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The Eurasian minnow Phoxinus phoxinus from Piekielnik Stream: female (above) and male (below) (by M. Patrzałek, 2007).
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Concentration of the four heavy metals (Cu, Zn, Pb, Cd) in tissues of the Eurasian minnow Phoxinus phoxinus from Polish part of the Czarna Orawa River system was investigated using the AAS method. Significant differences among sampling sites were recorded, and visible trend was observed, i.e. concentrations of these metals arose from the upper most...
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Citations
... Heavy metals are natural constituents of the earth crust which unsystematic anthropogenical activities have significantly distorted their geochemical cycles and biochemical balance (Singh et al., 2011). They comprise elements that are necessary for living organisms including manganese, cobalt, zinc, copper, molybdenum and others (Duffus, 2002), but at high concentration, are harmful (Popek et al., 2008). ...
The research examined the accumulations of six heavy metals including chromium (Cr), lead (Pb), iron (Fe), zinc (Zn), cadmium (Cd), and copper (Cu) in water as well as in three male and female species of crab (Cardisoma armatum, Callinectes danae, Callinectes ornatus) sampled from Ojo River in Lagos State of Nigeria. Physico-chemical parameters of the water samples from the River and heavy metal concentrations in the crab species obtained also from the River were examined using standard methods. The results showed that total dissolved solute (TDS), electrical conductivity (EC), salinity, dissolved oxygen, biological oxygen demand and chemical oxygen demand varied significantly along the River course, with TDS and EC being relatively high. Heavy metals detected in the crabs were Fe, Cu and Zn, with Cu being the highest in the species examined. The species C. ornatus presented the highest content of Cu followed by C. armatum and C. danae. The content of heavy metals (mg kg-1) among the crab species showed that Cu (23.47±0.10) > Zn (19.06±0.01) > Fe (16.85±0.01) in all the species except in C. armatum where Fe (1.26±0.44) was > Zn (1.19±0.02). Furthermore, Pb, Cd and Cr were not found in the crabs and this could be associated with the fact that the area consists mainly of residential houses, farms and a few industries. Notably, the content of the heavy metals was larger in the female than the male crabs. This study reported different levels of heavy metal accumulation in male and female species of crabs. Also, the shell fishes from Ojo River might be considered safe for consumption, but the need for continuous monitoring to prevent bioaccumulation is recommended.
... Typical results of the human activities have as result in an increased levels of heavy metals present in freshwater and among these: cadmium, chromium, nickel, lead, manganese, and zinc are most specific (Farkas et al 2001). There is a need to quantify also the external influences from the Danube situated close to study area, which have a significant impact on these sensitive ecosystems and analyze, especially, heavy metals accumulation in water, plankton and sediment (Iticescu et al 2013), because health of aquatic organisms is directly influenced by heavy metal pollution and affected by their tendency to bioconcentration in different tissue types (plant, animal or human) (Popek et al 2008(Popek et al , 2009Mudgal et al 2010a,b;Oroian et al 2013;Ndome et al 2014;Riani et al 2014;Ernawati 2014;Petrovici & Pacioglu 2010). ...
... Typical results of the human activities have as result in an increased levels of heavy metals present in freshwater and among these: cadmium, chromium, nickel, lead, manganese, and zinc are most specific (Farkas et al 2001). There is a need to quantify also the external influences from the Danube situated close to study area, which have a significant impact on these sensitive ecosystems and analyze, especially, heavy metals accumulation in water, plankton and sediment (Iticescu et al 2013), because health of aquatic organisms is directly influenced by heavy metal pollution and affected by their tendency to bioconcentration in different tissue types (plant, animal or human) (Popek et al 2008(Popek et al , 2009Mudgal et al 2010a,b;Oroian et al 2013;Ndome et al 2014;Riani et al 2014;Ernawati 2014;Petrovici & Pacioglu 2010). ...
The aim of the present study is to determine the accumulation of heavy metals in plankton
collected from four aquatic complexes: Somova-Parcheş, Şontea-Fortuna, Holbina-Dunavăţ (with the
highest concentrations of heavy metals) and Matiţa-Merhei, from the Danube Delta area, one of the most
important Biodiversity Reserve in Europe. In order to achieve this study, the concentrations of six heavy
metals were taken into account: cadmium, chromium, nickel, lead, manganese, and zinc. The study was
conducted during a five year period 2007-2011 and the statistical analysis were based on mean
concentrations, expressed in μg/g. Samples were digested at the Anton Paar microwave oven and
analyzed by mass spectrometry with inductively coupled plasma (ICPMS). High values of
bioconcentration factor in plankton (BCF) have been found for cadmium; expressed as a ratio of the
concentration of a chemical inside an organism to the concentration in the surrounding environment.
Also, the results show that plankton has a very high potential of heavy metals accumulation, most
significant variation of heavy metals concentrations in plankton is depend on the aquatic complexes
position from the Danube River and also on the influence of anthropogenic sources.
Keywords: nature reserve, aquatic ecosystem, bioconcentration, biodiversity, water pollution.
... Typical results of the human activities have as result in an increased levels of heavy metals present in freshwater and among these: cadmium, chromium, nickel, lead, manganese, and zinc are most specific (Farkas et al 2001). There is a need to quantify also the external influences from the Danube situated close to study area, which have a significant impact on these sensitive ecosystems and analyze, especially, heavy metals accumulation in water, plankton and sediment (Iticescu et al 2013), because health of aquatic organisms is directly influenced by heavy metal pollution and affected by their tendency to bioconcentration in different tissue types (plant, animal or human) (Popek et al 2008(Popek et al , 2009Mudgal et al 2010a,b;Oroian et al 2013;Ndome et al 2014;Riani et al 2014;Ernawati 2014;Petrovici & Pacioglu 2010). ...
The aim of the present study is to determine the accumulation of heavy metals in plankton
collected from four aquatic complexes: Somova-Parcheş, Şontea-Fortuna, Holbina-Dunavăţ (with the
highest concentrations of heavy metals) and Matiţa-Merhei, from the Danube Delta area, one of the most
important Biodiversity Reserve in Europe. In order to achieve this study, the concentrations of six heavy
metals were taken into account: cadmium, chromium, nickel, lead, manganese, and zinc. The study was
conducted during a five year period 2007-2011 and the statistical analysis were based on mean
concentrations, expressed in μg/g. Samples were digested at the Anton Paar microwave oven and
analyzed by mass spectrometry with inductively coupled plasma (ICPMS). High values of
bioconcentration factor in plankton (BCF) have been found for cadmium; expressed as a ratio of the
concentration of a chemical inside an organism to the concentration in the surrounding environment.
Also, the results show that plankton has a very high potential of heavy metals accumulation, most
significant variation of heavy metals concentrations in plankton is depend on the aquatic complexes
position from the Danube River and also on the influence of anthropogenic sources.
... Heavy metal comprises a number of elements which are manganese, chromium lead, cadmium, etc. (Mazvila, 2001), but these metals are also the most important source of necessary for living organisms: that is, iron, zinc, copper, pollution (Chovanec et al., 2003;Popek et al., 2008). The subject of heavy metal is receiving increasing popularity in food industry due to high incidence of contamination in agricultural and seafood *Corresponding author. ...
Heavy metal concentrations (lead, cadmium, zinc, copper, chromium and manganese) in selected fish species from Eleyele reservoir Ibadan Oyo State South-Western Nigeria were investigated. A sample each of catfish (Clarias gariepinus), Africa pike (Hepsetus odoe) and tilapia fish (Oreochromis niloticus) from Eleyele lake Ibadan Oyo state were collected from fish farmers at the landing site early in the morning using standard procedure and transported to the laboratory within 30 minutes for laboratory analysis. Heavy metal concentration in the flesh of the fish species and water sample were analysed using atomic absorption spectrophotometer. There existed significant difference (p<0.05) in the concentration of heavy metals in fish flesh of various fish species with that of herbivorous fish (Tilapia fish) being the highest followed by omnivorous fish (catfish), followed by piscivorous fish (H. odoe), while that of the water body was the lowest. It was concluded that fish could be considered bio-indicator of environmental contamination within the aquatic ecosystem; it also indicates that fish could be useful in estimating bioavailability of metal to freshwater biota.
... Typical results of the human activities have as result in an increased levels of heavy metals present in freshwater and among these: cadmium, chromium, nickel, lead, manganese, and zinc are most specific (Farkas et al 2001). There is a need to quantify also the external influences from the Danube situated close to study area, which have a significant impact on these sensitive ecosystems and analyze, especially, heavy metals accumulation in water, plankton and sediment (Iticescu et al 2013), because health of aquatic organisms is directly influenced by heavy metal pollution and affected by their tendency to bioconcentration in different tissue types (plant, animal or human) (Popek et al 2008(Popek et al , 2009Mudgal et al 2010a,b;Oroian et al 2013;Ndome et al 2014;Riani et al 2014;Ernawati 2014;Petrovici & Pacioglu 2010). ...
The aim of the present study is to determine the accumulation of heavy metals in plankton
collected from four aquatic complexes: Somova-Parcheş, Şontea-Fortuna, Holbina-Dunavăţ (with the
highest concentrations of heavy metals) and Matiţa-Merhei, from the Danube Delta area, one of the most
important Biodiversity Reserve in Europe. In order to achieve this study, the concentrations of six heavy
metals were taken into account: cadmium, chromium, nickel, lead, manganese, and zinc. The study was
conducted during a five year period 2007-2011 and the statistical analysis were based on mean
concentrations, expressed in μg/g. Samples were digested at the Anton Paar microwave oven and
analyzed by mass spectrometry with inductively coupled plasma (ICPMS). High values of
bioconcentration factor in plankton (BCF) have been found for cadmium; expressed as a ratio of the
concentration of a chemical inside an organism to the concentration in the surrounding environment.
Also, the results show that plankton has a very high potential of heavy metals accumulation, most
significant variation of heavy metals concentrations in plankton is depend on the aquatic complexes
position from the Danube River and also on the influence of anthropogenic sources.
Keywords: nature reserve, aquatic ecosystem, bioconcentration, biodiversity, water pollution.
... Heavy metal comprises a number of elements which are necessary for living organisms: that is, iron, zinc, copper, manganese, chromium etc. (Mazvila, 2001), but these metals are also the most important forms of pollution (Chovanec et al., 2003;Popek et al., 2008). Heavy metal effects freshwater organisms and induces certain harmful modifications at histological and morphological levels, also decreases the growth and developmental rates resulting in increase of death rate and the decrease of birth rate (Authman, 2008). ...
... Fish were the chosen for this survey due their potential of accumulating heavy metals in their tissues, and for being usually the most frequent used taxa in the estimation of pollution with heavy metals (Lamas et al., 2007;Popek et al., 2008). ...
The Cadmium (Cd), Copper (Cu), Magnesium (Mg), Manganese (Mn) and Zinc (Zn) levels were studied to estimate the risk of human consumption and pollution of Indus River which is important for the country. The fish samples were collected from different locations in the river Indus near Ghazi Ghat area, Pakistan and were analyzed using atomic absorption spectrophotometer (AAS). The values obtained for the five metals were in accordance with the threshold limit concentrations for fish meat imposed by European and other international normative. Cadmium was not detected in any of the sample. Regressions were performed for both size and condition factor with metal concentrations. Mg and Zn were found highly correlated with size (length and weight). Mn was found significant and Cu was the least significant with total length while these were insignificant with increasing weight. Condition factor showed significant (P < 0.05) relation with Mn concentration only.
... They are representative for continental waters, covering a large ecological valence, from criofile organisms to euritherm and termophilic organisms, being highly euribiont. Although the notoriety standards envisage aquarium fish utilization (guppy, fathed minow etc) or small sized cyprinids from the genus Phoxinus (Popek et al 2008;Petrovici & Pacioglu 2010), actual tendency certified by the papers of the last years is to work with culture fish (carp, perch, tilapia, Prussian carp), because they are easy to access. ...
EDTA is a chelating agent used deliberately in various fields (pulp and paper industry,detergents industry, food industry, medicine, biomedical labs) in order to sequester metal ions whichhave harmful effects in many processes as well as in obtaining of many products. Taking as starting pointthe EDTA property to form metal-EDTA complexes we decided to test its effectiveness in mobilizing of thecontaminant metal ions, especially cadmium from tissue of Prussian carp specimens subjected to chronicpoisoning with cadmium acetate. At the same time we investigated the EDTA ability to reduce the knowncadmium antagonism exhibited vis-à-vis some essential macro-and microminerals.
... They are representative for continental waters, covering a large ecological valence, from criofile organisms to euritherm and termophilic organisms, being highly euribiont. Although the notoriety standards envisage aquarium fish utilization (guppy, fathed minow etc) or small sized cyprinids from the genus Phoxinus (Popek et al 2008;Petrovici & Pacioglu 2010), actual tendency atested by the papers of the last years is to work with culture fish (carp, perch, tilapia, Prussian carp), because they are easy to acces. ...
Due to their interesting physico-chemical properties (i.e. cation-exchange capacity,adsorption, catalysis and dehydration), natural zeolites are useful in very different fields: agriculture,animal husbandry, chemical and pharmaceutical industry, environmental protection (water, air and soildepollution). Ion-exchange capacity of zeolites consists in their ability to retain divalent cations such asCa2+, Mg2+, Cu2+, Cd2+, Fe2+, Zn2+ from a contact solution, yielding to the solution an equivalent amountof an own cation (Na+). In this paper we have exploited this property of a zeolite (namely clinoptilolite) inan attempt to reduce Cd bioaccumulation in tissues of Prussian carp specimens under inducedintoxication with cadmium acetate and Cd antagonism as against some essential micro- andmacroelements - Fe2+, Zn2+, Cu2+, Ca2+ and Mg2+ at the same species.
... Fish were the chosen taxonomic group for this survey due their potential of accumulating heavy metals in their tissues, and for being usually the most frequent used taxa in the estimation of pollution with heavy metals (Chovanec et al 2003;Lamas et al 2007;Popek et al 2008). In addition, as part of the human diet, they can pass the heavy metal burden to the consumers triggering acute or chronic intoxications. ...
The aim of this paper is to establish the potential bioaccumulation of five heavy metals (Cu,Cd, Ni, Co, Zn) in two species of fish from Crişul Negru River (Romania), moderately polluted from amining area, comparative with the fish sampled from Crişul Repede River, considered as a control site.The sampling periods extended along three campaigns/ each month, from a total of ten months, on foursites situated along the Crişul Negru River and on a control site situated on the neighbouring stream, theCrişul Repede River, same catchment. The values obtained for the five heavy metals were in accordancewith values registered in the water column and the upper threshold limit concentrations for fish meatimposed by European and other international normative, but with one exception. The increased valuesfor cobalt accumulated in the fish from the immediate locations of a mining site do make them improperfor human consumption.
