Results 11 to 20 of about 378,243 (253)

Hormônios sexuais estrógenos: contaminantes bioativos Sexual estrogenic hormones: bioactive contaminants

Química Nova, 2006
Natural and synthetic estrogens have been detected in rivers, lakes and estuaries in several parts of the world. The primary sources of these compounds are the industrial and household effluents, which are not eliminated by the received treatment.
Ricardo Wagner Reis Filho, Juliana Coutinho de Araújo, Eny Maria Vieira   +2 more
doaj   +1 more source

A Model Assessment of the Occurrence and Reactivity of the Nitrating/Nitrosating Agent Nitrogen Dioxide (^•NO₂) in Sunlit Natural Waters

Molecules, 2022
Nitrogen dioxide (•NO2) is produced in sunlit natural surface waters by the direct photolysis of nitrate, together with •OH, and upon the oxidation of nitrite by •OH itself. •NO2 is mainly scavenged by dissolved organic matter, and here, it is shown that
Davide Vione
doaj   +1 more source

Assembly and Curation of Lists of Per- and Polyfluoroalkyl Substances (PFAS) to Support Environmental Science Research

Frontiers in Environmental Science, 2022
Per- and polyfluoroalkyl substances (PFAS) are a class of man-made chemicals of global concern for many health and regulatory agencies due to their widespread use and persistence in the environment (in soil, air, and water), bioaccumulation, and toxicity.
Antony J. Williams, Linda G. T. Gaines, Christopher M. Grulke, Charles N. Lowe, Gabriel F. B. Sinclair, Vicente Samano, Inthirany Thillainadarajah, Bryan Meyer, Grace Patlewicz, Ann M. Richard   +9 more
doaj   +1 more source

Analysis of the relationship between students’ argumentation and chemical representational ability: a case study of hybrid learning oriented in the environmental chemistry course

Chemistry Teacher International, 2023
Engaging students in collaborative learning fosters the expression of ideas, deepens understanding, and hones argumentation skills. Argumentation is pivotal, and instructors should facilitate opportunities for its practice.
Ramadhani Dimas Gilang, Yamtinah Sri, Saputro Sulistyo, Widoretno Sri   +3 more
doaj   +1 more source

Métodos emergentes para aumentar a eficiência do ozônio no tratamento de águas contaminadas New methods for enhancing ozone efficiency on contaminated water treatment

Química Nova, 2007
Many industrial processes produce effluents with a wide variety of xenobiotic organic pollutants, which cannot be efficiently degraded by conventional biological treatments.
Amira Mahmoud, Renato S. Freire
doaj   +1 more source

Influence of Densification on the Pyrolytic Behavior of Agricultural Biomass Waste and the Characteristics of Pyrolysis Products

Energies, 2022
TG/FT-IR techniques, UV-spectroscopy, microwave extraction, XRD and SEM were used to study how densification of the three types of agricultural biomass wastes (wheat straw, soft wood, and sunflower husk) changes the composition and structure of their ...
Marcin Bielecki, Valentina Zubkova, Andrzej Strojwas   +2 more
doaj   +1 more source

Dataset on Environmental Parameters and Greenhouse Gases in Port and Harbor Seawaters of Jeju Island, Korea

Data
This dataset presents environmental observations collected in August 2021 from 18 port and harbor sites located around Jeju Island, Korea. It includes physical, biogeochemical, and greenhouse gas (GHG) variables measured in surface seawater, such as ...
Jae-Hyun Lim, Ju-Hyoung Kim, Hyo-Ryeon Kim, Seo-Young Kim, Il-Nam Kim   +4 more
doaj   +1 more source

Start-up and steady-state conditions of an Anaerobic Hybrid Reactor (AHR) using mini-filters composed with two types of support medium operating under low loading rates

Brazilian Archives of Biology and Technology, 2011
The present work aimed at studying the operational parameters of an Anaerobic Hybrid Reactor (AHR) removing organic matter of coffee wastewater with low concentration.
Vivian Galdino da Silva, Cláudio Milton Montenegro Campos, Erlon Lopes Pereira, Júlia Ferreira da Silva   +3 more
doaj   +1 more source

Climate Change and Its Potential Impact on the Conservation of Wooden Pole Dwellings in Lake Bolsena: Insights from Climate Proxy Data and High-Frequency Water Monitoring

Hydrology
This study examines the impact of recent climatic trends on the preservation of submerged wooden structures at the Gran Carro archaeological site in Lake Bolsena, Italy.
Swati Tamantini, Maria Cristina Moscatelli, Francesco Cappelli, Barbara Barbaro, Egidio Severi, Federica Antonelli, Giulia Galotta, Marco Ciabattoni, Manuela Romagnoli   +8 more
doaj   +1 more source

The role of atmospheric precipitation in introducing contaminants to the surface waters of the Fuglebekken catchment, Spitsbergen [PDF]

Polar Research, 2015
Although the Svalbard Archipelago is located at a high latitude, far from potential contaminant sources, it is not free from anthropogenic impact.
Katarzyna Kozak, Krystyna Kozioł, Bartłomiej Luks, Stanisław Chmiel, Marek Ruman, Mariusz Marć, Jacek Namieśnik, Żaneta Polkowska   +7 more
doaj   +1 more source