廢光碟回收廠清洗液中銀、鋁金屬去除之研究

Removal of Silver and Aluminum from the Washing Liquid at a Scrap Compact Disk Recycling Plant

李清華(Ching-Hwa Lee) ； 吳彥翬(Yen-Hui Wu) ； 郭碧芳(Bi-Fang Guo) ； 柯秀靜(Hsiu-Ching Ko) ； 樊國恕(Kuo-Shuh Fan) ； 莊連豪(Lien-Hao Chuang) ； 潘思溫(Szu-Wen Pan)

《科學與工程技術期刊》 5卷4期 (2009/12) Pp. 77-83

https://doi.org/10.7117/JSET.200912.0077

摘要

本研究主要是針對國內某廢光碟回收處理廠於回收廢光碟片所產生之清洗廢液，來進行廢液中銀、鋁金屬之回收去除工作，本研究所採取之方法包括廢液中銀、鋁金屬之電解回收去除及氯化鈉、氯化鈣、硫化鈉、鹽酸之沉澱回收去除。根據本研究之結果顯示，該廢光碟回收處理廠之清洗廢液所含銀、鋁金屬含量不高，其銀含量僅3ppm而鋁含量則爲6ppm左右，因此不具回收價值，另本研究結果顯示當以電解法及氯化鈉、氯化鈣、硫化鈉等沉澱法並無法有效去除廢液中之銀、鋁金屬，而當使用鹽酸來調整該廠清洗廢液之pH至7時，則有效達成99.77%之銀及89.41%之鋁之沉澱去除率。

關鍵字

光碟 ； 回收 ； 再生

並列摘要

The main purpose of this study was to recover the silver and aluminum metals contained in the washing liquid generated at a scrap compact disk recycling plant. Thus, various methods of electric winning, as well as precipitation by NaCl, CaCl, NaS, and HCl, were adopted to recover these two metals from the collected washing liquid. The results revealed that the liquid had concentrations of 3 ppm of silver and 6 ppm of aluminum; therefore, due to such low concentrations, recovery of either of these metals would not be economical. It was also demonstrated that neither the electric winning methods nor precipitation by NaCl, CaCl and NaS can effectively remove the silver and aluminum from the washing liquid. However, the 99.77% silver and 89.41% aluminum contained therein could be removed by using the HCl to adjust the pH to 7.

並列關鍵字

compact disk ； recovery ； recycling