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First Steps of in Situ Surface-Enhanced Raman Scattering During Shipboard Experiments ArchiMer
Peron, Olivier; Rinnert, Emmanuel; Colas, Florent; Lehaitre, Michel; Compere, Chantal.
It is shown that the surface-enhanced Raman scattering (SERS) technique can be applied to detect organic molecules during in situ experiments. To this purpose, we used trans-1,2-bis(4-pyridyl)ethylene (BPE) as a target molecule. Adsorbed on the SERS chemosensor surface and excited under laser, the vibration modes of the molecules can be identified. SERS chemosensors are based on quartz substrates functionalized by silanization and partially coated with gold nanoparticles. SERS measurements during shipboard experiments were made with a home-made in situ Raman spectrometer connected to a marinized micro-fluidic system. The device was designed to host chemosensors in order to ensure measurements with a flow cell. A theoretical limit of detection was estimated...
Tipo: Text Palavras-chave: Surface-enhanced Raman scattering; SERS; Chemosensors; Flow cells; Shipboard experiments; In situ measurements; Freundlich isotherm.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00016/12691/9718.pdf
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Impact of percentage and particle size of sugarcane biochar on the sorption behavior of clomazone in Red Latosol Anais da ABC (AABC)
SILVA,MARCOS R.F. DA; QUEIROZ,MARIA ELIANA L.R. DE; NEVES,ANTÔNIO A.; SILVA,ANTÔNIO A. DA; OLIVEIRA,ANDRÉ F. DE; OLIVEIRA,RENAN L. DE; AZEVEDO,MARIANE M..
Abstract Biochar is a carbonaceous material that has excellent potential as a fertilizer and soil conditioner. However, there is a lack of information concerning the effects of the amount and particle size of this pyrogenic material on the soil sorption capacity. In this work, evaluation was made of changes in clomazone (CMZ) sorption in a Red Latosol following soil conditioning using different percentages (0.25, 0.5, and 1% w/w) of sugarcane biochar in three particle sizes (<106, 106-508, and 508-610 µm). The conditioned soils presented apparent sorption coefficients (Kd) up to 1300 times higher than that of pure soil, besides changes in the behavior of CMZ sorption. The biochar particle size and percentage influenced sorption of the herbicide as well...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apparent sorption coefficient; Batch experiment; External surface area; Factorial design; Freundlich isotherm; Herbicide retention.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703745
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