Article Number: DRJBB11695895


ISSN: 2734-2158

Vol.6 (5), pp. 75-82, August 2020

Copyright © 2020

Author(s) retain the copyright of this article

Original Research Article

Effect of Archachatina marginata feces and synthesize fertilizer on bioaccumulation and translocation of trace metals in some edible vegetables; a major threat to food safety

Oguh, C. E.*

Oniwon, W. O.

Obiwulu, E. N. O.

Mohammed, Y. M.

Bakare, V. O.

Farouk, J. M.


The study investigated the uptake and translocation pattern of trace metals from different vegetables amended with Achachatina marginata feces and synthesize fertilizer. A total of 24 pots were used for the planting and were all filled with the same soil. The pots were divided into two groups, each group contains 12 pots. In the experimental pots, NPK fertilizer and snail faces were applied to group 1 and group 2 respectively. Before the fertilizer application and seeding, the initial soil sample and fertilizer sample (topsoils, 0-15 cm) were collected.  Plant and soil samples were collected at week 7 after sowing. The plants were pulled out carefully, and soil samples were collected using a hand trowels to dig the soil around the plant position. Plant samples (leaves) were kept in separate polythene bags and properly labeled. The metal (Pb, Cd, As, and Hg) concentrations were determined by atomic absorption spectrophotometer (AAS). Results show that the concentration of metals in soil with NPK fertilizer was greater than the soil amended with snail faces which shows a significant (P<0.05) variation in the concentrations of metals. Vegetables amended with NPK fertilizer had higher heavy metals concentrations (As, Cd, Hg, and Pb) than vegetables amended with snail faces, which were all above the FAO/WHO permissible limit. The transfer factor indicates that the high presence of metals in the soil amended with NPK was also transferred to the vegetables. The more the presence of metals in the soil the more the bioaccumulation on the vegetables. The soil to plant TF in vegetables amended with NPK for As, Cd, Hg, and Pb were all greater than one (>1), while snail faces were below one (<1). The present study revealed that vegetables grown in NPK amended soil bioaccumulate significantly high levels of trace metals that exceed the maximum prescribed limits for elements in vegetable, which toxicity disrupts natural ecosystems and affects the food chain, leading to deleterious health problems in humans and animals.

Keywords: Archachatina margenata, fertilizer, trace metals, translocation, vegetables

 Received: July 16, 2020  Accepted: August 25, 2020  Published: August 31, 2020

Oguh Et Al1

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