| Autor: |
Su-Mei, Li, Qi, Zhu, Ping, Liu, Yi, Shang, Ya-Jing, Tian, Wei, Yao, Wei-Yao, Zhu |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
Huan jing ke xue= Huanjing kexue. 30(7) |
| ISSN: |
0250-3301 |
| Popis: |
A typical p-DCB production process was selected in this study. A series of p-DCB product samples, 1 Japanese sample and 1 chlorobenzene sample were collected and analyzed for by-product polychlorinated biphenyls (PCBs). It is a common phenomenon that byproduct PCBs exists in the p-DCB production process. The PCBs levels in the p-DCB samples were 62-781 ng/g and the highest WHO-TEQ in the process was 0.24 ng/g, while the PCBs level in the Japanese sample reached 881 ng/g. PCB31 was the dominate PCB congener in all the p-DCB samples with the maximum 98.5% of the total PCBs. Maximum content of PCBs was TrCBs in the p-DCB samples with the next TeCBs, DiCBs and PeCBs, while MoCBs were the highest in the chlorobenzene sample. Furthermore, a formation mechanism of PCBs in the production process was proposed and proved by the analysis result. It suggested that the formation of PCBs form the condensation of polychlorobenzenes had a relation with the concentration of polychlorobenzenes and the chlorine position in the benzene ring. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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