Oxidation of printed circuit board wastes in supercritical water

被引：71
作者：
Chien, YC
Wang, HP [1 ]
Lin, KS
Yang, YW
机构：
[1] Natl Cheng Kung Univ, Dept Environm Engn, Tainan 70101, Taiwan
[2] Synchrotron Radiat Res Ctr, Hsinchu, Taiwan
来源：
WATER RESEARCH | 2000年 / 34卷 / 17期
关键词：
supercritical water; printed circuit board; EXAFS;
D O I：
10.1016/S0043-1354(00)00184-6
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A feasibility study for oxidation of printed circuit board wastes with NaOH in supercritical water has been investigated. Experimentally, Sr species in the printed circuit board resin was abstracted by sodium cations and the destruction efficiency of the waste was enhanced in the supercritical water oxidation (SCWO) process. By X-ray diffraction (XRD) spectroscopy, Cu2O, CuO, and Cu(OH)(2) were found in the SWCO solid residue of the printed circuit board wastes. The extended X-ray absorption fine structural (EXAFS) spectra indicated that the bond distance of Cu-O in the residue was 1.87 Angstrom with a coordination number of 2.61. Since the Cu-Br species was not observed by XRD and EXAFS spectroscopies, one may eliminate the possibility that the copper was involved in the abstraction of bromine species from the resin matrix in the SCWO process. (C) 2000 Elsevier Science Ltd. All rights reserved.
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页码：4279 / 4283
页数：5
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