Results 11 to 20 of about 1,394,705 (344)

Ferro zero: uma nova abordagem para o tratamento de águas contaminadas com compostos orgânicos poluentes Zero-valent iron: a new approach for treatment of waters contamined with organic pollutants

Química Nova, 2005
Anthropogenic pollution of groundwater and surface water has become a very serious environmental problem around the world. A wide range of toxic pollutants is recalcitrant to the conventional treatment methods, thus there is much interest in the ...
Wellington S. Pereira, Renato S. Freire
doaj   +1 more source

Performance evaluation of rhamnolipids addition for the biodegradation and bioutilization of petroleum pollutants during the composting of organic wastes with waste heavy oil

iScience, 2022
Summary: Environmental pollution caused by petroleum hydrocarbons is being paid more and more attention worldwide. Surfactants are able to improve the solubility of petroleum hydrocarbons, but their effects on petroleum hydrocarbon degradation in ...
Jianfeng Bao, Yuanfei Lv, Chenchen Liu, Shuangxi Li, Zhihong Yin, Yunjiang Yu, Liandong Zhu   +6 more
doaj   +1 more source

Computer-Assisted Design of Environmentally Friendly and Light-Stable Fluorescent Dyes for Textile Applications. [PDF]

, 2019
Five potentially environmentally friendly and light-stable hemicyanine dyes were designed based on integrated consideration of photo, environmental, and computational chemistry as well as textile applications.
Chen, Guoqiang, Sun, Gang, Tang, Songsong   +2 more
core   +1 more source

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

Ecological and Environmental Chemistry

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2017
Gheorghe Duca
doaj   +2 more sources

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

Chlorophylls - natural solar cells [PDF]

, 2011
A molecular modeling study was conducted on a series of six natural occurring chlorophylls. Quantum chemistry calculated orbital energies were used to estimate frequency of transitions between occupied molecular orbital and unoccupied molecular orbital ...
Balan, Mugur C., Bolboaca, Sorana D., Jantschi, Lorentz, Sestras, Radu E.   +3 more
core   +3 more sources

An Introduction To Environmental Chemistry And Green Chemistry And The Difference Between Green Chemistry And Environmental Chemistry

, 2022
Abstract As you see in the current situation, pollution is a global challenge. It affects the worldwide population, not even in India. The government has many policies to stop pollution, but still, it’s very challenging for us. The primary aim of environmental chemistry is to minimize the pollution in the environment and also the impact of the ...
openaire   +1 more source