Evaluation of Heavy Metal Pollution in the Skeleton and Edible Muscle of Mollusks (Cephalopods and Bivalves) from Red Sea- Saudi Arabia
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8th International Scientific Conference on Applied Sciences and Engineering 2-3 April, 2016 Hotel Istana Kuala Lumpur City Centre, Kuala Lumpur, Malaysia
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The oceans are enormous in their size, volume and depth.
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Sculpture and 3D assemblage involve creating three-dimensional artwork using various materials and techniques. Sculpture has been an important part of religious and political expression throughout history in many cultures. Notable sculptors mentioned include Napoleon Abueva, Arturo Luz, Guillermo Tolentino, and Abdulmari Asia Imao, known for their sculptures highlighting Filipino culture and history. 3D assemblage involves combining found objects into artistic compositions and originated in the early 20th century works of artists like Picasso, Duchamp, and Rauschenberg.
BLACK SEA POLLUTION AND THE PROTECTION AGAINST THIS POLLUTION
This document discusses pollution in the Black Sea and efforts to protect it. It identifies three main causes of pollution: toxic substances from industrial and agricultural runoff, radioactive pollution from incidents like Chernobyl, and chemical pollution from oil spills and other industrial sources. This pollution has negatively impacted the Black Sea ecosystem and economies of surrounding countries by threatening fisheries, tourism, and human health. Several international agreements have aimed to reduce pollution and protect the Black Sea, including conventions signed in 1994 and 1996. Turkey, as the country with the largest coastline on the Black Sea, strongly supports these agreements and protection efforts.
SCULPTURE: ADDITIVE,SUBTRACTIVE AND KINETIC
Sculpture is a three-dimensional art form created by shaping hard materials like stone, metal, glass, or wood. There are three main types of sculpture: subtractive, which involves removing material like in carving; additive, which is most common today and involves adding material; and kinetic, containing moving parts. Sculpture is created through four basic processes - carving, modeling, casting, and construction - and can also involve assemblage, relief, or kinetic elements.
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Similar to Evaluation of Heavy Metal Pollution in the Skeleton and Edible Muscle of Mollusks (Cephalopods and Bivalves) from Red Sea- Saudi Arabia
A pilot study on effect of copper and cadmium toxicity in Tilapia Mossambicus
Cu and Cd is trace element for most organisms including fish, but above certain limit Cu and Cd will be toxic. The present study was conducted to evaluate the toxic effect of Cu and Cd on Tilapia mossambicus via estimating the acute 96h median lethal concentration (LC50) value. A total 120 number of Tilapia mossambicus fingerlings were subjected to 12 numbers 20-L aquaria. Fish were exposed to 0.0, 2.0, 4.0, 6.0, 8.0 and 10.0mg Cu and Cd/L for 4 days. Each dose was represented by two aquaria. Fish was daily observed and dead fish were removed immediately. The data obtained were evaluated using Behrens-Karber’s Method. The 96 h LC50 value of Cu for Tilapia mossambicus was calculated to be 6.0mg Cu/L with Behrens-Karber’s Method. The 96 h LC50 value of Cd for Tilapia mossambicus was calculated to be 4.8mg Cd/L with Behrens-Karber’s Method. The behavioral changes of Tilapia mossambicus were primarily observed. It could be concluded that Tilapia mossambicus species slightly sensitive to Cu and Cd when compare both metal cadmium is more toxic than copper for the fish species.
Article Citation:
Anushia C, Sampath kumar P and Selva Prabhu A.
A Pilot Study on Effect of Copper and Cadmium Toxicity in Tilapia Mossambicus.
Journal of Research in Animal Sciences (2012) 1(1): 020-027.
Full Text:
http://janimalsciences.com/documents/AS0008.pdf
A Pilot Study on Effect of Copper and Cadmium Toxicity in Tilapia Mossambicus
A Pilot Study on Effect of Copper and Cadmium Toxicity in Tilapia Mossambicus researchanimalsciences
Cu and Cd is trace element for most organisms including fish, but above certain limit Cu and Cd will be toxic. The present study was conducted to evaluate the
toxic effect of Cu and Cd on Tilapia mossambicus
via estimating the acute 96h median lethal concentration (LC 50 ) value. A total 120 number of
Tilapia mossambicus fingerlings were subjected to 12 numbers 20 L aquaria. Fish were exposed to 0.0, 2.0,
4.0, 6.0, 8.0 and 10.0mg Cu and Cd/L for 4 days. Each dose was represented by two aquaria. Fish was daily observed and dead fish were removed immediately. The data obtained were evaluated using Behrens - Karber’s Method. The 96 h LC 50 value of Cu for Tilapia mossambicus was calculated to be 6.0mg Cu/L with Behrens - Karber’s Method. The 96 h LC
50 value of Cd for Tilapia mossambicus was calculated to be 4.8mg Cd/L with Behrens - Karber’s Method. The behavioral changs of Tilapia mossambicus
were primarily observed. It could be concluded that Tilapia mossambicus species slightly sensitive to Cu and Cd when compare both metal
cadmium is more toxic than copper for the fish species.Phyto-remediation NIB
The document analyzes the potential of three aquatic plant species - water hyacinth, water lettuce, and coontail - to remediate industrial effluent contaminated with heavy metals. The effluent was collected from a fuse shop in Pakistan that processes ammunition parts. Testing found the plants significantly reduced metal concentrations of copper, chromium, cadmium, zinc, nickel, and lead in the effluent over 24 days. Coontail was the most effective at removing metals. The results suggest these native plants could help manage and decontaminate wastewater polluted with heavy metals.
Research proposal
This study aims to analyze the bioaccumulation of iron, cobalt, nickel, and copper in goldfish and determine their toxic effects. Laboratory testing will be conducted to measure metal content in goldfish tissues. The stress responses and toxicity levels caused by metal nanoparticles will be assessed through statistical analysis of histopathological changes and behavior alterations in goldfish. The risk posed to aquatic species, environments, and ecosystems by the presence of these metals will also be estimated. Quantitative surveys of experts and secondary data from past studies will be used to analyze bioaccumulation and toxicity effects on goldfish in the selected study area.
Study of Biocidal Activity of Copper A Review
Copper ions, either alone or in copper complexes, have been used to disinfect liquids, solids and human tissue for centuries. Today copper is used as a water purifier, algaecide, fungicide, nematocide, molluscicide as well as an anti bacterial and anti fouling agent. Copper also displays potent anti viral activity. We have explained i the biocidal properties of copper ii the possible mechanisms by which copper is toxic to microorganisms and iii the systems by which many microorganisms resist high concentrations of heavy metals, with an emphasis on copper. Health care associated infections HAIs are a global problem associated with significant morbidity and mortality. Controlling the spread of antimicrobial resistant bacteria is a major public health challenge, and antimicrobial resistance has become one of the most important global problems in current times. The antimicrobial effect of copper has been known for centuries, and ongoing research is being conducted on the use of copper coated hard and soft surfaces for reduction of microbial contamination and, subsequently, reduction of HAIs. Dr. Pragya Tank "Study of Biocidal Activity of Copper: A Review" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-5 , August 2022, URL: https://www.ijtsrd.com/papers/ijtsrd50696.pdf Paper URL: https://www.ijtsrd.com/chemistry/other/50696/study-of-biocidal-activity-of-copper-a-review/dr-pragya-tank
Combined effects of copper and cadmium on Chlorella pyrenoidosa H.Chick: Subc...
Combined effects of copper and cadmium on Chlorella pyrenoidosa H.Chick: Subc...UniversitasGadjahMada
Disposal of waste into aquatic ecosystems may cause microalgae to be exposed to various metals, e.g. copper and cadmium. The effects caused by combinations of metals may be more serious. Evaluations of subcellular fate, bioaccumulation, and biological effects of metals on aquatic organisms are generally derived from experiments with individual metals. The present study aims to evaluate the effects of exposure of Chlorella pyrenoidosa to copper and cadmium combined on subcellular accumulation, distribution, and growth. The algae were exposed for 72 h to copper at concentrations of 13 – 25 μmol L-1, cadmium at about 6 μmol L-1, and combinations thereof. The levels of copper and cadmium in subcellular organelles, heatdenaturated protein, metal-rich granules, and heat-stable protein were determined by atomic absorption spectrometry. Exposure of C. pyrenoidosa to copper and cadmium in combination inhibited growth more strongly than copper and cadmium individually. Highest accumulation was observed in metal-rich granules and heat-stable proteins. Administration of both metals in combination affected their subcellular distribution: copper was mainly distributed into the metal-rich granules (70 - 80 %) and heat-stable proteins (9 - 24 %), cadmium in the metal-rich granules (88 - 98 %).Heavy Metal Concentrations in Feathers of Critically Endangered Long-Billed V...
Heavy Metal Concentrations in Feathers of Critically Endangered Long-Billed V...SSR Institute of International Journal of Life Sciences
DOI:10.21276/ijlssr.2016.2.4.9
and so pollutant burdens recorded in soft body tissue, bones, feathers and eggs are likely to reflect chemical contamination
within their extended home ranges. These local, upper trophic level species are believed to be especially vulnerable to
metals and play a very important role as environmental contamination indicators. The concentration of Lead (Pb),
Cadmium (Cd), Copper (Cu), Zinc (Zn) and Iron (Fe) were determined in feather samples of Long-billed vultures (Gyps
indicus) (n = 100) collected from Tikamgarh, Lalitpur, Shivpuri, Chanderi and Panna Districts of Bundelkhand Region
during 2007-2011. Sample preparation and analyses of metals were performed in the Indian Veterinary Research Institute,
Izatnagar, Bareilly. Metal level in the samples was analyzed by Atomic Absorption Spectrophotometer (AAS 4141,
ECIL, Hyderabad, India) wavelength of 229.5 nm (detection limit 0.005 μg/mL) and 217 nm (detection limit 0.025
μg/mL), respectively with 6mA current. The concentration of Cd, Pb, Cu, Zn and Fe determined in all the feathers
collected from five sites was within the range of 0.1μg/g-0.4 μg/g, 0.47μg/g-6.4 μg/g, 2.9μg/g- 8.11μg/g, 9 μg/g- 21.4
μg/g and 18.3μg/g- 194.9μg/g respectively According to ANOVA test, significant differences (0.05) were found for metals
(Pb, Cd, Cu, Zn and Fe) in all feathers from Tikamgarh, Lalitpur, Shivpuri, Chanderi and Panna. When the metal toxicity
results in feathers were seen district wise (Tikamgarh, Lalitpur, Shivpuri, Chanderi and Panna) no significant variance
were reported in the occurrence of metals. No significant relationships were found between the metals in feather sample
concentrations and their death. It can therefore be concluded that the metal concentrations are much below the lethal toxic
levels and had no affect on the health of the dead vultures. The results of this study allowed concluding that the
Long-billed vultures in the study area were not exposed to metal poisoning. The absence of linkage between the metal
toxicity and vulture mortalities is not unexpected when consulted with other previous studies. Key-words- Long-billed vultures, Feathers, Lead, Cadmium, Copper, Zinc, IronHeavy metal Accumulation
This document discusses studies conducted in 2012 and 2013 on the fish Malapterurus electricus and its intestinal parasites as biomonitors of heavy metal concentrations in Lekki Lagoon, Nigeria. The studies found certain parasites like acanthocephalans and cestodes accumulated heavy metals at much higher concentrations than their host fish tissues or the environment. The 2012 study found metal concentrations in infected fish livers and their parasites exceeded WHO limits. The 2013 study also found some infected fish accumulated more metals than uninfected fish, though their parasite species had low bioaccumulation potential. There is a need for further research on host-parasite relationships and metal accumulation using molecular techniques to better understand how parasites may influence metal levels in their fish
Health risk assessment of consuming heavy metal contaminated benthic seafood,...
This study evaluated health risks associated with the consumption of a seafood (bivalve - Anadara (Senilia) senilis) contaminated with some heavy metals in southern Nigeria. Atomic absorption spectrophotometry was used for metal analysis. Mean metal concentrations (µgg-1) was in the order of Zn(12.96±1.0)> Pb(4.69±0.6)> Cr(2.91±0.7)> Ni(2.47±0.2)> Cu(2.03±0.3)> Cd(1.68±0.2). Mean concentrations of Cr, Cu and Zn were below their respective FAO/WHO recommended limits while those of Ni, Cd and Pb exceeded. The Estimated daily intake-EDI values of all metals were less than their respective reference oral doses-RFD implying minimal health risk. The target hazard quotient (non-carcinogenic) and hazard index-HI had values <1suggesting minimal health risk of non-carcinogenic origin but HI value showed potency of increase. The value of Incremental Lifetime Cancer Risk-ILCR ranged from 10-5-10-2 with Ni and Cd within the acceptable range of 10-4-10-6 while Cr and Pb exceeded the limit. The target cancer risk-TR had values of 10-3 indicating moderate to high risk according to the New York State Department of Health classification. The study concluded the presence of moderate to high carcinogenic risk due to Cr and Pb for consumers of heavy metal contaminated seafood (bivalves) in southern Nigeria. Minimal consumption and further action are advised with regular monitoring to detect changes.
Environmental earth sciences volume 72 issue 1 2014 [doi 10.1007 s12665 013-2...
1. The study analyzed levels of heavy metals like copper, lead, zinc, and cadmium in water, sediment, and tissues of milkfish (Chanos chanos) collected from Kaattuppalli Island and a reference site near Kovalam coast in India.
2. Heavy metal concentrations were highest in sediment, water, and fish tissues from Kaattuppalli Island, which receives untreated industrial waste.
3. Histological examination found lipid accumulation in the liver and increased mucous cells in the gills of fish from Kaattuppalli Island, indicating effects of heavy metal contamination.
Leal et al 2016a
This study examined the effects of chronic copper exposure on the development of meiospores in the native kelp species Macrocystis pyrifera and the invasive kelp species Undaria pinnatifida. Meiospores of both species were exposed to various concentrations of copper (0-400 μg/L nominal) for 9 days. While meiospore germination occurred in all copper treatments, gametophyte growth and sexual differentiation were arrested under all copper exposures. The effective copper concentration that caused 50% inhibition of germination was higher for U. pinnatifida (231 μg/L) than M. pyrifera (157 μg/L), however neither species showed a
IJSRED-V2I3P60
Heavy metals from industrial waste are contaminating the aquatic systems and fish in West Bengal, India. A study analyzed levels of heavy metals like lead, chromium, nickel, and cadmium in tissues of three fish species from different areas. The highest metal levels were found in the intestine and liver of fish, with lead levels surpassing WHO, EPA, and Indian safety standards. The contamination of heavy metals poses risks to the local fish biodiversity and human health through the food chain.
Determination of some heavy metals possibly present in drinking stations foun...
This study analyzed water samples from drinking stations in various colleges at a university in Manila, Philippines to test for heavy metals. Water samples were collected from 7 locations on campus, including colleges of medicine, nursing, dentistry, pharmacy, and arts and sciences. The samples underwent acid digestion and were tested qualitatively for various heavy metals. They were also tested quantitatively for lead and cadmium using atomic absorption spectroscopy. The study found lead and cadmium concentrations in some samples exceeded EPA standards for safe drinking water. The presence of these toxic heavy metals poses a risk to students and others who consume water from the drinking stations on campus.
CV, Ali
This document provides biographical information on Associate Professor Ali Dadolahi-Sohrab, including his education, memberships, addresses, research interests, techniques and skills, and publications. He received his PhD in Ecotoxicology from University Putra Malaysia in 2003. His research focuses on ecotoxicology in various environments, including heavy metals and oil pollution in organisms. He has published over 20 papers and presented at several conferences on topics related to heavy metals in seaweeds, sediments, and aquatic organisms in the Persian Gulf region.
In-Vitro Evaluation of Heavy Metal Tolerance and Biosorptive Potential of Two...
Heavy metal contamination now a day is one of the major global
environmental concerns and industrial effluent is commonly used
for irrigation. Increasing industrial rate in the modern world is responsible for increase in concentration of heavy metals. Present
study was designed to isolate and identify some indigenous heavy
metal tolerant bacteria from textile effluents.
In-Vitro Evaluation of Heavy Metal Tolerance and Biosorptive Potential of Two...
Heavy metal contamination now a day is one of the major global
environmental concerns and industrial effluent is commonly used
for irrigation. Increasing industrial rate in the modern world is responsible for increase in concentration of heavy metals. Present
study was designed to isolate and identify some indigenous heavy
metal tolerant bacteria from textile effluents.
Assessment of Cadmium, Lead and Nickel Removal Capacity of Lactic Acid Bacter...
Assessment of Cadmium, Lead and Nickel Removal Capacity of Lactic Acid Bacter...Iranian Food Science and Technology Research Journal
Introduction
The food and water contamination with heavy metals is increasing due to the environmental pollutions. Heavy metals are the elements with the density of more than 5 g/cm3 and have become a serious problem as a result of the urbanization and industrialization. These toxic metals pollute water, soil, plants, and eventually foodstuffs and our bodies. Several methods exist to remediate heavy metal pollution in waters such as membrane filtration, ion exchange mechanisms, or by precipitation. Yet, these techniques are not cost effective, in some cases, and do produce wastes that need to be properly disposed of. Microbial bioremediation could be an alternative. The use of microbes for remediation of heavy metals has been well studied. Some microorganisms, especially soil bacteria, have the ability to tolerate these contaminants. In addition, certain bacterial strains are capable of binding to heavy metals or transforming them into less toxic forms. Low operating costs, usable in foodstuffs, selective removal for specific toxic metals, minimal use of chemicals (resulting in low sludge production) and high efficiencies at very low levels of heavy metals are some of the advantages of biosorption methods. In this regard, the purpose of this study was to investigate the ability of active and passive absorption of heavy metals by a number of Lactic Acid Bacteria (LAB) strains in laboratory environment and food.
Materials and Methods
Seven LAB isolates including Lacticaseibacillus casei (RTCC 1296-3), Lacticaseibacillus rhamnosus (RTCC 1293-2), Lactiplantibacillus plantarum (RTCC 1290), Limosilactobacillus fermentum (RTCC 1303), Enterococcus faecium (RTCC 2347), Lactobacillus helveticus (RTCC 1304) and Lactobacillus acidophilus (RTCC 1299) were obtained from Razi type culture collection (RTCC), located at Razi vaccine and Serum Research Institute, Iran. All isolates were cultured in MRS (Scharlau, Spain) broth medium, at 37 °C for 24 hours, under anaerobic conditions. Pure cultures were preserved for long term by freezing at -70°C with 20% Glycerol. Heavy metals including Nitrate of Pb (II), Cd (II) and Ni (II) were purchased from Merck (Darmstadt, Germany). All standard solutions were prepared from the stock solutions containing 1000 mgl-1 in distilled water. Other chemicals used in study including Nitric acid (65%) and Hydrogen peroxide (37%), were also purchased from Merck, Germany. This study was conducted in two in- vitro and in-vivo phases; in the in- vitro phase, seven strains of bacteria with probiotic properties (L. casei, L. rhamnosus, L. plantarum, L. fermentum, Ent. facium, L. helveticus and L. acidofilous) were screened and then their ability to bind to cadmium (Cd), Lead (Pb) and nickel (Ni) in aqueous solution was investigated. Then, in the in-vivo stage, three probiotic strains that had the highest biosorption efficiency in the previously stage were selected and their effect with a ratio of 1:1:1 and contact time of 15 and 30 minENPO5562
This document summarizes a study that used portable X-ray fluorescence spectrometry (XRF) to rapidly detect toxic metals like lead in non-crushed oyster shells. The researchers developed a methodology to use a portable XRF to simultaneously detect multiple elements in oyster shells without crushing them. Lead contamination was confirmed in contaminated oyster shells using both XRF and scanning electron microscopy with energy dispersive spectroscopy (SEMeEDS). The portable XRF provided a quick, non-destructive, and cost-effective way to assess lead contamination in oyster shells.
Biosorption of metals by Solitary Ascidian, Phallusia Nigra in Vizhinjam Ba...
Biosorption of metals by Solitary Ascidian, Phallusia Nigra in Vizhinjam Ba...researchanimalsciences
Biosorption of heavy metals by ascidians has been recognized as a potential
alternative to existing technique for recovery of heavy metals from waste stream. The
solitary ascidian,
Phallusia nigra,
is a common and large black ascidian and occurs
throughout the year in Vizhinjam Bay. Hence this study has been focused on the
biosorption of metals in the test and mantle body of
P. nigra
from ecologically
significant station, Vizhinjam Bay. Monthly samplings of water and specimens of
P. nigra were done during the period from September 2010 to August 2011 and
subjected to the analysis of metals. The concentration of metals in water were found
in the following order Cd>Pb>V>Hg. Mean concentrations of metals were high during
monsoon season and low during premonsoon season.
Absorption of metals by
P. nigra
revealed that both test and mantle body
accumulated a diverse range of trace metals. The present results showed that the
content of metals in the test was usually less than that of the mantle body. High
concentration of these metals was found to be during monsoon season whereas low
concentration was during premonsoon season.
The bioaccumulation factors were in the order of V>Pb>Cd> Hg for the test
and mantle body of the study animal. Application of one
–
way ANOVA for the
concentration of these metals between test and mantle body showed significant
differences. Metal concentrations recorded in this ascidian could effectively be used
as good reference material for monitoring metal contamination in Indian sea waters.Bioindicators in Heavy Metal Detection
This document summarizes bioindicators that can be used to detect various heavy metals in the environment. It discusses 11 heavy metals (copper, mercury, cadmium, etc.) and provides examples of bioindicators for each metal from different kingdoms, including plants, fungi, animals and others. For copper, examples given include mango plants, giant kelp, and arthropods like spiders. For mercury, moss, waterbirds, fish and earthworms are mentioned. For cadmium, bivalves, alfalfa plants, sea urchins and flying foxes are listed. The document concludes that living organisms that accumulate heavy metals in their tissues can serve as effective bioindicators for detecting
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A pilot study on effect of copper and cadmium toxicity in Tilapia Mossambicus
A pilot study on effect of copper and cadmium toxicity in Tilapia Mossambicus
A Pilot Study on Effect of Copper and Cadmium Toxicity in Tilapia Mossambicus
A Pilot Study on Effect of Copper and Cadmium Toxicity in Tilapia Mossambicus
Combined effects of copper and cadmium on Chlorella pyrenoidosa H.Chick: Subc...
Combined effects of copper and cadmium on Chlorella pyrenoidosa H.Chick: Subc...
Heavy Metal Concentrations in Feathers of Critically Endangered Long-Billed V...
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Health risk assessment of consuming heavy metal contaminated benthic seafood,...
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Environmental earth sciences volume 72 issue 1 2014 [doi 10.1007 s12665 013-2...
Environmental earth sciences volume 72 issue 1 2014 [doi 10.1007 s12665 013-2...
Determination of some heavy metals possibly present in drinking stations foun...
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In-Vitro Evaluation of Heavy Metal Tolerance and Biosorptive Potential of Two...
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Assessment of Cadmium, Lead and Nickel Removal Capacity of Lactic Acid Bacter...
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Biosorption of metals by Solitary Ascidian, Phallusia Nigra in Vizhinjam Ba...
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Two Dimensional Device Modeling and Analysis of Metal–Germanium–Metal PhotodiodeConferenceproceedings
9th International Scientific Conference on Applied
Sciences and Engineering
6-7 June 2016
Nippon Hotel, İstanbul-TurkeyImpact of Climate Change on Agriculture in Semi-Arid Region of Algeria
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Effect of Fagonia Cretica Linn Ethanolic Extract on Different Hematological P...
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Nippon Hotel, İstanbul-TurkeyAirborne Particulates Assessment in KL Sentral, Malaysia: Symptoms Associated...
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Nippon Hotel, İstanbul-TurkeyA Scientific Conception of Welfare and Housing in Dairy Farming
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- 1. Abstract of Applied Sciences and Engineering, 2016, Vol.8 ISSN: 2415-2072 DOI: 10.18488/journal.1001/2016.8/1001.8 8th International Scientific Conference on Applied Sciences and Engineering 2-3 April, 2016 Hotel Istana Kuala Lumpur City Centre, Kuala Lumpur, Malaysia Conference Website: www.scihost.org 11 Paper ID: 24/16/ 8 th ISCASE Evaluation of Heavy Metal Pollution in the Skeleton and Edible Muscle of Mollusks (Cephalopods and Bivalves) from Red Sea- Saudi Arabia Hala Ali Abdel-Salam1 --- El Benasy, Kamal Shaker2 1 Cairo University, Faculty of Science, Egypt 2 Majmaah University, Faculty of Applied Medical Science , Saudi Arabia Abstract This study was conducted to estimate and compare the bioaccumulative capacity of the skeleton and edible muscles of two important commercially mollusks species (Sepia spp and Cardium edule) for essential heavy metals (Fe, Cu, Zn, and Co) and non- essential heavy metals ( Hg, Pb and Cd). It was carried out also to evaluate the bioaccumulation process of the elements based on the Metal Pollution Index (MPI) as an attempt to use these mollusk organisms as bioindicators of pollution of Red Sea and to ensure the safety of these organisms for human consumption. The present study show that the skeleton of Sepia spp and C. edule accumulated higher percentages of the determined metals than their edible muscles. This result suggests that the skeleton of cephalopod and bivalve mollusks can be used as indicator of water pollution and this suggest their tendency to detoxification mechanism of heavy metals as a mean of protection. The present data also, show that MPI factor of essential metals were higher than that of non-essential heavy metals in all studied organisms. Moreover, MPI values suggested that bivalve mollusks have a greater capacity for metal bioaccumulation than cephalopod mollusks. So, therefore, bivalve mollusks are more vulnerable to metal pollution and it is suggested that C. edule can be used as bioindicator of metal pollution Keywords: Mollusks, Edible muscles, Skeleton, Heavy metals, Bioaccumulation, Metal pollution index. Presenter Information Name: Hala Ali Abd El- Salam Affiliation: Cairo University, Faculty of Science, Egypt