title: Assessment of trace metals in fish species of urban rivers in Bangladesh and health implications.
abstract: Levels of six metals i.e. chromium (Cr), nickel (Ni), copper (Cu), arsenic (As), cadmium (Cd) and lead (Pb) in three fish species (Channa punctatus, Heteropneustes fossilis and Trichogaster fasciata) from three urban rivers in Bangladesh were measured. Concentrations of Cr, Ni, Cu, As, Cd and Pb in fish species were 0.75-4.8, 0.14-3.1, 1.1-7.2, 0.091-0.53, 0.007-0.13, and 0.052-2.7mg/kg ww, respectively. The analyzed metals were significantly different between species and seasons (p<0.05). The target hazard quotients (THQs) and carcinogenic risk (CR) for individual metal showed that As and Pb in muscle was particularly hazardous and potential risk for the low, medium and high fish consumer in Bangladesh. Some of the trace metals' concentrations are higher than the recommended value, which suggest that the water and fish of these rivers are not completely safe for human health.
authors.affiliation: Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan; Department of Soil Science, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh. Electronic address: islam-md.saiful-nj@ynu.jp.
authors.forename: Md Saiful
authors.initials: MS
authors.lastname: Islam
authors.affiliation: Department of Oceanography, University of Dhaka, Dhaka 1000, Bangladesh.
authors.forename: Md Kawser
authors.initials: MK
authors.lastname: Ahmed
authors.affiliation: Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan; Department of Fisheries, University of Dhaka, Dhaka 1000, Bangladesh.
authors.forename: Md
authors.initials: M
authors.lastname: Habibullah-Al-Mamun
authors.affiliation: Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan.
authors.forename: Shigeki
authors.initials: S
authors.lastname: Masunaga
mesh_terms: D000328:Adult; D000818:Animals; D001151:Arsenic / Q000032:analysis*; D001459:Bangladesh; D004784:Environmental Monitoring; D005399:Fishes; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D009132:Muscles / Q000737:chemistry; D018570:Risk Assessment; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: Bangladesh; Fish; Health risk; River; Trace metals