multiwalled Carbon ◽  
Humber River

Abstract A multiwalled carbon nanotube disk was used for the SPE of some toxic heavy metals from environmental samples. Metal ions were adsorbed on the disk as 8-hydroxquinoline complexes, then quantitatively desorbed from the disk by using 10 mL 2 M HNO3. The effects of analytical parameters, including pH, sample volume, and flow rates, on the recoveries of Cd(II), Co(II), Ni(II), Pb(II), Fe(III), Cu(II), and Zn(II) were investigated. The influences of some 1A and 2A group elements and some other ions as concomitant ions on the recoveries of analyte ions were also examined. The LODs of the presented preconcentration-separation system for the analyte ions were found to be in the range of 1.0–5.2 µg/L. In order to validate the procedure, SRM 1577B Bovine Liver, IAEA 336 Lichen, and HR-1 Humber river sediment certifed reference materials were analyzed. The proposed method has been applied to the determination of understudy elements in some pharmaceutical samples and natural water samples from different sites in Turkey.

scholarly journals Estimation of heavy metals in medicinal plants and their infusions

2012 ◽  
Vol 23 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Diana Diaconu ◽  
Rodica Diaconu ◽  
Tinca Navrotescu
Keyword(s):  
Heavy Metals ◽  
Medicinal Plants ◽  
Extraction Procedure ◽  
Absorption Spectrometry ◽  
Mineral Elements ◽  
The Body ◽  
Mentha Piperita ◽  
Metallic Elements ◽  
Primula Veris

AbstractMedicinal plants and their extracts deserve special attention because of the important influence they have to human health. There are easily contaminated with metals during growth, development and processing. The aim of this study was to achieve the quantitative determination of metallic elements (Cu, Cr, Cd, Fe, Mn, Zn, Pb) in some medicinal plants including Mentha piperita L., Matricaria camomilla L., Hypericum perforatum L., Achillea millefolium L., Thymusserpillum, Capsella-bursa-pastoris L., Urtica dioica L., Primula veris L., Plantago major L., Taraxacum officinalis L., and their infusions, using flame absorption spectrometry. The highest concentration of metal in medicinal plants was that of iron 333.22 ± 35.18 mg Kg-1 and zinc 244.90 ± 32.13 mg Kg-1. Metal content in the powdered medicinal plants was in descending order: Fe > Zn > Mn > Cu > Cr; Pb and Cd were present in minor amounts. Analysis of plant infusions showed transfer of heavy metals during extraction procedure. Monitoring the content of mineral elements in medicinal plants and their boiling water extracts is of high importance because some heavy metals in large quantities in the body may have a toxic effect.

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