RISK ASSSSMENT AND SIZE DISTRIBUTION OF PARTICULATE MATTERS FROM STREETSIDE RESTUARANTS IN NAKHON RATCHASIMA PROVINCE

Abstract

This study investigates size distribution of particulate matters (PMs) and risk assessment of respirable dust and total dust from 4 street side restaurants during cooking and non-cooking activities in Nakhon Ratchasima province.  DUST TRACK^TM DRX Aerosol Monitor was used to measure the level of the PM samples and the risk assessment was performed based on Notification of Ministry of Industry B.E. 2555. The results indicated the cooking activity led to increase emissions of PMs.  During cooling, the average PM1, PM2.5, and PM10 concentrations were 0.127, 0.133, and 0.135 mg/m³ respectively. The mean respirable dust was 0.131 mg/m³, and 0.140 mg/m³ for the total dust.  During non-cooking, the restaurants, had lower emissions, 0.066, 0.067, 0.073, 0.068, and 0.07 mg/m³, of PM1, PM2.5, PM10, respirable dust, and total dust respectively. The risk assessment matrix of respirable dust and total dust showed acceptable risk levels