Copper accumulation and toxicity in the yellow clam Mesodesma mactroides DESAHYES 1854 (BIVALVIA, MESODESMATIDAE)

The yellow clam Mesodesma mactroides depends on the intertidal zone of the southernmost Brazilian sandy beaches for recruitment or settlement. Studies aiming to evaluate any kind of alteration of this ecosystem are very important because of the growing industrial and urban development observed around this region over the last decades. Therefore, the main goal of the present study was to evaluate copper accumulation and toxicity in M. mactroides to verify its response to increased environmental levels of this metal. Yellow clams were acutely (96 h) exposed to copper for determination of copper accumulation and toxicity (LC50). Results showed that M. mactroides accumulated copper in its tissues (gills and digestive gland) and was quite tolerant to copper, suggesting this species as a suitable model for future biomonitoring programs of copper contamination in sandy beaches.

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Determination of copper in liquid and solid insulation for large electrical equipment by ICP-OES. Application to copper contamination assessment in power transformers

Talanta ◽

10.1016/j.talanta.2012.07.009 ◽

2012 ◽

Vol 99 ◽

pp. 703-711 ◽

Cited By ~ 14

Author(s):

Maria Concetta Bruzzoniti ◽

Rosa Maria De Carlo ◽

Corrado Sarzanini ◽

Riccardo Maina ◽

Vander Tumiatti

Keyword(s):

Electrical Equipment ◽

Power Transformers ◽

Icp Oes ◽

Copper Contamination ◽

Contamination Assessment ◽

Determination Of Copper ◽

Solid Insulation

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DIFFERENTIAL RESPONSES OF COPPER(I) AND COPPER(II) ON LIVER COPPER ACCUMULATION IN THE LONG-EVANS CINNAMON (LEC) RATS STUDIED BY PIXE DETERMINATION

International Journal of PIXE ◽

10.1142/s0129083500000213 ◽

2000 ◽

Vol 10 (03n04) ◽

pp. 155-159 ◽

Cited By ~ 1

Author(s):

A. Ohta ◽

G. Bu ◽

T. Matsubayashi ◽

H. Mihara ◽

N. Nemoto ◽

...

Keyword(s):

Early Stage ◽

Copper Accumulation ◽

Body Sway ◽

X Ray ◽

Liver Copper ◽

Supplementation Period ◽

Lec Rats ◽

Long Evans ◽

Determination Of Copper

Effects of supplementation by copper(I) and copper (II) in Long-Evans Cinnamon(LEC) rats and life survival of rats are given. Long-Evans Cinnamon(LEC) strain rats were used at age of 8 weeks. The rats were randomly assigned to either copper(I) chloride or copper (II) chloride group. We have performed x-ray emissivite determination of copper in liver of LEC rats using PIXE and detected increase in copper in liver at early stage which could be supplemented by copper(I) and copper (II). During the supplementation period, clinical deterioration continued accompanied by daily body sway. The rats lost an undetermined amount of body weight and died approximately fourteen days later.

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Ecotoxicity test as an aid in the determination of copper guideline values in soils

Ciência Rural ◽

10.1590/0103-8478cr20180961 ◽

2020 ◽

Vol 50 (6) ◽

Author(s):

Bruna Faria Simões ◽

Nelson Mazur ◽

Maria Elizabeth Fernandes Correia ◽

Júlia Carina Niemeyer ◽

Talita de Santana Matos

Keyword(s):

Chemical Analysis ◽

Preliminary Assessment ◽

Copper Contamination ◽

Ecotoxicity Test ◽

Limit Values ◽

Guideline Values ◽

Ecotoxicity Tests ◽

Determination Of Copper ◽

Reproduction Tests

ABSTRACT: The process of identifying a contaminated area involves a preliminary assessment consisting of chemical analysis and comparison with guideline values. In Brazil, these values are included in the CONAMA Resolution no. 420/2009, based on chemical analysis and phytotoxicity. The objective of this research was to evaluate the ecotoxicity of copper in two natural soils in the state of Rio de Janeiro, a Haplic Planosol (sandy) and a Red-Yellow Argisol (medium texture), to verify if the values established by the legislation offer protection to the soil fauna. Lethality and reproduction tests were performed with Eisenia andrei worms and Folsomia candida springtails. Results indicated copper values in Planosol as LC50 435 mg kg 1 and EC50 29 mg kg 1 for E. Andrei and LC10 137 mg kg 1 and EC50 117 mg kg 1 for F. candida. In Argisol, these results were LC50 690 mg kg 1 and EC50 61 mg kg 1 for E. andrei, and LC10 42 mg kg 1 and EC50 138 mg kg 1 for F. candida. Values reported are lower than the research value (200 mg kg-1) established by the CONAMA resolution 420/09, indicating that concentrations lower than the limit values may affect these organisms, depending on the type of soil. Worms were more sensitive than springtails to copper contamination, and sandy soil was more susceptible to ecotoxicity due to copper contamination, probably due to the greater bioavailability of the metal. Results of such ecotoxicity tests should be considered in the development of soil guideline values.

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