Comparative Assessment of the Levels of Some Metal Ions in Soil Rhizosphere of Onion and Onion Bulb (Allium cepa l) Cultivated in Danbam Local Government Area: North East Nigeria
Keywords:
Allium cepa L. Determination, metal ions, soil rhizosphere, onion bulb, spectroscopic techniquesAbstract
Authors: Elisha Karu*, Buhari Magaji, Aishatu Umar Maigari and Fauziyya Aliyu Jibo
Received 11 February 2021/Accepted 22 March 2021
Levels of some metal ions (Cd2+, Pb2+, Cr3+, Mn2+ and Mg2+) in the soil rhizosphere and onion bulb were determined by spectroscopic techniques (Atomic Absorption Spectroscopy AAS, and UV-Visible Spectrophotometry). Comparative analysis of the results by the two techniques used shows that Cr, Cd, and Pb were not detected by atomic absorption spectrophotometer in both the soil rhizosphere and onion bulbs but Mn was detected at concentrations ranges of 9 – 12 ppm and 2 – 13 ppm in the soil and onion bulbs. Concentration of Mg2+ was observed to range 6 – 10 ppm and 7 -9 ppm in the soil and onion bulb respectively. Much lower concentrations were detected by the spectrophotometric determinations of Cd, Mn, and Pb in both the soil and onion bulb samples with Pb having the highest concentration (0.002 – 0.005 ppm) in the four study sites. Cr was not detected by any of the two techniques used.
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