- 學位論文
回收錐管玻璃與螢光粉高值化技術之研究
The study and high value utilization of recycled funnel glass and phosphors of fluorescent lamp
摘要
本論文研究方向分為三部分，第一部分針對材料合成的觀念。本研究利用與錐管玻璃同質性高的奈米二氧化矽以類似自體包覆的方式進行實驗，透過表面觀測及TCLP毒性溶出試驗探討其內部鉛成份溶出之風險。最後所得到毒性特性溶出程序之溶出結果為0.72 mg/L，達到行政院環保署所訂定溶出標準鉛含量5 mg/L以下的目標。由實驗可證明經由奈米二氧化矽之處理技術，可使廢錐管玻璃中的氧化鉛等有害物質達到穩定化且不易溶出之目的。 第二部分則著重介紹以濕法冶金的方式對回收三波長螢光粉中的釔和銪進行提取，經由不同的酸（硫酸及鹽酸）在不同的浸出試驗中將金屬浸出。在一次萃取中，釔成分的酸萃率最高可達79.31%，而銪成分的酸萃率最高可達79.64%。而在二次萃取中，釔成分的平均萃取率約2.05%，而銪成分的平均萃取率約3.41%。本實驗證實硫酸對於釔的萃取效果較好，而鹽酸對銪的萃取效果則較佳。 第三部分主要是針對三波長螢光粉中的稀土萃取物應用於玻璃肥料進行研究。本實驗以燒結法及浸漬法製備稀土玻璃肥料，但目前只對其性質進行探討，後續將進行田野試驗測試玻璃肥料對於植物生長的實際作用。
並列摘要
This thesis was divided into three parts. The first part of this thesis focused on the preparation of high-valued materials from recycled funnel glass for flooring application. A high homogeneity nano silica prepared by sol-gel process were used as a coating material to prevent the lead leaching from the funnel glass. Through the morphology observation and toxicity characteristic leaching procedure (TCLP), the lead leaching from its internal composition was analyzed. The obtained dissolution result was 0.72 mg/L with the dissolution lead content of 5 mg/L or less which meets the EPA standards set. The results proved that the coating of silica nano particles successfully prevent the leaching of harmful substances such as lead oxide from the funnel glass under the acid solution condition. The second part of this thesis focused on the extraction of yttrium and europium from recycled trichromatic phosphor powders using a hydrometallurgical process. Metals are leached from the phosphor powders using different acids (sulfuric acid and hydrochloric acid) treatments. In the first extraction, the maximum efficiency of 79.31% of yttrium and 79.64% of europium was obtained. In the secondary extraction, the average obtained leaching efficiency was about 2.05% of yttrium and 3.41% of europium. It was concluded that the sulfuric acid extraction and hydrochloric acid extraction are both efficient leaching reagents for recovery of yttrium and europium metal. The third part study about rare earth extracts of trichromatic phosphor powders. In this study that use sintering method and dip-coating method to produce rare earth glass fertilizer, but only explore property currently, and follow-up explore by field trial to test the practical effect of plant growth.