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Showing 4 results for Bioaccumulation
Toxicity of Silver Nanoparticles in Persian Sturgeon (Acipenser persicus) and Starry Sturgeon (Acipenser stellatus) during Early Life Stages
Ashkan Banan, Mohammad Reza Kalbassi Masjed Shahi, Mahmoud Bahmani, Mohammad Ali Yazdani Sadati,
Volume 5, Issue 1 (6-2016)
Abstract
Silver nanoparticles (AgNPs) are widely used in consumer products mainly due to their antimicrobial action. The rapid increase in the use of nanoparticles has driven more attention to their possible ecotoxicological effects. In this study: first, acute effects of colloidal AgNPs during embryonic stage of Persian sturgeon and Starry sturgeon were investigated and then in Starry sturgeon, their short-term effects during early life stages (before active feeding commences) were analyzed. Based on the obtained results from the acute toxicity tests, AgNPs induced a dose-dependent toxicity in both species during early life stages. The short-term toxicity test was performed using 0, 0.025, 0.05 and 0.1 mg/l of colloidal AgNPs. Silver accumulation in larvae exposed to 0.1 mg/l AgNPs was recorded significantly higher than the control treatment (P<0.05). However, the obtained survival rate data did not indicate any significant differences among treatments.
Using Saccostrea cucullata as a biomonitor of heavy metals (Cu, Pb, Zn, Cd, Ni, and Cr) in water and sediments of Qeshm Island, Persian Gulf

Volume 8, Issue 3 (7-2020)
Abstract
Aims: The current study investigated the concentration of Cu, Pb, Zn, Cd, Ni, and Cr in shell and soft tissue of Saccostrea cucullata, water, and sediments of seven stations in Qeshm Island of Persian Gulf.
Materials & Methods: The samples were digested by a combination of nitric acid and perchloric acid and the concentration of elements was measured by atomic absorption spectroscopy.
Findings: The results indicated that the concentrations of Cu and Zn in all samples, Ni in the sediment and Cd in oyster were the highest bio-water accumulation factor were significantly higher than those of bio-sediment accumulation factor. Also, these factors in the soft tissue were higher than in the shell. Furthermore, the macro-concentrators of soft tissue were Cd, Cu, and Zn, while the macro-concentrator of shell was Cd.
Conclusion: The shell can be an appropriate monitoring tool for evaluating Cu and Zn in water and Cu in sediments. Also, the soft tissue can be practical for monitoring Cu and Zn in sediments.

Study of heavy metal bio-accumulation in the edible muscle tissue of Common carp (Cyprinus carpio linnaeus, 1758) from the Siah Darvishan River, Guilan province, Iran

Volume 16, Issue 86 (4-2019)
Abstract
In this research, bioaccumulation of ten metals (As, Fe, Hg, Zn, Pb, Se, Cd, Cu, Mn, Ni) in muscle tissue of 30 Common carp (Cyprinus carpio) Caught with cast net from Siah Darvishan River, Guilan province, Iran in the summer season of 2016 were investigated by Varian Atomic absorption spectroscopy. The lowest and highest mean concentration of metals were found, as follows: Zinc 30.81 - 33.19, Iron 26.47 - 31.33, Copper 3.97 - 4.62, Lead 0.79 - 0.95, Arsenic 0.73 - 0.82, Manganese 0.59 - 0.68, Selenium 0.49 - 0.57, Cadmium 0.17 - 0.18, Nickel 0.16 - 0.18 and Mercury 0.08 - 0.09 microgram per gram dry weight, respectively. According to the results of this study, mean concentrations of all elements in the muscle tissue of Common carp, except for Arsenic (0/774 ± 0/047), Lead (0/852 ± 0/084) and Manganese (0/642 ± 0/045) were observed to be lower than determined threshold limit value of FAO/WHO international standard.

Heavy Metals Content in Water, Sediment, and Fish (Mugil Cephalus) From Koycegiz Lagoon System in Turkey: Approaches for Assessing Environmental and Health Risk

Volume 20, Issue 1 (1-2018)
Abstract
The concentration of heavy metals (Hg, Cd, As, Cu, Pb, Cr, and Zn) in the water, sediment and fish (Mugil cephalus) were investigated from different sites on Köyceğiz Lagoon System. Potential ecological risk analysis of heavy metal concentrations in sediments underlined considerable ecological risk for two sites of the lagoon during winter and spring. The ratio of transfer factors of Hg, Cr, Cu, Zn, and As in fish from water was higher than 1, which means that fish undergo bioaccumulation of these elements from lagoon water. The determination of individual Target Hazard Quotients (THQs) in fish tissue indicated safe levels for the local people, but there is a possible risk in terms of total THQ because the highest THQ value of As suggests that they may experience a certain degree of adverse health effect.
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