A.A. Mozeto

Universidade Federal de São Carlos

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Marcos Roberto Lopes do Nascimento

Federal Center for Technological Education of Minas Gerais

Alex V. Krusche

Universidade de São Paulo

T.Á. DelValls

Universidade Santa Cecília

P. Fritz

University of Oslo

Camilo Dias Seabra Pereira

Universidade Santa Cecília

F Cavalheiro

Universidade de São Paulo

Augusto César

Universidade Federal de São Paulo

Ariane Loudemila Silva de Albuquerque

Universidade Estadual de Alagoas

Rodrigo Brasil Choueri

Universidade Federal de São Paulo

Patrícia Ferreira Silvério

Universidade Federal de São Carlos

Cooperative Institutions

Universidade de São Paulo

Universidade Federal de São Carlos

Universidade Santa Cecília

National Nuclear Energy Commission

Universidad de Cádiz

Universidade Federal de São Paulo

Brazilian Agricultural Research Corporation

Methodist University of Piracicaba

Departamento de Ciência e Tecnologia

Secretaria de Agricultura e Abastecimento

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Ecotoxicological risks of calcium nitrate exposure to freshwater tropical organisms: Laboratory and field experiments

Ecotoxicology and Environmental Safety (2015)

Ana Paula Erbetta Sueitt Thais M. Yamada-Ferraz Aline Fernandes de Oliveira Clarice Maria Rispoli Botta Pedro S. Fadini

Mesocosm

Biota

Calcium nitrate

10.1016/j.ecoenv.2015.03.034

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Citations (16)

PLANNING DEVELOPMENT (SOIL USE) OF THE JATAÍ ECOLOGICAL STATION

Oecologia Australis (1995)

Maria Victória Ramos Ballester José Eduardo dos Santos Eliana Garcia Feresin A A Obara Alex V. Krusche

10.4257/6

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Citations (0)

Assessment of the acute toxicity of eutrophic sediments after the addition of calcium nitrate (Ibirité reservoir, Minas Gerais-SE Brazil): initial laboratory experiments

Brazilian Journal of Biology (2011)

Helena Janke TM. Yamada DAS. Beraldo CMR. Botta MRL. Nascimento

This study evaluated the acute toxicity of sediment in a eutrophic reservoir after remediation with a calcium nitrate solution to retain phosphorus. The study involved microcosms of surface sediments and water from the sediment-water interface in the Ibirité reservoir. This reservoir, located in the vicinity of metropolitan Belo Horizonte (Minas Gerais, SE Brazil), is a water body that receives treated effluents from an oil refinery (REGAP-Petrobras), as well as high loads of untreated urban effluents from the city of Ibirité and surrounding areas and industrial effluents from a major industrial park. Incubation times of the treatment experiments were: t = 0, t = 5, t = 10, t = 25, t = 50, t = 85 and t = 135 days. One control microcosm and three treated microcosms were analysed in each time interval. Acute toxicity of water samples was assessed with Ceriodaphnia silvestrii Daday, 1902 and that of bulk sediment samples with Chironomus xanthus Rempel, 1939. Toxicity tests were carried out concomitantly with chemical analyses of dissolved inorganic nitrogen species (ammonia, nitrate and nitrite), sulfate and metals in the water samples of the microcosms. Acid volatile sulfides (AVS), simultaneously extracted metal (SEM) and potentially bioavailable metal were analyzed in bulk sediment samples. Neither of the tested organisms showed toxicity in the control microcosm samples. The water column of the treated microcosm showed toxicity to C. silvestrii, starting at t = 10 days, while the sediment pore water toxicity started at t = 0 day. However, toxicity was found to decline from t = 85 days to t = 135 days. Sediments showed toxicity to C. xanthus during the entire experiment, except at the longest incubation time (t = 135 days). The overall results indicate that nitrate, which reached concentrations exceeding 1,200 mg N-NO3- L-1 in the sediment pore water of the treated microcosms, was most probably responsible for the toxicity of the samples. Although the calcium nitrate technology proved effective in retaining phosphorus, promoting sediment oxidation via denitrification, from the ecotoxicological standpoint and under the experimental conditions of this study, the application of nitrate for remediation of the sediments in the Ibirité reservoir did not prove effective up to a period of 135 days of incubation. However, we presume that after longer periods of incubation, treated sediments may recover their ability to sustain a benthic community. More advanced experiments are planned involving longer incubation times, thus extending the denitrification process, which may lead to a higher phosphorus retention capacity and to more complete abatement of sediment toxicity.

Microcosm

Ceriodaphnia dubia

10.1590/s1519-69842011000500011

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Citations (17)

The fate of trace metals in suspended matter in a mangrove creek during a tidal cycle

The Science of The Total Environment (1988)

Luiz Drude de Lacerda Luiz Antônio Martinelli Carlos Eduardo de Rezende A.A. Mozeto A. R. C. Ovalle

Detritus

Trace metal

Annual cycle

Carbon fibers

10.1016/0048-9697(88)90030-7

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Citations (101)

C3 and c4 grasses distribution along soil moisture gradient in surrounding areas of the lobo dam (sao paulo, brazil)

Anais da Academia Brasileira de Ciências (1996)

A.A. Mozeto F.M.B Nogueira Souza Mhaoe R. L. Victória

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Citations (3)

DESENVOLVIMENTO PLANEJADO (UTILIZAÇÃO DO SOLO) DA ESTAÇÃO ECOLÓGICA DE JATAÍ

Oecologia Brasiliensis (1995)

Maria Victória Ramos Ballester José Eduardo Santos Eliana Garcia Feresin A A Obara Alex V. Krusche

Normal 0 21 false false false MicrosoftInternetExplorer4 st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} This study describes the use of a Geographic Information System (GIS)-IDRISI - as a tool for the environmental management at the Jatai Ecological Station, Sao Paulo, Brazil. The system enables the conversion of data, such as land use patterns, vegetal cover, hidrology, and altimetry to digital images. These digital thematic maps are further analysed and processed in a microcomputer generating valuable informations about the physical characteristics of specific ecosystems, such as terrestrial, aquatic and wetlands, within the ecological station. The set of images forms a basis for planning and development of strategies of ecosystems management, environmental education programs and conservation.

Thematic map

10.4257/oeco.1995.0101.27

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Citations (2)

Experimental observations on carbon isotope exchange in carbonate-water systems

Geochimica et Cosmochimica Acta (1984)

A.A. Mozeto P. Fritz Eric J. Reardon

Recrystallization (geology)

Carbon fibers

Reaction rate

10.1016/0016-7037(84)90277-1

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Citations (54)

Interações químicas do sulfato e carbonato de cálcio em seis solos paulistas sob vegetação de cerrado.

Revista Brasileira de Ciência do Solo (1990)

Ana Rita A. Nogueira A.A. Mozeto

Interacoes quimicas do solo na aplicacao de CaSO4.2H2O. Sulfato e carbonato de calcio em seis solos paulistas sob vegetacao de Cerrado.

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Citations (13)

Release, bioavailability and toxicity of metals in lacustrine sediments: A case study of reservoirs and lakes in Southeast Brazil

Aquatic Ecosystem Health & Management (2005)

Patrícia Ferreira Silvério Ana Lúcia Fonseca Clarice M. R. Botta-Paschoal A.A. Mozeto

Bioavailability and toxicity of metals in sediment were assessed in three water bodies in the State of São Paulo, SE Brazil, in one of the first investigations of the topic in the country. Weakly bound metals in bulk sediment samples taken from a highly-polluted reservoir, Billings, São Paulo, exhibited enrichment factors from 2.4 to 30 fold, compared to two other water bodies in the study, Barra Bonita Reservoir and Diogo Lake. High mortality rates occurred when Hyalella azteca and Ceriodaphnia dubia were exposed to Billings reservoir sediment. After forty-eight days of sediment oxidation, laboratory microcosms showed increases in the weakly-bound fraction of metals in sediments from Billings Reservoir (all metals), Diogo Lake (all metals except Zinc) and Barra Bonita Reservoir (Cadmium and Lead only). Chironomus xanthus was not sensitive to toxicity in sediment from any of the three environments. Ceriodaphnia dubia was sensitive to chronic toxicity in bulk field sediments from all three environments, and showed an increase in mortality rate in tests with oxidized sediment. Billings sediment, with or without aeration, caused 100 percent mortality, while in contact with Barra Bonita field sediment, a mortality of 10 percent of the adult organisms occurred, increasing up to 80 percent in post-aeration sediments. In Diogo Lake sediment, 30 percent mortality was observed in field or pre-aeration sediment rising to up to 60 percent in post aeration sediments. The two factors caused by oxidation of reduced substances in sediments, a fall in pH in the water and mobilization of bound metal, are invoked to explain this response.

Ceriodaphnia dubia

Microcosm

Hyalella azteca

10.1080/14634980500234735

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Citations (23)

Monitoring coastal water ecological status through early signals of biological effects — an integrated approach

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology (2010)

Camilo Dias Seabra Pereira Augusto César Rodrigo Brasil Choueri M. G. M. Catharino Satie Taniguchi

10.1016/j.cbpa.2010.06.043

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