Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning
Polarity distribution of water-soluble organic matter (WSOM) is an important factor in determining the hygroscopic and cloud nucleation abilities of organic aerosol particles. We applied a novel framework to quantitatively classify WSOM based on the 1-octanol-water partition coefficient (KOW), which...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2021
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| Online Access: | https://hdl.handle.net/10356/146630 |
| _version_ | 1811696073336422400 |
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| author | Lee, Wen-Chien Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Shiodera, Satomi Kuwata, Mikinori |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Lee, Wen-Chien Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Shiodera, Satomi Kuwata, Mikinori |
| author_sort | Lee, Wen-Chien |
| collection | NTU |
| description | Polarity distribution of water-soluble organic matter (WSOM) is an important factor in determining the hygroscopic and cloud nucleation abilities of organic aerosol particles. We applied a novel framework to quantitatively classify WSOM based on the 1-octanol-water partition coefficient (KOW), which often serves as a proxy of polarity. In this study, WSOM was generated in a laboratory biomass-burning experiment by smoldering of Indonesian peat and vegetation samples. The fractionated WSOM was analyzed using a UV-visible spectrophotometer, spectrofluorometer, and time-of-flight aerosol chemical speciation monitor. Several deconvolution methods, including positive matrix factorization, parallel factor analysis, and least-squares analysis, were applied to the measured spectra, resulting in three classes of WSOM. The highly polar fraction of WSOM, which predominantly exists in the range of log KOW < 0, is highly oxygenated and exhibits similar optical properties as those of light-absorbing humic-like substances (HULIS, termed after the humic substances due to the similarity in chemical characteristics). WSOM in the least-polar fraction, which mainly distributes in log KOW > 1, mostly consists of hydrocarbon-like and high molecular weight species. In between the most- and least-polar fraction, WSOM in the marginally polar fraction likely contains aromatic compounds. The analyses have also suggested the existence of HULIS with different polarities. Comparison with previous studies indicates that only WSOM in the highly polar fraction (log KOW < 0) likely contributes to water uptake. |
| first_indexed | 2024-10-01T07:33:34Z |
| format | Journal Article |
| id | ntu-10356/146630 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:33:34Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1466302021-03-03T07:56:15Z Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning Lee, Wen-Chien Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Shiodera, Satomi Kuwata, Mikinori School of Physical and Mathematical Sciences Asian School of the Environment Earth Observatory of Singapore Science::Chemistry Absorption Aerosols Polarity distribution of water-soluble organic matter (WSOM) is an important factor in determining the hygroscopic and cloud nucleation abilities of organic aerosol particles. We applied a novel framework to quantitatively classify WSOM based on the 1-octanol-water partition coefficient (KOW), which often serves as a proxy of polarity. In this study, WSOM was generated in a laboratory biomass-burning experiment by smoldering of Indonesian peat and vegetation samples. The fractionated WSOM was analyzed using a UV-visible spectrophotometer, spectrofluorometer, and time-of-flight aerosol chemical speciation monitor. Several deconvolution methods, including positive matrix factorization, parallel factor analysis, and least-squares analysis, were applied to the measured spectra, resulting in three classes of WSOM. The highly polar fraction of WSOM, which predominantly exists in the range of log KOW < 0, is highly oxygenated and exhibits similar optical properties as those of light-absorbing humic-like substances (HULIS, termed after the humic substances due to the similarity in chemical characteristics). WSOM in the least-polar fraction, which mainly distributes in log KOW > 1, mostly consists of hydrocarbon-like and high molecular weight species. In between the most- and least-polar fraction, WSOM in the marginally polar fraction likely contains aromatic compounds. The analyses have also suggested the existence of HULIS with different polarities. Comparison with previous studies indicates that only WSOM in the highly polar fraction (log KOW < 0) likely contributes to water uptake. Nanyang Technological University National Research Foundation (NRF) We acknowledge Patrick Martin for permitting us to use the UV–vis and fluorescence spectrometers. We thank Yongli Zhou, Ashleen S. Y. Tan, and Liudongqing Yang for assistance with the UV–vis and fluorescence measurement, Xin Wang for designing the graphical abstract, and Pavel Adamek for English editing. We also thank Dr. Haris Gunawan for supporting sample collection in Indonesia. This research was supported by the National Research Foundation Singapore under its Singapore NRF Fellowship scheme (National Research Fellow Award, NRF2012NRF-NRFF001-031), NRF Campus for Research Excellence and Technological Enterprise (CREATE) Programme, the Earth Observatory of Singapore (EOS), Nanyang Technological University, and the Research Institute for Humanity and Nature (RIHN) (Project ID 14200117). 2021-03-03T07:56:15Z 2021-03-03T07:56:15Z 2019 Journal Article Lee, W.-C., Chen, J., Budisulistiorini, S. H., Itoh, M., Shiodera, S., & Kuwata, M. Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning. Environmental Science and Technology, 53(14), 8047-8056. doi:10.1021/acs.est.9b01691 0013-936X 0000-0001-7733-8091 0000-0002-8994-4694 https://hdl.handle.net/10356/146630 10.1021/acs.est.9b01691 31194524 2-s2.0-85069948690 14 53 8047 8056 en NRF2012NRF-NRFF001-03 Environmental Science and Technology © 2019 American Chemical Society. All rights reserved. |
| spellingShingle | Science::Chemistry Absorption Aerosols Lee, Wen-Chien Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Shiodera, Satomi Kuwata, Mikinori Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning |
| title | Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning |
| title_full | Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning |
| title_fullStr | Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning |
| title_full_unstemmed | Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning |
| title_short | Polarity-dependent chemical characteristics of water-soluble organic matter from laboratory-generated biomass-burning revealed by 1-octanol-water partitioning |
| title_sort | polarity dependent chemical characteristics of water soluble organic matter from laboratory generated biomass burning revealed by 1 octanol water partitioning |
| topic | Science::Chemistry Absorption Aerosols |
| url | https://hdl.handle.net/10356/146630 |
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