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101.
Francisco Luiza Flavia Veiga do Amaral Crispim Bruno Spósito Juliana Caroline Vivian Solórzano Julio César Jut Maran Nayara Halimy Kummrow Fábio do Nascimento Valter Aragão Montagner Cassiana Carolina De Oliveira Kelly Mari Pires Barufatti Alexeia 《Environmental science and pollution research international》2019,26(24):24581-24594
Environmental Science and Pollution Research - Groundwaters are normally consumed without previous treatment and therefore the monitoring of contaminants in order to guarantee its safety is... 相似文献
102.
Ulysses Paulino de Albuquerque Luciana Gomes de Sousa Nascimento Fabio José Vieira Cybelle Maria de Albuquerque Duarte Almeida Marcelo Alves Ramos Ana Carolina Oliveira da Silva 《Journal of Agricultural and Environmental Ethics》2012,25(1):19-32
The scientific community has debated the importance of “return” activities after ethnobiological studies. This issue has provoked
debate because it touches on the ethics of research and the relationships with the people involved in these studies. This
case study aimed to investigate community perception of an ethnobotany research project that was carried out in the semi-arid
region of northeastern Brazil. Furthermore, we reported how the residents of this rural community felt about participating
in the activities of “return” that arose from the projects. Our findings demonstrate that “return” activities should be planned
from the design phase of the research until its closure as a lifelong process that allows the communities involved to gradually
take ownership of the information and actions that are being generated. Similarly, we argue that such activities must be negotiated
with the people of the community so that they have decision-making power and autonomy to decide what is most relevant to their
lives. 相似文献
103.
104.
Ecuador’s recently adopted conflict resolution techniques have aggravated the always tense encounters between Amazonian indigenous communities, oil companies and the state. The state’s governmentality project portrays these socio-environmental conflicts as mere technical–managerial issues while societal coalitions re-politicize them through territorial defense struggles. The Cofán Dureno case highlights how the self-proclaimed ‘Citizen’s Revolution’ government seeks to redefine socio-natural relationships and territorial identities, devising ‘communities of convenience’. These correspond to the state’s own images, political structure and ideology, promoting ‘community participation’ to facilitate oil extraction. Ecuador’s constitutionally recognized Rights of Nature (paradoxically installed by the same government) are analyzed with a focus on their potential for resisting socio-environmental injustice. The internationally celebrated inclusion of these rights in the Constitution was advocated by nonindigenous intellectual activists but influenced and supported by the indigenous movement. Beyond legal implications, these rights might foster an epistemic pact between indigenous and nonindigenous society to defend territories from extractive industries. 相似文献
105.
Diego Simón Ana Maria Borreguero Antonio de Lucas Carolina Molero Juan Francisco Rodríguez 《Journal of Material Cycles and Waste Management》2014,16(3):525-532
Flexible polyurethane foams can be advantageously treated by two-phase glycolysis in order to recover polyols with improved quality. The bottom phase obtained, which contains highly toxic reaction by-products and the excess glycol, presents an environmental and economic problem which should be solved. The main purpose of this work is the development of process for the valorization of these by-products, converting them in non-dangerous and profitable substances. For this process, most of the glycol can be recovered by means of vacuum distillation in order to reuse it in the glycolysis. On the other hand, the vacuum residue, containing the isocyanate part of the glycolysis by-products, was assayed as initiator in the synthesis of new polyols. Propoxylation of the initiator was carried out in different experimental conditions to obtain several polyether-polyols. Rigid polyurethane foams with suitable technical properties were synthesized with those polyols synthesized with the dangerous glycolysis by-products. 相似文献
106.
Computational fluid dynamics modelling of flow and particulate contaminants sedimentation in an urban stormwater detention and settling basin 总被引:1,自引:0,他引:1
Hexiang Yan Gislain Lipeme Kouyi Carolina Gonzalez-Merchan Céline Becouze-Lareure Christel Sebastian Sylvie Barraud Jean-Luc Bertrand-Krajewski 《Environmental science and pollution research international》2014,21(8):5347-5356
Sedimentation is a common but complex phenomenon in the urban drainage system. The settling mechanisms involved in detention basins are still not well understood. The lack of knowledge on sediment transport and settling processes in actual detention basins is still an obstacle to the optimization of the design and the management of the stormwater detention basins. In order to well understand the sedimentation processes, in this paper, a new boundary condition as an attempt to represent the sedimentation processes based on particle tracking approach is presented. The proposed boundary condition is based on the assumption that the flow turbulent kinetic energy near the bottom plays an important role on the sedimentation processes. The simulated results show that the proposed boundary condition appears as a potential capability to identify the preferential sediment zones and to predict the trapping efficiency of the basin during storm events. 相似文献
107.
Alejandra Iglesias Carolina Nebot Beatriz I. Vázquez Jose M. Miranda Carlos M. Franco Abuín Alberto Cepeda 《Environmental science and pollution research international》2014,21(3):2367-2377
The occurrence of pharmaceuticals in the aquatic environment has become a matter of concern in the last decade due to potential risks posed to non-target organisms and the potential for unintended human exposure via food chain. This concern has been driven by a high detection frequency for drugs in environmental samples; these substances are produced in large quantities and are used in both veterinary and human medicine, leading to deposition and potential effects in the environment. However, few studies have focused on the presence of pharmaceuticals in rural areas associated with farming activities in comparison to urban areas. The aim of this study is to investigate the occurrence of pharmaceutically active compounds in surface waters collected from urban and rural areas in northwestern Spain. A monitoring study was conducted with 312 river water samples analysed by high-performance liquid chromatography coupled to tandem mass spectrometry. Positive detection of pharmaceuticals was made for 51 % of the samples. Decoquinate, sulfamethazine, sulfamethoxypyridazine and trimethoprim were the drugs most frequently detected, being present in more than 10 % of the samples. The sampling sites located downstream of the discharge points for wastewater treatment plants yielded the highest number of positive samples, 13 % of the positive samples were detected in these sites and 38 % of the samples collected near the collection point of a drinking water treatment plant were positive. 相似文献
108.
Amanda H. Lynch Carolina E. Adler Nicholas C. Howard 《Regional Environmental Change》2014,14(4):1601-1613
The Murray–Darling Basin is Australia’s national food bowl, home to almost half of the national income from food production, as well as internationally significant wetlands, iconic red gum forests, endangered flora and fauna, and approximately 40 autonomous indigenous nations. Persistent severe drought and extreme flooding episodes have presented new challenges in the region. Chief among these challenges is the establishment of a legitimate framework to sustainably manage water resources that finds common ground between environmental, indigenous and commercial interests. A powerful approach to examine these processes is through the theory of diffusion and adaptation of policy innovations. Here, we describe an approach to place this theory on empirical ground using Q methodology. We elucidate patterns of subjectivity, to explore the perceptions of expert advice, subsidiarity and local knowledge to better understand the interests in play. We find that respect is held for local practitioners (water managers and farmers) and indigenous knowledge, but while policy innovations are being generated, the diffusion of policy is contested. We identify the potential, though limited, for common ground through substantive and respectful consultation. 相似文献
109.
Bergamasco AM Eldridge M Sanseverino J Sodré FF Montagner CC Pescara IC Jardim WF Umbuzeiro Gde A 《Journal of environmental monitoring : JEM》2011,13(11):3288-3293
Estrogenic Endocrine Disrupting Chemicals (EDCs) are a concern due to their ubiquity and recognized adverse effects to humans and wildlife. Methods to assess exposure to and associated risks of their presence in aquatic environment are still under development. The aim of this work is to assess estrogenicity of raw and treated waters with different degrees of pollution. Chemical analyses of selected EDCs were performed by liquid chromatography-tandem mass spectrometry, and estrogenic activity was evaluated using in vitro bioluminescent yeast estrogen assay (BLYES). Most raw water samples (18/20) presented at least one EDC and 16 rendered positive in BLYES. When EDCs were detected, the bioassay usually provided a positive response, except when only bisphenol A was detected at low concentrations. The highest values of estrogenic activity were detected in the most polluted sites. The maximum estrogenic activity observed was 8.7 ng equiv. of E2 L(-1). We compared potencies observed in the bioassay to the relative potency of target compounds and their concentrations failed to fully explain the biological response. This indicates that bioassay is more sensitive than the chemical approach either detecting estrogenic target compounds at lower concentrations, other non-target compounds or even synergistic effects, which should be considered on further investigations. We have not detected either estrogenic activity or estrogenic compounds in drinking water. BLYES showed good sensitivity with a detection limit of 0.1 ng equiv. E2 L(-1) and it seems to be a suitable tool for water monitoring. 相似文献
110.
Valter M. Azevedo-Santos Marcelo F. G. Brito Pedro S. Manoel Júlia F. Perroca Jorge Luiz Rodrigues-Filho Lucas R. P. Paschoal Geslaine R. L. Gonalves Milena R. Wolf Martín C. M. Blettler Marcelo C. Andrade Andr B. Nobile Felipe P. Lima Ana M. C. Ruocco Carolina V. Silva Gilmar Perbiche-Neves Jorge L. Portinho Tommaso Giarrizzo Marlene S. Arcifa Fernando M. Pelicice 《Ambio》2021,50(7):1313
Plastics are dominant pollutants in freshwater ecosystems worldwide. Scientific studies that investigated the interaction between plastics and freshwater biodiversity are incipient, especially if compared to the marine realm. In this review, we provide a brief overview of plastic pollution in freshwater ecosystems around the world. We found evidence of plastic ingestion by 206 freshwater species, from invertebrates to mammals, in natural or semi-natural ecosystems. In addition, we reported other consequences of synthetic polymers in freshwater ecosystems—including, for instance, the entanglement of animals of different groups (e.g., birds). The problem of plastic pollution is complex and will need coordinated actions, such as recycling programs, correct disposal, stringent legislation, regular inspection, replacement of synthetic polymers with other materials, and ecological restoration. Current information indicates that the situation in freshwater ecosystems may be as detrimental as the pollution found in the ocean, although highly underappreciated.Supplementary InformationThe online version of this article (10.1007/s13280-020-01496-5) contains supplementary material, which is available to authorized users. 相似文献