標題: | Silica materials recovered from photonic industrial waste powder: Its extraction, modification, characterization and application |
作者: | Lin, Liang-Yi Kuo, Jien-Ting Bai, Hsunling 環境工程研究所 Institute of Environmental Engineering |
關鍵字: | Resource recovery;Phoronic industrial waste powder;Mesoporous silica materials;CO2 adsorbent |
公開日期: | 15-八月-2011 |
摘要: | This study explored the possibility of recovering waste powder from photonic industry into two useful resources, sodium fluoride (NaF) and the silica precursor solution. An alkali fusion process was utilized to effectively separate silicate supernatant and the sediment. The obtained sediment contains purified NaF (>90%), which provides further reuse possibility since NaF is widely applied in chemical industry. The supernatant is a valuable silicate source for synthesizing mesoporous silica material such as MCM-41. The MCM-41 produced from the photonic waste powder (PWP), namely MCM-41(PWP), possessed high specific surface areas (1082 m(2)/g), narrow pore size distributions (2.95 nm) and large pore volumes (0.99 cm(3)/g). The amine-modified MCM-41 (PWP) was further applied as an adsorbent for the capture of CO2 greenhouse gas. Breakthrough experiments demonstrated that the tetraethylenepentamine (TEPA) functionalized MCM-41(PWP) exhibited an adsorption capacity (82 mg CO(2)/g adsorbent) of only slightly less than that of the TEPA/MCM-41 manufactured from pure chemical (97 mg CO(2)/g adsorbent), and its capacity is higher than that of TEPA/ZSM-5 zeolite (43 mg CO(2)/g adsorbent). The results revealed both the high potential of resource recovery from the photonic solid waste and the cost-effective application of waste-derived mesoporous adsorbent for environmental protection. (C) 2011 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.jhazmat.2011.05.011 http://hdl.handle.net/11536/20256 |
ISSN: | 0304-3894 |
DOI: | 10.1016/j.jhazmat.2011.05.011 |
期刊: | JOURNAL OF HAZARDOUS MATERIALS |
Volume: | 192 |
Issue: | 1 |
起始頁: | 255 |
結束頁: | 262 |
顯示於類別: | 期刊論文 |