Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation

Full text
Author(s):
Tadini, Amanda M. [1] ; Moreira, Altair B. [1] ; Bisinoti, Marcia C. [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias Letras & Ciencias Exatas, Dept Quim & Ciencias Ambientais, Lab Estudos Ciencias Ambientais, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 25, n. 1, p. 119-125, JAN 2014.
Web of Science Citations: 2
Abstract

This study had as main objectiveto evaluate the influence of AHS obtained from an area under sugarcane cultivation on the dynamics of chromium species (Cr(III) and Cr(VI)). Was studied complexing capacity (CC) with the AHS of chromium species and these were characterized using UV/Vis spectrophotometry, molecular fluorescence, elemental analysis and infrared. AHS with and without fractionation showed a greater aromaticity degree and a predominance of humic acids, and the E4/E6 and E2/E4 ratios suggested aromatic rings and a greater contribution from plants, which indicates lignin structures. The highest CCs were observed for the AHS fractionated, being fraction with molecular-size < 10 kDa and 10-30 kDa showed the highest ability to complex Cr(III) and Cr(VI) ions, respectively. These results are corroborating with C/H/N and UV/Vis data, where we can conclude that the AHS without fractionation had the greatest aromaticity and a predominance of humic acids in their structure. (AU)

FAPESP's process: 10/13879-2 - Humic substances and chromium ions interaction and proposal of a labile organic matter indicator
Grantee:Amanda Maria Tadini
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 10/09271-9 - Contamination evaluation and behavior of metals in sediments, fish tissue and surface water samples of rivers of the Turvo/Grande watershed
Grantee:Márcia Cristina Bisinoti
Support Opportunities: Regular Research Grants