...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of hazardous materials >Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater
【24h】

Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater

机译：Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

The feasibility of simultaneous recovery of heavy metals from wastewater (e.g., acid mining and electroplating) and production of electricity is demonstrated in a novel photoelectrochemical cell (PEC). The photoanode of the cell bears a nanoparticulate titania (TiO2) film capped with the block copolymer poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol) hole scavenger, which consumed photogenerated holes, while the photogenerated electrons transferred to a copper cathode reducing dissolved metal ions and produced electricity. Dissolved silver Ag+, copper Cu2+, hexavalent chromium as dichromate Cr-2 O-7(2-) and lead Pb2+ ions in a mixture (0.2 mM each) were removed at different rates, according to their reduction potentials. Reduced Ag+, Cu2+ and Pb2+ ions produced metal deposits on the cathode electrode which were mechanically recovered, while Cr2O72- reduced to the less toxic Cr3+ in solution. The cell produced a current density J(sc) of 0.23 mA/cm(2), an open circuit voltage V-oc of 0.63 V and a maximum power density of 0.084 mW/cm(2). A satisfactory performance of this PEC for the treatment of lead-acid battery wastewater was observed. The cathodic reduction of heavy metals was limited by the rate of electron-hole generation at the photoanode. The PEC performance decreased by 30 after 9 consecutive runs, caused by the photoanode progressive degradation. (C) 2016 Elsevier B.V. All rights reserved.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号