Variations of different dissolved and particulate phosphorus classes during an algae bloom in a eutrophic lake by 31P NMR spectroscopy
| Autor: | Yun-kai Zhou, Jin-hua Sun, Jiehua Wang, Xiuling Bai, Hongyan Zhao, Lei Gu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Pollution
Environmental Engineering 010504 meteorology & atmospheric sciences Primary producers Chemistry Ecology Health Toxicology and Mutagenesis media_common.quotation_subject Phosphorus Public Health Environmental and Occupational Health chemistry.chemical_element Particle (ecology) General Medicine General Chemistry 010501 environmental sciences Particulates 01 natural sciences Algal bloom Bioavailability Environmental chemistry Environmental Chemistry Eutrophication 0105 earth and related environmental sciences media_common |
| Zdroj: | Chemosphere. 169:577-585 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2016.11.116 |
| Popis: | Characterization of phosphorus (P) pools is vital to understanding the contribution of P to water eutrophication. In this study, dissolved and particulate P classes during an algae bloom in Lake Taihu, as well as their relationships with the main environmental factors, were analyzed based on solution 31P NMR. The results showed that dissolved P was dominated by orthophosphate (Ortho-P) in heavily polluted regions and by orthophosphate monoester (Mono-P) and orthophosphate diester (Diester-P) in lightly polluted regions, indicating that the main dissolved P classes varied with the degree of lake pollution. The difference in the temporal variation patterns of dissolved P classes revealed that dissolved Ortho-P is the preferred class, and its concentration may be affected by major primary producers. It also revealed that dissolved Mono-P is prone to accumulation under the effects of algal blooms, especially in heavily polluted regions. The main particulate P classes were similar to those of dissolved P, but their variation trends were the same in different lake regions. There were significant positive correlations between the major particulate P classes and Chl a during the majority of the sampling period, indicating that living algal cells have a major contribution to particulate P. Obvious temporal variations of P classes may affect the bioavailability and dynamics of P in the water of Lake Taihu, but the particle reactivities of the main inorganic and organic P classes were similar. Therefore, they have little effect on P partitioning between the dissolved and particulate phases. |
| Databáze: | OpenAIRE |
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