Determination of heavy metals in freshwater fishes of the. One of such pollution is marine pollution by heavy metals. The order of heavy metal accumulation in water was cu cr pb cd hg. Bioaccumulation of heavy metals is dangerous to human health. Proceedings of t he 7th asian pacific landfill sy mposium. The heavy metals concentration in fish is important both with respect to nature management and human consumption.
To evaluate whether the measured metals showed greater accumulation in hepatopancreas or abdominal muscle of crayfish, the nonparametric wilcoxon test for matched pairs was conducted table 5. Bioaccumulation of nonessential hazardous heavy metals. The content of heavy metals in the fish species differed depending on the size, sampling site, or, in some cases, season. Consumption of fish from polluted environment should be discouraged. Heavy metal concentrations in ten species of fishes caught. Analysis of heavy metals in water and fish tilapia. Bioaccumulation of heavy metals in some tissues of fish in.
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. Analysis of fish sample for heavy metals dry fish sample was weighed for about 0. Metal bioaccumulation in fishes and aquatic invertebrates. The effects of heavy metals on aquatic animals khayatzadeh j. Metals deserving further attention with respect to their propensity for accumulation in edible fish tissues include mercury, arsenic and radioactive cesium. Abida begum 1, harikrishna s 2, irfanulla khan 3 1department of chemistry, p. The objective of the present study is to determine the bioaccumulation of heavy metals in various organs of the fresh water fish exposed to heavy metal contaminated water system. 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. The monitoring of metal concentrations in fish meat is therefore important to ensure compliance. Heavy metals such as copper, iron, chromium and nickel are essential metals since their play an important role in. Determination of heavy metals in water, fish and sediment.
Introduction freshwater ecosystems are a subset of earths aquatic ecosystems. Department of biology, sciences faculty, islamic azad university, mashhad branch, mashhad, iran email. The experimental fish was exposed to cr, ni, cd and pb at sublethal concentrations for periods of 32 days. Heavy metals, fish, marine, atomic absorption spectrometry, libyan coastline. The current study aimed to determine the heavy metal concentration and toxicity in some freshwater fish species collected from the tigris river. International national standards for heavy metals in food dr yy choi chemist. Risk to human health article pdf available in environmental chemistry letters 163. The numerous health benefits provided by fish consumption may be compromised by the presence of toxic metals and metalloids such as lead, cadmium, arsenic and mercury, which can have harmful effects on the human body if consumed in toxic quantities. Bioaccumulation of mercury, cadmium, zinc, chromium. Comparison of heavy metals burden in two fresh water fish. Analysis of heavy metals in water, sediments and fish samples of madivala lakes of bangalore, karnataka. S school of engineering,hosur road, near electronic city, bangalore100,india. Bioaccumulation of heavy metals in marine fish samples.
Heavy metals in water in the water samples, the average concentration of heavy metals, pb, cd, hg, cu and cr, were 0. Among the analysed metals in muscle tissue of sampled fish, only mercury exceeded the maximal level 0. Heavy metals, hematology, blood glucose, common carp, cyprinus carpio l. Metallothionein expression as a biomarker and histopathological study on liver and gills 1,2metwally montaser, 3magdy e. Determination of heavy metal levels in fishes from the lower. Accumulation of heavy metals fe, mn, cu, zn, ni, pb, cd. The measurement of heavy metals in fish can be useful to assessing potential health risks to humans associated with the consumption of fish 9. Inverse relationship between diet and ttf dietary zn g g1 dw. 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. Bioaccumulation of heavy metalssome of the substances that make up earths crust are elements, substances that cannot be naturally broken down into simpler substances. The levels of the heavy metals varied significantly among fish species and organs.
Differential bioaccumulation of heavy metals in selected. Fish have been considered good indicators for heavy metal contamination in aquatic systems because they oc cupy different trophic levels with different sizes and. The concentration of heavy metals in the different organs bone liver, and gills of t. The concentrations of heavy metals al, as, cd, cu, fe, pb and zn in fish at the three different. Analysis of heavy metals in water, sediments and fish samples. Determination of heavy metals in fish tissues and water. Accumulation of heavy metals in fishes of freshwater 1. F zoology department of zoology university of delhi may, 2016 2. Assessment of heavy metals in water, fish and sediments. The concentrations of the heavy metal in water were within the international permissible level. Heavy metal concentrations were bellow the limits of admissibility laid down in international regulations for the samples analyzed. Chronic exposure metallothionein and can be tested for metal toxicity via of rainbow trout gill and liver cell lines showeda mt measurements, fish and mussels have demonstrate d reduction in cell membrane integrity, mitochondrial higher rates of accumulation for metals than other species. Issue paper on the bioavailability and bioaccumulation of metals draft john drexler,1 nicholas fisher,2 gerry henningsen,3 roman lanno,4 jim mcgeer,5 keith sappington6 contributing author.
The elements cd, pb, ni and cr were assayed using shimadzu aa 6200 atomic absorption. The study suggested that the presence of toxic heavy metals in aquatic environment has strong influence on the hematological parameters in the fresh water fish common carp cyprinus carpio l. Bioaccumulation of heavy metals in organs of fresh water fish. Al, cu, fe and zn were detected by the icpoes although concentration of as, cd and pb were consistently below the detection limit. Accumulation of heavy metals fe, mn, cu, zn, ni, pb, cd and. The levels of heavy metals varied significantly among fish species and organs. Faowho, our research led to withdraw of some batches of the fish from the czech markets. Pollution of rivers causes the degradation of biodiversity. Bioaccumulation of heavy metals in soil and vegetables. After digestion, the sample was allowed to cool and filtered. The presence of these metals analysed in the body parts of fish serves as an indicator for the extent of heavy metal pollution of the water body from where these aquatic organisms fish are obtained. Among the contaminants, heavy metals should be highlighted due to the consequences of their bioaccumulation in aquatic ecosystems nadmitov et al.
Heavy metals mercury, arsenic, cadmium, plumbum in selected. Bioaccumulation of heavy metals in organs of fresh water. Determination of heavy metals in fish tissues and water from. Central european institute of technology, brno university of technology. Determination of heavy metals cd, co, cu, ni and pb in. Toxic metals, fish oil, icpms, total quant method 1. Whereas, topping 1973 suggested that mainly plankton feeding fish contain much higher concentrations of some heavy metals than bottom feeding fish. Bioaccumulation level of heavy metals compared in the tissuesorgans of c. Cu content was the highest and that of cd was the lowest in water. However, consumers should bear in mind that standards have a margin ofsafety. Abdelrahman and 2sayed bakry 1department of biotechnology, faculty of science, taif university, 888 hawia, taif, ksa. Heavy metals in marine fish meat and consumer health. 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. The concentrations of heavy metals in edible part of vegetables table 3 and figure 2 were investigated in vegetables which is commonly grown.
In the czech republic, as in other developed parts of the world, there is an increased risk of heavy metals. The analysis of the transfer factor tf and positive correlations p sediments and fish samples of madivala lakes of bangalore, karnataka. Unlike mercury, most metals are not accumulated in the edible portions of fishes and do not represent a threat to human consumers of fish unless the fish are eaten in their entirety table 1. Examples of heavy metals include mercury, cadmium, arsenic, chromium, thallium, and lead. Sprat is zooplanctonivorous fish and has high metabolic rate. Bioaccumulation of heavy metals in fish species from the meiliang. Heavy metal concentrations in ten species of fishes caught in. Bioaccumulation of heavy metals in fish species from the meiliang bay, taihu lake, china. Bioaccumulation of heavy metals in some tissues of fish in the. Fish constitute an important source of protein for many people throughout the world and fish consumption has increased in importance among healthconscious people because it provides healthy and low cholesterol sources of protein and other nutrients 5 burger j, gochfeld m.
Bioaccumulation of heavy metals in t he dead fish samples was tested after aciddigestion of the fish and identif ication via icpms. Lead, cadmium, cobalt, nickel, and mercury can affect the formation of blood cells. Sediments are important for various pollutants like pesticides and heavy metals and also play a significant role in remobilization of. The average concentrations of studied heavy metals in johnius belangerii from musa estuary gg d. Accumulation of heavy metals in fishes of freshwater 1 1. Fish living in polluted waters tend to accumulate heavy metals in their tissues. There were significant differences between the concentration of cu and pb in fish from different stations. Pdf bioaccumulation of heavy metals in fish hydrocynus. Heavy metals like mercury and cadmium are known to accumulate in marine organisms and cause rapid genetic changes nimmo et al. Heavy metals may enter the human body through the consumption of fish and thereby create a serious health hazard 8. Bioaccumulation of nonessential hazardous heavy metals and metalloids in freshwater fish.
Heavy metalscontamination creates problem in those species. Toxicity of heavy metals on fish at jeddah coast ksa. Bioaccumulation of heavy metal in three fresh water fishes. Accumulation of heavy metals in fishes of freshwater lakes of india harsimran kaur brar m. Heavy metals such as cadmium, lead and mercury are significant environmental contaminants. Heavy metals red sea fish bioaccumulation monitoring abstract 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. Bioaccumulation of heavy metals in fish species collected. Flesh possessed the lowest concentration of all the metals. Reports using levels of heavy metals in fish to indicate and assess the contamination of heavy metals in water have been found to be. Bioaccumulation of metal substances by aquatic organisms.
International national standards for heavy metals in food. Cu had the highest accumulating level in fish whilst hg had the lowest. Assessment of heavy metals in water, fish and sediments from. This paper assesses the potential human health risks posed by five heavy metals zn, pb, cu, cd, and cr found in seven most consumable fish. Determination of heavy metal levels in fishes from the. The elements cd, pb, ni and cr were assayed using shimadzu aa 6200 atomic absorption spectrophotometery and. The concentrations of heavy metals cu, zn, pb, cd, fe and mn were measured in the liver. This study determined that the fish species caught in the kelantan river were contaminated with nonessential metals cd, ni and pb. Bioaccumulation of mercury, cadmium, zinc, chromium, and. Bioaccumulation of heavy metals in fish species from the. In general, studies on heavy metals by fish analysis can be important in two main aspects. Determination of selected heavy metals and iron concentration. The analysis of the transfer factor tf and positive correlations p of selected metals in fish muscle tissues and water indicated the direct accumulation of metals from the water to the fish.
Heavy metal bioaccumulation in edible fish species from an. Assessment of heavy metal residues in water, fish tissue and human. Heavy metal bioaccumulation in fish is important because fish tissues have higher uptake levels of some metals e. Bioaccumulation of heavy metals zn, pb, cd, and cu was determined in the liver, gills, and flesh from benthic and pelagic fish species collected from lake geriyo covering two seasons. The fish organs studied are in the order of liver gills bone figure. Bioaccumulation of heavy metals in fish, squids and crustaceans from the red sea, jeddah coast, saudi arabia. Bioaccumulation of heavy metals in fish from the chi river. Patilb achemical department, oil india limited, duliajan, assam786602. Analysis of heavy metals in water and fish tilapia sp.
Pdf effect of different heavy metal pollution on fish. Therefore, its study constitutes a tool for environmental assessment and for determining public health risk reinfelder et al. Lead and cadmium levels in ubeji river significantly. The heavy metals are accumulated in the marine environment then transfer to the marine organisms e. The buildup of heavy metals can cause malfunctions in the liver, kidneys, the circulatory system responsible for the circulation of blood throughout the body, and the movement of nerve signals. Pdf bioaccumulation of heavy metals in fish, squids and.
Bioaccumulation of some heavy metals in tilapia fish. First, from the public health point of view, where the attention has been drawn to the necessity of measuring the accumulation of heavy metals. Bioaccumulation of heavy metals in fish clarias gariepinus. Bioaccumulation of some heavy metals in tilapia fish relevant. Heavy metals bioaccumulation in fish of southern iran and. Bioaccumulation and potential sources of heavy metal. Heavy metals mercury, arsenic, cadmium, plumbum in. 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. Determination of heavy metal levels in fish from kelantan. A few of these elements are poisonous even if present in a low concentration.
The present study documents bioaccumulation heavy metals in two fish species from meiliang bay, lake taihu. Heavy metals in commercial fish in new jersey environ res 2005. The accumulation of heavy metals in fish is an important issue because many fish species are consumed as a source of protein by a large section of the population, especially those who live near rivers. Fish have the ability to accumulate heavy metals in their tissues by absorption along gill surface and kidney, liver and gut tract wall to higher. Determination of heavy metals in water, fish and sediment from ureje water reservoir. The increasing amounts of heavy metals entering aquatic environments can result in. The concentration of co in muscle was below the detection limit of the aas. Accumulation of heavy metals in crayfish and fish from. The low saturated fat and sufficient omega fatty acids in fish are also important in supporting good human health. Analysis of heavy metals of muscle and intestine tissue in fish in. The rest of selected heavy metals were still not detected in tilapia table 3.
The bioaccumulation of these toxins in fish oil capsule confirms the safety of longterm use of the supplements studied. Department of chemistry and biochemistry mendel university in brno. Introduction pollution of different environments is due to human activities in recent years. To compare accumulation in abdominal muscle, hepatopancreas, and gill of specimens from the contaminated site, the friedman anova test was applied table 6. The transfer factors of all metals in fish from water. The bioaccumulations of heavy metals concentration in all the vegetables are different, so no similar trend have been observed for heavy metal concentration. Then, 5 ml of 65% nitric acid was added and the mix was stored at room temperature for 1 day.