廢面板玻璃改質玻璃奈米孔洞材料吸附選擇性提升之研究與其應用
| 中文摘要 | 液晶顯示器已取代過去傳統陰極射線管顯示裝置，且生產量及使用量日益增多，導致廢棄量與日俱增，因此，處理廢液晶面板玻璃已是各國關注議題，以現行處理模式委託廢棄物處理廠進行掩埋處置，將造成土地環境負面衝擊。 然而，廢液晶面板玻璃主要由多種金屬氧化物所構成，其成分與沸石、分子篩等多孔材料相近，可改質為一多功能吸附材料，並應用於處理廢水中重金屬污染物。本工作團隊利用奈米孔洞成型技術，將廢面板玻璃改質為玻璃奈米孔洞材料，其比表面積為174.6 m2/g，平均孔洞大小為9.89 nm，可吸附去除水中鉛、銅、鎘、鎳、鋅、鉻等重金屬離子，為一新型低成本、高效率的重金屬吸附材料。 近年來，發展分離回收水體中低濃度有價物質技術已成為發展趨勢，為提升玻璃奈米孔洞材料的吸附選擇性，本工作團隊將玻璃奈米孔洞材料進行無機改質，改變材料表面結構與特性增加吸附選擇性。利用田口品質工程得知改質條件與吸附選擇性的關係，得到最適化製程條件：反應溫度180°C、反應時間48小時、改質劑量10%、固液比1:6。 改質後銅/鎳吸附選擇性可提升至16.3，銅/鋅吸附選擇性可提升至11.2。改質後比表面積為117m2/g，平均孔徑大小9.7nm。於真實廢水驗證中，選擇性玻璃奈米孔洞材料可處理自身體積600倍之銅、鎳混合廢水與自身體積700倍之銅、鋅混合廢水，將不同種類重金屬離子分離。吸附後的重金屬離子其脫附率約50-60%，以電解回收法回收銅離子得到之銅金屬純度>95%。依照實驗結果進行經濟效益評估，提供處理混合重金屬廢水吸附之服務模式，其投資報酬率約26.8%，具投資潛力。 | ||
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| 中文關鍵字 | 廢液晶面板玻璃、重金屬、吸附選擇性 | ||
基本資訊
| 專案計畫編號 | EPA-108-XA05 | 經費年度 | 108 | 計畫經費 | 3000 千元 |
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| 專案開始日期 | 2019/01/01 | 專案結束日期 | 2019/11/30 | 專案主持人 | 李念祖 |
| 主辦單位 | 回收基管會 | 承辦人 | 劉倩 | 執行單位 | 財團法人工業技術研究院 |
成果下載
| 類型 | 檔名 | 檔案大小 | 說明 |
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| 期末報告 | 廢面板玻璃改質玻璃奈米孔洞材料吸附選擇性提升之研究與其應用-期末報告定稿.pdf | 7MB |
Research of enhancing adsorption selectivity of green glass adsorbent transformed from waste LCD panel glass and its application.
| 英文摘要 | Thin film transistor liquid-crystal display (TFT-LCD) industry has changed the visual communication and colorization of human life. However, the disposal of huge amount of waste glass from LCD panel has become one of the major worldwide environment issues. The utilization of the mentioned waste material in landfilling brought negative environmental impact. Display glass is composed of various metal oxides, and its composition is similar to porous materials such as zeolite and molecular sieve. This characteristic makes it possible to modify disply glass into a multifunctional adsorption material for treating heavy metal wastewater. We used nano-pore forming technology to transform waste panel glass into green glass adsorbent with a specific surface area of 174.6 m2 / g and an average pore size of 9.89 nm. Green glass adsorbent can adsorb and remove lead, copper, cadmium, nickel, zinc and chromium ions in wastewater, and it is a new type of low-cost and high-efficiency adsorption material for removing heavy metal ions. In recent years, the technological development for the separation and recovery of low-concentration valuable substances in water has become a new trend, which not only promoted the reuse of resources, but also gained the autonomy of the valuable metal resources. Since the ion exchange sites had good adsorption selectivity rather than surface asymmetric charge, we tried to adjust surface structure and characteristics of the material by inorganic modification to reduce surface asymmetric charge generation. After modification, the copper/nickel adsorption selectivity increased to 16.3, and the copper/zinc adsorption selectivity increased to 11.2. The specific surface area is 117 m2/g, the average pore size is 9.7 nm. In the real wastewater verification, the selective green glass adsorbent can treat copper-nickel mixed wastewater for 600 times bed volume, also copper-zinc mixed wastewater for 700 times bed volume, separating different kinds of heavy metal ions. The desorption rate of the adsorbate is about 50-60%. Purity of the copper metal recovered from wastewater by electrolytic recovery is >95%. The economic benefit assessment was carried out to provide a service model for the treatment of mixed heavy metal wastewater adsorption according to the experimental results. The return on investment was about 26.8%. | ||
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| 英文關鍵字 | Waste LCD panel glass, heavy metal, adsorption selectivity | ||