Normally, human body requires some of the heavy metals such as copper, iron, nickel and zinc. Assessment of heavy metals in water, fish and sediments from. Cu had the highest accumulating level in fish whilst hg had the lowest. Analysis of heavy metals in water, sediments and fish samples.
Levels of bioaccumulation of some heavy metals in fish tilapia zilli and their concentration in water and sediment of owubu creek, niger delta, nigeria upadhi friday, wokoma o. Heavy metals and pcbs in dolphins, sediment and fish. Muley department of zoology, shivaji university, kolhapur pin 416004 maharashtra, india corresponding author abstract introduction in last few decades increase in population density, heavy industrialization and agricultural activities have resulted in. Baseline concentration of heavy metals in fish collected. In view of the potential risks to human being through the food chain and the surrounding. Heavy metals contents of some synthetic fish feeds found within makurdi metropolis article pdf available in international journal of food safety nutrition and public health 22. Heavy metals in edible seafood universiti malaysia sarawak. Both metals were found to largely accumulate in the liver.
F zoology department of zoology university of delhi may, 2016 2. The concentrations of the nonessential metals cd and pb were generally lower than those in other metals in the fish analysed. The analysis of the idea of fish destination and status fishing area for heavy metals was determined by the assessment of its risk limits daily intake of metal and health risk index. Heavy metals under study in the edible parts of tilapia were within the safety permissible level for human use. Contaminated food and uptake of heavy metals by fish. International national standards for heavy metals in food. The voracious fish load an appreciable high amount of heavy metal elements, when collate with the heavy metal burden in cannibal fish. Determination of heavy metal levels in fishes from the lower. Bioaccumulation of mercury, cadmium, zinc, chromium, and. The potential of locally occurring fish and crab species as bioindicators of copper. Determination of heavy metals in tilapia using various digestion methods a1pramoda ranasinghe. Therefore, it is important to monitor heavy metals in aquatic environments fish, water and sediment.
Heavy metals in fish come mainly from their diet, and levels of. Bioaccumulation of mercury, cadmium, zinc, chromium, and lead. Heavy metals in fish come mainly from their diet, and levels of bioaccumulation of contaminants are higher in fish which comes higher in food chain 15. Accumulation of heavy metals in fishes of freshwater lakes of india harsimran kaur brar m.
Alweher mutah university department of biological sciences, karak, jordan abstract cd, cu and zn concentrations were determined in muscle. Excessive intake of heavy metals may lead to a decline in mental, cognitive and physical health. Heavy metals, fish, digestion method, wet digestion, dry ashing, aquaregia, atomic absorption. Effect of heavy metals on liver, kidney, gills and muscles. Bioaccumulation of some heavy metals in tilapia fish. Determination of heavy metals in different fish of lake. Accumulation of heavy metals in fishes of freshwater 1 1. Heavy metal toxicity in fish and seafood i dont know about you, but i absolutely love my seafood.
However, the content of toxic heavy metals in fish can counteract the positive effects of the omega3 fatty acids present in fish and their beneficial effects on heart disease risk chan and egeland, 2004. Mercury in the water is converted by microorganisms to methylmercury which is the most dangerous form. In most studied fish, the liver was the target organ for cu, zn and fe accumulation. The transfer factors of all metals in fish from water. The uptake of heavy metals via the alimentary tract can be an important factor for the metal budget of fish. Determination of heavy metal concentrations of most. Eating fish and seafood protects you not only from diseases like heart disease, stroke, diabetes, etc, but from all causes of death, including cancer. I wrote about this problem in my book back in 2004. Iron, manganese and cadmium were found to be the most abundant metals in the fish samples with an average values of 35. Mercury poisoning and heavy metals contamination makes eating fish a highrisk meal. Variations in the accumulation of heavy metals concentrations were between various tissuesorgans skin. The concentrations of heavy metals cu, zn, pb, cd, fe and mn were measured in the liver, gills and muscles of fourteen benthic and pelagic fish species collected from three main landing areas shalateen, hurghada and suez in the egyptian red sea.
Heavy metal toxicity in fish and seafood pink tent. In fish, these elements can cause disturbances in growth and reproduction, as well as histopathological alterations in the skin, gills, liver, spleen, and kidneys vitek et al. As expected, muscles always possessed the lowest concentrations of all metals. The metals may into the fish s body by three possible routes. Introduction freshwater ecosystems are a subset of earths aquatic ecosystems. This study is the first effort for investigating the level of heavy metals in fish species in gaza fishing harbor area. The concentrations of heavy metals al, as, cd, cu, fe, pb and zn in fish at the three different sampling points are given in table 1.
Heavy metal concentrations in ten species of fishes caught. For the normal metabolism of the fish, the essential metals must be taken up from water, food or sediment canl. This study assesses the likely health risks to human contamination of heavy metals from fish consumption. Describe differences of the concentrations of these heavy metals between species, 3. Fish is highly contaminated today, but we need the omega3 in our diets more than we need to avoid fish. The avsar dam lake is located on the west of turkey and it is included in the national water. Small fish are enriched with accumulated heavy metals from the aquatic microfauna and microflora that constitute their diet obasohan et al. Accumulation patterns are more in some fish species than others because of the ability of fish to bioaccumulate metals 14. Pb and mn, however, exhibited their highest concentrations in the gills. Concentrations of some heavy metals pb, cd, hg, cu and cr were determined in water, sediment and tissues of tilapia fish collected from wadi hanifah during summer 2010. Determination of heavy metals in tilapia using various.
Effect of heavy metals on liver and gill of fish cirrhinus. Pdf effect of different heavy metal pollution on fish. Heavy metals in seafood and farm produce from uyo, nigeria. There is a wine industry secret that has gained scant public attention. In most of the fish samples, lead, chromium, cadmium, cobalt and zinc concentration were found to be above the maximum tolerable values provided by faowho 1989. The results obtained from this study would provide. Reports using levels of heavy metals in fish to indicate and assess the contamination of heavy metals in water have been found to be very useful for environmental monitoring rashed, 2001. Fish is an important source of protein and it also provides essential omega3. Fish is one of our most valuable sources of protein food. The metals may into the fishs body by three possible routes. International national standards for heavy metals in food dr yy choi chemist. Worldwide, people obtain about 25% of their animal protein from fish and shellfish. Heavy metals in edible seafood universiti malaysia.
Analysis of heavy metal concentrations in tilapia fish. Accumulation of heavy metals in fishes of freshwater 1. Samples from tasik mutiara, puchong 347 despite the fact that metal biomagnification is influenced by metal assimilation, pollutants can still move through the various trophic levels in an ecosystem 3 and results in higher concentrations of the substance than. Collvin l 1984 uptake of copper in the gills and liver of perch, perca fluviatilis. Bioaccumulation of heavy metals in fishes of hashenge lake. Analysis of heavy metals in water and fish tilapia sp. Length and weight play an important role in the accumulation of heavy metals. In polluted aquatic ecosystems the transfer of metals through food chains can. The concentrations of cd and pb obtained are lower for water and higher for sediments from the work on a water body used for irrigation in keffi. Bioaccumulation of heavy metals in fish from the chi river.
Determine and compare the concentrations of zn, cu, pb and cd, in edible parts dorsal muscle tissue of ten selected common coastal black sea fish species, 2. When i was a little girl and my family would go out to a nice restaurant, my two favorite things to order were shrimp cocktail and a shirley temple a nonalcoholic drink of ginger ale and grenadine. Fish supplies high protein, low total fat, while high in omega3. Levels of bioaccumulation of some heavy metals in fish.
The heavy metals such as lead and cadmium are known as nonessential metals. Concentrations of fe, mn, cu, zn, ni, pb, cd and cr in muscles, liver, kidney, gills and gonads of analyzed fish species, expressed by mean. Sofianazirun1 1institute of biological sciences, 3department of geology, faculty of science university of malaya, kuala lumpur 50603, malaysia 2school of food engineering, biotechnology and agronomy esiaba. Levels of heavy metals, especially mercury, accumulate in fish as they feed. From a toxicological point of view, the chemical form in which the metal is ingested plays a significant role. This led to the conclusion that fish bioaccumulation with these metals was from water. Risk assessment of heavy metals in imported frozen fish. Mining activities in the karstveld, specifically in the tsumebgrootfonteinotavi area, may potentially result in heavy. Fish is an important source of protein and it also provides essential omega3 fatty acids docosahexaenoic and.
Stancheva et al determination of heavy metal concentrations of most consumed fish species 198 reported literature data and with the data from the international organizations. Fish, apart of being a good source of digestible protein vitamins, minerals and polyunsaturated fatty acids pufa, are also an important source of heavy metals. The concentrations of the heavy metal in water were within the international permissible level. Fish living in polluted waters tend to accumulate heavy metals in their tissues. Analysis of heavy metals in water, sediments and fish. They are toxic even in small amounts and harmful to human health. We investigated the concentrations of mercury hg, cadmium cd, zinc zn, chromium. Bioaccumulation of heavy metals in fish tilapia zilli and. Accumulation of heavy metals fe, mn, cu, zn, ni, pb, cd. Studies on the different parts of the fish revealed higher concentrations of heavy metals on the bones than flesh parts of both the nile tilapia and common carp fishes. Assessment of heavy metals in water, fish and sediments. Determining the health risks of consuming seafood and farm produce from uyo, nigeria, is of the utmost importance to public health since the results of this study indicate that these foods likely add to the body burden of heavy metals among individuals residing in this region. S school of engineering,hosur road, near electronic city, bangalore100,india. Determination of heavy metals in different fish of lake abaya.
Analysis of heavy metals in water and fish tilapia. The levels of heavy metals varied significantly among fish species and organs. Accumulation of heavy metals fe, mn, cu, zn, ni, pb, cd and. The highest total lead content was found in sprat sprattus sprattus, 0. Bioaccumulations of heavy metals in fish depend on several factors such as increased levels of industrial pollution and. In addition, some metals may decrease the plasticity of the cardiorespiratory responses, reducing the survival chances of fish under hypoxic conditions. These essential metals can also produce toxic effects when the metal intake is excessively. The increasing importance of fish as a source of protein and the interest in understanding the accumulation of heavy metals at the trophic levels of food chain, extend the focus towards fish.
Seafood is a healthy source of iodine, essential fats and easily digested protein and is often considered a healthy addition to any diet. Abida begum 1, harikrishna s 2, irfanulla khan 3 1department of chemistry, p. Apparently, the concentration ranges of the metals detected were. Determination of selected heavy metals and iron concentration in two common fish species in densu river at weija district in grater accra region of ghana tiimub, benjamin makimilua university of education winneba college of agriculture faculty of science and environment department of environmental health and sanitation education. F, edoghotu jonah azibodi department of biology, faculty of pure and applied sciences, ignatius ajuru university of education, rumuolumin, p. The transfer factors of all metals in fish from water were greater than those from sediments. Analysis of heavy metal concentrations in tilapia fish oreochromis niloticus from four selected markets in selangor, peninsular malaysia. Determine if fish caught in the port river met food standards for heavy metals and were safe to eat. Now days the potential toxic effect of heavy metals in the aquatic organisms has been intensively studied. Heavy metals hm are natural trace components of the aquatic environment, but their levels have been increased due to industrial wastes, geochemical structure, agricultural and mining activities. Issn 19956673 pages 41 46 jordan journal of biological sciences levels of heavy metal cd, cu and zn in three fish species collected from the northern jordan valley, jordan s. Generally, accumulation depends on metal concentration, time of exposure, way of metal uptake, environmental conditions water temperature, ph, hardness, salinity, and intrinsic factors fish age, feeding habits. Consumption of fish contaminated with non essential heavy metals such as pb, hg and cd metals which exceed the required limits pose a risk to human health.
Mercury poisoning and heavy metals contamination makes eating. Bioaccumulation of heavy metals in fish tilapia zilli and clarias gariepinus organs from river benue, north. Mercury, lead and cadmium in fishery and aquaculture products. Toxic effects of heavy metals on soil microorganisms in situ near the. It is important to note that this fish species diet is based on small fishes like anchovies, clupeids, carangids, also squids and shrimps. Nov 10, 20 heavy metal toxicity in fish and seafood i dont know about you, but i absolutely love my seafood.
Determination of heavy metals in water, fish and sediment. Bioaccumulation of heavy metals in some tissues of fish in. Baseline concentration of heavy metals in fish collected from. Determination of heavy metal levels in fishes from the. Pdf heavy metals contents of some synthetic fish feeds.
Concepts such as biomagnification, bioaccumulation, biotransference, or concentration factors, convey little information about the real threat originating from heavy metals in an aquatic food chain. A particular concern is potential developmental defects in children exposed in utero. Effect of heavy metals on liver and gill of fish cirrhinus mrigala v. Determination of selected heavy metals and iron concentration. Pollution of heavy metals in aquatic ecosystem is growing at an alarming rate and has become an important worldwide problem arena et al. Of these, heavy metals are regarded as one of the most serious pollutants of the aquatic environment because of their. Analysis of heavy metals in water, sediments and fish samples of madivala lakes of bangalore, karnataka. The increasing amounts of heavy metals entering aquatic environments can result in high accumulation levels of these contaminants in fish and their consumers, which pose a serious risk to ecosystems and human health. It is also absorbed through their gills as they swim. Bioaccumulation of some heavy metals in tilapia fish relevant. Eating certain kinds of fish has become a major health concern due to the amount of heavy metals and other contaminants in water pollution. Essential metals include fe, cu, zn and manganese mn, whereas nonessential metals are hg, pb, nickel ni and cd turkmen et al.