Reaction kinetics and molecular characterization of the compounds formed by photosensitized degradation of the plastic additive bisphenol A in the atmospheric aqueous phase DOI Creative Commons
Yi-ting Wang,

Qingxin Deng,

Yiqun Wang

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 30, 2024

Bisphenol A (BPA, 4,4'-(propane-2,2-diyl)diphenol) is a common plasticizer that very widespread in the environment and also found at significant concentrations global oceans, due to contamination by plastics. Here we show triplet sensitization an important degradation pathway for BPA natural surface waters, which could prevail if water dissolved organic carbon above 2–3 mgC L−1. Bromide levels as per seawater conditions have potential slow down photodegradation, phenomenon not be offset reaction of with Br2•− (second-order rate constant (2.54 ± 0.09) × 108 M−1 s−1). Ultra-high resolution mass spectrometry revealed presence inorganic salts (NaCl NaBr) markedly increased complexity observed CHO product compounds formed upon photosensitized BPA. The obtained results suggest bisphenols can efficiently removed reactions generate higher number oligomers polyaromatic sea liquid marine aerosols compared freshwaters and/or dilute cloud-water. Considering absorb solar actinic radiation, these significantly affect consequently influence light-absorbing properties and, ultimately, Earth's radiative balance.

Language: Английский

Daytime Production of Airborne Pollutants Including Brown Carbon by NO2 Interaction With Surface Microlayer of Lake Water in Southwestern China DOI

Qingxin Deng,

Bowen He, Yiqun Wang

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 130(1)

Published: Dec. 28, 2024

Abstract Surface microlayer at freshwater (rivers, lakes, ponds, streams, and groundwater) seawater is abundant with organic compounds compared to subsurface water. These organics adsorbed the air‐water interface can interact atmospheric oxidants influence exchange of materials between water atmosphere. Here, we assess chemical interaction gaseous NO 2 authentic surface microlayers collected lake (Dianchi Lake) situated in China. The formation gas‐phase product was evaluated real time using a novel secondary electrospray ionization ultrahigh‐resolution quadrupole Orbitrap mass spectrometer (SESI‐UHR‐MS) upon exposure (20 or 50 ppb) dark under simulated sunlight irradiation two different temperatures: 5°C 25°C. obtained results revealed that sampling sites impacted by human activities (municipal sewage agricultural activities) significantly impact number composition formed compounds. nitrogen (N)‐containing observed as well, which contain most likely nitro amino functional groups, alternatively, they could be aromatic N‐containing may contribute “brown carbon” act light‐absorbing compounds, thus influencing radiative forcing aerosols

Language: Английский

Citations

0
Reaction kinetics and molecular characterization of the compounds formed by photosensitized degradation of the plastic additive bisphenol A in the atmospheric aqueous phase DOI Creative Commons
Yi-ting Wang,

Qingxin Deng,

Yiqun Wang

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 30, 2024

Bisphenol A (BPA, 4,4'-(propane-2,2-diyl)diphenol) is a common plasticizer that very widespread in the environment and also found at significant concentrations global oceans, due to contamination by plastics. Here we show triplet sensitization an important degradation pathway for BPA natural surface waters, which could prevail if water dissolved organic carbon above 2–3 mgC L−1. Bromide levels as per seawater conditions have potential slow down photodegradation, phenomenon not be offset reaction of with Br2•− (second-order rate constant (2.54 ± 0.09) × 108 M−1 s−1). Ultra-high resolution mass spectrometry revealed presence inorganic salts (NaCl NaBr) markedly increased complexity observed CHO product compounds formed upon photosensitized BPA. The obtained results suggest bisphenols can efficiently removed reactions generate higher number oligomers polyaromatic sea liquid marine aerosols compared freshwaters and/or dilute cloud-water. Considering absorb solar actinic radiation, these significantly affect consequently influence light-absorbing properties and, ultimately, Earth's radiative balance.

Language: Английский

Citations

0