Characteristics and source apportionment of some halocarbons in Hangzhou, eastern China during 2021

被引：6

作者：

Li, Xinhe ^{[1
]}

Li, Bowei ^{[1
]}

Yang, Yang ^{[1
]}

Hu, Liting ^{[1
]}

Chen, Di ^{[1
]}

Hu, Xiaoyi ^{[1
]}

Feng, Rui ^{[1
]}

Fang, Xuekun ^{[1
,2
,3
]}

机构：

[1] Zhejiang Univ, Coll Environm & Resource Sci, Hangzhou 310058, Zhejiang, Peoples R China

[2] Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100871, Peoples R China

[3] MIT, Ctr Global Change Sci, Cambridge, MA 02139 USA

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2023年 / 865卷

基金：

中国国家自然科学基金;

关键词：

Halocarbons; Observation; Concentrations; Sources; China; RIVER DELTA REGION; VOLATILE ORGANIC-COMPOUNDS; MIXING RATIOS; URBAN AREA; EMISSIONS; CHLOROFLUOROCARBONS; HYDROCHLOROFLUOROCARBONS; HYDROFLUOROCARBONS; DISTRIBUTIONS; TRAJECTORIES;

D O I：

10.1016/j.scitotenv.2022.160894

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In recent years, eastern China has been identified as an important contributor to national and global emissions of hal-ocarbons, some of which are ozone depletion substances (ODSs) that delay the recovery of the stratospheric ozone layer. However, the most recent characteristics and sources of halocarbons in eastern China remain unclear. Thus, hourly atmospheric observations of halocarbons were conducted in Hangzhou throughout 2021. The results showed that methylene chloride (CH2Cl2) was the most abundant halocarbon (2207 (25 %-75 % quantile: 1116-2848) ppt; parts per trillion) followed by chloromethane (CH3Cl) (912 (683-1043) ppt), and 1,2-dichloroethane (CH2ClCH2Cl) (596 (292-763) ppt). Then, backward trajectory and potential source contribution function (PSCF) analysis show that the emission hot spots of halocarbons were concentrated in adjacent cities in Zhejiang and neighboring provinces in eastern China. Moreover, based on positive matrix factorization (PMF) analysis, industrial emission (38.7 %), sol-vent usage (32.6 %), and the refrigeration sector and biomass burning (23.7 %) were the main sources of halocarbons (observed in this study). This study reveals high concentrations and potential sources of halocarbons in eastern China, which are important for studying the recovery of the ozone layer.

引用

页数：10

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