03541cas|a2200421 a 4500 20260817173354.0 020520s2001 th uu|m rtt 0| a1eng d .b11855307 AIT Thesis no.EV-01-25 Buesing, Ana Maria C. Comparative study of monitoring methods for airborne organochlorine pesticides in tropical region Bangkok : Asian Institute of Technology, 2001 79 leaves Thesis ; no. EV-01-25 A thesis submitted in partial fulfillment of the requirements for the degree in Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 2001 Persistent organochlorine pesticides (POCP) in the atmosphere of Bangkok Metropolitan Region (BMR) were investigated using two different sampling methods, active and passive. The active method uses the Anderson-type low volume sampler and the passive method uses the semi-permeable membrane device (SPMD). The former could trap POCP both in the gaseous and particulate phases while the latter could sequester only the gaseous phase. Samples were collected during the rainy season from three ambient air quality monitoring stations managed and operated by the Pollution Control Department in BMR; namely: Din Daeng representing urban area; Bangkok University, semi-urban/rural area; and Bang Na, residential/industrial mixed area. Analysis was done for 16 POCP following USEPA T0-4A method (for active) and SPMD Analytical Guide (for passive) using GC/ECD. Results of the investigation show that, even in rainy season, the BMR atmosphere is contaminated with traces of POCP, ranging from less than ng/m3 to a few ng/m3 . Most of the POCP were present in the gaseous form. Between the two methods use, the active yielded satisfactory results since it trapped more POCP than SPMD. Hence, it is recommended for use in the tropical conditions. The potential of SPMD as an alternative method could not be negated, especially if calibrated uptake rates specific for POCP could be established. Its main advantage over the other method is that it can be deployed even in remote areas where electricity is lacking. Organochlorine compounds Pesticides Environmental aspects Nguyen, Thi Kim Oanh, Chairperson Visvanathan, C., Examination Committee Preeda Pakpian, Examination Committee Danish International Development Assistance (DANIDA), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-01-25 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08384 .b11855307 mnait u 240402 0 020520 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120711121 CREATED : 2000-12-21 RECORD # : i12282777 LPATRON : 1018547 LCHKIN : 2007-01-02 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 11 TOT RENEW : 10 Barcode : 30050120711113 CREATED : 2000-12-21 RECORD # : i12282789 LPATRON : 1018459 LCHKIN : 2006-04-28 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 5 TOT RENEW : 7 Barcode : 30050160076922 CREATED : 2016-05-24 RECORD # : i1298971x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 19725 19725 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-01-25 30050120711121 2026-08-17 17:33:54 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-01-25 30050120711113 2026-08-17 17:33:54 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-01-25 30050160076922 2026-08-17 17:33:54 2026-08-17 40