title: Heavy metal contamination of freshwater prawn (Macrobrachium rosenbergii) and prawn feed in Bangladesh: A market-based study to highlight probable health risks.
abstract: An assessment of the dietary risk of heavy metal exposure to humans is important since it is the main source of exposure. This study aimed to estimate the degree of contamination and assess the probable health risk in the prawn food chain. In prawn feed, the concentrations of metals were detected in the following order: Hg > Co > Pb > Cd. The concentrations of heavy metals in prawn were the highest for Co and lowest for Cd. Trace amounts of As and Cr were detected in the analyzed sample. Target hazard quotients for heavy metals for adults were >1 for Pb, Cd, Hg, and Co, and for children, the same were high for Co and Hg, indicating significant health risks upon dietary exposure. All the prawn samples contained nine-fold and fourteen-fold higher concentrations than the maximum acceptable levels for Pb and Hg, respectively (0.5 mg kg-1; WHO/FAO). Human health risk due to the Co exposure is quite alarming as the level of exposure was found to be very high. In the prawn samples intended for human consumption, the hazard index (HI) was highest in the samples obtained from Bagerhat (3.25 in flesh and 3.26 in skin), followed by the samples obtained from Satkhira (2.84 in flesh and 3.10 in skin) and Dhaka City Corporation (2.81 in flesh and 3.42 in Skin); this indicates a potential risk of prawn consumption obtained from Southeast Bangladesh. This is particularly problematic as this area accounts for the majority of prawn production and export of the country.
authors.affiliation: Department of Food Engineering and Tea Technology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh. Electronic address: rabi-ttc@sust.edu.
authors.forename: G M
authors.initials: GM
authors.lastname: Rabiul Islam
authors.affiliation: Department of Food Engineering and Tea Technology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh.
authors.forename: Mohammad Ruzlan
authors.initials: MR
authors.lastname: Habib
authors.affiliation: Research, Learning, and Evaluation Unit, Helen Keller International, Bangladesh.
authors.forename: Jillian L
authors.initials: JL
authors.lastname: Waid
authors.affiliation: Chemistry Division, Bangladesh Atomic Energy Centre, Dhaka, Bangladesh.
authors.forename: M Safiur
authors.initials: MS
authors.lastname: Rahman
authors.affiliation: Chemistry Division, Bangladesh Atomic Energy Centre, Dhaka, Bangladesh.
authors.forename: J
authors.initials: J
authors.lastname: Kabir
authors.affiliation: Chemistry Division, Bangladesh Atomic Energy Centre, Dhaka, Bangladesh.
authors.forename: S
authors.initials: S
authors.lastname: Akter
authors.affiliation: Chemistry Division, Bangladesh Atomic Energy Centre, Dhaka, Bangladesh.
authors.forename: Y N
authors.initials: YN
authors.lastname: Jolly
mesh_terms: D000328:Adult; D000818:Animals; D001459:Bangladesh; D002648:Child; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D005618:Fresh Water / Q000737:chemistry*; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D033541:Palaemonidae / Q000737:chemistry* / Q000254:growth & development; D018570:Risk Assessment; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Bangladesh; Health risk; Heavy metal contamination (Pb, Cd, Co, Hg, As and Cr); Macrobrachium rosenbergii; Prawn and its feeds