Pyrazines: A diverse class of earthy-musty odorants impacting drinking water quality and consumer satisfaction

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Pyrazines: A diverse class of earthy-musty odorants impacting drinking water quality and consumer satisfaction
	Wang, Chunmiao; Yu, Jianwei; Gallagher, Daniel L.; Byrd, Julia; Yao, Wenchuo; Wang, Qi; Guo, Qingyuan; Dietrich, Andrea M.; Yang, Min
刊名	WATER RESEARCH
	2020-09-01
卷号	182 页码:1-8
关键词	Earthy-musty odor Pyrazines Odor threshold concentrations Descriptors Occurrence Drinking water
ISSN号	0043-1354
英文摘要	The presence of earthy-musty odors in drinking water is a major concern for water suppliers and consumers worldwide. While geosmin and 2-methylisoborneol are the most studied earthy-musty odor-causing compounds, pyrazine and its alkyl and methoxy compounds possess similar odors and are widely distributed in nature, foods, and beverages. In this study, odor characteristics of pyrazines and their presence in natural and treated waters were determined. Pyrazine, 2,6-dimethyl-pyrazine (DMP), 2,3,5-trimethyl-pyrazine (TrMP), 2-ethyl-5(6)-methyl-pyrazine (EMP), 2,3,5,6-tetramethyl-pyrazine (TeMP), 2-isobutyl-3-methoxy-pyrazine (IBMP) and 2-isopropyl-3-methoxy-pyrazine (IPMP) were measured in source and finished drinking water across China. 2-Methoxy-3,5-dimethyl-pyrazine (MDMP), IBMP, and IPMP were investigated in rivers in Virginia, USA. The results showed that musty and sweet were the most common descriptors for pyrazine, DMP, MDMP, TrMP, and TeMP. While IBMP and IPMP were never detected in 140 source or drinking water samples from across China, pyrazine, DMP, MDMP, TrMP, and TeMP occurred throughout with concentrations of n.d.-62.2 ng/L-aq in source water and n.d.-39.6 ng/L-aq in finished water. IBMP, IPMP, and MDMP were present in two Virginia rivers; MDMP occurred in 18% of the samples with concentrations of n.d.-4.4 ng/L, many of which were above the aqueous odor threshold of 0.043 ng/L MDMP. The removal efficiencies through conventional water treatment were poor, ranging from negative removals to similar to 10%. Advanced oxidation water treatment could only remove EMP and TrMP. The widespread presence of earthy-musty-sweet pyrazines in source and drinking waters on two continents, their poor removal during water treatment, and ng/L odor threshold concentrations confirm their potential to be T&O issues for consumers. (C) 2020 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45350]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
推荐引用方式 GB/T 7714	Wang, Chunmiao,Yu, Jianwei,Gallagher, Daniel L.,et al. Pyrazines: A diverse class of earthy-musty odorants impacting drinking water quality and consumer satisfaction[J]. WATER RESEARCH,2020,182:1-8.
APA	Wang, Chunmiao.,Yu, Jianwei.,Gallagher, Daniel L..,Byrd, Julia.,Yao, Wenchuo.,...&Yang, Min.(2020).Pyrazines: A diverse class of earthy-musty odorants impacting drinking water quality and consumer satisfaction.WATER RESEARCH,182,1-8.
MLA	Wang, Chunmiao,et al."Pyrazines: A diverse class of earthy-musty odorants impacting drinking water quality and consumer satisfaction".WATER RESEARCH 182(2020):1-8.