台灣西南部二仁溪時間別養殖牡蠣吸收重金屬鍵結再生纖維之研究

Abstract

全球工業化興盛與科技業發達，造成沿岸養殖牡蠣污染問題，唯牡蠣的強大過濾能力一直受到研究者的青睞，但吸附重金屬後的汙染牡蠣目前卻無法再利用。另一方面，台灣在機能性紡織品的技術卓越，市售銅、鋅纖維可達到除臭抗菌的效能。本研究自2015年10月至2016年6月採用自製繩籃系統，畜養約10cm的牡蠣於二仁溪5個月，再以感應耦合電漿質譜儀(ICP-MS)檢測樣本中銅、鋅、鉛、鎘、砷五種重金屬含量。結果顯示，放養牡蠣體內重金屬含量以銅：66.3ppm；鋅：298.6ppm為最高；鉛、鎘、砷均低於5.3ppm，並隨著時間延長而有增加趨勢，又牡蠣再生纖維可檢測出銅：3.1ppm、鋅：6.0ppm與鉛：6.6ppm。因此，我們藉由牡蠣清除水中重金屬，再添加於再生纖維當中，可達到除污與重金屬回收再利用，或許可以開創出一種可移除環境污染重金屬的技術與產業。

Global industrialization and industrial development have caused serious pollution in coastal oyster farming. Despite oyster’s impressive filtering ability, oysters polluted by heavy metals remain. On the other hand, Taiwan excels in functional textiles, with antibacterial and deodorizing copper-zinc fiber. This study had farmed 10-cm oysters in Er-Ren with self-made basket for five months from October 2015 to June 2016. We then detect five kinds of heavy metals content in our samples, including copper, zinc, lead, cadmium, and arsenic with ICP-MS. The result shows less lead, cadmium and arsenic content in the oysters, and more copper and zinc content, which increments with time. Sided with the fact that regenerated fiber can detect heavy metals like copper, zinc and lead, we come to the conclusion that regenerated fiber, containing trace elements cleaning oyster extracts, can decontaminate, recycle and reuse metals. Skills or even a whole industry of environmental heavy metals remove are ready to be explored.