Medicinal herbs and their mixtures, which are widely used for prevention and treatment of some disease, can also present health risks due to the presence of toxic metals such as Pb and Cd. The application of different agrotechnical practices during plant growing season, as well as the process of circulation of substances in nature, may be the cause of plant contamination.
The aim of this study was to determine the content of lead, cadmium and copper from soil which are bioavailable for absorption by plant, as well as the total content of these metals in some medicinal herbs that were cultivated in two different locations. The presence of these metals in the samples was detected using highly sensitive microanalytical technique potentiometric stripping analysis (PSA).
The mean value of lead total content in the analyzed samples of medicinal herbs Chamimillae flos, Urticae folium, Menthae folium, Altheae radix and Basilici herba, which were grown at the sites near the industrial zone, was about 1.55 μg/g, 1.82 μg/g, 1.90 μg/g, 1.99 μg/g and 2.74 μg/g, respectively. Contrary to this, the total content of this toxic metal in the analyzed plant samples grown on rural areas was detected only on some sites.
Based on the results of this study, it can be concluded that medicinal herbs contained a certain amount of lead and that its content varied depending on the location at which the plant species were grown as well as on plant affinity to certain metal. Cadmium and copper were not detected in the tested plant material.
If the inline PDF is not rendering correctly, you can download the PDF file here.
1. Kirmani MZ Mohiuddin S Naz F Naqvi I Zahir E. Determination of some toxic and essential trace metals in some medicinal and edible plants of Karachi city. J Basic Appl Sci 2011; 7(2): 89-95. http://dx.doi.org/10.6000/1927-5129.2011.07.02.03
2. Arpadjan S Celik G Taskesen S Gücer S. Arsenic cadmium and lead in medicinal herbs and their fractionation. Food Chem Toxicol 2008; 48:2871-5. http://dx.doi.org/10.1016/j.fct.2008.05.027
3. Gomez RM Cerutti S Sombra L Silva FM Martinez DL. Determination of heavy metals for the quality contril in argentinian herbal medicines by ETAAS and ICP-OES. Food Chem Toxicol 2007; 45:1060-4. http://dx.doi.org/10.1016/j.fct.2006.12.013
4. Caldas DE Machado LL. Cadmium mercury and lead in medicinal herbs in Brazil.Food Chem Toxicol 2004; 42:599-603. http://dx.doi.org/10.1016/j.fct.2003.11.004
5. Ghosh M Singh SP. A comparative study of cadmium phytoextraction by accumulator and weed species. Environ Pollut 2005; 133:365-71. http://dx.doi.org/10.1016/j.envpol.2004.05.015
6. Zayed A Gowthaman S Terry N. Phytoaccumulation of trace elements by wetland plants: I. Duckweed. J Environ Qual 1998; 27:715-21. http://dx.doi.org/10.2134/jeq1998.004724250027000 30032x
7. Kabata-Pendias A. Trace elements in soils and plants. 3rd edition. Chemical Rubber Company Ann Arbor Michigan USA 2001.
8. Mortada WI Sobh MA El-Defrawy MM Farahat SE. Reference intervals of cadmium lead and mercury in blood urine hair and nails among residents in Mansoura city Nile Delta Egypt. Environmental Research 2002;90(2):104-10. http://dx.doi.org/10.1006/enrs.2002.4396
9. Kaličanin BM. Determination of very toxic metal-Cadmium in natural water samples. Desalination 2009; 249(1):58-62. http://dx.doi.org/10.1016/j.desal.2009.03.006
10. Davis AC Wu P Zhang X Hou X Jones BT. Determination of cadmium in biological samples. Appl Spectrosc Rev 2006; 41:35-75. http://dx.doi.org/10.1080/05704920500385486
11. Nolan CV Shaikh ZA. Lead nephrotoxicity and associated disorders: biochemical mechanisms. Toxicology 1992; 73:127-46. http://dx.doi.org/10.1016/0300-483X(92)90097-X
12. Goyer RA. Results of lead research: prenatal exposure and neurological consequences.Environ Health Perspect 1996; 104:1050-4.
13. Klaassen DC Watkins BJ. Casarett & Doull's Essentials of Toxicology. 1st edition. McGraw-Hill Professional New York USA 2003.
14. Prasad AS. Clinical Biochemical and Nutritional Aspects of Trace Elements. Alan R. Liss New York 1982.
15. Somenath M. Sample Preparation Techniques in Analytical Chemistry. John Wiley & Sons Inc 2003.
16. Premović PI Ciesielczuk J Todorović BŽ Djorđević DM Krstić NS. Geochemistry of Fe3+ in the hydrothermal dickite from jedlina zdroj (Lower Silesia Poland). J Serb Chem Soc 2009; 74(12):1477-89. http://dx.doi.org/10.2298/JSC0912477P
17. Liang J Chen C Song X Han Y Liang Z. Assessment of Heavy Metal Pollution in Soil and Plants from Dunhua Sewage Irrigation Area. Int J Electrochem Sci 2011; 6:5314-24.
18. Black A McLarenRG Reichman SM Speir TW Condron LM. Evaluation of soil metal bioavailability estimates using two plant species (L. perenne and T. aestivum) grown in a range of agricultural soils treated with biosolids and metal salts. Environ Pollut 2011; 159(6): 1523-35. http://dx.doi.org/10.1016/j.envpol.2011.03.004
19. Ali Khan M Wajid A Noor S. Effect of soil contamination on some heavy metals content of Cannabis sativa. J Chem Sec Pak 2008; 30:805-9.
20. Regulation about the quantity of pesticides metals and mataloida and other toxic substances chemotherapy anabolic steroids and other substances that can be found in food. Službeni list SRJ 1992. br. 5. (in Serbian).
21. Tokalıoğlu S. Determination of trace elements in commonly consumed medicinal herbs by ICP-MS and multivariate analysis. Food Chem 2012; 134(4): 2504 -8. http://dx.doi.org/10.1016/j.foodchem.2012.04.093
22. Pytlakowska K Kita AJanoska PPołowniak M Kozik V. Multi-element analysis of mineral and trace elements in medicinal herbs and their infusions. Food Chem 2012; 135(2): 494-501. http://dx.doi.org/10.1016/j.foodchem.2012.05.002
23. Arpadjan S Çelik G Taşkesen S Güçer Ş. Arsenic cadmium and lead in medicinal herbs and their fractionation. Food and Chem Toxicol 2008; 46(8):2871-75. http://dx.doi.org/10.1016/j.fct.2008.05.027