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以金電沉積活性碳纖維布結合電熱再生系統吸附與回收汞蒸氣  環工所教授分享研究發現

 

        由於汞具高危害性,近年來各國法規對於含汞產品的使用皆提高處理限制,大量含汞產品如液晶顯示器中的螢光燈管進入回收體系,造成每年有大量的廢棄含汞螢光燈管需破碎回收。同時市面上仍存在無法取代金屬汞添加之產品,因此如何有效去除並處理回收破碎過程中逸散的汞蒸氣也成為新課題。

        台大農化系日前特邀台大環工所教授席行正進行專題演講,以「使用金電沉積活性碳纖維布結合電熱再生系統吸附與回收汞蒸氣」為題,分享最新研究。

        席行正研究發現,以活性碳纖維布作為起始原料,利用電沉積的方式,於不同電沉積時間下,製備具有不同金含量之活性碳纖維布,活性碳纖維布的孔洞與氧官能基能夠以物理及化學形式吸附汞,汞以金汞齊的形式吸附於金電沉積活性碳纖維布上;後續利用電熱再生脫附,再生後吸附效率皆能穩定維持在90%以上,顯示能夠有效解決汞蒸氣逸散的問題。

 

台大環工所教授席行正(左)。

 

會後學生與講者針對此研究與相關環境議題進行熱烈討論。

 

 

Gold-electrodeposited activated carbon fiber cloth

        The Department of Agricultural Chemistry invited Professor Xing-Cheng Xi, of Graduate Institute of Environmental Engineering, NTU for a speech entitled “The use of gold-electrodeposited activated carbon fiber cloth combined with electric heating regeneration system to absorb and recover mercury vapor”. Due to the high harmfulness of mercury, many countries have increased their restrictions for the use of mercury-containing products. Therefore, it is necessary to effectively remove and dispose of the mercury vapor that escapes during the recycling process.

        Activated carbon fiber cloth is used as the starting material to prepare activated carbon fiber cloth with different gold content under different electrodeposition times. The holes and oxygen functional groups of the activated carbon fiber cloth can adsorb mercury in physical and chemical forms. Mercury is adsorbed onto the gold electrodeposited activated carbon fiber cloth in the form of gold amalgam; subsequent electrothermal regeneration is used for desorption, and the adsorption efficiency after regeneration can be stably maintained at more than 90%.

        Students and speaker had an enthusiastic discussion regarding this research and the related environmental issues after the meeting, and the group photo is as shown below.

 

 

Seminar of Dr. Xing-Cheng Xi (left) : “The use of gold-electrodeposited activated carbon fiber cloth combined with electric heating regeneration system to absorb and recover mercury vapor”

 

 

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