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Heavy Metals and Phytoremediation

Aggarwal, Honey [1], Jaj, Navneet [2], Goyal, Dinesh [3].

Heavy metal and coliforms contamination in green leafy vegetables.

Enumeration of bacteria and coliforms in randomly collected samples of palak (Beta vulgaris L.), fenugreek (Trigonella foenum-graecum) and coriander (Coriandrum sativum) was conducted to assess post harvest contamination, heavy metal analyses was also conducted in all the collected samples by wet digestion method, after oven drying. The mean values of total bacterial count and coliforms ranged between 109-250 cfu X 104 g-1 and 29-87 cfu X 104 g-1, respectively. All the vegetables had metal content in the order Fe> Zn> Pb> Cr> Ni> Cd. Among all green leafy vegetables, nearly 67-76% of samples were high in Pb, which was beyond the permissible limit of 2.5 mg Kg-1, as per Indian Standards of Food Adulteration Act (PFA), 1954, 18-39% samples were high in Zn, crossing 50 mg Kg-1 permissible limit (PFA, 1954), and 6-9% were high in Cd, which were crossing the permissible limit of 1.5 mg Kg-1 as per European Standards. The results of this study suggest that vegetables grown in the vicinity of industrial sites have high bacterial and coliform infestation and are subject to atmospheric deposition and uptake of heavy metals and pose a risk to humans if consumed.


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1 - Thapar University;, Department of Biotechnology & Environmental Sciences;, Science & Technology Entrepreneur\'s Park;, Thapar University;, Patiala;, Punjab;, 147004, INDIA
2 - Thapar Instt. of Engg. & Technology, Department of Biotechnology & Environmental Sciences
3 - Thapar Institute of Engineering & Technology, Department of Biotechnology & Environmental Sciences

Keywords:
heavy metal
green leafy vegetables.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P05015
Abstract ID:570


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