Consulta: subjectFacets:"Chemical reactions"
Registros recuperados: 2
Data/hora: 27/07/2024 03:07:26

Evolution de la complexation des metaux (Ca, Mg, Cd, Pb et Cu) dans l''estuaire de la Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fischer, J; Wartel, M.
Interaction between metallic ions and dissolved organic matter can take major part in the biogeochemical cycle of metals in the aquatic environment. The authors point out copper behavior by the study of complexing capacity of surface and bottom waters. A systematic analysis of major elements in natural waters has allowed for a proposal of geographical distribution of metals.
Tipo: Text
Palavras-chave: River plumes; Dissolved organic matter; Chemical reactions; Salinity; Biogeochemical cycle; Metals; Ion association; Water properties.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1299.pdf

Surface modification of activated carbon by corona treatment
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: PEGO,MATHEUS F.F.; BIANCHI,MARIA LÚCIA; CARVALHO,JANAÍNA A.; VEIGA,TAIS R.L.A.
Surface modification may lead activated carbon (AC) to take on different properties. This study aimed to promote surface modification of activated carbons using corona treatment (electrical discharge). In this study, powdered commercial activated carbon was used. Activated carbons were subjected to corona treatment at different exposure times (2, 5, 8 and 10 min) at 4.5 cm height from the source. To observe differences promoted by treatment, activated carbons were analyzed by acidity, surface functional groups, Fourier Transform Infrared Spectroscopy (FTIR), elemental analysis (CHN), proximate analysis and thermogravimetry. Corona treatment impacted surface chemistry of activated carbons. There was a trend of increasing surface acidity according to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemical reactions; Electric discharge; Oxidation; Surface chemistry.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100402