Dissolved Cadmium
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Tilapia (Oreochromis niloticus) as a Biondicator of Copper and Cadmium Toxicity. A Bioavailability Approach
The acute toxicity of copper and cadmium in Oreochromis niloticus was evaluated through a 96 h static assay. Precipitation of Cu and co-precipitation of Cd in the presence of Cu were noted, being indicative of differences in nominal and actual concentrations of metals. Under these conditions, LC50-96h was determined as 3.53 mg L-1Cu, 20.1 mg L-1 Cd and 1.36
J. Braz. Chem. Soc.. Publicado em: 2017-01
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2. Estudo dos metais traço (zinco, cádmio e chumbo) em duas regiões do complexo estuarino-lagunar de Cananéia-Iguape(SP) sob diferentes pressões antrópicas / Trace metals study (zinc, cadmin and lead) in two regions of Cananéia-Iguape (SP) estuarine-lagoon system submitted to different anthropic pressures
Os setores sul e norte do complexo estuarino lagunar de Cananéia-Iguape, sujeitos a diferentes pressões antrópicas, foram estudados quanto às características hidrológicas e hidroquímicas das águas de superfície e fundo, com ênfase às concentrações de zinco, cádmio e chumbo dissolvidos. A amostragem contou com coletas espaciais e temporais, em d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/10/2009
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3. Estudos dos aspectos qualitativos e quantitativos da água e do sedimento no baixo curso do Rio Pitimbu (RN)
Urban growth of metropolitan areas has produced impacts of considerable importance on environment and water resources. Such impacts are in general associated with human activities, such as basin area uncontrolled development. In this context, Pitimbu river watershed, located at Natal metropolitan area, has been affected by uncontrolled development caused by
Publicado em: 2009
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4. Comparação dos índices de qualidade da água e usos do fator contaminação e índice de geoacumulação para os sedimentos da microbacia do arroio João Corrêa, São Leopoldo, RS, Brasil
The João Corrêa creek, with 7 km length and a 9.7 km2 micro basin (MbaJC), has its main source into the forested hilly landscape of Sapucaia county and flows trough out the São Leopoldo city, receiving along his course several urban wastes and industrial effluents. Looking for a quantified evaluation of environmental impacts related to human activities, m
Publicado em: 2008
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5. Heterogeneidade espacial e a qualidade das águas superficiais do Reservatório Guarapiranga (São Paulo-SP-Brasil) / Spatial heterogeneity and water quality of superficial water at the Guarapiranga reservoir (São Paulo-SP- Brazil)
Environmental heterogeneity studies are of great importance in ecology, once it interferes on ecosystems structure and working. Water reservoirs in particular are artificial ecosystems with high spatial and temporal heterogeneity. To test the hypothesis of existence of a pattern of longitudinal heterogeneity, and discuss water quality according to CONAMA 357
Publicado em: 2008
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6. Variação da qualidade da água do escoamento superficial de duas bacias de drenagem de Natal/RN - Brasil
The urban drainage is one of the powers of environmental sanitation and its scope is the quantitative and qualitative aspects. In decision making of managers and the engineering aspects of design are almost always taken into account only the quantitative aspects. However, the waters of the runoff have the highest concentrations of pollutants at the beginning
Publicado em: 2008
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7. Recuperação de cádmio de baterias níquel-cádmio via extração seletiva com tributilfosfato (TBP)
This work describes a recovery process of cadmium from spent nickel-cadmium batteries by a new hydrometallurgical route based on the selective extraction in hydrochloric acid medium with tributylphosphate (TBP), alone or dissolved in kerosene. The best results were obtained when TBP concentration was at least 75 vol%. Nickel extraction was negligible under t
Química Nova. Publicado em: 2007-06
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8. Estudo comparativo das caracterÃsticas dos lÃquidos percolados gerados no Aterro Metropolitano â PB e no Aterro da Muribeca â PE
The way of final disposition used for homely urban solid waste in Brazil and throughout the world has been sanitary embankment, which can be applied for both small and big communities. It is important to mention in this method, the treatment of the liquids that are not generated inside the heap of refuse, named leachate, which produces the percolate when mix
Publicado em: 2006
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9. EXCHANGEABILITY AND FORMATION CONSTANTS OF COPPER, ZINC AND CADMIUM WITH HUMIC SUBSTANCES AT INDIGENOUS CONCENTRATIONS
A series of laboratory experiments and modeling investigations studied the exchangeability and the formation constants of trace metals with water-soluble humic substances at environmentally realistic concentrations. Copper (Cu2+), zinc (Zn2+), and cadmium (Cd2+) were the studied trace metals. These metals have different affinities for the binding sites of hu
Publicado em: 2001
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10. Caracterização de Efluente Têxtil e Proposta de Tratamento
Textile industry deals with a high diversity of processes and generation of wastewaters with a high content of pollutant material. Before being disposed of in water bodies, a pre-treatment of the effluent is carried out, which is sometimes ineffective. In order to be properly treated, physical and chemical properties of the effluent must be known, as well as
Publicado em: 2000