Formation of PCDDs and PCDFs during the combustion of polyvinylidene chloride and other polymers in the presence of HCl |
| |
Authors: | Ohta Minoru Oshima Shozo Osawa Naoki Iwasa Toshio Nakamura Tadashi |
| |
Institution: | Conference on Hygiene of Vinylidene Chloride Products, 1-14-7 Nishi-shimbashi, Minato-ku, Tokyo 105-0003, Japan. vdkyo@oak.ocn.ne.jp |
| |
Abstract: | PVDC and three non-chlorinated polymers (PP, PET, and PA) were incinerated at 700-850 degrees C in a laboratory-scale quartz tubular furnace in the presence of HCl (ca. 500 ppm congruent with 0.8 mg/l), and the gas-phase formation of PCDD/Fs, their putative precursors and their homologue profiles were investigated. The addition of HCl had little or no apparent effect on the level of PCDD/Fs formation during PVDC combustion, and their homologue profiles were quite different from those of the three non-chlorinated polymers. With PVDC, O8CDD and particularly O8CDF were by far most prevalent, apparently as a result of the selective formation of the precursors. With each of the three non-chlorinated polymers, combustion at 800 degrees C or higher in the presence of HCl resulted in PCDD/Fs formation at levels equaling or exceeding those observed with PVDC. In trials made with one of them (PP) under the same conditions but using a large polymer sample (100 mg vs 20 mg in all other trials), the level of PCDD/Fs formation was far higher than with the smaller polymer samples, and thus demonstrated the importance of appropriate combustion conditions for polymer incineration. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|