Results 21 to 30 of about 5,481,751 (393)

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

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

Defect-Driven Anomalous Transport in Fast-Ion Conducting Solid Electrolytes [PDF]

Nature Materials (2022), 2021
Solid-state ionic conduction is a key enabler of electrochemical energy storage and conversion. The mechanistic connections between material processing, defect chemistry, transport dynamics, and practical performance are of considerable importance, but remain incomplete.
arxiv   +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

MetaChem: An Algebraic Framework for Artificial Chemistries [PDF]

Artificial Life 26(2):153-195 2020, 2019
We introduce MetaChem, a language for representing and implementing Artificial Chemistries. We motivate the need for modularisation and standardisation in representation of artificial chemistries. We describe a mathematical formalism for Static Graph MetaChem, a static graph based system.
arxiv   +1 more source

Overview of HOMEChem: House Observations of Microbial and Environmental Chemistry.

Environmental Science: Processes & Impacts, 2019
The House Observations of Microbial and Environmental Chemistry (HOMEChem) study is a collaborative field investigation designed to probe how everyday activities influence the emissions, chemical transformations and removal of trace gases and particles ...
D. Farmer, M. Vance, J. Abbatt, A. Abeleira, M. R. Alves, C. Arata, E. Boedicker, Stephen F. Bourne, F. Cardoso-Saldaña, R. Corsi, R. Corsi, P. DeCarlo, A. Goldstein, Vicki H. Grassian, L. H. Ruiz, J. Jimenez, T. Kahan, T. Kahan, E. Katz, J. Mattila, W. Nazaroff, A. Novoselac, R. O’Brien, V. W. Or, Sameer Patel, S. Sankhyan, P. Stevens, Yilin Tian, M. Wade, Chen Wang, Shan Zhou, Yong Zhou   +31 more
semanticscholar   +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

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

Stress-driven oxidation chemistry of wet silicon surfaces [PDF]

Journal of Physical Chemistry C 112, 12077-12080 (2008), 2009
The formation of a hydroxylated native oxide layer on Si(001) under wet conditions is studied by means of first principles molecular dynamics simulations. Water molecules are found to adsorb and dissociate on the oxidised surface leading to rupture of Si-O bonds and producing reactive sites for attack by dissolved dioxygen or hydrogen peroxide ...
arxiv   +1 more source