Comprehensive characterizations of HULIS in fresh and secondary emissions of crop straw burning

Huo, Yaoqiang; Wang, Yin; Qi, Weiming; Jiang, Meihe; Li, Min

doi:10.1016/j.atmosenv.2021.118220

Cited by 18 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concentration of HULIS is reported from <1 μg m −3 to >13 μg m −3 , accounting for 9%–72% of water‐soluble OC (Fan et al., 2016; Zheng et al., 2013). Reported MAE and AAE of HULIS range from 0.63 to 2.5 m 2 gC −1 at 365 nm and from 4 to 7, respectively (Fan et al., 2016; Hoffer et al., 2006; Huo et al., 2021; Kumar et al., 2017; J. Sun et al., 2021).…”

Section: Brc Sources Chemical Composition and Its Measurement Techniquesmentioning

confidence: 99%

Review of Brown Carbon Aerosols in China: Pollution Level, Optical Properties, and Emissions

Zhou

Zhu

et al. 2022

JGR Atmospheres

View full text Add to dashboard Cite

Brown carbon (BrC) is conventionally defined as a collection of substantially light-absorbing organic aerosols (OAs; Andreae & Gelencsér, 2006). In contrast to black carbon (BC), the absorption of BrC has a strong wavelength dependence, which peaks in the ultraviolet (UV) spectral region and declines through the visible spectral region (Andreae & Gelencsér, 2006). Atmospheric BrC plays a substantial role in the earth-atmosphere energy balance. It can scatter and absorb solar radiation (direct effect), modify cloud properties and lifetime through acting as cloud condensation nuclei (indirect effect), and heat the cloud layers (semi-direct effect; Alexander

show abstract

Section: Brc Sources Chemical Composition and Its Measurement Techniquesmentioning

confidence: 99%

Review of Brown Carbon Aerosols in China: Pollution Level, Optical Properties, and Emissions

Zhou

Zhu

et al. 2022

JGR Atmospheres

View full text Add to dashboard Cite

show abstract

“…However, nearly half of the straw is burned resulting in a huge impact on the environment. [ 2 , 3 ] Rice is a typical Si‐accumulating plant, and the Si content in the shoot can be up to about 10 %. [ 4 , 5 ] Thus, rice straw is composed of cellulose, hemicellulose, lignin, and a significant amount of Si, and the biogenic silicon has attracted considerable interest.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Treatments on the Structure and Conversion of Silicon Species in Rice Straw to Tetraethyl Orthosilicate (TEOS)

Sun

Feng

et al. 2023

ChemistryOpen

View full text Add to dashboard Cite

The production of tetraethyl orthosilicate (TEOS) from biomass provides a new way for TEOS production and biomass valorization. In this study, rice straw was treated using different fractionation methods, and the content, state, and reactivity of Si in the treated samples were investigated. It was found that acid treatment and ethanol extraction kept most Si in the biomass, while alkali treatment caused significant Si loss. Si was mainly present in the SiOx, Si−O−C, and Si−O−Si states in the surface of raw rice straw, cellulose and Klason lignin. The results showed that the Si−O−Si state in rice straw was beneficial for the formation of TEOS. The removal of lipids from rice straw facilitated the production of TEOS, giving the highest TEOS yield of 76.2 %. In contrast, the production of TEOS from other samples became difficult; the simultaneous conversion of the three organic components of rice straw also facilitated the production of TEOS.

show abstract

“…The chemical composition of atmospheric HULIS exhibit significant heterogeneity and typically comprises macromolecular compounds containing aromatic rings with highly conjugated structures, as well as long-chain hydrocarbon with polar groups (e.g., -OH, -COOH, -NO2) (Fan et al, 2013;Huo et al, 2021). To unravel the structural characteristics and properties of HULIS, a range of analytical techniques, including absorption and fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy ( 1 H NMR), have been https://doi.org/10.5194/egusphere-2023-2029 Preprint.…”

Section: Introductionmentioning

confidence: 99%

“…CC BY 4.0 License. utilized (Huo et al, 2021;Qin et al, 2022;Zou et al, 2020). These studies have provided insights into the overall structural characteristics of complex HULIS, including their abundances, chemical and optical characteristics (Huo et al, 2021;Mukherjee et al, 2020;Win et al, 2018;Zhang et al, 2022b;Zheng et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…utilized (Huo et al, 2021;Qin et al, 2022;Zou et al, 2020). These studies have provided insights into the overall structural characteristics of complex HULIS, including their abundances, chemical and optical characteristics (Huo et al, 2021;Mukherjee et al, 2020;Win et al, 2018;Zhang et al, 2022b;Zheng et al, 2013). In recent years, high-resolution mass spectrometry (HRMS) techniques, such as Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) and orbitrap HRMS, in combination with electrospray ionization (ESI), have emerged as powerful tools for elucidating the molecular-level characteristics of HULIS (Lin et al, 2012;Sun et al, 2021;Wang et al, 2019;Zou et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Distribution, chemical and molecular composition of high and low-molecular-weight humic-like substances in ambient aerosols

Fan,

Cheng,

et al. 2023

Preprint

View full text Add to dashboard Cite

Abstract. Humic-like Substances (HULIS) encompass a continuum of molecular weight (MW) ranges, yet our understanding of how HULIS characteristics vary with MW is still limited and not well-established. In this study, a combination of ultrafiltration and solid-phase extraction protocols was employed to fractionate the high MW (HMW, >1 kDa) and low MW (LMW, < 1kDa) HULIS fractions from ambient aerosols collected during summer and winter at a rural site. Subsequently, comprehensive characterization by using total organic carbon, high-performance size exclusion chromatography (HPSEC), UV-vis and fluorescence spectroscopy, Fourier-transform infrared spectroscopy (FTIR), negative electrospray ionization high resolution mass spectrometry (ESI- HRMS) were conducted. The results revealed that HMW HULIS were dominated by larger-sized chromophores, substantially constituting a higher fraction of total organic carbon and UV absorption at 254 nm than LMW HULIS. While both HMW and LMW HULIS shared similar fluorophore types and functional groups, the former exhibited higher levels of humification and a greater presence of polar functional groups (e.g., -COOH, >C=O). HRMS analysis further unveiled that molecular formulas within HMW HULIS generally featured smaller sizes but higher degrees of unsaturation and aromaticity compared to those within LMW HULIS fractions. This observation suggests the possibility of small molecules assembling to form the HMW HULIS through intermolecular weak forces. Moreover, HMW HULIS contained a higher proportion of CHON but fewer CHO compounds than LMW HULIS. In both HMW and LMW HULIS, the unique molecular formulas were primarily characterized by lignin-like species, yet the former displayed a prevalence of N-enriched and highly aromatic species. Additionally, HMW HULIS contained more unique lipids-like compounds, while LMW HULIS exhibited a distinct presence of tannin-like compounds. These findings provide valuable insights into the distribution, optical properties, and molecular-level characteristics of HULIS in atmospheric aerosols, thereby advancing our understanding of their sources, composition, and environmental implications.

show abstract

Comprehensive characterizations of HULIS in fresh and secondary emissions of crop straw burning

Cited by 18 publications

References 38 publications

Review of Brown Carbon Aerosols in China: Pollution Level, Optical Properties, and Emissions

Review of Brown Carbon Aerosols in China: Pollution Level, Optical Properties, and Emissions

Influence of Different Treatments on the Structure and Conversion of Silicon Species in Rice Straw to Tetraethyl Orthosilicate (TEOS)

Distribution, chemical and molecular composition of high and low-molecular-weight humic-like substances in ambient aerosols

Contact Info

Product

Resources

About