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Diagnosing complex odor problems occurring in micro-polluted source water: Primary approach and application.

Qingyuan Guo¹, Cheng Ding², Haozhe Xu²

¹College of Environmental Science & Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu Province, 224051, China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

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Summary

This summary is machine-generated.

River water odor issues are complex. This study identified six odor types and 33 odorants in TY River source water, clarifying 88-95% of the detected odors and providing key insights for water treatment.

Keywords:

Complex odors Micro-polluted water source Odor activity value Odorants Reconstitution test

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Area of Science:

Environmental Science
Water Chemistry
Analytical Chemistry

Background:

River-type micro-polluted water sources present complex odor challenges, unlike lakes or reservoirs.
Specific odor compounds in the TY River were previously unclear, hindering effective odor management.

Purpose of the Study:

To comprehensively characterize the odors and identify the specific odor-causing compounds in TY River source water.
To establish a quantitative relationship between identified odorants and perceived odor types.

Main Methods:

Sensory analysis to detect and classify six distinct odor types (earthy, marshy, fishy, woody, medicinal, chemical).
Gas chromatography-mass spectrometry (GC-MS) and odor activity value (OAV) evaluation to identify and quantify 33 odorant compounds.
Odor reconstitution experiments to validate the contribution of identified compounds to overall odor profiles.

Main Results:

Six odor types were identified for the first time in this river source.
Thirty-three specific odor-causing compounds were identified and linked to their respective odor types.
Geosmin and 2-methylisoborneol (earthy), sulfides and indole (marshy), vanillin and geraniol (woody), 2,4-decadienal and 2-octenal (fishy), chlorophenols and naphthalene (medicinal), and 1,4-dichlorobenzene (chemical) were key contributors.
Odor reconstitution confirmed that identified compounds explained 88-95% of the observed odors.

Conclusions:

This study provides the first simultaneous identification of six odor types and 33 odorants in a river-type micro-polluted water source.
The findings offer crucial data for developing targeted strategies for odor management in drinking water treatment plants receiving river water.
Understanding specific odorant profiles is essential for addressing public complaints and ensuring water quality.