Chromate reduction on humic acid derived from a peat soil - Exploration of the activated sites on HAs for chromate removal

S. W. Huang, P. N. Chiang, J. C. Liu, J. T. Hung, W. H. Kuan, Y. M. Tzou, S. L. Wang, J. H. Huang, C. C. Chen, M. K. Wang, R. H. Loeppert

研究成果: 雜誌貢獻期刊論文同行評審

42 引文 斯高帕斯(Scopus)

摘要

Humic substances are a major component of soil organic matter that influence the behavior and fate of heavy metals such as Cr(VI), a toxic and carcinogenic element. In the study, a repetitive extraction technique was used to fractionate humic acids (HAs) from a peat soil into three fractions (denoted as F1, F2, and F3), and the relative importance of O-containing aromatic and aliphatic domains in humic substances for scavenging Cr(VI) was addressed at pH 1. Spectroscopic analyses indicated that the concentrations of aromatic C and O-containing functional groups decreased with a progressive extraction as follows: F1>F2>F3. Cr(VI) removal by HA proceeded slowly, but it was enhanced when light was applied due to the production of efficient reductants, such as cal and H2O2, for Cr(VI). Higher aromatic- and O-containing F1 fraction exhibited a greater efficiency for Cr(VI) reduction (with a removal rate of ca. 2.89mmolg-1 HA under illumination for 3h). 13C NMR and FTIR spectra further demonstrated that the carboxyl groups were primarily responsible for Cr(VI) reduction. This study implied the mobility and fate of Cr(VI) would be greatly inhibited in the environments containing such organic groups.

原文英語
頁(從 - 到)587-594
頁數8
期刊Chemosphere
87
發行號6
DOIs
出版狀態已發佈 - 2012 五月

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

指紋 深入研究「Chromate reduction on humic acid derived from a peat soil - Exploration of the activated sites on HAs for chromate removal」主題。共同形成了獨特的指紋。

引用此