To elicit the amount of nutrients in the aquatic environment by remote sensing is a challenging goal, notably in a marine setting with high saline content. To validate new technologies, a series of classic spectrocolormetric tests and spectroscopic analysis were used to characterize phosphorus and nitrogen speciation in these bodies of water with correlation to surface bound nutrients at the sediment-water interface. Simple light dark biochemical oxygen demand bottles allow the creation of reproducible microcosms of the natural seawater column with or without underlying sediment.  The variation of oxygen production through photosynthesis is greatly impacted by augmentation of phosphorus and nitrogen anion species.   These ions  are key  limiting  nutrients  in  marine  and  terrestrial  waters integral to primary production, understanding their  impact  will allow better modelling of ecological impacts from anthropogenic releases. The variation of anion composition, pH, and oxygen under varying experimental conditions were accessed over a one-month period. Bioavailable labile pore water  and  microwavable optimal  permanently  bound   anion release capacity from under lying sediment were characterized for the potential  flux  between  the  two  phases to determine the  impact on primary production . Aqueous spectrocolormetric spot tests for phosphorous and nitrogen species anions determination were preformed following the HACH® procedure.  These color  spot  tests  were compared to instrumental analysis by HPLC-IC with inline electrochemical detector RI, UV/Vis phosphorus lines in ICP [214 and 217 nm], and vacuum XRF. Analysis of sea and terrestrial water evaporates by ATR-FTIR, diffuse FTIR, XRF and Raman spectroscopy were used to illicit spectroscopic anionic signatures and their detection limits were determined.<br/>

Anion augmentation of seawater and sediment microcosms on the production of oxygen enhancing predictive modelling of ecological pollution impacts

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.