Infrared sensors for environmental and biomedical applications
Infrared sensors for environmental and biomedical applications
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DOI：
10.1117/12.2583757
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
J. E. Park;K. Hodges;U. Tumuluri;A. Zaki;J. C. Dussor;T. Daunis;K. Clark;D. Robbins;K. Roodenko
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文献类型：
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作者：
J. E. Park;K. Hodges;U. Tumuluri;A. Zaki;J. C. Dussor;T. Daunis;K. Clark;D. Robbins;K. Roodenko
通过检测化学和生物污染物来监测水质，对于确保提供和排放清洁水，从而保护人类健康和生态系统至关重要。在现有的分析技术中，红外（IR）光谱法提供了对多种水污染物的灵敏和选择性检测。在这项工作中，我们提出了一个应用红外光谱定性和定量评估的化学和生物水污染物。我们专注于废水处理过程控制和自动化中硝酸盐和铵形式的氮污染物的在线检测。我们讨论了水质参数，如盐度，pH值和温度对氮污染物的红外光谱的影响。然后，我们专注于应用的传感器检测污染物的新兴关注，如砷和全氟和多氟烷基物质（PFAS）在饮用水。我们演示了多元统计分析在复杂流体中自动数据处理的使用。最后讨论了红外光谱技术在水体生物污染物检测中的应用。我们使用E.大肠杆菌细菌，以确定其在水中的存在，以及区分不同菌株的细菌。总体而言，这项工作表明，红外光谱是一种很有前途的技术，用于监测水中的化学和生物污染物，并具有实时在线水质监测的潜力。
Monitoring water quality by detecting chemical and biological contaminants is critical to ensuring the provision and discharge of clean water, hence protecting human health and the ecosystem. Among the available analytical techniques, infrared (IR) spectroscopy provides sensitive and selective detection of multiple water contaminants. In this work, we present an application of IR spectroscopy for qualitative and quantitative assessment of chemical and biological water contaminants. We focus on in-line detection of nitrogen pollutants in the form of nitrate and ammonium for wastewater treatment process control and automation. We discuss the effects of water quality parameters such as salinity, pH, and temperature on the IR spectra of nitrogen pollutants. We then focus on application of the sensor for detection of contaminants of emerging concern, such as arsenic and Per- and polyfluoroalkyl substances (PFAS) in drinking water. We demonstrate the use of multivariate statistical analysis for automated data processing in complex fluids. Finally, we discuss application of IR spectroscopy for detecting biological water contaminants. We use the metabolomic signature of E. coli bacteria to determine its presence in water as well as distinguish between different strains of bacteria. Overall, this work shows that IR spectroscopy is a promising technique for monitoring both chemical and biological contaminants in water and has the potential for real-time, inline water quality monitoring.