Separation of Cerium Oxide Abrasive and Glass Powder in an Abrasive-Glass Polishing Waste by Means of Liquid–Liquid–Powder Extraction Method for Recovery: A Comparison of Using a Cationic and an Anionic Surfactant Collector

Li-Pang Wang, Yan-Jhang Chen, Yun-Chen Tso, Chia-Feng Sheng, Josiane Ponou, Mingyin Kou, Heng Zhou and Wei-Sheng Chen
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Li-Pang Wang: Institute of Environmental Engineering and Management, College of Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Yan-Jhang Chen: Institute of Environmental Engineering and Management, College of Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Yun-Chen Tso: Institute of Environmental Engineering and Management, College of Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Chia-Feng Sheng: Institute of Environmental Engineering and Management, College of Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Josiane Ponou: Department of Systems Innovation, School of Engineering, the University of Tokyo, Tokyo 113-8656, Japan
Mingyin Kou: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Heng Zhou: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Wei-Sheng Chen: Department of Resources Engineering, National Cheng Kung University, Tainan 701, Taiwan

Sustainability, 2020, vol. 12, issue 11, 1-13

Abstract: Applying a cerium oxide abrasive to polish glass components generates a polishing waste containing the cerium oxide abrasive and the glass powder produced during polishing. This research applied the liquid–liquid–powder extraction method to separate the cerium oxide abrasive and the polished glass powder in an abrasive-glass polishing waste for recovering the cerium oxide abrasive. Two liquids of isooctane and water were utilized. The effectiveness of using a cationic and an anionic surfactant collector, i.e., dodecylamine acetate (DAA) and sodium oleate (NaOL), respectively, in improving their extraction and separation was investigated and compared. The results indicated that NaOL addition could improve the mutual separation of cerium oxide abrasive and glass powder but DAA could not, because the former could selectively improve the extraction of cerium oxide abrasive from the water phase to isooctane phase whereas the latter could improve that of both powders. Optimal separation for the cerium oxide abrasive and the polished glass powder in an abrasive-glass polishing waste were achieved by adding NaOL of 7.5 kg/ton at pH 7; the content of cerium oxide abrasive in the solid recovered from the isooctane phase was 96.4% with a recovery of 88.1%.

Keywords: cerium oxide abrasive; glass powder; separation; recovery; liquid–liquid–powder extraction; surfactant collector; dodecylamine acetate (DAA); sodium oleate (NaOL) (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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