Abstract
Heavy metals contamination into food chain is considered as an emerging crisis throughout the world especially in developing countries like Bangladesh. The concentration of heavy metals including Cr and Pb in commercial poultry feed samples (protein meal feed, meat and bone meal and fish meal feed) were detected by using Air/ Acetylene Flame Atomic Absorption Spectrophotometer. The mean concentration of heavy metals were found in protein meal feed in a range where Cr 10.63 to 218.10 mg kg-1 and Pb 7.37 to 52.25 mg kg-1. In meat and bone meal feed samples, Cr was recorded from 9.15 to 40.59 mg kg-1 and Pb 5.0 to 61.42 mg kg-1. Cr was found 17.68 to 78.39 mg kg-1 and Pb 3.54to 16.44 mg kg-1 in fish meal feed samples. However, results showed that all feed samples contained chromium and lead where both metals were present at alarming levels in most of the samples. It is therefore suggested that regular detection of heavy metals especially Cr and Pb should be done to evaluate the health risks and to protect the end user from food that might harmful for their health.Int. J. Agril. Res. Innov. & Tech. 6 (2): 57-60, December, 2016
Highlights
The tanning industries of Hazaribagh, Bangladesh are manufacturing hide about 220 metric ton day-1 with the discharge of 600-1000 kg of solid waste/ton processed hide
In case of protein feed meal samples highest chromium concentration was found in brand PM5 (218.10 mg kg-1) and lowest chromium concentration was found in brand PM7 (10.63 mg kg-1)
The source of chromium in poultry feed samples could be from tannery solid waste and 3956 mg L-1 Cr might be presented in its effluent (Tariq, 2009)
Summary
The tanning industries of Hazaribagh, Bangladesh are manufacturing hide about 220 metric ton day-1 with the discharge of 600-1000 kg of solid waste/ton processed hide. The tannery solid wastes are used as poultry feed, fish feed, and in production of organic fertilizers by converting to protein-concentrate with some treatment. Numerous large and small mills are established to renovate proteinconcentrate (about 200-250 tons day-1) from tannery solid wastes. Chromium (Cr), is one of the significant threats, utilized as a part of the tanning processes. Through bioaccumulation heavy metals are responsible for producing some toxicity in human such as neurotoxicity, nephrotoxicity, fetotoxicity and teratogenicity which may led disturbance in blood, gastrointestinal, nervous systems and cardiovascular system, changes in the detoxification pathways (colon, kidney, liver, skin), release and functioning of various hormone. Because of heavy metal contamination, mental behaviour, neurological functions and utilization of neurotransmitter may be deviated in human body (Iftikhar et al, 2014)
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