Development of a simple and versatile ultrafiltration system for the fractionation of aquatic humic substances
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
01/02/2012
|
| Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Processo FAPESP: 07/50461-3 Processo FAPESP: 05/51242-8 A new fractionation system using membrane ultrafiltration was developed and applied to aqueous extracts of humic substances (HSs). Four polyethersulfone membranes of molecular weight cut offs of 10, 30, 50 and 100 kDa were used. The system was quite efficient in fractionating HSs with different molecular sizes. HS fractions were characterized by Fourier transform infrared spectroscopy and ultraviolet/visible spectrophotometry to obtain E-2/E-3 ratios, which describe the aromaticity of the fractions. The E-2/E-3 ratios were in agreement with those obtained using current commercial systems, and FTIR spectra of all fractions presented characteristic bands of the HSs. Therefore, it can be concluded that this system is a simple, versatile and low cost alternative to the current systems on the market. (C) 2011 Elsevier Ltd. All rights reserved. |
| Formato |
156-161 |
| Identificador |
http://dx.doi.org/10.1016/j.orggeochem.2011.10.002 Organic Geochemistry. Oxford: Pergamon-Elsevier B.V. Ltd, v. 43, p. 156-161, 2012. 0146-6380 http://hdl.handle.net/11449/22250 10.1016/j.orggeochem.2011.10.002 WOS:000299815000015 |
| Idioma(s) |
eng |
| Publicador |
Pergamon-Elsevier B.V. Ltd |
| Relação |
Organic Geochemistry |
| Direitos |
closedAccess |
| Tipo |
info:eu-repo/semantics/article |
