scholarly journals The Role of the Humic Substances in the Fractioning of Heavy Metals in Rodrigo de Freitas Lagoon, Rio de Janeiro - Brazil

2013 ◽  
Vol 85 (4) ◽  
pp. 1289-1301 ◽  
Author(s):  
ESTEFAN M. DA FONSECA ◽  
JOSE A. BAPTISTA NETO ◽  
JOHN MCALISTER ◽  
BERNARD SMITH ◽  
MARCOS A. FERNANDEZ ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Rio De Janeiro ◽  
Water Soluble ◽  
Metal Partitioning ◽  
Fine Grain ◽  
Soluble Phase ◽  
The City ◽  
South Zone

One of the main results of the processes related to urbanization is the contamination of the adjacent water bodies. Inserted in this context, the Rodrigo de Freitas lagoon is situated in the south zone of the city of Rio de Janeiro. This ecosystem receives several inputs containing all sorts of pollutants, including heavy metals. The present work aimed to study the partitioning of heavy metals in the sediments of Rodrigo de Freitas and the influence of organic matter in this fractionation dynamic. The results of these analyses presented the contents of organic matter as an important metal-capturing agent. Fractionation of organic matter resulted in a predominance of humine. Heavy metal partitioning showed that the metals bound by the water-soluble phase have no significant concentrations. Special features such as, reducing sediment, high levels of organic matter and fine grain size have transformed this ecosystem in an effective deposit of pollutants, where heavy metals are not available in easily reactive fractions.

Impact of Heavy Metals on Benthic Oligochaete Communities in the River Ill and Its Tributaries

1994 ◽  
Vol 29 (3) ◽  
pp. 241-248 ◽  
Author(s):  
A. Rosso ◽  
M. Lafont ◽  
A. Exinger
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Matter ◽  
Reproductive Strategy ◽  
Organic Micropollutants ◽  
Rhine Basin ◽  
Metal Contents ◽  
The Impact ◽  
The City

The aim of this research is to describe the impact of heavy metals contaminating sediments on oligochaete communities. Sediments were collected three times (June, August, October 1991) for chemical and biological analyses in 15 sites situated in the river I11 and its tributaries (Rhine Basin, France). The sediments are characterized by high contents of heavy metals, mainly Hg, Cu, Cr, Pb, Zn from below the city of Mulhouse. The majority of sediments are heavily loaded with organic matter and organic micropollutants are also present. Oligochaete communities are rich in species. However five species only, considered as pollution-tolerant or opportunist, are significantly present and abundant. The percentages of Tubificidae without hair setae are positively related to heavy metal contents of the sediments, and the percentages of Tubificidae with hair setae are negatively related. Several species such as N. communis, N. barbata, D. digitata and Bothrioneurum sp. are considered as tolerant to heavy metals; on the contrary L. claparedeanus, L. udekemianus, Stylodrilus sp. and S. josinae are considered as intolerant. The reproductive strategy of oligochaetes in contaminated areas and the role of organic matter are discussed. Several recommendations are given for the rehabilitation of the investigated sites.

The impact of urban effluents on the coastal marine environment of Mediterranean islands

1995 ◽  
Vol 32 (9-10) ◽  
pp. 85-94 ◽  
Author(s):  
Michael O. Angelidis
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Marine Environment ◽  
Suspended Particle ◽  
Pollution Source ◽  
Mediterranean Islands ◽  
Coastal Marine Environment ◽  
Coastal Marine ◽  
The Impact ◽  
The City

The impact of the urban effluents of Mytilene (Lesvos island, Greece) on the receiving coastal marine environment, was evaluated by studying the quality of the city effluents (BOD5, COD, SS, heavy metals) and the marine sediments (grain size, organic matter, heavy metals). It was found that the urban effluents of Mytilene contain high organic matter and suspended particle load because of septage discharge into the sewerage network. Furthermore, although the city does not host important industrial activity, its effluents contain appreciable metal load, which is mainly associated with the particulate phase. The city effluents are discharged into the coastal marine environment and their colloidal and particulate matter after flocculation settles to the bottom, where is incorporated into the sediments. Over the years, the accumulation of organic matter and metals into the harbour mud has created a non-point pollution source in the relatively non-polluted coastal marine environment of the island. Copper and Zn were the metals which presented the higher enrichment in the sediments of the inner harbour of Mytilene.

scholarly journals Carbon and Metal(loid)s in Parkland and Road Verge Surface Soils in the City of Liverpool, UK

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 335 ◽  
Author(s):  
Luke Beesley ◽  
Eduardo Moreno-Jiménez ◽  
Phil Jenn ◽  
Nicholas W. Lepp
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Urban Soils ◽  
Public Spaces ◽  
Soil Survey ◽  
Water Soluble ◽  
Surface Soils ◽  
Road Verge ◽  
C Storage ◽  
The City

Urban soils are at the interface between land and people and provide a wide variety of important ecosystem services to highly populous areas. The aims of this soil survey were (1) to measure the bulk density, carbon (C) storage and pH of surface soils (0–15 cm depth) from public spaces (parks and road verges) in the city of Liverpool, UK, and (2) to determine the likely impact of these master variables on heavy metal concentrations (As, Cd, Cu, Pb and Zn). The bulk densities and organic matter contents varied considerably in the predominantly sandy textured soils within the city boundary, resulting in diverse C densities from 1–10 kg C m2. Organic carbon formed the majority of the labile, water-soluble and extractable C pool in these soils, a fact not easily elucidated from their organic matter or C content alone. The copper and lead concentrations in the sampled soils were correlated with organic matter and organic carbon in water-extracts. Cadmium and zinc appeared to be dependent only on soil pH, whilst arsenic was related positively to organic matter, but negatively to pH. Interrelationships, and hence synonymous distributions, of all metal(loid)s existed, but were strongest between Cu and As, and Cu and Pb. These results suggest that the diverse bulk densities, and hence carbon storage, of the urban soils surveyed influenced the dispersal of metals and arsenic.

scholarly journals Construindo o Projeto Cuidadosamente: reflexão sobre a saúde mental dos graduandos de Enfermagem frente ao COVID-19

2020 ◽  
Vol 10 (1) ◽  
pp. 13
Author(s):  
Natália Loureiro Rocha ◽  
Alcilea Barbosa de Andrade Sora ◽  
Alessandra Da Terra Lapa ◽  
Daniele Durval Dos Santos
Keyword(s):  
Nursing Students ◽  
Social Isolation ◽  
Rio De Janeiro ◽  
Private University ◽  
Support Network ◽  
Levels Of Care ◽  
Current Context ◽  
The City ◽  
Different Levels

O presente relato de experiência visa destacar a vivência dos autores na construção do Projeto Cuidadosamente em uma universidade privada localizada no município do Rio de Janeiro. Objetiva-se com esse estudo apontar a sua inserção prática, bem como, retratar a importância de um projeto desta magnitude no cuidado à saúde psíquica dos acadêmicos de enfermagem, principalmente no contexto atual de isolamento social pela pandemia de COVID-19. Conclui-se que a ação possibilita a construção de uma rede de apoio entre os próprios colegas de classe que estão experenciando as mesmas dificuldades com esse isolamento social e ameniza situações que possam maximizar ou desencadear algum tipo de transtorno mental, a exemplo de ansiedade e depressão, através de uma escuta qualificada, que é atribuição importante do enfermeiro nos diferentes níveis de assistência. Building the Project Mindfully: reflection on the mental health of nursing students in front of COVID-19The present experience report aims to highlight the authors’ experience in the construction of the Project Mindfully in a private university located in the city of Rio de Janeiro. The objective of this study is to point out its practical insertion, as well as, to portray the importance of a project of this magnitude in the care of the psychic health of nursing students, especially in the current context of social isolation by the pandemic of COVID-19. It is concluded that the action makes it possible to build a support network among the classmates themselves who are experiencing the same difficulties with this social isolation and alleviates situations that can maximize or trigger some type of mental disorder, such as anxiety and depression, through qualified listening, which is an important role of nurses at different levels of care.

scholarly journals Estrutura Urbana e Representações: A invenção da Zona Sul e a construção de um novo processo de segregação espacial no Rio de Janeiro nas primeiras décadas do século XX

GeoTextos ◽  
2010 ◽  
Vol 6 (1) ◽  
Author(s):  
Elizabeth Dezouzart Cardoso
Keyword(s):  
Twentieth Century ◽  
Residential Segregation ◽  
Rio De Janeiro ◽  
Urban Structure ◽  
The South ◽  
Large Area ◽  
Process Of Change ◽  
New Process ◽  
The City ◽  
South Zone

No Rio de Janeiro, a segregação espacial já era conhecida pelo menos desde meados do século XIX. No entanto, foi só nas primeiras décadas do século XX que surgiriam as bases para uma nova configuração da segregação espacial na cidade, com a criação e a ocupação do bairro de Copacabana, que proporcionou a “invenção” da Zona Sul, “topônimo” até então não utilizado, e do seu oposto, a grande área que ficou conhecida como “subúrbio”, termo até então utilizado com outro significado. A toponímia associada a essas novas áreas de expansão da cidade foi relacionada a uma representação que proporcionou as diretrizes da segregação residencial no Rio de Janeiro por várias décadas, até fins do século XX, na dicotomia zona sul/ subúrbios. O objetivo deste trabalho é demonstrar o processo de construção destas representações e de mudança e construção de um novo modelo de segregação residencial no Rio de Janeiro nas primeiras décadas do século XX. Abstract URBAN STRUCTURE AND REPRESENTATIONS: THE INVENTION OF THE SOUTH ZONE AND THE MAKING OF A NEW PROCESS OF SPACIAL SEGREGATION IN RIO DE JANEIRO IN THE FIRST DECADES OF THE TWENTIETH CENTURY In Rio de Janeiro, space segregation was already known at least since de mid nineteenth century. However, only in the first decades of the twetieth century there would be th basis for a new configuration of the space segregation in the city, with the creation and occupation of Copacabana district, causing th “invention” of the South Zone, “toponyn” until then not used, and of its opposite, the large area that became known as th “suburb”, a term wich until then had another meaning. The toponymy associated to these new areas of the expanding city was related to an representation that provided the grounds of residential segregation in Rio for many decades, until the end of the twentieth century, in the form of the dicotomy south zone/suburbs. The aim of this work is to show this process of consturuction of these representations and the process of change and building of a new model of segragation in Rio de Janeiro in the first decades of the twentieth century.

Pollutant monitoring in sludge treatment wetlands

2011 ◽  
Vol 64 (7) ◽  
pp. 1558-1565 ◽  
Author(s):  
E. Peruzzi ◽  
G. Masciandaro ◽  
C. Macci ◽  
S. Doni ◽  
B. Ceccanti
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Organic Compounds ◽  
Wastewater Treatment Plants ◽  
Land Application ◽  
Water Soluble ◽  
Sludge Stabilization ◽  
Organic Matter Stabilization ◽  
Urban Wastewater Treatment ◽  
Toxic Organic Compounds

Phragmites australis for sludge dewatering and stabilization processes have been widely proved. The presence of reeds, indeed, efficiently allows solids dewatering and organic matter stabilization in order to obtain a stabilised product that can be suitable for land application, even if its environmental impact has to be considered. The actual revision of the European Union's Working Document on Sludge (2000), in fact, seems to be addressed to detect two principal categories of pollutants in sludge for agricultural use: heavy metals and toxic organic compounds. In this study are presented results about sludge stabilization and monitoring of heavy metal fractionation and organic compounds in four urban wastewater treatment plants managed by Acque S.p.A., (Tuscany, Italy). To evaluate the process of sludge stabilization parameters were determined that highlight the biochemical and chemico-structural properties of sludge organic matter. The results showed that stabilization of the sludge over time occurred as shown by the low content of water soluble carbon and dehydrogenase activity, and by the re-synthesis of humic-like matter highlighted by the pyrolytic indices of mineralization and humification. Results about fractionation showed that heavy metals were retained in fractions related to the stabilized organic matter. Moreover, toxic organic compounds showed a drastic reduction at the end of the monitoring period.

scholarly journals Na poeira das ruas:

Revista Prumo ◽  
2019 ◽  
Vol 4 (7) ◽  
pp. 24-35
Author(s):  
Catarina Flaksman
Keyword(s):  
Rio De Janeiro ◽  
American Artist ◽  
Urban Transformations ◽  
The Creation ◽  
Alternative Scenarios ◽  
The City

This essay traces a parallel between the series “Museu do Homem Diagonal,” created in 2013 by Brazilian artist Renata Lucas in Rio de Janeiro, and Conical Intersect, created in 1975 by American artist Gordon Matta-Clark in Paris. Despite their different contexts, both artists responded to the ongoing urban transformations through the creation of a dialogue between their work, the changing surroundings, and the city dwellers. By analyzing how the artists evoked displacement and memory through urban interventions, this essay highlights the role of art in questioning the transitory nature of cities and its ability to imagine alternative scenarios.

scholarly journals Educação e Resistências que Ecoam da Amazônia: entrevista com Miguel Arroyo (Education and Resistances that Echo from of the Amazon: an interview with Professor Miguel Arroyo)

2020 ◽  
Vol 14 ◽  
pp. 4526152
Author(s):  
Reinaldo De Souza Marchesi ◽  
Leonardo Zenha Cordeiro
Keyword(s):  
Rio De Janeiro ◽  
Sao Paulo ◽  
Human Sciences ◽  
National Context ◽  
Xingu River ◽  
Historical Factors ◽  
Belo Horizonte ◽  
The Moment ◽  
The City

e4526152This interview with Professor Miguel G. Arroyo was carried out on the left side shores of the Xingu River, in Altamira (PA), in July (2th) 2019. The interview occurred during his participation in the 1st Academic Ethnodiversity Conference (JAETNO) at Universidade Federal do Pará (UFPA), Brazil. Arroyo was impressed with the city of Altamira and spoke strictly about the national context we are experiencing at the moment: From the perspective of concrete historical factors, attacks on human sciences, and education, specifically attacks towards childhood. Uneasy about the issues and their interactions with different areas of knowledge, Arroyo led us to reflect on the role of the resistance of educators in Brazil, especially in the Amazon region.ResumoEsta entrevista com o professor Miguel Gonzáles Arroyo foi realizada à margem esquerda do rio Xingu, na cidade de Altamira (PA), em 02 de julho de 2019, por ocasião da sua participação na 1ª Jornada Acadêmica de Etnodiversidade (JAETNO) da Universidade Federal do Pará (UFPA). Arroyo se impressiona com a cidade de Altamira e nos fala rigorosamente do momento nacional que estamos vivendo: da perspectiva da concretude histórica, dos ataques às ciências humanas e à educação e, em especial, à infância. Inquieto com as questões educacionais e suas interações com diversas áreas do conhecimento, ele nos leva à reflexão sobre o papel da resistência dos educadores do Brasil, em especial da região Amazônica.Palavras-chave: Amazônia, Etnodiversidade, Educação, Resistência.Keywords: Amazon, Ethnodiversity, Education, Resistence.Palabras claves: Amazonas, Etnodiversidad, Educación, Resistencia.ReferencesARROYO, Miguel G. Os desafios da educação no cenário político atual. Entrevista concedida a Reinaldo de Souza Marchesi e Leonardo Zenha Cordeiro. Altamira (PA), 02 de jul. 2019. 1 arquivo .mp4 (11min. 27s.).ARROYO, Miguel G. Vidas ameaçadas: exigências-respostas éticas da educação e da docência. Petrópolis - RJ: Editora Vozes, 2019.ASSARÉ, Patativa. Cante lá, que Eu Canto cá. Rio de Janeiro: Vozes, 1978.HOBSBAWM, E. J. Tempos interessantes: uma vida no século XX. São Paulo: Companhia das Letras, 2002.MARCHESI, Reinaldo de Souza. Conferência de abertura da 1ª JAETNO. 2019. 1 fotografia.MARCHESI, Reinaldo de Souza. Roda de conversa dos cursos de Educação do Campo e Etnodesenvolvimento - UFPA. 2019. 2 fotografia.MARCHESI, Reinaldo de Souza. Miguel Arroyo à margem esquerda do rio Xingu, Altamira (PA). 2019. 3 fotografia.NOGUEIRA, Paulo Henrique de Queiroz; MIRANDA, Shirley Aparecida de (Orgs.). Miguel Gonzáles Arroyo: educador em diálogo com nosso tempo. Belo Horizonte - MG: Autêntica, 2011.

scholarly journals Ser e Parecer “Patricinha”: família, amigos e identidade na adolescência

2007 ◽  
Vol 8 (7) ◽  
Author(s):  
Cláudia Da Silva Pereira
Keyword(s):  
Key Words ◽  
Social Relations ◽  
Rio De Janeiro ◽  
Quantitative Research ◽  
Cultural Industry ◽  
The Social ◽  
South Zone

Baseado em pesquisa realizada com mais de 100 adolescentes de camadas médias e altas da Zona Sul do Rio de Janeiro, este artigo tem por objetivo discutir as configurações sociais que determinam os novos papéis da família, dos amigos e da indústria cultural na construção da noção de adolescência e das identiÜades entre os indivíduos que vivem esta fase da vida. A partir dos resultados da pesquisa quantitativa e das entrevistas pessoais realizadas, é feita uma reflexão sobre as representações na adolescência e sua contribuição para as formas de classificação que se estabelecem nas relações sociais. Entre outras questões, é destacada a categoria de acusação “patricinhas”. <br> <br> <B>Palavras-chave</B>: adolescência, família, gênero. <br> <br> <br> <B>Abstract</B>: Based on a research realized with more than 100 middle and high classes teenagers from South Zone of Rio de Janeiro, this article objectives to discuss the social configurations that determine the new role of family, friends and cultural industry on the construction of the notion of adolescence and the identities among the ones who live this phase of life. From the results of the quantitative research and the personal interviews realized, we make a reflection about the representations in adolescence and their contributions to the classification forms the are present in the social relations. Among other ìuestions, it is focused the accusation category “patricinhas”. <br> <br> <B>Key words</B>: adolescence, family, gender.

scholarly journals Heavy metals concentration in soils from parks and green areas in Belgrade

2009 ◽  
Vol 74 (6) ◽  
pp. 697-706 ◽  
Author(s):  
Mirjana Marjanovic ◽  
Marija Vukcevic ◽  
Dusan Antonovic ◽  
Suzana Dimitrijevic ◽  
Djordje Jovanovic ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Urban Soils ◽  
Anthropogenic Activities ◽  
The Past ◽  
Ph Values ◽  
Green Areas ◽  
The City ◽  
Very High ◽  
Pb Concentration

The current study included the investigation of several metals and their distribution in urban soils from parks and green areas in the city of Belgrade. The soils were sampled in January and February 2008. The concentrations of Cd, Co, Cu, Pb, Mn and Zn were measured, as well as the pH values and organic matter contents. The obtained results showed that there was a significant level of contamination in some samples, especially with lead, and that it was most probably caused by anthropogenic activities, mostly from traffic. The results were compared with the National legislation and Netherlands standards. Also, the recent results were compared with the data from previous work and it was concluded that there has been a certain increase of the Pb concentration in the past three years. The level of pollution in playground soil was very high and each analyzed sample exceeded the Dutch target value for Cd, Co and Pb.

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