title: Occurrence and distribution of taste and odor compounds in subtropical water supply reservoirs and their fates in water treatment plants.
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-1for 2-MIB, 11.4 ng L-1for geosmin, and 39.7 ng L-1for 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-1for 2-MIB, 5.6 ng L-1for geosmin, and 66.1 ng L-1for 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.
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, People's Republic of China.
authors.forename: Xiuzhi
authors.initials: X
authors.lastname: Bai
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, People's Republic of China. zhangting@csu.edu.cn.
authors.forename: Ting
authors.initials: T
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, People's Republic of China.
authors.forename: Chaoyi
authors.initials: C
authors.lastname: Wang
authors.affiliation: Shenzhen Water Quality Testing Center, Shenzhen, Guangdong, 518057, People's Republic of China.
authors.forename: Dongliang
authors.initials: D
authors.lastname: Zong
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, People's Republic of China.
authors.forename: Haipu
authors.initials: H
authors.lastname: Li
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, People's Republic of China. zgyang3@gmail.com.|Shenzhen Research Institute of Central South University, Shenzhen, Guangdong, 518057, People's Republic of China. zgyang3@gmail.com.
authors.forename: Zhaoguang
authors.initials: Z
authors.lastname: Yang
mesh_terms: D000840:Anisoles; D001892:Camphanes / Q000032:analysis; D002681:China; D005374:Filtration; D009284:Naphthols / Q000032:analysis; D045792:Norisoprenoids; D009812:Odorants; D011719:Pyrazines; D013649:Taste; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification; D014881:Water Supply
chemical_list: D000840:Anisoles; D001892:Camphanes; D009284:Naphthols; D045792:Norisoprenoids; D011719:Pyrazines; D014874:Water Pollutants, Chemical; C024267:2-isopropyl-3-methoxypyrazine; C005536:2-methylisoborneol; C110228:2,4,6-trichloroanisole; C008157:beta-ionone; C484217:2,4,6-tribromoanisole; C001278:geosmin; C034376:2-isobutyl-3-methoxypyrazine
keywords: 2-methylisoborneol; Geosmin; Reservoir; Taste and odor; Water treatment plant; β-ionone