Chemical Mass Balance Source Apportionment of Indoor PM in Brazilian Corporate Offices and Restaurants

Abstract

We have applied the chemical mass balance air quality receptor model (CMB) to particulate matter samples collected indoors during regular working hours at six locations in and around the cities of Säo Paulo and Campinas, Säo Paulo state, Brazil. Source profiles were used to apportion indoor PMi5 to urban dust, residual oil, soft wood, natural gas, diesel emissions, charbroiled meat, brake dust, sodium chloride, and potassium nitrate. At all sites, diesels contributed a significant fraction, ranging from 10 to 45% of the PMi5 mass. In a steak house and a pizzeria, soft wood burning contributed 23 and 26% of the mass, respectively. Except for an office located in a rural area, charbroiled meat emissions comprised a significant fraction of the PM15 mass, ranging from 7% in a pizzeria to 29% in a hotel which houses a steak house and other restaurants. Natural gas contribution at the hotel was 31 % of the mass, the highest of all sites. The lowest urban dust contribution (6%) was found at the steak house and the highest ( 16 %) in a rural area.

Occurrence of Airborne Bacteria and Fungi in Bayside Offices in Rio de Janeiro, Brazil

“…Unfortunately, only very limited research has been conducted in Brazil and the participation of health professionals in studies at indoor work sites and other comprehensive research have been conspicuously lacking. At the moment a paucity of information is available on indoor and outdoor urban pollutants in Rio de Janeiro [6][7][8].…”

Occurrence of Airborne Bacteria and Fungi in Bayside Offices in Rio de Janeiro, Brazil

“…Unfortunately, only very limited research has been conducted in Brazil and the participation of health professionals in studies at indoor work sites and other comprehensive research have been conspicuously lacking. At the moment a paucity of information is available on indoor and outdoor urban pollutants in Rio de Janeiro [6][7][8].…”

Volatile Organic Compounds: Distribution in Offices and Restaurants in the Cities of Rio de Janeiro and Sâo Paulo (Brazil)

“…Traffic density near the study sites constituted the main criterion for site selec tion. Preliminary reports and a data base dealing with the usual indoor environment pollutants have already been published [8][9][10]. VOCs in Offices and Restaurants 1-8 (tables 3, 4) were too vola tile and could not be quantified in the absence of a cryogenic system (lack of focusing and frequently co-elution with the solvent).…”