Portable Conductometric Sensing Probe for Real-Time Monitoring Ammonia Profile in Coastal Waters
文献类型： 外文期刊
作者： Zhou, Ming 1 ; Li, Tianling 2 ; Fan, Kaicai 1 ; Shu, Yajie 1 ; Liu, Porun 1 ; Zhao, Huijun 1 ;
作者机构： 1.Griffith Univ, Ctr Catalysis & Clean Energy, Gold Coast Campus, Gold Coast, Qld 4222, Australia
2.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Jiangsu Key Lab Atmospher Environm Monitoring & P, Sch Environm Sci & Engn,Joint Int Res Lab Climate, Nanjing 210044, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Minist Agr & Rural Affairs Peoples Republ China, Key Lab Agroenvironm Downstream Yangtze Plain, Nanjing 210014, Peoples R China
4.Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266042, Peoples R China
5.Wuhan Text Univ, Natl Joint Lab Adv Text Proc & Clean Prod, Wuhan 430200, Peoples R China
关键词： in situ; real-time sensing; ammonia monitoring; coastalammonia; coastal environments
期刊名称：ACS SENSORS （ 影响因子：8.9； 五年影响因子：9.0 ）
ISSN： 2379-3694
年卷期： 2023 年
页码：
收录情况： SCI
摘要： An ability to real-time and continuously monitor ammonium/ammonia profiles of coastal waters over a prolonged period in a simple and maintenance-free fashion would enable economic conducting large-scale assessments, providing the needed scientific insights to better control and mitigate the impact of eutrophication on coastal ecosystems. However, this is a challenging task due to the lack of capable sensors. Here, we demonstrate the use of a membrane-based conductometric ammonia sensing probe (CASP) for real-time monitoring of ammonia levels in coastal waters. A boric acid/glycerol receiving phase is investigated and innovatively utilized to overcome the high salinity of coastal water-induced analytical errors. A calibration-free approach is used to eliminate the need for ongoing calibration, while the issues concerning practical applications, such as salinity variation, ammonia intake capability, and biofouling, are systematically investigated. The field deployment at an estuary confluence water site over a half-moon cycle period confirms that CASP is capable of continuously monitoring the ammonia profile of coastal waters in real-time with high resolution and accuracy to unveil the dynamic ammonia concentration changes over a prolonged period.
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