Influência de efluentes têxteis e alimentícios sobre o metabolismo e propriedades físicas e químicas do rio Piauitinga (Sergipe)

Andrade, Rayle Monteiro; Souza, Marcelo Friederichs Landim de; Couto, Erminda da Conceição Guerreiro

doi:10.1590/s0100-40421998000400009

Cited by 8 publications

(10 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A detailed characterization of the organic industrial effluents and estimate of the influence in water chemistry and metabolism are given in Andrade et al (1998).…”

Section: Study Areamentioning

confidence: 99%

Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)

Souza

Couto

1999

Rev. Bras. Biol.

View full text Add to dashboard Cite

Net pelagic metabolism (NPM) and net ecosystem metabolism (NEM) were assessed by ΣCO 2 changes in three sampling stations along Piauí River estuary. At the upper estuary station, sampling was carried out over 48 h. Samples exhibited high DIN:DIP ratios. Chlorophyll-a ranged from 0.2 to 2.5 µg.l . Bottom ressuspension due to microphytobenthic flotation and a high turbidity plume inside de estuary reflected in negative metabolic rates (mineralization). Benthic metabolism was inferred by net system minus pelagic metabolism. Microphytobenthic community seems to be the main responsible for system metabolism, specially in the upper estuary, although the anthropogenic inputs exert strong long term influence.Key words: estuary, short-term changes, primary production, mineralization, microphytobenthos. RESUMO

show abstract

“…A detailed characterization of the organic industrial effluents and estimate of the influence in water chemistry and metabolism are given in Andrade et al (1998).…”

Section: Study Areamentioning

confidence: 99%

Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)

Souza

Couto

1999

Rev. Bras. Biol.

View full text Add to dashboard Cite

show abstract

“…The upper estuary receives wastewater discharges from domestic sources, textile industries, and juice and food processing industries located in the city of Estancia. 34,35 Surface water samples were collected during periods of both low and high tides, at eight sites distributed along the estuary ( Figure S1). Polyethylene receptacles were used, and the samples were stored in ice in the dark, until arrival at the laboratory.…”

Section: Sampling Proceduresmentioning

confidence: 99%

Characterization of dissolved organic matter in the Piauí river estuary, Northeast Brazil

Costa¹,

Passos²,

Garcia³

et al. 2011

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

A espectroscopia de fluorescência e o carbono orgânico dissolvido (COD) foram utilizados para caracterização da matéria orgânica dissolvida (MOD) no estuário do Rio Piauí, um estuário tropical situado no Estado de Sergipe, nordeste do Brasil. As intensidades de fluorescência foram maiores no período chuvoso e menores no período seco, evidenciando que a variabilidade das propriedades fluorescentes da MOD é ditada, principalmente, pela descarga fluvial e pelo processo de diluição no estuário. No período chuvoso, os compostos tipo triptofano e húmicos predominaram na composição da MOD, enquanto no período seco ocorreu um aumento significativo dos constituintes tipo proteínas. As relações das intensidades de fluorescência com a salinidade sugerem um comportamento não conservativo para a MOD fluorescente. O COD mostrou um comportamento conservativo no período seco e não conservativo no período chuvoso, com produção de COD na parte superior do estuário. A complexação da MOD com o Cu(II), estudada usando a técnica de supressão da fluorescência, evidenciou o potencial de complexação dos fluoróforos tipo proteínas, tripofano e húmico.Fluorescence spectroscopy and dissolved organic carbon (DOC) measurements were used to characterize the dissolved organic matter (DOM) in the Piauí River estuary, a tropical estuary situated in the State of Sergipe, Northeast Brazil. Fluorescence intensities were greater during the rainy period than the dry period, demonstrating that variability in the fluorescence properties of the DOM was determined mainly by the fluvial discharge and the dilution processes occurring in the estuary. During the rainy period, tryptophan-like and humic substances were the main components of the DOM, while during the dry period there was a significant increase of proteinlike constituents. Relationships identified between fluorescence intensities and salinity were indicative of non-conservative behavior of the fluorescent DOM. DOC showed behavior that was conservative during the dry period, and non-conservative during the rainy period, with production of DOC in the upper reaches of the estuary. The complexation of DOM with Cu(II), studied using the fluorescence suppression technique, showed the complexation potentials of protein, tryptophan and humic type fluorophores.Keywords: natural organic matter, Piauí River, estuary, fluorescence IntroductionDissolved organic matter (DOM) is a complex heterogeneous mixture of macromolecules formed by the decomposition of biological material derived from animals or plants. DOM represents one of the main reservoirs of carbon on the Earth's surface, and exhibits a variety of ecologically and geochemically important properties including the ability to absorb light, bind with trace metals and organic pollutants, adsorb substances onto its surface and undergo aggregation, as well as photochemical reactivity. [1][2][3] The DOM present in natural waters can have either autochtone or allochtone origins. Allochtone organic matter is introduced into aquatic systems by leaching from ...

show abstract

“…Os efluentes das indústrias alimentícias, devido às grandes concentrações de matéria orgânica e às suas usualmente fortes colorações (Andrade, Souza & Couto, 1998), são importantes fontes de poluição dos corpos d'água (Nadais, Capela & Arroja, 2005), podendo provocar alterações na biota aquática, principalmente nas imediações da descarga.Os rejeitos de indús-trias alimentícias, além do forte caráter ácido ou básico, apresentam grande concentração de sólidos orgânicos em suspensão. Essa elevada carga orgânica provoca, em muitos casos, depleção do oxigênio dissolvido e modificações na comunidade biológica (Andrade, Souza & Couto, 1998).…”

Section: Introductionunclassified

“…Essa elevada carga orgânica provoca, em muitos casos, depleção do oxigênio dissolvido e modificações na comunidade biológica (Andrade, Souza & Couto, 1998). Além disso, a forte coloração acarreta alterações na biota aquática dos leitos receptores desses resíduos.…”

Section: Introductionunclassified

Avaliação da degradação do corante vermelho bordeaux através de processo fotoquímico

Silva¹,

Marmitt²,

Haetinger

et al. 2008

Eng. Sanit. Ambient.

View full text Add to dashboard Cite

Neste trabalho foi realizado o estudo da degradação fotoquímica do corante vermelho bordeaux. O estudo objetivou a avaliação de tratamentos alternativos com vistas à aplicação de tecnologias limpas. Os experimentos de fotodegradação foram realizados através da incidência de radiação UV em um compartimento contendo o corante (solução). O tratamento fotoquímico reduziu em 99% a coloração e a concentração da solução contendo o corante vermelho bordeaux. PALAVRAS-CHAVE:Amaranto, corantes azo, corantes alimentícios. ABSTRACT This paper studied the photochemical degradation of food dye (red dye). The investigation aimed at the assessment of alternative treatments, focusing the use of clean technologies. The photochemical degradation experiments were performed in a compartment with UV radiation (mercury lamp -250W).The photochemical treatment showed a 99% color and concentration reduction in the dye solution.

show abstract

Influência de efluentes têxteis e alimentícios sobre o metabolismo e propriedades físicas e químicas do rio Piauitinga (Sergipe)

Cited by 8 publications

References 5 publications

Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)

Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)

Characterization of dissolved organic matter in the Piauí river estuary, Northeast Brazil

Avaliação da degradação do corante vermelho bordeaux através de processo fotoquímico

Contact Info

Product

Resources

About