Biogeochemical Indicators of Aquatic Ecosystem Pollution by Heavy Metals

2004 ◽  
Vol 31 (2) ◽  
pp. 195-202 ◽  
Author(s):  
G. A. Leonova
Keyword(s):  
Heavy Metals ◽  
Aquatic Ecosystem ◽  
Biogeochemical Indicators

Monitoring of the ecological state of the city lake of Chita

2021 ◽  
pp. 52-57
Author(s):  
Vladimir V. Zvyagintsev ◽  
Olga Yu. Zvyagintseva ◽  
Vadim K. Chernyshov
Keyword(s):  
Heavy Metals ◽  
Fluctuating Asymmetry ◽  
Aquatic Ecosystem ◽  
Perca Fluviatilis ◽  
Gibel Carp ◽  
European Perch ◽  
Lake Kenon ◽  
Perch Perca Fluviatilis ◽  
The City

Introduction. The paper presents the results of the studies on assessing the quality of the aquatic ecosystem of a lake located within the city. The European perch (Perca fluviatilis L.) and the Gibel carp (Carassius gibelio) were used as an indicator for determining the quality of the aquatic ecosystem by the method of fluctuating asymmetry. Problem Statement. The aim of the work was to conduct monitoring with the subsequent assessment of the quality of the ecosystem of the city lake using the method of fluctuating asymmetry (hereinafter FA). Theoretical and Practical Part. The quality of the urban lake aquatic ecosystem was assessed using the FA method (indicators: the European perch (Perca fluviatilis L.), 1758 and the Gibel carp (Carassius auratus Bloch), 1783). To identify the reasons for the high PFA values, a chemical analysis (in an accredited laboratory) of the gills of the Gibel carp for heavy metals was performed. Conclusions. As a result of the research, the FA indicators values for these indicators were obtained. According to the results of a laboratory study of the content of heavy metals in the gill arches of the Gibel carp, an excess of the maximum permissible concentration of 8 out of 10 analyzed elements was revealed. It has been established that the ecosystem of the city lake Kenon is experiencing a significant anthropogenic load (5 points — the critical quality of the aquatic environment) and it continues to increase towards the deterioration of the habitat.

Aerial input of heavy metals into an aquatic ecosystem

1976 ◽  
Vol 5 (4) ◽  
pp. 443-451 ◽  
Author(s):  
T. Peytoni ◽  
A. Mcintosh ◽  
V. Anderson ◽  
K. Yost
Keyword(s):  
Heavy Metals ◽  
Aquatic Ecosystem

Determination of the level of some heavy metals in an aquatic ecosystem by instrumental neutronactivation analysis

1988 ◽  
Vol 9 (9) ◽  
pp. 969-976 ◽  
Author(s):  
M. C. Freitas ◽  
M. C. Vaz Carreiro ◽  
M. F. Reis ◽  
E. Martinho
Keyword(s):  
Heavy Metals ◽  
Aquatic Ecosystem

scholarly journals Can thiol compounds be used as biomarkers of aquatic ecosystem contamination by cadmium?

2009 ◽  
Vol 2 (3) ◽  
pp. 177-183 ◽  
Author(s):  
Jana Kovářová ◽  
Zdeňka Svobodová
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Molecular Mass ◽  
Aquatic Ecosystem ◽  
Anthropogenic Activities ◽  
Aquatic Organisms ◽  
Trophic Levels ◽  
Aquatic Animals ◽  
Thiol Compounds ◽  
Potential Use

Can thiol compounds be used as biomarkers of aquatic ecosystem contamination by cadmium?Due to anthropogenic activities, heavy metals still represent a threat for various trophic levels. If aquatic animals are exposed to heavy metals we can obviously observe considerable toxicity. It is well known that an organism affected by cadmium (Cd) synthesize low molecular mass thiol compounds rich in cysteine (Cys), such as metallothioneins (MT) and glutathione (GSH/GSSG). The aim of this study was to summarize the effect of Cd on level of thiol compounds in aquatic organisms, and evaluate that the concentrations of thiol compounds are effective indicators of Cd water pollution and explain their potential use in biomonitoring applications.

Ecotoxic heavy metals transformation by bacteria and fungi in aquatic ecosystem

2015 ◽  
Vol 31 (10) ◽  
pp. 1595-1603 ◽  
Author(s):  
Amiy Dutt Chaturvedi ◽  
Dharm Pal ◽  
Santhosh Penta ◽  
Awanish Kumar
Keyword(s):  
Heavy Metals ◽  
Aquatic Ecosystem ◽  
Bacteria And Fungi

Assessment of sediment toxicity by metal speciation in different particle-size fractions of river sediment

2003 ◽  
Vol 47 (7-8) ◽  
pp. 233-241 ◽  
Author(s):  
J.G. Lin ◽  
S.Y. Chen ◽  
C.R. Su
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Aquatic Ecosystem ◽  
Metal Speciation ◽  
Sediment Toxicity ◽  
Clay Fraction ◽  
Potential Toxicity ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Mn Oxide

Mobility and toxicity of metals associated with sediments are generally affected by metal speciation and granular compositions. Due to the various speciation patterns of heavy metals in sediments, it is not reliable to assess the potential toxicity of heavy metals on the aquatic environment with the total concentrations of heavy metals in sediments. The purposes of this study were to investigate the distribution of metal speciation in different particle-size fractions of sediments collected from two rivers (the Ke-Ya River and Ell-Ren River) in Taiwan, and to assess their potential toxicity to the aquatic ecosystem. Metals in the exchangeable, carbonate-bound and Fe/Mn oxide-bound forms obtained by sequential extraction were considered to be mobile and related with anthropogenic pollution. The degree of metal pollution and potential toxicity of sediments were higher in the lower reaches of both rivers. The metal speciation in sediments had a bimodal distribution over particle-size fractions. Heavy metals were subject to accumulation in the silt/clay fraction (<25μmm) and coarse sand (420-2,000μmm). By normalizing the sum of the exchangeable, carbonate-bound, and Fe/Mn oxide-bound metals, it suggested that the potential toxicity to the aquatic ecosystem was caused by the fine sediments as well as coarse sediments.

Concerns and Threats of Heavy Metals’ Contamination on Aquatic Ecosystem

2020 ◽  
pp. 1-19
Author(s):  
Mehvish Hameed ◽  
Zulaykha Khurshid Dijoo ◽  
Rouf Ahmad Bhat ◽  
Irteza Qayoom
Keyword(s):  
Heavy Metals ◽  
Aquatic Ecosystem ◽  
Heavy Metals Contamination

scholarly journals Distribution of essential heavy metals in the aquatic ecosystem of Lake Manzala, Egypt

Heliyon ◽  
2019 ◽  
Vol 5 (8) ◽  
pp. e02276 ◽  
Author(s):  
Randa R. Elmorsi ◽  
Khaled S. Abou-El-Sherbini ◽  
Gamal Abdel-Hafiz Mostafa ◽  
Mohamed A. Hamed
Keyword(s):  
Heavy Metals ◽  
Aquatic Ecosystem ◽  
Lake Manzala

scholarly journals Heavy Metals Concentrations in the Shell and Tissue of Periwinkle (Tympanotonus fuscatus) and Giant Land Snail (Achatina fulica) in Soku Community of Niger Delta, Nigeria.

2014 ◽  
Vol 10 (3) ◽  
pp. 2426-2429
Author(s):  
Nwoko C.I.A. ◽  
Ukiwe L.N.
Keyword(s):  
Heavy Metals ◽  
Soft Tissue ◽  
Local Government ◽  
Aquatic Ecosystem ◽  
Niger Delta ◽  
Land Snail ◽  
Anthropogenic Sources ◽  
Achatina Fulica ◽  
Rivers State ◽  
Periwinkle Shell

The pollution of aquatic ecosystem by heavy metals has assumed serious proportions due to their toxicity and accumulative behaviour. River dams are especially at risk of contamination by different contaminants from anthropogenic sources including heavy metals since change of sediment regime often occur. The accumulation of five heavy metals; chromium (Cr), Cadmium (Cd), Lead (Pb), Copper (Cu) and Arsenic (As) in periwinkle, (Tympanotonus fuscatus, var, radula) and giant land snail (Achatina fulica) shell and soft tissue collected from Soku Community, Akuku-toru Local Government Area of Rivers State, Nigeria. The periwinkle and giant land snail were processed and analyzed for heavy metals presence. Results obtained showed that the periwinkles accumulated more of these heavy metals than the snails. Copper and arsenic were the highest concentrated heavy metals in the periwinkle shell soft tissue. The concentration of copper and arsenic in periwinkles soft tissue was found to be l,612 mg/kg and 2.40 mg/kg respectively. In the giant land snail the soft tissue concentrated more of copper (277 mg/kg). These values exceeded set standards for guidelines on toxicity.

Sign in / Sign up

Export Citation Format

Share Document