Heavy metal Concentration in Belanger's Croaker Fish, Johnius belangerii from Petrochemical Waste Receiving Estuary in the Persian Gulf, Iran

Abstract. Musa Estuary is receives various type of discharges such as petrochemical, industrial and urban waste, it also is a habitat for Johnius belangerii. This study was carried out to determine heavy metal concentrations in J. belangerii. Fish samples were taken from 5 creeks and acid digested for their heavy metal contents. Results showed that the highest level of Cd, Co, Cu, Ni and Pb was 7.21, 1.08, 1.12, 2.72 and 4.57 in liver, 1.88, 1.04, 2.09, 9.43 and 6.83 in gill and 0.14, ND, 5.61, 2.43 and 3.78 in muscle respectively. The level of heavy metals in muscle was lower than WHO standard, however the level of metals in fish were decreased by the increase of distance from PETZON. It is suggested that biomonitoring of contaminants in this estuary could serve as a good estimate of environmental health

Metallic functionalization of magnetic nanoparticles enhances the selective removal of glyphosate, AMPA, and glufosinate from surface water

Glyphosate (GLY) is the most used herbicide worldwide, raising concerns due to its toxicity and mobility in water. The concurrent spread of similar herbicides, i.e., glufosinate (GLUF) and aminomethylphosphonic acid (AMPA, a metabolite of GLY), also causes a serious concern to the environment. The application of magnetic nanoparticles (MNPs) gained wide attention as a promising approach for the environmental remediation of GLY. However, the fast agglomeration, low removal efficiency, and saturation of MNPs by non-target chemicals remain a challenge. Herein, we used polydopamine as a coating agent followed by functionalization with different metal ions, i.e. Ti(iv), Zr(iv), and Cu(ii), for selective removal of GLY, AMPA, and GLUF from deionised water in laboratory trials. Finally, we tested the performance of MNPs in surface waters contaminated with GLY at 0.17 & PLUSMN; 0.02 & mu;g L-1. The GLY removal efficiency (RE, %) of MNPs was optimized by using different GLY to MNP ratios and incubation times, in the presence of GLY-analogues and competitive species, i.e., phosphates. The results indicate that all metallic functionalized MNPs are more stable toward aggregation and effective in removing GLY than bare MNPs, up to 150 & mu;g L-1. The optimal ratio was 500 & mu;g(GLY) g(MNPs)(-1) (50 & mu;g GLY to 100 mg MNP), with RE > 80%. MNPs functionalized with Ti(iv) and Zr(iv) performed more efficiently than MNPs functionalized with Cu(ii), reaching an RE of 99.9% after a incubation time of 15 min. The presence of Ti(iv) and Zr(iv) in the MNPs increased the selectivity of the particles toward GLY and GLY analogues that can be removed with similar efficiency, and prevented competition with phosphates at much higher concentrations (1000 & mu;g L-1). Finally, GLY analogues can be easily re-eluted with ammonia, and the functionalized MNPs can be efficiently re-used up to four cycles. The use of metal-functionalized MNPs is a promising approach for the removal of target pollutants from contaminated water

The effect of size and sex on PCB and PAH concentrations in crab Portunus pelagicus

Polychlorinated biphenyl and polycyclic aromatic hydrocarbon concentrations in the hepatopancreas of blue swimming crab (Portunus pelagicus) from the north Persian Gulf were measured. In addition, the relationships between crab size (carapace width) and polychlorinated biphenyl (PCB) and polycyclic aromatic hydrocarbon (PAH) levels in hepatopancreas were investigated by linear regression analysis. Among the PCBs, congeners 110 and 153 were the most frequent and abundant. The results showed that, except in a few cases, significant relationships between PCB and PAH levels and crab size were positive. Comparison between male and female indicated that the average PCB16, 44, 153, and acenaphthylene, acenaphthene, and anthracene concentrations in hepatopancreas of male crab were found to be significantly higher than those found in the female crab

Heavy metals' concentration in sediment, shrimp and two fish species from the northwest Persian Gulf

The concentrations of heavy metals (cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn)) were measured in hepatopancreas and muscle of a commercial shrimp (Metapenaeus affinis), in the muscle, liver and gills of two fish species (Thryssa vitrirostris and Johnius belangerii) and in the sediment samples taken from the mouth of the Arvand river, Meleh estuary and Musa estuary in the northeast Persian Gulf. Concentration of heavy metals varied depending on different tissues, species and sampling sites. Liver of fish and hepatopancreas of shrimp exhibited higher metals' concentration than the other tissues. Generally, in the mouth of the Arvand river, the highest concentration of metals was found in benthic species; while in the mouth of Musa estuary, the highest level of the metals was found in pelagic fish species. Bioaccumulation factors were observed to follow the order: J. belangerii-liver-Cd > T. vitrirostris-liver-Pb > M.affinis-hepatopancreas-Zn >M.affinis-hepatopancreas-Cu >M.affinis- hepatopancreas-Ni. The analysed heavy metals were found in sediment samples at mean concentration in the sediment quality guideline proposed by National Oceanic and Atmospheric Administration (NOAA) and Regional Organization for the Protection of The Marine Environment (ROPME), except for Ni concentration in some cases

Level of Cd, Hg, Mn and Pb in sediment and invertebrate of North Persian Gulf

561-563During present study the concentration of Cd, Hg, Mn and Pb in sediment and Invertebrate of Musa estuary, Hendijan, and Boshehr coasts was determine using atomic absorption spectrometer. The results showed that the highest level of Cd, Hg and Mn was observed in Musa estuary sediment and organisms. The maximum concentration of Pb was recorded in Boshehr coast. Musa estuary receives heavy metals from petrochemical units that are established a decade ago in the area, while Bosherhr coast is suffering from huge amounts of tankers traffic and oil transportation in its bank. The correlation between metals level in sediment and Invertebrate showed that there are significant correlation between Hg concentration in sediment and portunus pelagicus. </span

Spatial and seasonal variations of heavy metal concentration in sediment, Musa estuary (Persian Gulf)

849-857Total concentration of Cd, Co, Cu, Ni, Pb and Fe, as well as geo-accumulation indicator and Enrichment factor were determined in Musa estuary in winter and summer. A GBC flam atomic absorption spectrometer was applied to measure the heavy metals concentration. Jafari and Ghazale creeks were the most polluted creeks among the other creeks. Geoaccumulation indicator shows that Zangi creek is moderately polluted by Pb element in winter. Enrichment factor indicated that Co inJafari, Ahmadi and Zangi creeks have moderately enrichment in summer and winter while Pb in Zangi creek has significant enrichment in winter. Relationship amongst the metals demonstrated that Co-Pb, Fe-Cu and Fe-Pb in summer and Cd-Co, Co-Cu and Ni-Fe have significant correlations

Heavy metal concentration in sediment, benthic, benthopelagic, and pelagic fish species from Musa Estuary (Persian Gulf)

The concentration of Cd, Co, Cu, Ni, and Pb was measured in sediment and three fish species collected from Musa Estuary, Persian Gulf. The concentration order of heavy metals in sediment were Ni > Co > Cu > Pb > Cd >. Concentrations of the heavy metals in the fish were apparently different among the three species. The concentrations of Cd and Ni in fish were Johnius belangerii > Euryglossa orientalis > Liza abu, while the Co and Cu levels were L. abu > E. orientalis > J. belangerii and E. orientalis > L. abu > J. belangerii, respectively. Result of regression analysis showed that there were no significant relationships between metal concentration in fish tissues and sediment, except for Ni concentration in the J. belangerii liver. The concentrations of studied metals in fish muscle were below the permissible limits proposed by FAO, WHO, and EC