2019-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/673121摘要：近年來因高科技產業蓬勃發展，產生含有鎵和銦及鉈等新興汙染元素(Emerging Contaminant Elements, ECEs)的廢水，當使用遭這些ECEs汙染之灌溉水灌溉農田時，可能會影響水稻產量，或使人們經由攝食高ECEs累積量的稻米，進而造成健康上的風險。水稻產量和稻米中ECEs累積量決定於這些元素在土壤中之生物有效性。而現今國內外鮮少有ECEs在土壤中生物有效性之評估研究，無法得知其對水稻生長和稻米品質安全之衝擊。因高科技產業鎵和銦及鉈等ECEs汙染環境是台灣獨有之問題，唯有我們國內自行研究才能瞭解此問題之嚴重性。本計畫擬評估不同土壤pH值和氧化還原狀態對於ECEs於土壤中的型態及生物有效性之影響，以了解ECEs對台灣各種不同水田土壤栽培水稻之衝擊。ECEs在土壤中之生物有效性為決定這些元素在土壤-水稻根系間的傳輸，水稻植體內傳輸並累積於穀粒以及對土壤微生物相影響之主要因子，是評估ECEs之生物毒性與健康風險之首要工作。本計畫將選用各種不同的臺灣代表性土壤，添加不同濃度之鎵和銦及鉈，藉由孵育(incubation)和盆栽試驗，分析土壤溶液以及水稻植體(含穀粒)中ECEs濃度，評估鎵和銦及鉈在各種不同土壤中的型態及有效性之差異。本計畫所得之結果將會是探討這些ECEs在土壤中生物有效性之先驅性(pioneer)成果，可引領國內外研究ECEs生物毒性與健康風險領域之發展，也可以作為國內外制訂ECEs排放水、灌溉水和土壤管制標準之參考依據。<br> Abstract: Emerging contaminant Elements (ECEs), such as gallium (Ga), indium (In), and thallium (Tl), are trace elements extensively used in semiconductor manufacturing and electro-optical industry. With the vigorous development of high-tech industry in Taiwan, a great amount of wastewater derived from the manufacturing process may be a potential contamination source. Once the industrial effluent was discharged into rivers or even through the irrigation system, it may influence the growth and productivity of crops. Furthermore, human beings may also expose to Ga, In, and Tl via food-chain. The bioavailability of these ECEs in paddy soils and their effects on the growth of rice in soils still remain unclear. A wider knowledge is needed to further assess the potential impact of these ECEs on the soil environment, especially in Taiwan. In this study, the speciation and bioavailability of these ECEs as influenced by soil pH and Eh (redox potential) will be evaluated for assessing their effects on the growth and uptake of Ga, In, and Tl by rice grown in soils with different properties and further for the risk assessment of ECEs ecotoxicology and human health. Various representative soils will be spiked with different levels of Ga, In, and Tl and used for incubation study and pot experiments for investigating the difference of speciation and availability of these ECEs in various soils. The results of this study will be the pioneer information of bioavailability of ECEs in soils, which are useful and important reference for setting up control standards of ECEs in discharge water, irrigation water, and soils.新興污染元素生物有效性鎵銦鉈水田土壤Emerging contaminant elementsbioavailabilityGalliumIndiumThalliumpaddy soils