title: Insights into the binding interactions of autochthonous dissolved organic matter released from Microcystis aeruginosa with pyrene using spectroscopy.
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 (KDOC) 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 KDOC 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.
authors: State Key Laboratory of Marine Environmental Science of China (Xiamen University), College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China.
authors: Chenghu
authors: C
authors: Yang
authors: State Key Laboratory of Marine Environmental Science of China (Xiamen University), College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China.
authors: Yangzhi
authors: Y
authors: Liu
authors: Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
authors: Yaxian
authors: Y
authors: Zhu
authors: State Key Laboratory of Marine Environmental Science of China (Xiamen University), College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China; Zhangzhou Institute of Technology, Zhangzhou 363000, PR China. Electronic address: yzhang@xmu.edu.cn.
authors: Yong
authors: Y
authors: Zhang
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D006812:Humic Substances / Q000032:analysis; D046931:Microcystis / Q000254:growth & development / Q000378:metabolism; D008962:Models, Theoretical; D009930:Organic Chemicals / Q000032:analysis* / Q000378:metabolism; D025341:Principal Component Analysis; D011721:Pyrenes / Q000737:chemistry*; D012995:Solubility; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D006812:Humic Substances; D009930:Organic Chemicals; D011721:Pyrenes; C030984:pyrene
keywords: Autochthonous; Binding coefficient; Dissolved organic matter (DOM); Microcystis aeruginosa; Parallel factor (PARAFAC) analysis; Pyrene