Effects of Heavy Metals on the Aquatic Biota

1997 ◽  
pp. 363-371
Keyword(s):  
Heavy Metals ◽  
Aquatic Biota

scholarly journals TOXICOLOGICAL AND MICROBIOLOGICAL ESTIMATION LEVEL OF POLLUTION ECOSYSTEMS IN THE INDUSTRIAL REGION OF UKRAINE – KRIVOY ROG CITY

2020 ◽  
Vol 73 (9) ◽  
pp. 1962-1967
Author(s):  
Luibov V. Hryhorenko ◽  
Svitlana Yu. Yehorova
Keyword(s):  
Heavy Metals ◽  
Water Samples ◽  
Iron Ore ◽  
Wild Plants ◽  
Aquatic Biota ◽  
Toxic Heavy Metals ◽  
Drinking Purposes ◽  
Ore Processing ◽  
Permissible Levels ◽  
Scientific Substantiation

The aim: Scientific substantiation necessary of PMWW application for the ecologically safe formation of the secondary ecosystems in the mining and iron ore processing areas. Materials and methods: Sanitary-chemical investigation of water samples (n=132); biological objects – plants and aquatic biota was conducted on the content of Pb, Cd, Zn, Mn, Cu, Cr, Ni, Fe (n=112); wild plants samples (n=135); sanitary-microbiological and parasitological indicators 1 – 3 years old waste water sludge (WWS) (n = 68). Results: Overnormal concentrations of salt had been found in water samples, taken from the river Inhulets (2.1 MPL), sulfates and carbonates (2.7 MPL), iron (2.1 MPL), chloride (1.7 MPL), magnesium (3.1 MPL). In wells from nearest villages water is not suitable for drinking purposes and contains total sum of salts – 4.97 MPL, sulfates and carbonates – 5.16 MPL, cadmium – 3.7 MPL, lead – 1.53 MPL. Thus, the toxic heavy metals concentrations (Pb, Cd, Zn, Mn, Cu, Cr, Ni, Fe) in the fish and amphibians did not exceed the permissible levels. Conclusions: Total pollution of the soil within six months after application of sludge correspond to the “permissible” level (Zc=1.61). Use of clearing facilities sludge aged from 1.5 years old and of longer in the amount 15 kg/m2 did not lead to increased concentration of heavy metals in the top layer of dumps.

Impact of heavy metals and nanoparticles on aquatic biota

2018 ◽  
Vol 16 (3) ◽  
pp. 919-946 ◽  
Author(s):  
Sharanjeet Kaur Kahlon ◽  
Gaurav Sharma ◽  
J. M. Julka ◽  
Amit Kumar ◽  
Shweta Sharma ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aquatic Biota

scholarly journals The effects of heavy metals on the incidence of morphological deformities in Chironomidae (Diptera)

2018 ◽  
Vol 35 ◽  
pp. 1-7 ◽  
Author(s):  
Wanesssa Deliberalli ◽  
Rogerio L. Cansian ◽  
Albanin A. Mielniczki Pereira ◽  
Rafael Chaves Loureiro ◽  
Luiz Ubiratan Hepp ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Urban Areas ◽  
Organic Waste ◽  
Urban Stream ◽  
Aquatic Biota ◽  
Southern Brazil ◽  
Chironomid Larvae ◽  
Morphological Deformities ◽  
The Relationship ◽  
Cu And Zn

Streams in urban areas are strongly impacted by the input of organic matter and metals, for instance copper (Cu) and zinc (Zn). These metals are essential for the aquatic biota, but when absorbed in excess they are toxic. In Chironomidae larvae, the deleterious effects of heavy metals can be ascertained by analyzing the morphological deformities of the larval mentum, a structure of the oral cavity. In this study, we evaluated I) the bioavailability of Cu and Zn in urban stream sediments and II) the relationship between Cu and Zn concentrations and the incidence of deformities in the mentum of Chironomus larvae. Chironomid flies were collected from four locations in two streams at an urban area in southern Brazil. They were identified and the incidence of deformities in the mentum was quantified. Sediment samples were collected at the same locations where larvae were collected, to quantify the bioavailable fractions of Cu and Zn. The concentrations of Cu in the sediment were similar between the collection sites. However, Zn concentrations varied among sites, being greater in the stretch directly influenced by the input of the organic waste. In total, 2,895 Chironomid larvae were collected. The incidence of deformities in the mentum was above 30% and was correlated with the concentrations of Cu (r = 0.68) and Zn (r = 0.87). This correlation indicates that the municipal waste that is thrown into the city’s streams has influenced the occurrence of deformities.

The Effect of Benzene on Bluegill Olfactory Lamellae

1985 ◽  
Vol 43 ◽  
pp. 574-575
Author(s):  
D.R. Mattie ◽  
J.W. Fisher
Keyword(s):  
Surface Morphology ◽  
Soluble Fraction ◽  
Lepomis Macrochirus ◽  
Sublethal Concentration ◽  
Water Soluble ◽  
Major Constituent ◽  
Jet Fuels ◽  
Aquatic Biota ◽  
Normal Surface ◽  
Cacodylate Buffer

Jet fuels such as JP-4 can be introduced into the environment and come in contact with aquatic biota in several ways. Studies in this laboratory have demonstrated JP-4 toxicity to fish. Benzene is the major constituent of the water soluble fraction of JP-4. The normal surface morphology of bluegill olfactory lamellae was examined in conjunction with electrophysiology experiments. There was no information regarding the ultrastructural and physiological responses of the olfactory epithelium of bluegills to acute benzene exposure.The purpose of this investigation was to determine the effects of benzene on the surface morphology of the nasal rosettes of the bluegill sunfish (Lepomis macrochirus). Bluegills were exposed to a sublethal concentration of 7.7±0.2ppm (+S.E.M.) benzene for five, ten or fourteen days. Nasal rosettes were fixed in 2.5% glutaraldehyde and 2.0% paraformaldehyde in 0.1M cacodylate buffer (pH 7.4) containing 1.25mM calcium chloride. Specimens were processed for scanning electron microscopy.

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

Nicotianamine: mediator of transport of iron and heavy metals in the phloem?

1993 ◽  
Vol 88 (3) ◽  
pp. 522-529 ◽  
Author(s):  
Udo W. Stephan ◽  
Gunter Scholz
Keyword(s):  
Heavy Metals

Association between heavy metals and depression, anxiety, and panic: A cross-sectional study

2011 ◽  
Author(s):  
Parker Woody ◽  
Michael Zhang ◽  
Craig Pulsipher ◽  
Dawson Hedges ◽  
Bruce Brown
Keyword(s):  
Heavy Metals ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional
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