Evaluation of Levels of Cadmium, Chromium and Lead in Bio Fertilizer from Various Feed Stocks and in Inorganic Fertilizers Used in Kenya

Main Article Content

J. G. Kinaichu
C. G. Nyaga
P. Njogu
E. G. Gatebe

Abstract

This study was conducted to compare the levels of selected heavy metals (Pb, Cr and Cd) in inorganic fertilizers and bio slurry from different feed stocks. Bio slurry samples from chicken droppings, cow dung and pig wastes were analyzed for levels of selected heavy metals. Inorganic fertilizers for analysis DAP, CAN, Urea and NPK were procured from local market in Juja town next to Jomo Kenyatta University of Agriculture and Technology (JKUAT). Bio slurry samples were collected from Githunguri Sub County in Kiambu County and from mini digesters set up at JKUAT. Concentrations of Cd, Cr, and Pb were determined by Flame Atomic Absorption Spectrophotometer (Shimadzu 6200). Inorganic fertilizers were found to contain detectable amounts of lead metal. DAP had the highest amount of Pb at 0.03 mg/l followed by CAN (0.02 mg/l) Urea and NPK had 0.01 mg/l each. Bio slurry samples contained lower amounts of lead which was below detectable limit in chicken litter and pig wastes. Inorganic fertilizers contained Cd with the highest levels being in the phosphorous containing fertilizers DAP (0.41 mg/l) and NPK (0.48 mg/l). All samples contained Cr with the highest in bio slurry samples being 0.09 mg/l in cow dung collected from Githunguri. CAN had the highest level of Cr (0.08 mg/l) among the inorganic fertilizers. Bio slurry is a better alternative fertilizer in reducing heavy metal uptake and their subsequent bioaccumulation.

Keywords:
Fertilizer, bio-slurry, heavy metal, bioaccumulation, toxin, agriculture, food safety.

Article Details

How to Cite
G. Kinaichu, J., G. Nyaga, C., Njogu, P., & G. Gatebe, E. (2020). Evaluation of Levels of Cadmium, Chromium and Lead in Bio Fertilizer from Various Feed Stocks and in Inorganic Fertilizers Used in Kenya. Asian Journal of Chemical Sciences, 7(1), 38-42. https://doi.org/10.9734/ajocs/2020/v7i119014
Section
Original Research Article

References

Satinder KB. Shelf-life of biofertilizers: An accord between formulations and genetics. Journal of Biofertilizers & Biopesticides. 2012;03(05). Available:https://doi.org/10.4172/2155-6202.1000e109

Cordell D, Drangert JO, White, S. The story of phosphorus: Global food security and food for thought. Global Environmental Change. 2009;19(2):292–305.
Available:https://doi.org/10.1016/j.gloenvch a.2008.10.009

Gupta DK, Chatterjee S, Datta S, Veer V, Walther C. Role of phosphate fertilizers in heavy metal uptake and detoxification of toxic metals. Chemosphere. 2014;108: 134–144.
Available:https://doi.org/10.1016/j.chemosphere.2014.01.030

Lopes C, Herva M, Franco-uría A, Roca E. Inventory of heavy metal content in organic waste applied as fertilizer in agriculture : Evaluating the risk of transfer into the food chain. 2011;918–939.
Available:https://doi.org/10.1007/s11356-011-0444-1

Bothe H. Detoxification of Heavy Metals. 2011;30:35–58.
Available:https://doi.org/10.1007/978-3-642-21408-0

Thomas E, Omueti J. (2012). The effect of phosphate fertilizer on heavy metal in soils and Amaranthus caudatus. Agriculture and Biology Journal of North America. 2012;3(4):145–149.
Available:https://doi.org/10.5251/abjna.2012.3.4.145.149

Morales N, Boehler MA, Buettner S, Liebi C,Siegrist H. Recovery of N and P from urine by struvite precipitation followed by combined stripping with digester Sludge liquid at full scale. Water. 2013;5:1262–1278. Available:https://doi.org/10.3390/w5031262 Available:https://doi.org/10.5114/bta.2015.57730

Chibueze U, Dickson O, Chinwendu S. Heavy metal contents of inorganic and organic fertilizers commonly used in Southeast Nigeria. American Open Agricultural Science & Technology Journal. 2013;1(1):1–09.
Available:http://rekpub.com/Journals.php

Kupper T, Bürge D, Bachmann HJ, Güsewell S, Mayer J. Heavy metals in source-separated compost and digestates. Waste Management. 2014;34(5):867–874.
Available:https://doi.org/10.1016/j.wasman.2014.02.007

Odlare M, Lindmark J, Ericsson A., Pell, M. Use of organic wastes in agriculture. In Energy Procedia. Elsevier B.V. 2015;75: 2472–2476.
Available:https://doi.org/10.1016/j.egypro.2015.07.225

Brar SK, Sarma SJ, Chaabouni E. Shelf-life of biofertilizers : An accord between formulations and genetics. J Biofertil Biopestic. 2012;3(5).
Available:https://doi.org/10.4172/2155-6202.1000e109

Benson N. Trace metals levels in inorganic fertilizers commercially available in Nigeria. Journal of Scientific Research and Reports. 2014;3(4):610–620.
Available:https://doi.org/10.9734/jsrr/2014/7465