Insights into dissolved organics in non-urban areas - Optical properties and sources

Feng Yu; Xiaofei Li; Rui Zhang; Jingning Guo; Wen Yang; Lekhendra Tripathee; Lang Liu; Yuqin Wang; Shichang Kang; Junji Cao

doi:10.1016/j.envpol.2023.121641

Insights into dissolved organics in non-urban areas - Optical properties and sources

Feng Yu
, Xiaofei Li
, Rui Zhang
, Jingning Guo
, Wen Yang
, Lekhendra Tripathee
, Lang Liu
, Yuqin Wang
, Shichang Kang
, Junji Cao

School of Human Settlements and Civil Engineering

Shaanxi University of Science and Technology
CAS - Institute of Earth Environment
CAS - Northwest Institute of Eco-Environment and Resources
Northwestern Polytechnical University Xian
University of Chinese Academy of Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Brown carbon aerosols show obvious light absorption properties in the ultraviolet–visible (UV–Vis) range, which has an important impact on photochemistry and climate. In this study, experimental samples originated from the North slope of the Qinling Mountains (at two remote suburb sites) to study the optical properties of water-soluble brown carbon (WS–BrC) in PM_2.5. The WS-BrC of TY (a sampling site on the edge of Tangyu of Mei county) has a stronger light absorption ability than CH (a rural sampling site, near the Cuihua Mountains scenic spot). The direct radiation effect of WS-BrC relative to elemental carbon (EC) is 6.67 ± 1.36% in TY and 24.13 ± 10.84% in CH in the UV range, respectively. In addition, two humic-like and one protein-like fluorophore components in WS-BrC were identified by fluorescence spectrum and parallel factor (EEMs-PARAFAC). Humification index (HIX), biological index (BIX) and fluorescence index (FI) together showed that the WS-BrC in the two sites may originate from fresh aerosol emissions. Potential source analysis of Positive Matrix Factorization (PMF) model show that the combustion process, vehicle, secondary formation and road dust are the main contributors to WS-BrC.

Original language	English
Article number	121641
Journal	Environmental Pollution
Volume	329
DOIs	https://doi.org/10.1016/j.envpol.2023.121641
State	Published - 15 Jul 2023

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

Fluorescence components
Optical properties
Qinling mountains
Source resolution
Water-soluble brown carbon

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10.1016/j.envpol.2023.121641

Cite this

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title = "Insights into dissolved organics in non-urban areas - Optical properties and sources",

abstract = "Brown carbon aerosols show obvious light absorption properties in the ultraviolet–visible (UV–Vis) range, which has an important impact on photochemistry and climate. In this study, experimental samples originated from the North slope of the Qinling Mountains (at two remote suburb sites) to study the optical properties of water-soluble brown carbon (WS–BrC) in PM2.5. The WS-BrC of TY (a sampling site on the edge of Tangyu of Mei county) has a stronger light absorption ability than CH (a rural sampling site, near the Cuihua Mountains scenic spot). The direct radiation effect of WS-BrC relative to elemental carbon (EC) is 6.67 ± 1.36\% in TY and 24.13 ± 10.84\% in CH in the UV range, respectively. In addition, two humic-like and one protein-like fluorophore components in WS-BrC were identified by fluorescence spectrum and parallel factor (EEMs-PARAFAC). Humification index (HIX), biological index (BIX) and fluorescence index (FI) together showed that the WS-BrC in the two sites may originate from fresh aerosol emissions. Potential source analysis of Positive Matrix Factorization (PMF) model show that the combustion process, vehicle, secondary formation and road dust are the main contributors to WS-BrC.",

keywords = "Fluorescence components, Optical properties, Qinling mountains, Source resolution, Water-soluble brown carbon",

author = "Feng Yu and Xiaofei Li and Rui Zhang and Jingning Guo and Wen Yang and Lekhendra Tripathee and Lang Liu and Yuqin Wang and Shichang Kang and Junji Cao",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors",

year = "2023",

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doi = "10.1016/j.envpol.2023.121641",

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T1 - Insights into dissolved organics in non-urban areas - Optical properties and sources

AU - Yu, Feng

AU - Li, Xiaofei

AU - Zhang, Rui

AU - Guo, Jingning

AU - Yang, Wen

AU - Tripathee, Lekhendra

AU - Liu, Lang

AU - Wang, Yuqin

AU - Kang, Shichang

AU - Cao, Junji

PY - 2023/7/15

Y1 - 2023/7/15

N2 - Brown carbon aerosols show obvious light absorption properties in the ultraviolet–visible (UV–Vis) range, which has an important impact on photochemistry and climate. In this study, experimental samples originated from the North slope of the Qinling Mountains (at two remote suburb sites) to study the optical properties of water-soluble brown carbon (WS–BrC) in PM2.5. The WS-BrC of TY (a sampling site on the edge of Tangyu of Mei county) has a stronger light absorption ability than CH (a rural sampling site, near the Cuihua Mountains scenic spot). The direct radiation effect of WS-BrC relative to elemental carbon (EC) is 6.67 ± 1.36% in TY and 24.13 ± 10.84% in CH in the UV range, respectively. In addition, two humic-like and one protein-like fluorophore components in WS-BrC were identified by fluorescence spectrum and parallel factor (EEMs-PARAFAC). Humification index (HIX), biological index (BIX) and fluorescence index (FI) together showed that the WS-BrC in the two sites may originate from fresh aerosol emissions. Potential source analysis of Positive Matrix Factorization (PMF) model show that the combustion process, vehicle, secondary formation and road dust are the main contributors to WS-BrC.

AB - Brown carbon aerosols show obvious light absorption properties in the ultraviolet–visible (UV–Vis) range, which has an important impact on photochemistry and climate. In this study, experimental samples originated from the North slope of the Qinling Mountains (at two remote suburb sites) to study the optical properties of water-soluble brown carbon (WS–BrC) in PM2.5. The WS-BrC of TY (a sampling site on the edge of Tangyu of Mei county) has a stronger light absorption ability than CH (a rural sampling site, near the Cuihua Mountains scenic spot). The direct radiation effect of WS-BrC relative to elemental carbon (EC) is 6.67 ± 1.36% in TY and 24.13 ± 10.84% in CH in the UV range, respectively. In addition, two humic-like and one protein-like fluorophore components in WS-BrC were identified by fluorescence spectrum and parallel factor (EEMs-PARAFAC). Humification index (HIX), biological index (BIX) and fluorescence index (FI) together showed that the WS-BrC in the two sites may originate from fresh aerosol emissions. Potential source analysis of Positive Matrix Factorization (PMF) model show that the combustion process, vehicle, secondary formation and road dust are the main contributors to WS-BrC.

KW - Fluorescence components

KW - Optical properties

KW - Qinling mountains

KW - Source resolution

KW - Water-soluble brown carbon

UR - https://www.scopus.com/pages/publications/85153473717

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DO - 10.1016/j.envpol.2023.121641

M3 - 文章

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AN - SCOPUS:85153473717

SN - 0269-7491

VL - 329

JO - Environmental Pollution

JF - Environmental Pollution

M1 - 121641

ER -

Insights into dissolved organics in non-urban areas - Optical properties and sources

Abstract

UN SDGs

Keywords

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