State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing, 100048, China.
State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China.
Environ Res. 2023 Jun 15;227:115677. doi: 10.1016/j.envres.2023.115677. Epub 2023 Mar 20.
The problem of taste and odor (T&O) in drinking water is a widespread societal concern and highlights substantial challenges related to the detection and evaluation of odor in water. In this study, the portable electronic nose PEN3, which is equipped with ten different heated metal sensors, was applied to analyze its applicability, feasibility and application scenarios for the detection of typical odorants, such as 2-methylisobornel (2-MIB), geosmin (GSM), β-cyclocitral, β-ionone, and other T&O compounds in source water, while avoiding uncertainties and instability related to manual inspection. All the T&O compounds could be effectively differentiated by principal component analysis (PCA). Linear discriminant analysis (LDA) showed that the odors varied greatly between different samples and could be effectively distinguished. As the odorant concentration increased, the sensor response intensity of the primary identification sensors R6 and R8 increased with a significant positive correlation. For Microcystis aeruginosa, an algae that produces odorants, PCA could distinguish the odors of algae at a series of densities at different concentrations. The responses of R10 showed a significant increase with increasing algae density, implying the production of more aliphatic hydrocarbons and other odor compounds. The results indicated that the electronic nose could provide a promising alternative to traditional unstable and complex detection methods for the detection of odorous substances in surface water and early warning of odor events. This study aimed to provide technical support for rapid monitoring and early warning of odorants in source water management.
饮用水中的异味和气味（T&O）问题是一个普遍存在的社会关注问题，突显了与水中气味检测和评估相关的重大挑战。在这项研究中，我们应用了配备十个不同加热金属传感器的便携式电子鼻 PEN3，以分析其在检测典型气味物质（如 2-甲基异莰醇（2-MIB）、土臭素（GSM）、β-环柠檬醛、β-紫罗兰酮和其他 T&O 化合物）方面的适用性、可行性和应用场景，同时避免了手动检测相关的不确定性和不稳定性。所有 T&O 化合物都可以通过主成分分析（PCA）有效区分。线性判别分析（LDA）表明，不同样品之间的气味差异很大，可以有效区分。随着气味浓度的增加，主要识别传感器 R6 和 R8 的传感器响应强度呈显著正相关增加。对于产生气味的蓝藻（Microcystis aeruginosa），PCA 可以区分不同浓度下一系列密度的藻类气味。R10 的响应随着藻类密度的增加而显著增加，表明产生了更多的脂肪烃和其他气味化合物。结果表明，电子鼻可以为地表水异味物质的检测和异味事件的预警提供一种有前途的替代传统不稳定和复杂的检测方法。本研究旨在为水源管理中异味剂的快速监测和预警提供技术支持。
