Preliminary assessment of the contamination of the marine water and fish by trace metals in Cotonou (Benin)

2011 ◽  
Vol 15 (1) ◽  
Author(s):  
AP Edorh ◽  
E Montcho ◽  
K Gnandi ◽  
P Guédénon ◽  
L Koumolou ◽  
...  
Keyword(s):  
Trace Metals ◽  
Marine Water ◽  
Preliminary Assessment

A review of marine water sampling methods for trace metals

2020 ◽  
Vol 21 (3-4) ◽  
pp. 267-290 ◽  
Author(s):  
A. E. Noble ◽  
C. B. Tuit ◽  
J. P. Maney ◽  
A. D. Wait
Keyword(s):  
Trace Metals ◽  
Sampling Methods ◽  
Marine Water ◽  
Water Sampling

scholarly journals Avaliação Preliminar da Presença de Metais Traço, nas Águas do Riacho Mussuré e o Córrego de Mumbaba – João Pessoa – PB (Preliminary Assessment of the Presence of Trace Metals in the Waters of the Stream Mussuré and Creek Mumbaba - João Pessoa)

2014 ◽  
Vol 7 (4) ◽  
pp. 668
Author(s):  
Maria Leonia Pessoa ◽  
Jose Dantas Neto
Keyword(s):  
Water Quality ◽  
Trace Metals ◽  
Industrial Effluent ◽  
Quality Data ◽  
Chemical Parameters ◽  
Preliminary Assessment ◽  
Total Chromium ◽  
Water Quality Data ◽  
Quality Water

Este estudo teve como objetivo analisar a qualidade da água do córrego Mumbaba e o riacho Mussuré por meios de parâmetros físico-químicos; dando ênfase a presença de concentração de metais pesados nas águas, a fim de fornecer subsídios aos gestores ambientais na tomada de decisões. Para tanto, delimitou-se como área de estudo a bacia do riacho Mussuré, que está inserida na bacia do rio Gramame, no estado da Paraíba. E o Córrego localizado na comunidade Mumbaba no sudoeste do Município de João Pessoa – PB. Cinco pontos amostrais foram estabelecidos e as variáveis medidas foram temperatura, pH, condutividade elétrica, turbidez, oxigênio dissolvido, nitrato, nitrito, nitrogênio amoniacal e fósforo. Foram constatadas diversas alterações na qualidade da água do riacho Mussuré e o córrego, ao longo de todo seu curso. Os teores de OD estavam muito abaixo do limite estabelecido pela Resolução 357/05 para a classe 3 (4,0 mgL-1), nas cinco estações monitoradas. A estação situada aproximadamente na metade do curso do riacho apresentou os maiores valores de turbidez, e a pior qualidade da água através do uso dos dois índices citados, fato que se deve ao lançamento de efluentes industriais a montante desta estação. Com relação aos metais, as concentrações de cromo total, chumbo, níquel, cádmio, cobre e mercúrio em todos os pontos analisados permaneceram abaixo do limite estabelecido pela resolução nº 357/2005 do CONAMA. Pelos resultados encontrados conclui-se que o riacho Mussuré, e o córrego apresenta alto grau de degradação e suas águas representam um risco para a saúde da população usuária.  Preliminary Assessment of the Presence of Trace Metals in the Waters of the Stream Mussuré and Creek Mumbaba - João Pessoa A B S T R A C T The aim of this work was to evaluate the water quality of the stream Mussuré and creek Mumbaba by means of physico-chemical parameters: emphasizing the presence of heavy metals concentration in water in order to provide information to environmental managers in making decisions. So, we delineated the study area as the basin of the creek Mussuré , which is embedded in the Gramame River basin in the state of Paraíba . And the community Mumbaba located in the southwest of the city of João Pessoa - PB . The methodology consisted in the analysis of water quality data . The data relating to physical , chemical parameters were analyzed over five sampling stations . Several changes were observed in the water quality of the stream and creek Mussuré , throughout its course . The levels of DO were well below the limit established by CONAMA Resolution 357 / 05 for Class 3 ( 4.0 mg / L ) in five stations monitored . The station located about halfway through the course of the creek had the highest turbidity values ​​, and the lowest water quality through the use of two indices mentioned, a fact that is due to industrial effluent discharge upstream of this station . As for metals, concentrations of total chromium, lead, nickel and copper in the stream Mussuré station (MS01A) showed values above the limit established by CONAMA Resolution 357/2005. The results it is concluded that the creek Mussuré , and the stream has a high degree of degradation and its waters pose a risk to the health of the user population . Keywords: water quality, water pollution, environmental impacts, Industrial core

Investigating lethal and sublethal effects of the trace metals cadmium, cobalt, lead, nickel and zinc on the anemone Aiptasia pulchella, a cnidarian representative for ecotoxicology in tropical marine environments

2014 ◽  
Vol 65 (6) ◽  
pp. 551 ◽  
Author(s):  
Pelli L. Howe ◽  
Amanda J. Reichelt-Brushett ◽  
Malcolm W. Clark
Keyword(s):  
Trace Metals ◽  
Marine Invertebrates ◽  
Sublethal Effects ◽  
Test Organism ◽  
Toxicity Tests ◽  
Preliminary Assessment ◽  
Aiptasia Pulchella ◽  
Baseline Information ◽  
Subtropical Oceans ◽  
Lead Nickel

The zooxanthellate sea anemone Aiptasia pulchella is found throughout the tropical and subtropical oceans of the Indo-Pacific and is easily maintained in aquaria, posing potential suitability as a standard tropical marine test organism for use in ecotoxicology. To gain an understanding of the sensitivity of A. pulchella to trace metals, 96-h static-renewal toxicity tests were conducted. Values of 96-h LC50 between 946 and 1196 µg L–1 were estimated for cadmium, between 595 and 1146 µg L–1 for zinc, 8060 and 12 352 µg L–1 for lead and 2209 and 5751 µg L–1 for nickel. In addition, preliminary assessment of rapid tentacle retraction was made. Six-hour EC50 values of 355 and 979 µg L–1 for cadmium, between 384 and 493 µg L–1 for zinc, between 2340 and 2584 µg L–1 for nickel, and 2610 µg L–1 for lead, were estimated for ‘severe’ tentacle retraction. Cobalt concentrations up to 1547 µg L–1 caused extreme zooxanthellae loss, but no more than 10% mortality and no rapid ‘severe’ tentacle retraction. The present study has provided important baseline information, enabling comparison of the acute sensitivity of A. pulchella to trace metals with other marine invertebrates, and guiding the development of sublethal endpoints.

Hydrocarbons and trace metals in mussels in the Macaé coast: Preliminary assessment for a coastal zone under influence of offshore oil field exploration in southeastern Brazil

2016 ◽  
Vol 103 (1-2) ◽  
pp. 349-353 ◽  
Author(s):  
Igor U. Santiago ◽  
Mauricio M. Molisani ◽  
Adriana H. Nudi ◽  
Artur L. Scofield ◽  
Angela de L.R. Wagener ◽  
...  
Keyword(s):  
Trace Metals ◽  
Coastal Zone ◽  
Oil Field ◽  
Southeastern Brazil ◽  
Preliminary Assessment ◽  
Offshore Oil

scholarly journals Analysis of trace metals Cu2+, Pb2+ and Zn2+ in coastal marine water samples from Florianópolis, Santa Catarina State, Brazil

2005 ◽  
Vol 16 (3a) ◽  
pp. 308-315 ◽  
Author(s):  
Lígia C. Mello ◽  
Alessandro Claudino ◽  
Ivanise Rizzatti ◽  
Rodolfo L. Bortoluzzi ◽  
Dilson R. Zanette
Keyword(s):  
Trace Metals ◽  
Water Samples ◽  
Marine Water ◽  
Santa Catarina ◽  
Coastal Marine ◽  
Santa Catarina State

XRF and PIXE Analysis of light and Dark Adapted Ocular Tissue

1982 ◽  
Vol 40 ◽  
pp. 190-191
Author(s):  
B. J. Panessa ◽  
H. W. Kraner ◽  
J. B. Warren ◽  
K. W. Jones
Keyword(s):  
Trace Metals ◽  
Pigment Epithelium ◽  
Nerve Impulse ◽  
Light Response ◽  
Ocular Tissue ◽  
Emission Spectrometry ◽  
Retinol Dehydrogenase ◽  
Pixe Analysis ◽  
X Ray ◽  
Optimal Function

During photoexcitation the retina requires specific electrolytes and trace metals for optimal function (Na, Mg, Cl, K, Ca, S, P, Cu and Zn). According to Hagins (1981), photoexcitation and generation of a nerve impulse involves the movement of Ca from the rhodopsin-ladened membranes of the rod outer segment (ROS) to the plasmalemma, which in turn decreases the in-flow of Na into the photoreceptor, resulting in hyperpolarization. In toad isolated retinas, the presence of Ba has been found to increase the amplitude and prolong the delay of the light response (Brown and Flaming, 1978). Trace metals such as Cu, Zn and Se are essential for the activity of the metalloenzymes of the retina and retina pigment epithelium (RPE) (i.e. carbonic anhydrase, retinol dehydrogenase, tyrosinase, glutathione peroxidase, superoxide dismutase...). Therefore the content and fluctuations of these elements in the retina and choroid are of fundamental importance for the maintenance of vision. This paper presents elemental data from light and dark adapted frog ocular tissues examined by electron beam induced x-ray microanalysis, x-ray fluorescence spectrometry (XRF) and proton induced x-ray emission spectrometry (PIXE).

Identifying Sources of Sulfate Aerosols Reaching Whiteface Mountain, NY

1985 ◽  
Vol 43 ◽  
pp. 98-101
Author(s):  
James S. Webber
Keyword(s):  
Trace Metals ◽  
Acid Deposition ◽  
Surface Waters ◽  
Dry Deposition ◽  
Coal Combustion ◽  
Public Awareness ◽  
Sulfate Aerosols ◽  
Wet And Dry Deposition ◽  
Whiteface Mountain ◽  
Toxic Trace Metals

INTRODUCTION“Acid rain” and “acid deposition” are terms no longer confined to the lexicon of atmospheric scientists and 1imnologists. Public awareness of and concern over this phenomenon, particularly as it affects acid-sensitive regions of North America, have increased dramatically in the last five years. Temperate ecosystems are suffering from decreased pH caused by acid deposition. Human health may be directly affected by respirable sulfates and by the increased solubility of toxic trace metals in acidified waters. Even man's monuments are deteriorating as airborne acids etch metal and stone features.Sulfates account for about two thirds of airborne acids with wet and dry deposition contributing equally to acids reaching surface waters or ground. The industrial Midwest is widely assumed to be the source of most sulfates reaching the acid-sensitive Northeast since S02 emitted as a byproduct of coal combustion in the Midwest dwarfs S02 emitted from all sources in the Northeast.

Procedure for Maximizing Phonological Information from Single-Word Responses

1984 ◽  
Vol 15 (4) ◽  
pp. 267-274 ◽  
Author(s):  
Harriet B. Klein
Keyword(s):  
Phonological Information ◽  
Single Word ◽  
Preliminary Assessment ◽  
Target Attainment ◽  
Phonological Processes ◽  
Step Procedure ◽  
Yield Information ◽  
Assessment Measure ◽  
Busy Clinician ◽  
Planning Intervention

Formal articulation test responses are often used by the busy clinician as a basis for planning intervention goals. This article describes a 6-step procedure for using efficiently the single-word responses elicited with an articulation test. This procedure involves the assessment of all consonants within a word rather than only test-target consonants. Responses are organized within a Model and Replica chart to yield information about an individual's (a) articulation ability, (b) frequency of target attainment, substitutions, and deletions, (c) variability in production, and (d) phonological processes. This procedure is recommended as a preliminary assessment measure. It is advised that more detailed analysis of continuous speech be undertaken in conjunction with early treatment sessions.

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