Determination of Cyanide Content and Heavy Metals (Cu, Ni, Cd, & Pb) in Different Processed Cassava Meal in Abraka Metropolis, Delta State, Nigeria

Mercy Eloho Udezi(1*),

(1) Federal University Of Petroleum Resources, Effurun , Delta State. Nigeria
(*) Corresponding Author

Abstract


Cassava is a tuberous plant in Nigeria that can be processed into different meal but its various forms contains a trace concentrations of cyanide, cadmium, nickel, lead and copper that are not only essential for man but toxic if their concentration levels are high. This study determined the cyanide content and some heavy metals in different processed cassava meal sold in markets at Abraka and its environs. Samples of fufu, garri, starch, and fresh cassava were collected from five selected markets in Abraka. Cyanide concentration was determined using AOAC (1990) method of alkaline titration steam distillation of the sample using silver nitrate. While copper, cadmium, nickel and lead were determined using the Atomic absorption spectrophotometer. Results for the cyanide levels were 7.56 mg/kg for fresh cassava, 5.4 mg/kg for starch, 3.24 mg/kg for garri, 2.16 mg/kg for fufu. The levels were in the order, fresh casava > starch > garri > fufu. The heavy metals concentration of copper (Cu), were (mg/kg) 2.04 for fresh cassava, 1.62 for garri, 1.44 for fufu, and 1.02 for starch. The levels were in the order, fresh cassava > garri > fufu > starch. The concentration of cadmium (Cd) were (mg/kg) 3.14 for fresh cassava, 1.03 for garri, 1.47 for fufu, 2.84 for starch. The levels were in the order, fresh cassava > starch > fufu > garri. The concentrations of nickel (Ni) were (mg/kg) 2.46 for fresh cassava, 1.89 for garri. 1.94 for fufu and 1.73 for starch. The levels were in the order, fresh cassava > fufu >garri > starch. Lead (Pb) was not detected in all the samples. From the results obtained in this study, fufu is the safest for consumption due to the low contents of cyanide and heavy metals. Garri is also considered to be safe as they fall within the WHO permissible limit for those metals. Hence, proper processing of cassava products should be encouraged to reduce bioaccumulation of cyanides levels in them.


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References


J.D Lee. “Concise inorganic Chemistry” (5th edition). 4443-54. (2009)

Claude Fauguent and Deienis Fargette. “African cassava Mosaic virus: Etiology, epidermiology and control plant diseases” vol. 74(0): 404-11 (1990).

N.N Greenwood, and, AA. Earnshaw. “Chemistry of element” (3rd edition) oxford: Butterworth Heinemann. ISBN 0.7506-3365. Quality criteria New York pp. 113. (2001).

I. Hughes, F. Carvello, and M. Hughes, “Purification characterization and clonning of Alpha hydroxynitrile Lyase from cassava (manihot esculenta crantz).” Arch Biochemistry. Biophys 311:496-502 (1994).

C.C Ndiokwere, and C. A Ezehe, “The occurrence of heavy metals in the vicinity of industrial complexes in Nigeria.” Environment International 16:291-295. (2000)

Osakwe, S.A (2009). “Heavy metal distribution and bioavailability in soil and cassava (manihot esculenta) grantz along warri Abraka expressway, Delta State”, Nigeria, Journal of Chemical Society of Nigeria, 34:211, 235-245.

T.P. Philips., “An overview of cassava consumptions and production in cassava tooxicity and thyroid.” Pp 83-88. (2001).

L. Dul., M. Bokangs, B.L Moller, and B.A Halker, “The Biosynthesis of cyanogenic glycosides in roots of cassava” photochemistry. 39: 323-326. (1995).

AOAC (1990), Official method of analysis, association of official analytical chemist. Horwitz (Ed). Washinton DC.

R.O.A. Adelagun, F.E. Aihkoje, O.J. Igbaro, J.O. Fagbemi, E.P. Berezi, O.M. Ngana, M.S. Garba, and G. Osondu, “Comparative analysis of cyanide concentration in different proccessed cassava product.” FUW Trends in Sci & Tech.;8(1):210-213. E-ISSN: 24085162. 2023

L.O. Sanni, B. Maziya-Dixon, J.N. Akanya. “Standards for cassava products and guidelines for export.” IITA. 2005.

E. Ezeh, O. Okeke, C.M Aburu, O.U. Anya, “Comparative Evaluation of the Cyanide and Heavy Metal Levels in Traditionally Processed Cassava Meal Products Sold Within Enugu Metropolis”. Int J Environ Sci Nat Res. 2018; 12(2): 555834. DOI:10.19080/IJESNR.2018.12.555834

J.A.V. Famurewa, and P.O. Emuekele, “Cyanide reduction pattern of cassava (Manihot esculenta) as affected by variety and air velocity using fluidized bed dryer.” AJFST 5(1): 75 – 80.2014.

M.B. Etsuyankpa, C. E. Gimba, E.B. Agbaji and K.I. Omoniyi. “Determination of Cyanide and Saponins in the Products of Selected Cassava Varieties from Three Sampling Sites in Nigeria State.” CSN Book of Proceedings. 1(36): 247-250. 2013a

M.B. Etsuyankpa, C.E. Gimba, E.B. Agbaji & K.I. Omoniyi, “Evaluation of Proximate Composition of ‘Fufu’, ‘Lafun’ and ‘Gari’ Through Microbial Fermentation of Four Varieties of Cassava.” CSN Book of Proceedings. 1(36): 251-256. 2013b.

L,.T. Kigigha, P. Nyenke, S.C. Izah: “Health risk assessment of selected heavy metals in garri (cassava flakes) sold in major markets in Yenegoa metropolis, Nigeria.” Moi Toxicology 4(12); 47-52. 2018

A.A. Audu, M. Waziri, T.T. Olasinde. “Proximate analysis and levels of some heavy metals in cassava flour processed by roadside drying along Abuja-Lokoja Highway, Nigeria.” IJLS 2(3);55-58. 2012.

D.A. Cataldo, R.E. Wilding, “Soil and plant factors influencing the accumulation of heavy metals by plants.” EHP 27;149-159. 1978.

FAO/WHO: “Adverse health effects of heavy metals in Human. Human Health for health sector” Geneva 77p.

World Health Organisation: “Heavy Metals, Safety evaluation of certain food additives and contaminants. 55 meeting of the joint FAO/WHO. Expert committee in food additives, Geneva, WHO food additives series,” Geneva, 46p. 2014

G. Nordberg, “Excursions of intake above ADI: case study on cadmium.” Regul Toxicol Pharmacol. 30:57-62. 1999.

I.O. Ogbonna, B.I. Agbowu, Agbo, “Proximate composition, microbiological safety and heavy metal contaminations of garri sold in Benue, North-central, Nigeria.” Afr. J. Biotechnol. 16(18); 1085-1091. 2017..

J.E. Emurotu, U.M. Salehedeen, O.M. Ayeni, “Assessment of heavy metal in cassava flour sold in Anyiba market, Kogi State, Nigeria.” J. Adv. Sci. Res. 3(5): 2444-2448. 2012




DOI: https://doi.org/10.24071/ijasst.v7i2.11760

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