Underwater spectrophotometer for in-situ seawater COD monitoring

Ming Zhu; Wei Chen; Liangpei Chen; Peng Liu; Yizhou Zhang; Jianping Li

doi:10.1117/12.2588022

12 April 2021 Underwater spectrophotometer for in-situ seawater COD monitoring

Ming Zhu, Wei Chen, Liangpei Chen, Peng Liu, Yizhou Zhang, Jianping Li

Proceedings Volume 11752, Ocean Sensing and Monitoring XIII; 117520C (2021) https://doi.org/10.1117/12.2588022
Event: SPIE Defense + Commercial Sensing, 2021, Online Only

Abstract

Traditional seawater chemical oxygen demand (COD) monitoring methods are based on manual operations, which require various operating procedures and long duration of measurement, are prone to secondary pollution and hence unsuitable for in-situ monitoring. In this paper, we developed a prototype of in-situ seawater COD monitoring sensor based on UV-Vis absorption spectroscopy, and integrating it to a buoy for coastal trials. During the trials, several measures were applied to reduce the influence of biofouling, including coating sensor housing with an environment-friendly anti-fouling paint, and designing a motorized underwater wiper for optical window cleaning. The in-situ COD sensor had been continuously working underwater for more than 6 months, obtaining 1536 sets of seawater UV-Vis absorption sectrum.

Conference Presentation

Citation Download Citation

Ming Zhu, Wei Chen, Liangpei Chen, Peng Liu, Yizhou Zhang, and Jianping Li "Underwater spectrophotometer for in-situ seawater COD monitoring", Proc. SPIE 11752, Ocean Sensing and Monitoring XIII, 117520C (12 April 2021); https://doi.org/10.1117/12.2588022

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