The Contamination of Essential and Non-Essential Heavy Metals In Edible Vegetables In The South of Ethiopia, Gamo Gofa Province

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2019 by IJETT Journal
Volume-67 Issue-12
Year of Publication : 2019
Authors : Birhane Hidug Desta, Fisseha Guesh Gebremeskel
  10.14445/22315381/IJETT-V67I12P204

MLA 

MLA Style: Birhane Hidug Desta, Fisseha Guesh Gebremeskel  "The Contamination of Essential and Non-Essential Heavy Metals In Edible Vegetables In The South of Ethiopia, Gamo Gofa Province" International Journal of Engineering Trends and Technology 67.12 (2019):22-32.

APA Style: Birhane Hidug Desta, Fisseha Guesh Gebremeskel. The Contamination of Essential and Non-Essential Heavy Metals In Edible Vegetables In The South of Ethiopia, Gamo Gofa Province  International Journal of Engineering Trends and Technology, 67(12),22-32.

Abstract
In this study, heavy metals pollution in edible vegetables was investigated from farms near Arba Minch south of Ethiopia. The most important heavy metals in vegetables are Cadmium (Cd), Copper (Cu), Lead (Pb) and Zinc (Zn). In this region, the concentrations of heavy metals in edible vegetables were evaluated. After sample preparation, concentrations of heavy metals in vegetables were determined by atomic absorption spectrometry (AAS). Four different edible vegetables from Arba Minch town i.e., Cabbage, Carrot, Potato, Tomato were sampled. The experimental results in the vegetables particularly the concentrations of Cd, Pb were above the permissible limit of heavy metals as compared to WHO guidelines.The highest and lowest values were as follows: Cd (0.032± 0.0005-0.088± 0.0008) ppm, Cu(1.240± 0.0122–2.480± 0.0959) ppm, Pb (0.235± 0.0025– 0.927± 0.0042) ppm, and Zn (1.541± 0.0029–4.430± 0.0031)ppm.In consequence, the results of this study indicate that could attribute to metals contamination to take place during pre-harvest and postharvest process. Possible sources during pre-harvest include from soil type, fertilizers, pesticides, municipal wastewater and water used for irrigation, while postharvest sources may include contamination through air pollution and during transport to the market or at the point of sale industrial waste water can cause pollution in well waters and edible vegetables. So, this region is not suitable for cultivation and growing vegetables.

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Keywords
Heavy metals, environmental pollution, vegetables, dry ashing process, wet digestion process, Atomic Absorption Spectrometry.