The mean lipid concentration measured at this sampling point was 3. Bioaccumulation of heavy metals in some fauna and flora. In one study that used comparative acute toxicity testing of 63 heavy metals, cadmium was the most toxic metal. For fish, the bioaccumulation process includes two routes of uptake. Bioaccumulation of heavy metals in fauna and flora in the ijaw area of the niger delta of nigeria were investigated. Based on the results, the concentration of heavy metals in the studied fish tissues proved to be significantly lower than international standards p bioaccumulation therefore results from complex interactions between various routes of uptake, excretion, passive release, and metabolization. These levels may cause adverse neurobehavioural effects in fisheating birds, mammals and. We also determined the distribution of hg in various fish tissues and the change in hg accumulation in these tissues over time. Bioaccumulation of some heavy metals in ayre fish sperata aor hamilton, 1822, sediment and w a t e r o f d h a l e s h w a r i r i v e r i n d r y s e a s o n. In general, the bioaccumulation of heavy metals cr, cu, cd, and pb in various tissues of freshwater fishs values during summer and winter seasons were significantly different showed in fig. In this study, we examined the effects of diet and the trophic position of prey on the bioaccumulation of mercury h g in fish. Thus, further accumulation of cadmium in agricultural lands could result in. 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. Fish accumulate toxic chemicals such as heavy metals directly from water and diet, and contaminant residues may ultimately reach concentrations hundreds or thousands of times above those measured in the water, sediment and food goodwin et al.
Toxicity and bioaccumulation of heavy metals in mullet. In the present study, the bioaccumulation of heavy metals cr, cu, cd. Heavy metals bioaccumulation and histopathological changes. All enter the food chain through industrialwaste and bioaccumulate in aquatic andmarine environments. Bioaccumulation of heavy metals in soil and vegetables. The gill is an important site for the entry of heavy metals heavy metals gills liver kidney flesh cr ni cd pb 0. This led to the conclusion that fish bioaccumulation with these metals was from water. Since environmental release of metals from energy development activities has been of much concern, this report should be useful as a summary of the current state of knowledte on metal bioaccumu lation. Bioaccumulation of heavy metals in marine fish samples. The problem in this study are different levels of heavy metals pb and cr on the tissues of fish in the upstream and downstream brantasriver, difference in levels of heavy metals can damage cells of fish in the upstream and 9. Proceedings of t he 7th asian pacific landfill sy mposium.
Consumption of fish contaminated with metals thus poses a risk to human health. Bioaccumulation of heavy metals in some tissues of fish in the red sea, egypt. Accumulated pb in the gonads of both species ranged from 0. The faunamolluscs and crustacea, and flora hibiscus esculentus and vernonia amygdalina were selected for this study. The analysis of the transfer factor tf and positive correlations p pdf, 54. Bioaccumulation of heavy metals in some tissues of fish in lake. Fish are also considered as one of the most susceptible aquatic organisms to toxic substances present in water alibabic et al. Cadmium concentration in the fish organs were lower than the faowho standard for seafood, thus the fishes with this levels of heavy metals are safe for human consumption. Bioaccumulation of heavy metals in the selected commercially. Heavy metals bioaccumulation and histopathological changes in.
Accumulation of heavy metals and human health risk assessment. Bioaccumulation, fish tissues, heavy metals, seasonal variation. The concentrations of heavy metals in edible part of vegetables table 3 and figure 2 were investigated in vegetables which is commonly grown. Bioaccumulation of mercury, cadmium, zinc, chromium. The accumulation of heavy metals in fish species were analyzed at the end of the experimental period and compared with the experimental fish, which were exposed to the selected heavy metals table 1. Bioaccumulation of heavy metals in fish barbodes sp.
The content of heavy metals in the fish species differed depending on the size, sampling site, or, in some cases, season. 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. Best available scientific information on the effects of. Heavy metals may enter the human body through the consumption of fish and thereby create a serious health hazard 8. Bioaccumulation of metal substances by aquatic organisms. Bioaccumulation of heavy metals in fish, crustaceans. For instance, cd, pb, hg and as are biologically nonessential elements with known adverse effects.
Bioaccumulation of heavy metals is dangerous to human health. It is important to note that bioaccumulationmagnification occur when a substance cannot be easily metabolized or excreted. Bioaccumulation of some heavy metals in tilapia fish. The concentrations of heavy metals cu, zn, pb, cd, fe and mn were measured in the liver, gills and muscles. The results showed that the cr, cu, cd and pb content in the edible parts of the two fish species were much lower. Bio accumulation level of heavy metals compared in the tissuesorgans of c. Differential bioaccumulation of heavy metals in selected. Bioaccumulation of heavy metals in fish clarias gariepinus.
Bioaccumulation of heavy metals in anuran tadpoles. However, there is paucity of information concerning the effects of metals on amphibians. However, the bioaccumulation of the heavy metals was speciesrelated as the accumulations of the heavy metals analysed in the sampled fishes were of the following trend. The transfer factors of all metals in fish from water. This report summarizes the literature on the bioaccumulation of heavy metals in aquatic organisms. Bioaccumulation of nonessential hazardous heavy metals and. Bioaccumulation and potential sources of heavy metal.
The term bioaccumulation is defined as uptake, storage, and accumulation of organic and inorganic contaminants by organisms from their environment. The bioaccumulations of heavy metals concentration in all the vegetables are different, so no similar trend have been observed for heavy metal concentration. This confirms that the growthcorrected depuration rate. Bioaccumulation of heavy metals in fish species collected from former tin mining catchment.
Levels of bioaccumulation of some heavy metals in fish. Bioaccumulation of heavy metals in fish species collected. Cu had the highest accumulating level in fish whilst hg had the lowest. Bioaccumulation of heavy metals in fish species from the meiliang. The measurement of heavy metals in fish can be useful to assessing potential health risks to humans associated with the consumption of fish 9. Heavy metal bioaccumulation in edible fish species from an. Thus, the contamination of fish and the aquatic environment by heavy metals is viewed with serious concern malik et al. The tilapia zilli gills contained the highest concentration 52. Oct 06, 2015 the assessment of heavy metals concentration in tiga dam, nigeria visavis their bioaccumulation and histopathological alterations in auchenoglanis occidentalis from it were carried out.
Heavy metal concentrations in some commercially important fishes and their contribution to heavy metals exposure in palestinian people of gaza strip palestine. Five fish were sampled except for the exposed group at day 0 four fish and the control group at depuration day 28 three fish. The experimental fish was exposed to cr, ni, cd and pb at sublethal concentrations for periods of 32 days. Bioaccumulation of heavy metals in fish, crustaceans, molluscs and echinoderms from the tuscany coast. Investigation of the dependence of depuration rate. Bioaccumulation of heavy metals in fish has been reported by many researchers. Bioaccumulation of heavy metals in t he dead fish samples was tested after aciddigestion of the fish and identif ication via icpms. Metal bioaccumulation in fishes and aquatic invertebrates.
The increasing amounts of heavy metals entering aquatic environments can result in high accumulation levels of these contaminants in fish and their consumers. 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. The concentrations of the heavy metal in water were within the international permissible level. Levels of bioaccumulation of some heavy metals in fish tilapia zilli and their concentration in water and sediment of owubu creek, niger delta, nigeria. Among five metals, pb had the lowest observed effect concentration loec at 1. Jun 18, 2016 bioaccumulation of six heavy metals mn, fe, co, ni, cu, zn in the muscle of highly consumed fish species mastacembelus armatus were measured using atomic absorption spectrometer. Bioaccumulation of polycyclic aromatic hydrocarbons in. Introduction anthropogenic activities continuously increase the amount of heavy metals in the environment, especially in aquatic ecosystem. An additional lipid measurement was made in two fish from the control group at day 21 of depuration. The mean level of heavy metals concentration recorded for this study is in the order pb cu cr cd. These metals, after accumulation by the body of aquatic organisms, enter into food chain and extremely consumed by human. Heavy metals, water pollution, fish, mercury, cadmium, lead, arsenic, health risk, regulations, biomagnification, and bioaccumulation. Bioaccumulation of mercury, cadmium, zinc, chromium, and. The results determined that the highest heavy metals accumulation was found settled in the liver of all selected fish species.
The levels of the heavy metals varied significantly among fish species and organs. Heavy metals bioaccumulation in fish of southern iran and. Bioaccumulation of heavy metals in eight fish species of. Flesh possessed the lowest concentration of all the metals. International journal of environmental research, 6, 1, 2012, 209218. The major goal of this revision of guideline 305 is twofold. Bioaccumulation of heavy metals in organs of fresh water. The water of the dam and the liver of the fish were analyzed for zinc zn, cadmium cd, lead pb and iron fe concentrations and their bioaccumulation factors. The effects of bioaccumulation of heavy metals on fish fin over. Bioaccumulation of heavy metals in fish from the chi river. Pdf effect of different heavy metal pollution on fish. Bioaccumulation of heavy metals in organs of fresh water fish. A few of these elements are poisonous even if present in a low concentration.
The levels of heavy metals varied significantly among fish species and organs. 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 uptake of heavy metals in fish was found to occur through absorption across. Heavy metals, bioaccumulation, tilapia, wadi hanifah.
Ttfs 1 do exist for several metals in the food chain with predatory gastropods at the top of the food web bmfs 1, when observed, are usually in found in low exposure environments bioaccumulation and potential for effects can be assessed by use of regression. 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 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. Bioaccumulation of heavy metals in fish species from the. Bioaccumulation of heavy metals in fish hydrocynus. The mean concentration of zinc in the organs of the studied fish species was highest 8. The mullet fish, liza klunzingeri, commercially important and widely relished by kuwaiti residents, and the stressed ecosystem in kuwait bay instigated us to conduct toxicity and bioaccumulation tests on heavy metals pb, ni, v, cu and fe. The water of the dam and the liver of the fish were analyzed for zinc zn, cadmium cd, lead pb and iron fe concentrations and their bioaccumulation. Bioaccumulation, toxicity, heavy metals, cadmium, zinc, lead, copper, freshwater fish introduction heavy metal according to dianne and william 1999 embraces any metal exposure to which is clinically undesirable and which constitute a potential hazard. Bioaccumulation, heavy metals, carnivorous fish, omnivorous fish. Bioaccumulation of mercury, cadmium, zinc, chromium, and lead. Examples of heavy metals include mercury, cadmium, arsenic, chromium, thallium, and lead. Therefore, fish living in polluted waters tend to accumulate heavy metals in their tissues. 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.
One category of toxic contaminations accumulated by fishes are heavy metals such as lead pb, mercury hg, cadmium cd chromium cr and arsenic as. A comparative study of bioaccumulation of heavy metals in. Heavy metal bio accumulation in fish is important because fish tissues have higher uptake levels of some metals e. Bioaccumulation of heavy metals in some tissues of fish in the. Abstract we examined zn, ni, cr, cu and pb in the muscle, intestine, liver, skin and gills of two fresh water species, aorichthys seenghala carnivorous and ompok bimaculatous omnivorous from a natural water body. 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. Accumulation of heavy metals and human health risk.
Health risk assessment is defined by the us environmen. Heavy metals under study in the edible parts of tilapia were within the safety permissible level for human use. Since the fish meat represents a major components of human diet, the presence of heavy metals in the aquatic environment and their accumulation in fish. Using multifactor probit analysis, toxicity tests 72 h on l.
In the present study, the bioaccumulation of heavy metals cr, cu, cd, pb content were determined in freshwater edible fishes cyprinus carpio linnaeus and pelteobagrus fluvidraco, which were caught from the meiliang bay, taihu lake, a large, shallow and eutrophic lake of china. Ttfs 1 do exist for several metals in the food chain with predatory gastropods at the top of the food web bmfs 1, when observed, are usually in found in low exposure environments bioaccumulation and potential for effects can be assessed by use of regression models. Bioaccumulation of heavy metals cd, pb, cu and zn in scylla. Among the contaminants, heavy metals should be highlighted due to the consequences of their bioaccumulation in aquatic ecosystems nadmitov et al. Results show that molluscs and crustacea accumulate considerable amounts of heavy metals. Owubu creek received effluents such as agric ultural runoff, from farm lands, adjourning and oil spill from nigeria agip. Bioaccumulation of heavy metals in eight fish species of the. Bioaccumulations of heavy metals in fish depend on several factors such as increased. Bioaccumulation of heavy metals in some tissues of fish in. Mercury, cadmium, lead and tin are the heavymetals most frequently endangering humanhealth. Firstly, it is intended to incorporate a dietary bioaccumulation1 test suitable for determining the bioaccumulation potential of substances with very low water solubility.
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. Bioaccumulation of nonessential hazardous heavy 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 very useful for environmental monitoring rashed, 2001. Bioaccumulation of heavy metals in fish tilapia zilli and. Bioaccumulation of polycyclic aromatic hydrocarbons in fish and invertebrates of lagos lagoon, nigeria 1alani rose, 2drouillard ken, 1olayinka kehinde, and 1alo, babajide 1chemistry department, university of lagos, nigeria, africa, and 2great lakes institute for environmental research glier, university of windsor, on, canada. Based on the results, the concentration of heavy metals in the studied fish tissues proved to be significantly lower than international standards p bio accumulation in fish is important because fish tissues have higher uptake levels of some metals e. Contamination of freshwater fish with toxic heavy metals and metalloids is a major environmental issue in terms of public health. Bioaccumulation of six heavy metals mn, fe, co, ni, cu, zn in the muscle of highly consumed fish species mastacembelus armatus were measured using atomic absorption spectrometer.