南部某焚化廠排放類戴奧辛物質擴散模式及其健康風險評估之研究

A study of model diffusion and health risk assessment research in dioxin material emissions from a incineration plant in south Taiwan

賴雅婷(Ya-Ting Lai)

指導教授 ： 林信一

共同指導教授 ： 陳友剛(Yu-Kang Chen)

長榮大學/健康科學學院/職業安全與衛生學系(所)/碩士(2014年)

https://doi.org/10.6833/CJCU.2014.00178

摘要

本研究對象為南部地區永康焚化廠，運用大氣擴散模式模擬焚化爐煙道排放之廢氣經由大氣擴散後著地的濃度分佈情形，估算排放類戴奧辛濃度對模擬範圍內的居民的可能健康風險。以焚化廠煙道所排放出來的濃度推算其排放量，其2011至2013年平均乾基排放量為1457.29Nm3/min、戴奧辛排放濃度0.048ng-TEQ/Nm3，使用美國環保署所認可的大氣擴散模式ISCST3(Industrial Source Complex Short-Term Dispersion Model)，並從中央氣象局取得高空資料如氣溫、風向、風速等等，將所取得的氣象資料輸入ISCST3模式進行模擬推估焚化廠周圍空氣中戴奧辛濃度的分布之結果，長榮大學模擬範圍內其空氣中戴奧辛濃度年平均值為6.59×10-10ng/Nm3。台南火車站模擬範圍內其空氣中戴奧辛濃度年平均值6.74×10-11為ng/Nm3。新化市中心（中正忠孝路口）模擬範圍內其空氣中戴奧辛濃度年平均值為3.35×10-11ng/Nm3。
對模式所輸入之氣象輸入值進行敏感度分析，了解氣象輸入參數之變動對模式模擬結果影響之程度，輸入參數對模擬的敏感度分析結果，ISCST3模式輸入參數對模擬的敏感度分析結果調整風速比例每次變化1%來進行敏感度分析，風速每增加1%，平均濃度變化就會降低1.43%。
將模擬推估之數據帶入健康風險評估模式HRA（Health Risk Assessment），焚化廠附近居民的吸入戴奧辛暴露劑量平均值為6.35×10-7 pg-TEQ/kg/day，符合世界衛生組織公佈的戴奧辛容許暴露劑量1~4 pg-TEQ/kg/day。焚化廠附近居民吸入戴奧辛的致癌風險最大值為9.91×10-10 pg-TEQ/kg/day，低於百萬分之一(10-6)的法定標準。藉由本研究評估結果作為管制具有危害潛勢汙染物之參考依據。

關鍵字

ISCST3 ； 焚化廠 ； 戴奧辛 ； 健康風險評估

並列摘要

This study object is incineration plant for southern region, Yongkang. Use of atmosphere diffusion mode to simulate the waste gas concentration after incinerator smokestack emissions of through the atmosphere diffusion and distribution situation, estimate emissions dioxin concentration range at the residents simulation possible health risks.
Calculate out their emissions that the incineration plant flue concentration,it 2011-2013 average dry basis exhaust gas is 1457.29Nm3 / min, the concentration of dioxin emissions is 0.048ng-TEQ / Nm3, EPA approved the use of the atmospheric dispersion model ISCST3 (Industrial Source Complex Short-Term Dispersion Model), and obtain information such as altitude air temperature, wind direction, wind speed, etc. from the Central Weather Bureau, the meteorological data obtained input ISCST3 model simulation results to estimate the distribution of the incinerator dioxin concentrations in ambient air, within the range of Chang Jung Christian University simulation annual average air concentration of dioxin is 6.59×10-10 ng/Nm3, Tainan station within range of annual average air concentration of dioxin is 6.74×10-11ng/Nm3, the Xinhua downtown (CKS Zhongxiao Road) annual average air concentration of dioxin is 3.35×10-11 ng / Nm3.
The input value sensitivity analysis model of meteorological date to understand the extent of changes in meteorological input parameters affect the results of model simulations, sensitivity analysis of simulation results, ISCST3 model input parameters on the sensitivity analysis results of the simulation to adjust the wind speed ratio of 1% for each change sensitivity analysis, every 1% increase in wind speed, the change will reduce the average concentration of 1.43%.

The estimation of the simulation data into health risk assessment model HRA (Health Risk Assessment), dioxin incineration plant sucked nearby residents exposure dose of an average is 6.35 × 10-7 pg-TEQ/kg/day, Line with World Health Organization released dioxin Permissible Exposure dose 1 ~ 4 pg-TEQ/kg/day. The maximum value risk of cancer to nearby residents incineration plants Sucked dioxin of 9.91×10-10 pg-TEQ /kg/day, below the one millionth (10-6) of the statutory standards. By the results of this study to assess potential of hazards as control pollutants have reference basis.

並列關鍵字

ISCST3 ； incineration plant ； dioxin ； health risk assessment

參考文獻

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