Enhanced Nitrite Production from the Aqueous Photolysis of Nitrate in the Presence of Vanillic Acid and Implications for the Roles of Light-Absorbing Organics

doi:10.1021/acs.est.1c04642

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	Enhanced Nitrite Production from the Aqueous Photolysis of Nitrate in the Presence of Vanillic Acid and Implications for the Roles of Light-Absorbing Organics
	Wang, Yalin 8,9; Huang, Dan Dan 7; Huang, Wanyi 8,9; Liu, Ben 8,9; Chen, Qi 5,6; Huang, Rujin 4; Gen, Masao 3; Mabato, Beatrix Rosette Go 2; Chan, Chak K.2; Li, Xue 1
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2021-12-07
卷号	55 期号:23 页码:15694-15704
关键词	nitrate photolysis HONO formation brown carbon photosensitization effective quantum yield aqueous aerosol particles
ISSN号	0013-936X
DOI	10.1021/acs.est.1c04642
通讯作者	Li, Yong Jie(yongjieli@um.edu.mo)
英文摘要	A prominent source of hydroxyl radicals ((OH)-O-center dot), nitrous acid (HONO) plays a key role in tropospheric chemistry. Apart from direct emission, HONO (or its conjugate base nitrite, NO2-) can be formed secondarily in the atmosphere. Yet, how secondary HONO forms requires elucidation, especially for heterogeneous processes involving numerous organic compounds in atmospheric aerosols. We investigated nitrite production from aqueous photolysis of nitrate for a range of conditions (pH, organic compound, nitrate concentration, and cation). Upon adding small oxygenates such as ethanol, n-butanol, or formate as (OH)-O-center dot scavengers, the average intrinsic quantum yield of nitrite [Phi-(NO2-)] was 0.75 +/- 0.15%. With near-UV-light-absorbing vanillic acid (VA), however, the effective Phi(NO2-) was strongly pHdependent, reaching 8.0 +/- 2.1% at a pH of 8 and 1.5 +/- 0.39% at a more atmospherically relevant pH of 5. Our results suggest that brown carbon (BrC) may greatly enhance the nitrite production from the aqueous nitrate photolysis through photosensitizing reactions, where the triplet excited state of BrC may generate solvated electrons, which reduce nitrate to NO2 for further conversion to nitrite. This photosensitization process by BrC chromophores during nitrate photolysis under mildly acidic conditions may partly explain the missing HONO in urban environments.
资助项目	National Natural Science Foundation of China[41675120] ; National Natural Science Foundation of China[21806108] ; National Natural Science Foundation of China[41875142] ; Science and Technology Development Fund, Macau SAR[0019/2020/A1] ; Science and Technology Development Fund, Macau SAR[MYRG2018-00006-FST] ; University of Macau
WOS关键词	NITROUS-ACID ; QUANTUM YIELDS ; BROWN CARBON ; HUMIC-ACID ; HETEROGENEOUS CONVERSION ; ATMOSPHERIC AEROSOLS ; SALICYLIC-ACID ; WINTER HAZE ; PARTICLE PH ; DIOXIDE
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000758717600015
资助机构	National Natural Science Foundation of China ; Science and Technology Development Fund, Macau SAR ; University of Macau
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/17481]
专题	地球环境研究所_粉尘与环境研究室
通讯作者	Li, Yong Jie
作者单位	1.Jinan Univ, Inst Mass Spectrometry & Atmospher Environm, Guangzhou 510632, Peoples R China 2.City Univ Hong Kong, Sch Energy & Environm, Hong Kong 999077, Peoples R China 3.Kanazawa Univ, Fac Frontier Engn, Inst Sci & Engn, Kanazawa, Ishikawa 9201192, Japan 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 5.Peking Univ, IJRC, Coll Environm Sci & Engn, Beijing 100871, Peoples R China 6.Peking Univ, State Key Joint Lab Environm Simulat & Pollut Con, BICESAT, Coll Environm Sci & Engn, Beijing 100871, Peoples R China 7.Shanghai Acad Environm Sci, Shanghai 200233, Peoples R China 8.Univ Macau, Ctr Reg Oceans, Fac Sci & Technol, Macau 999078, Peoples R China 9.Univ Macau, Dept Civil & Environm Engn, Fac Sci & Technol, Macau 999078, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yalin,Huang, Dan Dan,Huang, Wanyi,et al. Enhanced Nitrite Production from the Aqueous Photolysis of Nitrate in the Presence of Vanillic Acid and Implications for the Roles of Light-Absorbing Organics[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(23):15694-15704.
APA	Wang, Yalin.,Huang, Dan Dan.,Huang, Wanyi.,Liu, Ben.,Chen, Qi.,...&Li, Yong Jie.(2021).Enhanced Nitrite Production from the Aqueous Photolysis of Nitrate in the Presence of Vanillic Acid and Implications for the Roles of Light-Absorbing Organics.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(23),15694-15704.
MLA	Wang, Yalin,et al."Enhanced Nitrite Production from the Aqueous Photolysis of Nitrate in the Presence of Vanillic Acid and Implications for the Roles of Light-Absorbing Organics".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.23(2021):15694-15704.