科研之友
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摘要
Wastewater reuse is currently considered globally to be the most critical element of sustainable water management, and refractory pollutants, especially chlorinated organics, make this task more challenging. In this paper, a catalytic membrane reactor is proposed and evaluated to convert two types of organic pollutants simultaneously: chlorinated organics and degradable organics. The spontaneous dechlorination could take place with the oxidation of the degradable organic pollutants at room temperature and atmospheric pressure without any additional carbon source of fuel and oxidant. The reactor could also harvest electricity through the pollutant removal process with a current density several orders higher than a microbial fuel cell. In the present studies, HCOOH was chosen as the typical degradable organic, and the chlorinated preservative 2,4,6-trichlorophenol (2,4,6-TCP) was selected as a model chlorinated pollutant. The operating parameters for the catalytic membrane reactor were investigated experimentally. The optimal operating conditions of the process are as follows: 0.5 mol/L HCOOH, 50 mg/L 2,4,6-TCP, and a flowrate of 36 mL/min. Under these optimal conditions, the voltage reaches a stable value of approximately 630 mV within 2 h, and the current is approximately 4.0 mA. Meanwhile, the power density reaches 880 mW/cm(2) at 300 my. It was also determined that 96.9% of the 2,4,6-TCP was degraded, and 43.8% was completely mineralized. These results indicate that the proposed catalytic membrane reactor provides a novel method of energy reclamation and has a promising application for the removal of a variety of organic pollutants.
- 出版日期2016-2-1
- 单位华东理工大学
