khadijeh nemati
Abstract
Polycyclic aromatic compounds in the marine environment are often chemically stable and resistant to the toxic effects of these compounds can be carcinogenic properties and genetic changes noted. The study of Microalgae Tetraselmis sp for the removal of aromatic compounds benzo[a]pyrene and chrysene ...
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Polycyclic aromatic compounds in the marine environment are often chemically stable and resistant to the toxic effects of these compounds can be carcinogenic properties and genetic changes noted. The study of Microalgae Tetraselmis sp for the removal of aromatic compounds benzo[a]pyrene and chrysene ring of the effluent was Bandar Imam Petrochemical . Cultivation of Microalgae in order to achieve the desired number , petrochemical wastewater samples were subjected Microalgae . The reduction in the concentration of aromatic compounds by Microalgae were measured by HPLC showed that the removal of the two compounds at a concentration of benzo[a]pyrene./5 mg L, 49/6% ± 1.8 and the concentration chrysene 5/55 mg L,33/23% ± 1.2 respectively have been . The results showed that species have the ability to reduce aromatic compounds and is also suitable for petrochemical wastewater.
Abstract
The Study of Petrochemical Industries Sewage Effects on the Water Quality in Khor Musa Abstract Imam Khomeini petrochemical complex is situated at the northwest part of the Persian Gulf where discharged its sewage to the seawater.Samples were collected using Van Dorn sampler, bimonthly from four ...
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The Study of Petrochemical Industries Sewage Effects on the Water Quality in Khor Musa Abstract Imam Khomeini petrochemical complex is situated at the northwest part of the Persian Gulf where discharged its sewage to the seawater.Samples were collected using Van Dorn sampler, bimonthly from four sites during December 2009 to May 2010. The seawater physicochemical parameters such as DO, pH, BOD, total ammonia, total phosphorous and turbidity were measured and among them, BOD (5.05ppm), total ammonia (2.51ppm) and total phosphorous (0.3ppm) showed higher than standard values. Based on water quality scoring (WQS), all sites showed 2.66 values which classified as bad water quality. During this study, BOD, total ammonia and phosphorous showed significantly (p
Ali Azimi; Alireza Safahieh; Ali Dadollahi Sohrab2; Hossein Zolgharnein1; Ahmad Savari
Volume 10, Issue 3 , September 2012, , Pages 23-32
Abstract
Heavy metals are major group of dangerous contaminants in marine environment. Due to their persistence, they may enter aquatic food chains and transfer from one trophic level to another. They also may be harmful for human being which is placed at the top of the food chain. Imam Khomeini’s Port ...
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Heavy metals are major group of dangerous contaminants in marine environment. Due to their persistence, they may enter aquatic food chains and transfer from one trophic level to another. They also may be harmful for human being which is placed at the top of the food chain. Imam Khomeini’s Port is located in the north west end of Persian Gulf and ships traffic and several industries especially petrochemical industries around of the port, discharge various organic and non-organic contaminants such as heavy metals into this ecosystem. In this study in order to investigate the levels of heavy metals (Hg, Cd, Pb and Cu) in soft tissue of oyster Crassostrea gigas from Imam Khomeini port, oysters of the same size were sampled on March 2010 from 5 different locations including harbors of Petroshimi, Doc Sorsoreh, 15, 28 and 33 in the Imam Khomeini port. The samples were freeze dried and acid digested in order to determine their heavy metal content with atomic absorption spectrophotometry. Results indicated that the content of Hg, Cd, Pb and Cu in the oysters’ soft tissue were 3.12±2.97, 7.56±3.62, 7.1±3.30 and 440.57±66.17 µg/g of dry weight, respectively. The highest level of Hg, Pb and Cu were recorded in harbor of Petroshimi while the highest level of Cd was measured in harbor no 15.The concentration of Hg, Cd, Cu and Pb in bivalve soft tissue was more than standard limits. This can be dangerous for public health therefore regular monitoring of heavy metals in the area is recommended.
Mostafa Alahverdi; Ali Dadolahi-Sohrab; Alireza Safahiyeh; Ahmad Savari
Volume 10, Issue 4 , September 2012, , Pages 55-66
Abstract
In this research, bioaccumulation ability of seaweed species Ulva intestinalis and Sargassum angustifolium to heavy metals (Ni, Cd, Cu and Pb) and possible use of their chlorophylls content as biomarker of metals stress was studied. Samples of seaweeds and sediment were collected from four stations along ...
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In this research, bioaccumulation ability of seaweed species Ulva intestinalis and Sargassum angustifolium to heavy metals (Ni, Cd, Cu and Pb) and possible use of their chlorophylls content as biomarker of metals stress was studied. Samples of seaweeds and sediment were collected from four stations along the province of Bushehr coastal areas during January 2008 and June 2009. Chlorophylls of seaweeds were extracted using aceton (90%) and content of chlorophylls were determined spectrophotometrically. Metals in sediment and seaweeds were extracted using hot concentrated nitric acid (65%) and analysed by atomic absorption spectrophotometery. The mean concentrations of Ni, Cd, Cu, Pb in sediment were 32.17, 6.38, 6.90, 45.96 µg. g-1 dry weight, in U. intestinalis 29.28, 4.08, 6.78, 32.08 µg. g-1 dry weight, and in S. angustifolium 15.00, 3.78, 5.13 and 18.30 µg. g-1 dry weight, respectively. Pearson correlation coefficients between metals in sediment and seaweeds showed significant correlation between Pb in sediment and U. intestinals and Cd and Pb in sediment and S. angustifolium. The results revealed, variations of Chlorophylls content in S. angustifolium has been shown to be a better indicator of environmental stress compare to U. intestinalis
Ahmad Shadi; Ahmad Savari; Preeta Kochanian; Simin Dehghan Madiseh; Yaseman Gandomi
Volume 10, Issue 3 , September 2012, , Pages 69-78
Abstract
During one year survey (January to December 2007), Khouzestan coastal waters in the north west of Persian Gulf were examined to investigate juvenile fishes distribution, density and biomass. Monthly juvenile fish samples were caught using a 360 hp research vessel towing a 24 mm mesh size bottom trawl. ...
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During one year survey (January to December 2007), Khouzestan coastal waters in the north west of Persian Gulf were examined to investigate juvenile fishes distribution, density and biomass. Monthly juvenile fish samples were caught using a 360 hp research vessel towing a 24 mm mesh size bottom trawl. Trawling was carried out at 10 randomly selected stations. Distribution map for dominant species was prepared and biomass and CPUA was estimated in the study area. Highest and lowest CPUA was observed in October and December, repectively.Biomass fluctuations showed increasing trend during warm seasons.Significant correlation was recorded between environmental parameters (water temperature and salinity) with biomass and number of species per month in the study area.