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Sessile methanogens dominated cathodic biofilm: Distribution and network in physiological transitions
Cai, Weiwei; Wang, Bo; Liu, Wenzong; Yao, Hong; Deng, Ye; Wang, Aijie
AbstractSevere and persistent haze events in northern China, characterized by high loading of fine aerosol especially of secondary origin, negatively impact human health and the welfare of ecosystems. However, current knowledge cannot fully explain the formation of this haze pollution. Despite field observations of elevated levels of reactive halogen species (e.g., BrCl, ClNO2, Cl-2, HBr) at several sites in China, the influence of halogens (particularly bromine) on haze pollution is largely unknown. Here, for the first time, we compile an emission inventory of anthropogenic bromine and quantify the collective impact of halogens on haze pollution in northern China. We utilize a regional model (WRF-Chem), revised to incorporate updated halogen chemistry and anthropogenic chlorine and bromine emissions and validated by measurements of atmospheric pollutants and halogens, to show that halogens enhance the loading of fine aerosol in northern China (on average by 21%) and especially its secondary components (similar to 130% for secondary organic aerosol and similar to 20% for sulfate, nitrate, and ammonium aerosols). Such a significant increase is attributed to the enhancement of atmospheric oxidants (OH, HO2, O-3, NO3, Cl, and Br) by halogen chemistry, with a significant contribution from previously unconsidered bromine. These results show that higher recognition of the impact of anthropogenic halogens shall be given in haze pollution research and air quality regulation.
KeywordReactive halogen species Secondary aerosol Haze pollution Anthropogenic bromine emission WRF-Chem
Document Type期刊论文
Affiliation1.Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China
2.Harbin Inst Technol SKLUWRE, State Key Lab Urban Water Resource & Environm, HIT, Harbin 150090, Peoples R China
3.Harbin Inst Technol Shenzhen, Environm Sci & Engn Res Ctr, Shenzhen Key Lab Organ Pollut Prevent & Control, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Cai, Weiwei,Wang, Bo,Liu, Wenzong,et al. Sessile methanogens dominated cathodic biofilm: Distribution and network in physiological transitions[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,55(20):13625-13637.
APA Cai, Weiwei,Wang, Bo,Liu, Wenzong,Yao, Hong,Deng, Ye,&Wang, Aijie.(2021).Sessile methanogens dominated cathodic biofilm: Distribution and network in physiological transitions.SCIENCE OF THE TOTAL ENVIRONMENT,55(20),13625-13637.
MLA Cai, Weiwei,et al."Sessile methanogens dominated cathodic biofilm: Distribution and network in physiological transitions".SCIENCE OF THE TOTAL ENVIRONMENT 55.20(2021):13625-13637.
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