Landfills are widely complained about due to the long-term odor and landfill gas emissions for local residents,while the bioaerosols are always neglected as another threat to on-site workers.In this study,bioaerosols samples were collected from the typical operation scenes in the large-scale modern landfill,and the emission levels of airborne bacteria,pathogenic species,and fungi were quantified and co-related.The corresponding exposure risks were assessed based on the average daily dose via inhalation and skin contact.It was found that the levels of culturable bacteria and fungi in all landfill samples were around 33-22778 CFU/m3 and 8-450 CFU/m3,and the active-working landfill area and the covered area were the maximum and minimum emission sources,respectively,meaning that the bioaerosols were mainly released from the areas related with the fresh waste operation.Acinetobacter sp.,Massilia sp.,Methylobacterium-Methylorubrum sp.and Noviherbaspirillum sp.were the main bacterial populations,with a percentage of 42.56％,89.82％,70.24％and 30.20％respectively in total bioaerosols measured.With regards to the health risk,the health risks via inhalation were the main potential risks,with four orders of magnitude higher than that of skin contact.Active-working area showed the critical point for non-carcinogeniic risks,with a hazard quotient of 1.68,where 80 m protection distance is recommended for on-site worker protection,plus more careful protection measures.

Yanfeng Yang;Ruina Zhang;Ziyang Lou

College of Environmental and Chemical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Shanghai Environmental Sanitation Engineering Design Institute Co.,Ltd.,Shanghai 200323,China;Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery,School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China

环境科学与工程前沿

[1]Yanfeng Yang;Ruina Zhang;Ziyang Lou-.Bioaerosol emissions variations in large-scale landfill region and their health risk impacts)[J].环境科学与工程前沿,2022(12):98-106

Bioaerosol,Landfills,bioaerosols,Methylorubrum,Noviherbaspirillum,carcinogeniic

emissions,variations,large,scale,landfill,region,their,health,impacts,widely,complained,about,due,long,term,odor,gas,local,residents,while,always,neglected,another,threat,site,workers,In,this,study,samples,were,collected,from,typical,operation,scenes,modern,levels,airborne,pathogenic,species,fungi,quantified,related,corresponding,exposure,risks,assessed,average,daily,dose,via,inhalation,skin,contact,It,found,that,culturable,all,around,CFU,active,working,covered,maximum,minimum,sources,respectively,meaning,mainly,released,areas,fresh,waste,Acinetobacter,Massilia,Methylobacterium,bacterial,populations,percentage,total,measured,With,regards,potential,four,orders,magnitude,higher,than,Active,showed,critical,point,hazard,quotient,where,protection,distance,recommended,plus,more,careful,measures

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