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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/3385

    Title: Comparisons of levels of polychlorinated dibenzo-p-dioxins/dibenzofurans in the surrounding environment and workplace of two municipal solid waste incinerators
    Authors: ShihShun-I (史順益)
    Keywords: Municipal solid waste incinerator
    Surrounding environment
    Date: 2006
    Issue Date: 2009-08-14 23:20:28 (UTC+8)
    Abstract: Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the surrounding environment (outdoor) and workplace air of two municipalsolidwaste incinerators (MSWIs, T and M) were characterized and compared. T andMrepresented two typical municipal solidwaste incinerators inthe north of Taiwan, which have different processes for controlling the PCDD/F emissions. The results of this study are summarized as follows. (1)The total PCDD/F and the total PCDD/F WHO-TEQ concentrations in the workplace air were 5–13 and 5–15 times higher than those in the outdoorair, respectively. Obviously, it is worthwhile to explore more on health risk assessment for exposure of PCDD/Fs emitted from MSWIs, particularlyin the workplace air. (2) Mean total PCDD/F I-TEQ concentrations in the outdoor air ranged between 0.0216 and 0.155 pg I-TEQ/Nm3 and averaged0.0783 pg I-TEQ/Nm3 (0.0828 pg WHO-TEQ/Nm3) during two seasons for two MSWIs, which were 6.5-fold higher than that of a remote site(0.0119 pg I-TEQ/Nm3 or 0.0132 pgWHO-TEQ/Nm3) in Taiwan. However, the above outdoor air concentration levels in the MSWIs were still muchlower than the air quality limitation of PCDD/Fs (0.6 pg I-TEQ/Nm3) in Japan [http://www.env.go.jp/en/topic/pops/Appendix/00report/report.pdf].(3) PCDFs were the primary toxicity distributors for PCDD/Fs in the outdoor air, since the ratios of PCDDs/PCDFs (I-TEQ) at all samplingsites ranged from 0.180 to 0.492 and were less than unity. (4) The OCDD, OCDF, 1,2,3,4,6,7,8-HpCDD and 1,2,3,4,6,7,8-HpCDF were the fourdominant species in both workplace and outdoor air near MSWIs. (5) By spraying water on and wetting both the fly and bottom ashes, the meantotal PCDD/F I-TEQ concentration in the workplace air was reduced 86.9% in the T MSWI. The above results indicate an appropriate improvingaction did inhibit the fugitive emission of PCDD/Fs and reduce the health risk of workers during work handling ashes in MSWIs.
    Relation: Journal of Hazardous Materials, v. B137, 2006, p. 1817-1830
    Appears in Collections:[環境工程系所] 期刊論文

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