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  • Articles  (8)
  • Marine pollution  (5)
  • Chemical analysis  (3)
  • Chemistry
  • United States
  • Alexandria: National Institute of Oceanography and Fisheries  (5)
  • Nigerian Institute for Oceanography and Marine Research  (3)
  • 2005-2009  (8)
  • 1
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    Geochemical and environmental studies of recent marine sediments and some hard corals of Wadi El-Gemal area of the Red Sea, Egypt (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This Journal is published by National Institute of Oceanography and Fishereies, Alexandria, Egypt
    Description: The distribution of (Fe, Mn, Zn, Cu, Pb, Ni, Co and Cd) concentrations were determined in surface marine sediments and coral reefs at Wadi El-Gemal in the Red Sea area. There were significant differences in concentrations of heavy metals in the marine sediments relative to the coral reefs. Some heavy metal concentrations in sediments and coral reefs in the study area are high compared to that in the impact areas of the Egyptian Red Sea coast. The results indicate that the high concentrations of heavy metals in marine sediments and coral reefs are particularly affected by the high contribution of terrigenous materials through the stream of Wadi El-Gemal. Generally, heavy metals concentration in the sediments decreased with increasing distance from the shoreline with the exception of Pb, which increased with increasing distance from the shoreline. On the other hand, Pb concentration in coral reefs is high compared to that in some sediment samples at Wadi El- Gemal area. The grain size, carbonate, organic matter, phosphorus and heavy metals distribution reflect marked changes in lithology, biological activities in the sea and land geology of the study area. Carbonate content mainly of biogenic origin varies from 5.7 –69.5% of the sediments. Organic matter contents of the sediments (1.7 to 6.5%) and phosphorus content (110 to 5097ppm) usually reflect significant terrigenous influences. On the other hand, heavy metals show an increasing tendency in the mud fraction of Wadi El-Gemal area. The present work reflects how much the marine sediments and coral reefs are influenced by natural impacts from this wadi. The collected data will be useful in management and suitable development of the area, beside being helpful as database in the future.
    Description: NIOF
    Description: Published
    Keywords: Hard corals ; Wadi El-Gemal ; Natural impacts ; Heavy metals ; Environment ; Marine ecology ; Environments ; Marine ecology ; Marine pollution ; Sediments ; Coral reefs
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 2
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    Physico-chemical characteristics of abu za'baal ponds, Egypt (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: NIOF, Alexandria, Egypt
    Description: The present study deals with the physical and chemical characteristics of the water of Abu Za'baal Ponds. Determination of physical parameters (air and water temperatures, transparency, electrical conductivity, salinity, total solids, total dissolved solids and total suspended solids) and chemical parameters (pH, DO, BOD, COD, HCO3 -, CO3 --, Cl- , SO4 --,Ca2+, Mg2+, Na+, K+, NO2-, NO3-, NH3, PO4--, TP and SiO2-) were carried out to identify the nature and quality of the water of Abu Za'baal Ponds. The present results reveal that the values of most physical and chemical parameters were higher than those of freshwater, lower than those of saline water and in the same range of the brackishwater. Thus, the water of Abu Za'baal Ponds can be classified as brackishwater.
    Description: National Institute of Oceanography and Fisheries- Alexandria, Egypt
    Description: Published
    Keywords: Abu Za'baal Ponds ; Chemical composition ; Coastal waters ; Environmental conditions ; Chemical analysis ; Chemical composition ; Coastal waters ; Environmental conditions ; Environmental effects
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 3
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    Polycyclic aromatic hydrocarbons and aromatic plasticiser materials in the sea water of alexandria coastal area (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by NIOF, Alexandria, Egypt
    Description: Polycyclic aromatic hydrocarbons (PAHs), the real contaminants of petroleum, were detected in the surface seawater of Alexandria coastal area in winter and spring seasons of 1995. Their order of predominance, particularly for the individual components were principally due to the processes of input, transport and fluxes. Variation of PAHs was not following seasonal changes but it was slightly affected by partial dissolution of the lowerboiling aromatic hydrocarbons. The most abundant component of aromatic hydrocarbons was pyrene (PAH),112ngI-1 followed by naphthalene(56ngI-1) and its alkylated derivatives (dicyclic), then phenanthrene(14ngI-1) and its methylated derivatives (tricyclic). The potential fish carcinogenic PAH, dibenz [a & c] anthracene was found in extremely trace levels. Most aromatic hydrocarbons present in seawater were arised from combustion of various petroleum and non-petroleum products, while few aromatics were found as a result of petroleum pollution. PAHs were also detected in rain water(25ngI-1). Plasticiser mate rials (phthalates) were determined everywhere at considerable levels in the coastal area of Alexandria; which is the first district in Egypt for producing and recycling polyethylene, plastics and nylons.
    Description: NIOF
    Description: Published
    Description: Polycyclic aromatic hydrocarbons, Sources, Seasonal changes, Natural variation, Plasticizer materials, Rain water
    Keywords: Marine environment ; Environment ; Chemical analysis ; Environments ; Marine environment ; Marine pollution ; Oil pollution
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 4
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    Heavy minerals in the Nigeria river sediments. (2008)
    Nigerian Institute for Oceanography and Marine Research | Lagos, Nigeria
    Details
    Publication Date: 2021-05-19
    Description: Analysis of 450 sediment samples from various rivers in Nigeria have resulted in the identification of seven major drainage systems some of which may be potential sources of heavy mineral contribution to the continental shelf. The seven major drainage systems are: (1)Niger/Benue drainage system with coarse to medium size sediments and a high of 90% opaque mineral concentration in many cases. Some gem heavy minerals like garnet and zircon are also recorded. (2)Gombi drainage system: consists of medium to coarse sand. Opaque mineral concentrations are also high. Up to 90.59% at station BO.99.3. (3)Bauchi Plateau drainage system: Sediments from this drainage system are very coarse and highly angular. This drainage system records the highest overall opaque mineral concentration. 46.00% to 92.51%. This area also records the occurrence of zircon 8.0% in some stations. (4)Sokoto drainage system: Sediments from this drainage system again range from medium to coarse sand, which are moderately well sorted, and largely leptokurtic to platykurtic. Opaque minerals range between 27.66% to a high of 86.66%. The ultrastable minerals zircon, rutile and tourmaline are also found to be present in many of the samples from this drainage system. (5)Kabba-Kaima (Kwara) drainage system: Sediments from this area are generally well sorted medium sand which are rather low in opaque minerals with many stations having less than 300 heavy mineral grains per slide. However, zircon, rutile and tourmaline record appreciable concentrations of 13.33% in some stations. (6)Adamawa drainage system: This drainage system consists of coarse sand, which are mainly very well sorted, and strongly to
    Description: NIOMR, LAGOS
    Description: Published
    Keywords: Marine ecology ; Marine ecology ; Marine pollution
    Repository Name: AquaDocs
    Type: Report
    Format: 51pp.
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  • 5
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    Distribution and relationships of heavy metals in the giant clam (Tridacna maxima) and associated sediments from different sites in the Egyptian Red Sea Coast (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by National Institute of Oceanography and Fisheries, Alexandria, Egypt
    Description: The giant clam (Tridacna maxima) and sediments have been collected from clean and contaminated coastal sites of the Egyptian Red Sea. Selected samples of the giant clam shells and the associated surface sediments were analyzed for Fe, Mn, Zn, Cu, Pb, Ni and Cd. Significant spatial differences in metal concentrations in Tridacna maxima and sediments were identified. Copper and lead are greatly enriched in the giant clam shells, which is related to their physiological function. Cd content is higher in Tridacna maxima than in sediments, because of the easy substitution between Cd and Ca. The levels of most metals in the giant clam shells and sediments were higher in the anthropogenic sites than in the uncontaminated sites. Generally, metal variations reflect natural conditions and human activity. Moreover, there are no clear relationships between concentrations of heavy metals in the giant clam shells and those in sediments.
    Description: NIOF, Alexandria, Egypt
    Description: Published
    Keywords: Bioaccumulation ; Heavy metals ; Giant clam ; Tridacna ; Red Sea ; Absorption ; Accumulation ; Chemical analysis ; Clam culture
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 6
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    A review of the pollution of coastal waters in Nigeria. (2008)
    Nigerian Institute for Oceanography and Marine Research | Lagos, Nigeria
    Details
    Publication Date: 2021-05-19
    Description: The coastal waters in Nigeria are described in relation to the general morphology, vegetation and beach Type along the 850km coastal. The environmental sensitivity of the fragile Niger delta ecosystem is expressed by the numerous estuaries, rivers, creeks, lacustrine and inshore waters which support freshwater and brackish water mangrove swamps. Ocean resources exploited from the Niger delta and adjacent Continental platform include oil, gas and fishes. The general hydrograph and superfial circulation are described against the background of human activities in coastal settlements and developmental pressures for resource utilisation giving rise to water pollution. Micropollutants identified and measured so far include organic waste, trace heavy metals and chlorinated hydrocarbons. Although there is dearth of data for most coastal areas, there is a good basis for further monitoring by continuous standardized Measurements and observations to obtain reliable scientific data for management policies and regulatory framework for the protection of the coaster waters.
    Description: NIOMR, LAGOS
    Description: Published
    Keywords: Marine pollution
    Repository Name: AquaDocs
    Type: Report
    Format: 20pp.
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  • 7
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    Ecological and fisheries development of Lake Manzalah (Egypt): hydrography and chemistry of Lake Manzalah (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by the NIOF, Egypt
    Description: Lake Manzalah; the largest delta Lake in Egypt represents a dynamic system that has been undergoing continuous and pronounced changes since long times. In the last year’s this Lake faced drastic problems that retarded its environmental and fisheries development; the most serious one is the discharge of waste water. It is attempted in the present study to investigate the chemical characters of Lake Manzalah water during 2001-2002. Water temperature ranged from an average of 12.35oC in January and 29.14oC in July. Dissolved Oxygen, pH and total dissolved solids were found in ranges optimum for the living of marine and freshwater fish species. The average concentrations of nutrients lied in the following ranges: 1.24 to 4.89 μmol PO4 -3 l-1 , 5.08 to 28.73 μmol SiO4 -2 l-1 and 1.81 to 17.7 μ_mol NO3-1 l-1 The concentrations of phosphorus and nitrogen compounds were found to be relatively higher at the southern regions of the Lake near to the outlets of the drains.
    Description: NIOF
    Description: Published
    Keywords: Hydrography ; Water ; Chemistry ; Chemical composition ; Water content ; Environment ; Chemical composition ; Environments ; Water content ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 8
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    Review of the state of pollution of the Lagos lagoon. (2008)
    Nigerian Institute for Oceanography and Marine Research | Lagos, Nigeria
    Details
    Publication Date: 2021-05-19
    Description: Guinea coast. It is a shallow expanse of water with restricted circulation in a micro-tidal environment. This aquatic resource of multiple usages receives inputs of domestic The Lagos Lagoon is the largest of the four lagoon systems of the Gulf of hydrocarbon cooling water from a thermal power station and emissions from automobile exhaust. Micro-pollutants examined in the water, sediment and biota have included organic waste, trace heavy metals and chlorinated hydrocarbons. Concentrations detected have identified â hot spotsâ and relatively unpolluted areas for the different contaminants in the lagoon. The results show marked variations and non-uniform distribution from one season to another. It has been difficult to differentiate pollution effects from natural variations in the general milieu of contaminated water. A monitoring program is recommended as a measure to restore the water quality following compliance with management policies and regulatory framework introduced for the protection of the coastal water.
    Description: NIOMR, Lagos
    Description: Published
    Keywords: Lagoons ; Marine pollution ; Lagoons
    Repository Name: AquaDocs
    Type: Report
    Format: 19pp.
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