Volume 5, No. 2, December 2005, Pages 154-170 PDF(412 KB)
Characterization of Both MTBE and BTEX in the Ambient Air of Night Markets in Southern Taiwan
Lien-Te Hsieha, Hsi-Hsien Yangb, Ho-Wen Chenb
a Department of Environmental Engineering and Science, National Pingtung University of Science and Technology, Nei Pu 912, Ping Tung, Taiwan
b Department of Environmental Engineering and Management, Chaoyang University of Technology, 168 Jifong E. Rd, Wufong, Taichung County, Taiwan
To characterize concentrations of volatile organic compounds (VOCs) at the night markets in southern Taiwan, four representative night markets and one background location were selected for this study. The VOCs measured included methyl tertiary-butyl ether (MTBE) and BTEX (the acronym for benzene, toluene, ethylbenzene, and xylene). The results indicated that the measured concentrations of MTBE and BTEX were typically on the order of one to two times higher at night market level than at the background site. It is clear that the night market activities in all sampling sites affected the distribution of MTBE and BTEX. During non-night market activities, the average MTBE-BTEX ratios of Liu-Ho, Rui-Guang, Ping-Tung and Chao-Zhou were (13.9: 2.2: 10.1: 1.0: 6.1), (4.9: 3.8: 13.7: 1.0: 7.9), (10.3: 1.7: 8.2: 1.0: 3.9) and (87.4: 10: 46: 1.0: 9.1), respectively. However, during the night market activities, the average MTBE-BTEX ratios shifted to (27.4: 1.9: 21.9: 1.0: 4.3), (23.1: 3.9: 16.5: 1.0: 3.2), (38.6: 6.8: 30.1: 1.0: 14.9), and (38.6: 7.8: 24.3: 1.0: 5.1), respectively.
MTBE; BTEX; Night market; VOCs; Correlation.