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Title: Metals toxic effect in aquatic ecosystems: modulaters of water quality
Authors: Gheorghe, Stefania
Stoica, Catalina
Vasile, Gabriela
Nita-Lazar, Mihai
Stanescu, Elena
Lucaciu, Irina Eugenia
Keywords: Metals
Benthic invertebrates
Issue Date: 2017
Publisher: InTech
Abstract: The topic of this work was based on the assessment of aquatic systems quality related to the persistent metal pollution. The use of aquatic organisms as bioindicators of metal pollution allowed the obtaining of valuable information about the acute and chronic toxicity on common Romanian aquatic species and the estimation of the environment quality. Laboratory toxicity results showed that Cd, As, Cu, Zn, Pb, Ni, Zr, and Ti have toxic to very toxic effcts on Cyprinus carpio, and this observation could raise concerns because of its importance as a fihery resource. The benthic invertebrates’ analysis showed that bioaccumulation level depends on species, type of metals, and sampling sites. The metal analysis from the shells of three mollusk species showed that the metals involved in the metabolic processes (Fe, Mn, Zn, Cu, and Mg) were more accumulated than the toxic ones (Pb, Cd). The bioaccumulation factors of metals in benthic inverte‐ brates were subunitary, which indicated a slow bioaccumulation process in the studied aquatic ecosystems. The preliminary aquatic risk assessment of Ni, Cd, Cr, Cu, Pb, As, and Zn on C. carpio revealed insignifiant to moderate risk considering the measured environmental concentrations, acute and long‐term effcts and environmental compartment.
Description: Water Quality, Chapter 4, pp. 59-89
Hlanganani Tutu (ed)
ISBN: 978-953-51-2882-3
Appears in Collections:Book Chapters

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