Insights into the binding interactions of autochthonous dissolved organic matter released from Microcystis aeruginosa with pyrene using spectroscopy. Issue 1 (15th March 2016)

• Record Type: Journal Article
• Authors: Yang, Chenghu; Liu, Yangzhi; Zhu, Yaxian; Zhang, Yong
• Is Part Of: Marine pollution bulletin. Volume 104:Issue 1/2(2016:Mar.)
• Page Start: 113
• Page End: 120
• Publication Date: 2016-03-15
• Subjects: Microcystis aeruginosa -- Autochthonous -- Dissolved organic matter (DOM) -- Pyrene -- Parallel factor (PARAFAC) analysis -- Binding coefficient; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2016.01.053
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: The autochthonous dissolved organic matter (DOM) released by Microcystis aeruginosa ( M. aeruginosa -DOM) during its growth period was characterized by spectroscopy. Furthermore, the relationships between the M. aeruginosa -DOM spectroscopic descriptors and the pyrene binding coefficient ( K DOC ) values were explored. The results showed that the spectroscopic characteristics of the M. aeruginosa -DOM and the binding properties of pyrene were dynamically changed along with the algae growth. Pearson correlation analysis demonstrated that a higher pyrene K DOC value was observed for the M. aeruginosa -DOM that has a higher humification index (HIX) value, a lower biological index (BIX) value and a lower absorption ratio (E2/E3). The presence of protein-like and long-wavelength-excited humic-like components may impose negative and positive effects on binding of pyrene by the M. aeruginosa -DOM, respectively. Principal component analysis (PCA) further supported that the binding affinity of pyrene may be primarily influenced by the humification degree of the M. aeruginosa -DOM. Graphical abstract: Highlights: Spectroscopic characterization of DOM from M. aeruginosa during its growth period. The binding properties of pyrene with the M. aeruginosa -DOM were investigated. The humification degree was highly associated with the pyrene K DOC values. The environmental behavior of PAHs was effected by periodic blooms.