Effects of filtration and pH perturbation on organic matter fluorescence

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

Abstract

Fluorescence of organic matter from six contrasting freshwaters was analysed after filtration (1.2 microm and 0.2 microm filter sizes) and pH perturbation (+/-2 pH units from ambient conditions). Two fluorophores were compared in detail: tryptophan-like fluorescence, whose filtration and pH characteristics are relatively poorly understood, and humic-like fluorescence, which is better characterised. Although there was some variability in both fluorophores, the tryptophan-like fluorescence showed the most significant decrease in fluorescence intensity between raw and 1.2 microm filter samples, and a much smaller decrease between 1.2 and 0.2 microm, demonstrating a significant source associated with particulate material as well as a significant

Details

Original languageEnglish
Pages (from-to)2035-2043
Number of pages9
JournalChemosphere
Volume67
Publication statusPublished - 1 May 2007

Keywords

  • humic substances, fluorescence, filtration, organic matter, pH