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Occurrence and Distribution of Taste and Odor Compounds in Subtropical Water Supply Reservoirs and Their Fates in Water Treatment Plants

Occurrence and Distribution of Taste and Odor Compounds in Subtropical Water Supply Reservoirs and Their Fates in Water Treatment Plants

Xiuzhi Bai, Ting Zhang, Chaoyi Wang, Dongliang Zong, Haipu Li, Zhaoguang Yang

Environ Sci Pollut Res Int. 2017 Jan;24(3):2904-2913.

PMID: 27844316

Abstract:

Taste and odor (T&O) problems in surface water supplies attract growing environmental and ecological concerns. In this study, 10 T&O compounds, 2-methylisoborneol (2-MIB), geosmin, β-ionone, 2-isopropyl-3-methoxypyrazine (IPMP), 2-isobutyl-3-methoxypyrazine (IBMP), 2,4,6-trichloroanisole (2,4,6-TCA), 2,3,6-trichloroanisole (2,3,6-TCA), 2,3,4-trichloroanisole (2,3,4-TCA), 2,4,6-tribromoanisole (2,4,6-TBA), and trans-2,cis-6-nonadienal (NDE) were investigated in 13 water supply reservoirs and 2 water treatment plants (WTPs) in S City of China. 2-MIB, geosmin, and β-ionone were detected in most of the reservoirs and WTPs. The highest concentrations in reservoirs reached 196.0 ng L-1 for 2-MIB, 11.4 ng L-1 for geosmin, and 39.7 ng L-1 for β-ionone. Canonical correspondence analysis (CCA) was used to examine the relationship between the 3 T&O compounds and environmental parameters of the reservoirs. The results showed that TP was strongly positively correlated with 2-MIB in wet season and negatively correlated in dry season. It was suggested that controlling nutrient (TP, TN/TP, and NH3-N) inputs was required for better management of drinking water reservoirs. Furthermore, the maximum concentrations in raw water of WTPs was kept at 82.1 ng L-1 for 2-MIB, 5.6 ng L-1 for geosmin, and 66.1 ng L-1 for β-ionone. β-Ionone could not be detected in the post-filtration and finished water of two WTPs, and both 2-MIB and geosmin significantly decreased in the water of XWTP. It was indicated that T&O compounds could be removed partly or completely by the filtration of conventional treatment processes.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP24683009	2-Isobutyl-3-methoxypyrazine		24683-00-9	Price
AP557482	trans-2,cis-6-Nonadienal		557-48-2	Price

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