Characteristics of Polychlorinated Dibenzo-p-dioxins, Dibenzofurans and Metal Elements in Flue gas, Indoor air and Outdoor air of Municipal Solid Waste Incineration Plants

• Main Authors: Jiun-Shiang Jang, 張俊祥
• Other Authors: Wen-Jhy Lee
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/51698092110641142361

碩士 === 國立成功大學 === 環境工程學系碩博士班 === 91 === This study investigates the characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and metal elements in the stack flue gases, indoor air and outdoor air of two municipal solid waste incinerators (MSWIs, B and M). This work primarily attempts to set up information on the health assessment of PCDD/Fs and metal elements emitted from B and M. Additionally, this investigation assesses the influence of B and M emissions on outdoor air. This study reaches the following conclusions: First, mean PCDD/F concentrations in the stack flue gases of B and M were 0.0361 and 0.157 ng I-TEQ/Nm3, respectively. Second, Cu, Zn, Cd, Pb, Hg concentrations in the stack flue gases of B in seasons one and two were 0.03, 0.726, 0.007, 0.116 and 0.009 mg/Nm3 and 0.00466, 0.123, 0.000977, 0.0200 and 0.0199 mg/Nm3, respectively, while those of M were 0.015, 0.162, 0.007, 0.127 and 0.009 mg/Nm3 and 0.0107, 0.205, 0.0006, 0.0528 and 0.0009 mg/Nm3, respectively. Third, the PCDD/F concentrations in outdoor air of B and M ranged from 0.0315 to 0.206 pg I-TEQ/Nm3 (mean = 0.0917 pg-I-TEQ/Nm3), and from 0.0102 to 0.0986 pg I-TEQ/Nm3 (mean = 0.0464 pg I-TEQ/Nm3), respectively. Fourth, using multivariate exploratory techniques (cluster and factor analysis) to compare the congener profiles of PCDD/Fs in the stack flue gases and outdoor air with the equal concentration contours of PCDD/Fs in MSWIs outdoor air, demonstrated that B and M had a minimal influence on the surrounding environment. Five, the mean concentrations of Cu, Zn, Cd, Pb, Hg in outdoor air of B during the first and second seasons were 0.0903, 0.265, 0.0015 and 0.0584 μg/Nm3, ND and 0.128, 1.01, 0.00733 and 0.0521 μg/Nm3, ND, respectively, while those of Cu, Zn, Cd, Pb, Hg in outdoor air of M were 0.0619, 0.0945, 0.00056 and 0.0240 μg/Nm3, ND and 0.106, 0.168, 0.00162 and 0.0121 μg/Nm3, ND, respectively. Sixth, mean PCDD/Fs concentrations in the indoor air of B in seasons one and two were 2.26 and 0.295 pg I-TEQ/Nm3, respectively, while those of M were 0.402 and 0.126 pg I-TEQ/Nm3, respectively. Seventh, the mean concentrations of Cu, Zn, Cd, Pb, Hg in the indoor air of B in seasons one and two were 0.394, 5.08, 0.0355, 1.01 and 0.0052 μg/Nm3 and 0.235, 1.89, 0.0424, 0.593 and 0.00478 μg/Nm3, respectively, while those of M were 0.592, 0.425, 0.0043, 0.171 and 0.00017 μg/Nm3 and 0.395, 2.12, 0.0155 and 0.396 μg/Nm3, ND, respectively. Eighth, the PCDD/F concentrations in the stack flue gases of B were 15 and six times higher than in the outdoor air of B during seasons one and two, respectively. Notably, the PCDD/F concentrations in the stack flue gases of M were five and seven times higher than in the outdoor air of M in seasons one and two, respectively. Consequently, further research should be conducted on the exposure of laborers to PCDD/Fs the health implications of such exposure. Ninth, the mean concentrations of Cr, As, Cd, Pb in the indoor air of B were 5.3, 5.5, 23.6, 17.3 times and 7.0, 0.92, 5.8, 11.4 times higher than in the outdoor air of B in seasons one and two, respectively. Finally, the mean concentrations of Cr, As, Cd, Pb in the indoor air of M were 1.9, 1.6, 7.7 and 7.1 times and 0.72, 1.8, 9.6 and 32.7 times higher than in the outdoor air of M during seasons one and two, respectively.