請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/40905
標題: | 關渡平原砷污染農地健康與生態風險評估 Health and Ecological Risk Assessment for Arsenic Contaminated Site in Guandu |
作者: | Yi-Rong He 何怡蓉 |
指導教授: | 馬鴻文 |
關鍵字: | 健康風險評估,生態風險評估,關渡平原,土壤地下水,風險商數, Health risk assessment,Ecological risk assessment,Guandu,soil and groundwater,risk quotient (RQ), |
出版年 : | 2008 |
學位: | 碩士 |
摘要: | 台北市調查土壤重金屬與地下水,發現關渡平原土壤重金屬砷濃度異常過高。關渡平原所受污染的土壤為農地,因此污染物會藉由當地作物直接吸收進入食物鏈進而影響人體健康。除了人體健康受到危害外,當地的生態系統為最直接受到暴露的受體。因此本研究利用「臺北市農地土壤重金屬砷含量調查及查證計畫」結果為評估基礎,針對關渡平原砷污染農地進行健康與生態風險評估。
健康風險評估部分,本研究評估污染場址透過土壤、空氣、地下水及食物鏈介質,估算經由直接或間接暴露途徑對受體(農民、自家栽種、鄰近居民及遊客)健康造成潛在風險危害的可能性。健康風險評估結果為鄰近居民與遊客於場址一的致癌風險與非致癌風險皆在可接受範圍之內(<10-6);而在農民及自家栽種場址一的評估結果,由於其食物鏈攝取比例較高,因此農民及自家栽種致癌風險與非致癌風險皆超過可接受範圍(>10-6)。在生態風險評估部分,本研究評估當地物種,包括稻米、蚯蚓及麻雀,其透過污染物直接吸收以及食物鏈暴露途徑所造成潛在風險危害。生態風險評估結果為稻米在三個場址中其風險皆小於毒害濃度。蚯蚓及麻雀在場址一的風險商數接近於1(RQ=0.99、0.96),其在場址二及場址三風險商數值皆未超過1。 透過本研究健康與生態風險評估結果,可做為未來管理單位對當地擬定改善、整治策略,不管是在人體健康亦或是生態系統角度上,提供其適切之管理及決策依據。 The heavy metals in the soils and the groundwater were investigated in Taipei in 2007, and found that the concentration of Arsenic is extraordinarily high in Guandu. The agricultural land is main polluted source, so the pollutant could enter the food-chain through the absorbance by the plants. Besides, the local ecosystem is the most direct receptor that exposed to the pollutant. Therefore, the study is based on the results of “Monitoring and investigation of heavy metals in soil of Taipei City”, and carries out health and ecological risk assessment in Guandu. The medium includes soil, air, groundwater and food chain on health risk assessment in this study, and the potential harmful effects of receptors were assessed by direct and indirect exposure routes. The result of health risk assessment shows that the carcinogenic and non-carcinogenic risks of residents and tourists on site 1 are less than the standard (<10-6). The carcinogenic and non-carcinogenic risks of farmers and self-contained farmers exceed the standard (>10-6). The indicators contain rice, earthworms and sparrows on ecological risk assessment in this study, and the potential harmful effects of receptors were assessed by direct and indirect exposure routes. The results show that the risk of rice in three sites is lower than toxic level. The RQs of earthworms and sparrows in site 1 are close to 1, and that in site 2 and 3 are less than 1. Health and ecological risk assessment were integrated in this study. Through the assessment, important factors are confirmed and resulting risks quantified and thus the management and policy determination for remediation of the contaminated site can be suggested. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/40905 |
全文授權: | 有償授權 |
顯示於系所單位: | 環境工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-97-1.pdf 目前未授權公開取用 | 1.45 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。