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Assessment of pollution levels and human health risk of heavy metals in dust deposited on Yerevan＇s tree leaves (Armenia)

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Acta Geochimica 2017年第1期36卷 16-26页

作者： N. Maghakyan G. Tepanosyan O. Belyaeva L. Sahakyan A. Saghatelyan Department of Environmental Geochemistry Center for Ecological-Noosphere Studies of the National Academy of Sciences Abovian-68 0025 Yerevan Republic of Armenia

The total concentrations of Cd,As,Pb,Cr,Ni,Co,Zn,Cu,Ag,Hg,and Mo were determined in the atmospheric dust of the city of Yerevan by atomic absorption spectrometry(AAnalyst PE 800).Heavy metal pollution levels were evaluated by calculating geo-accumulation(I_(geo)) and summary pollution(Z_c) *** human health risk was assessed using the United States Environmental Protection agency's human health risk assessment *** results show that mean contents of all elements tested except Ni and Cr were substantially higher than local geochemical background *** to the I_(geo),Yerevan territory is strongly-to-extremely polluted by As,Ag,Hg,Mo,and *** Z_c assessment indicated that very high pollution was detected in 36%of samples,high in 32%,average in 12%,and low in 20%.The health risk assessment revealed a noncarcinogenic risk(HI >1) for children at 13 samplings sites and for adults at one sampling *** children the risk was due to elevated levels of Mo,Cd,Co,and As,while for adults,only *** risk(>1:1,000,000) of As and Cr via ingestion pathway was observed in 25 and 14 samples,*** study,therefore,is the base for further detailed investigations to organize problematic site remediation and risk reduction measures.

关键词： Urban dust Heavy metals pollution levels Health risk assessment

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Global Alliance against Chronic Respiratory Diseases demonstration project:aerosol pollution and its seasonal peculiarities in primary schools of Vilnius

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Chinese Medical Journal 2020年第13期133卷 1516-1525页

作者： Nina Prokopciuk Ulrich Franck Vadimas Dudoitis Nikolaj Tarasiuk Izabele Juskiene Daiva Cepuraite Kestutis Staras Algirdas Valiulis Vidmantas Ulevicius Arunas Valiulis department of Environmental Research SRI Center for Physical Sciences and TechnologyVilniusLT-02300Lithuania Department of Public Health Institute of Health Sciencesand Department of Children's DiseasesInstitute of Clinical MedicineVilnius University Faculty of MedicineVilniusLT-03101Lithuania Department of Environmental Immunology Helmholtz Centre for Environmental Research-UFZLeipzigGE-04318Germany Department of Public Administration Mykolas Romeris UniversityVilnius Centro Outpatient ClinicVilniusLT-01117Lithuania Department of Public Health Vilnius University Faculty of MedicineVilnius Centro Outpatient ClinicVilniusLT-01117Lithuania Department of Rehabilitation Physical and Sports MedicineVilnius University Medical FacultyInstitute of Health SciencesVilniusLT-03101Lithuania

Background:The growing public health concern caused by non-communicable diseases in urban surroundings cannot be solved by health care alone;therefore a multidisciplinary approach is *** study aimed to evaluate the airborne aerosol pollution level in primary schools as possible factor influencing origin and course of the diseases in ***:Seasonal aerosol particle number concentration(PNC)and mass concentration(PMC)were studied in the randomly selected eleven primary schools in the Lithuanian capital,Vilnius,as model of a middle-size Eastern European *** PNC in the size range from 0.01 to>1.0μm in diameter was measured using a condensation particle *** an optical particle sizer,PNC was measured and PMC estimated for particles from 0.3 to 10.0μm.A descriptive statistics was used to estimate the aerosol pollution ***:During all seasons,local cafeterias in the absence of ventilation were the main sources of the elevated levels of indoor PMC and PNC(up to 97,500 particles/cm3).The other sources of airborne particulates were the children’s activity during the lesson breaks with PMC up to 586μg/*** furniture,carpets in the classrooms and corridors were responsible for PMC up to 200μg/*** aerosol pollution(up to 18,170 particles/cm3)was higher for schools in city *** air pollution in classrooms also resulted from intermittent sources,such as construction work during classes(200-1000μg/m3)and petrol-powered lawn trimmers(up to 66,400 particles/cm3).Conclusion:The results of our survey show that even in a relatively low polluted region of Eastern Europe there are big differences in aerosol pollution within middle-sized *** efforts are needed to improve air quality in schools:more frequent wet cleaning,monitoring the operation of ventilation systems,a ban on construction works during school year,on a use of sandblasting mechanisms in the neighborhood of schools.

关键词： Children Indoor aerosol pollution levels Primary school Systematic and occasional sources Ventilation

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