Levels of PAHs, PCBs, and toxic metals in Ruditapes philippinarum and Donax trunculus in Marmara Sea, Turkey

2020 ◽  
Author(s):  
İbrahim E Künili ◽  
Serhat Çolakoğlu ◽  
Fatma Çolakoğlu
Keyword(s):  
Toxic Metals ◽  
Ruditapes Philippinarum ◽  
Marmara Sea ◽  
Donax Trunculus

Accumulation of essential and toxic metals in sediment from the Marmara Sea along Tekirdağ coast: risk assessment for ecological health

2019 ◽  
Vol 169 ◽  
pp. 166-172 ◽  
Author(s):  
Ayse Handan Dökmeci ◽  
Temine Sabudak ◽  
Veysi Dalmış
Keyword(s):  
Risk Assessment ◽  
Toxic Metals ◽  
Marmara Sea ◽  
Ecological Health

Bioaccumulation of essential and toxic metals in four different species of bottom fish in the Marmara Sea, Tekirdag, Turkey: risk assessment to human health

2019 ◽  
Vol 148 ◽  
pp. 213-221 ◽  
Author(s):  
Ayse Handan Dökmeci ◽  
Temine Sabudak ◽  
Veysi Dalmış
Keyword(s):  
Risk Assessment ◽  
Human Health ◽  
Toxic Metals ◽  
Marmara Sea ◽  
Bottom Fish

scholarly journals Antioxidant Activity of Mytilus galloprovincialis and Ruditapes philippinarum

2019 ◽  
Vol 7 (sp1) ◽  
pp. 150
Author(s):  
Sehat Çolakoğlu ◽  
Gülen Türker ◽  
İlknur Ak ◽  
Fatma Çolakoğlu
Keyword(s):  
Antioxidant Activity ◽  
Mytilus Galloprovincialis ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Ruditapes Philippinarum ◽  
Butylated Hydroxytoluene ◽  
Carotenoid Content ◽  
Marmara Sea ◽  
Scavenging Activity ◽  
Total Carotenoid

This study reports on the evaluation of the antioxidant of ethanolic extracts of Mytilus galloprovincialis and Ruditapes philippinarum collected from the Marmara Sea. The antioxidant activity of the two bivalve species was evaluated using the 2,2-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging method. The total carotenoid contents were also determined. In the DPPH method, all extracts exhibited low radical scavenging activity when compared to the standards used, i.e. -tocopherol and butylated hydroxytoluene (BHT) with the inhibition percentage in the range of 35.87±0.05 – 36.27±0.02%. In particular, M. galloprovincialis exhibited the highest radical scavenging activity with an IC50 value of 29.55±0.02 mg/g Ext. However, there are no statistically significant differences in the IC50 values of two species. The highest total carotenoid content was found in M. galloprovincialis as 1.13±0.02 µg/g sample. The statistically significant differences were found in total carotenoid contents of two bivalves. In this study in M. galloprovincialis was also found to be high in carotenoid content, while R. philippinarum was found to be almost nonexistent. More detailed studies are needed to determine relationship between the bioactive compounds of crustaceans and their antioxidant activities, distributed in our country.

Nano mop for toxic metals

Nature India ◽  
2008 ◽  
Keyword(s):  
Toxic Metals

Production of asari (Manila) clams, Ruditapes philippinarum, during the period of harvest decrease in the 2000s in the Banzu tidal area, Tokyo Bay

2020 ◽  
Vol 33 ◽  
pp. 14
Author(s):  
Mitsuharu Toba ◽  
Jun Kakino ◽  
Kazuo Tada ◽  
Yutaka Kobayashi ◽  
Hideharu Tsuchie
Keyword(s):  
Field Investigation ◽  
Ruditapes Philippinarum ◽  
Management Style ◽  
Seed Stock ◽  
Tokyo Bay ◽  
Yearly Variation ◽  
Culture Area ◽  
Stock Biomass ◽  
Tidal Area ◽  
High Level

In Tokyo Bay, the harvestable quantity of asari (Manila) clams Ruditapes philippinarum has been decreasing since the late 1990s. We conducted a field investigation on clam density in the Banzu culture area from April 1988 to December 2014 and collected records spanning January 1986 to September 2017 from relevant fisheries cooperative associations to clarify the relationship between the temporal variation in stock abundance and the production activities of fishermen. The yearly variation in clam abundance over the study period was marked by larger decreases in the numbers of larger clams. A large quantity of juvenile clams, beyond the biological productivity of the culture area, may have been introduced as seed stock in the late 1980s despite the high level of harvestable stock. The declines in harvested quantity began in the late 1990s and may have been caused by decreases in harvestable stock despite the continuous addition of seed stock clams. The harvested quantity is likely to be significantly dependent upon the wild clam population, even within the culture area, as the harvestable quantity was not correlated with the quantity of seed stock introduced during the study period. These declines in harvested quantity may have resulted from a decreasing number of operating harvesters due to the low level of harvestable stock and consequently reduced profitability. Two findings were emphasized. A certain management style, based on predictions of the contributions of wild and introduced clams to future stock biomass, is essential for economically-feasible culturing. In areas with less harvestable stock, actions should be taken to maintain the incomes of harvesters while avoiding overexploitation, even if the total harvest quantity decreases.

Persistent organic pollutants and toxic metals in foods

2013 ◽  
Author(s):  
Martin Rose ◽  
Alwyn Fernandes
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Toxic Metals

Chemical stabilization of toxic metals in soil microcosms

2009 ◽  
Vol 17 (3) ◽  
pp. 483-494 ◽  
Author(s):  
Viktoria Feigl ◽  
Nikolett Uzinger ◽  
Katalin Gruiz
Keyword(s):  
Toxic Metals ◽  
Chemical Stabilization ◽  
Soil Microcosms

Study of the Cu(II) removal from aqueous solutions by adsorption on titania

2013 ◽  
Vol 12 (3) ◽  
pp. 239-247
Keyword(s):  
Heavy Metals ◽  
Ionic Strength ◽  
Toxic Metals ◽  
Low Cost ◽  
Lateral Interaction ◽  
Tio2 Surface ◽  
High Toxicity ◽  
Removal Of Heavy Metals ◽  
Solution Parameters ◽  
Kinetics Of

The removal of heavy metals from wastewaters is a matter of paramount importance due to the fact that their high toxicity causes major environmental pollution problems. One of the most efficient, applicable and low cost methods for the removal of toxic metals from aqueous solutions is that of their adsorption on an inorganic adsorbent. In order to achieve high efficiency, it is important to understand the influence of the solution parameters on the extent of the adsorption, as well as the kinetics of the adsorption. In the present work, the adsorption of Cu(II) species onto TiO2 surface was studied. It was found that the adsorption is a rapid process and it is not affected by the value of ionic strength. In addition, it was found that by increasing the pH, the adsorbed amount of Cu2+ ions and the value of the adsorption constant increase, whereas the value of the lateral interaction energy decreases.

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