Enhanced Cd(II) removal with simultaneous hydrogen production in biocathode microbial electrolysis cells in the presence of acetate or NaHCO 3
| Autor: | Yiran Chen, Jingya Shen, Yuzhen Pan, Xie Quan, Liping Huang |
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| Rok vydání: | 2016 |
| Předmět: |
Electrolysis
Renewable Energy Sustainability and the Environment Chemistry Inorganic chemistry Biofilm Energy Engineering and Power Technology 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Acclimatization law.invention Metal Fuel Technology law visual_art Carbon source Microbial electrolysis cell visual_art.visual_art_medium 0210 nano-technology 0105 earth and related environmental sciences Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 41:13368-13379 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.06.200 |
| Popis: | Enhanced Cd(II) removal with simultaneous hydrogen production was achieved in biocathode microbial electrolysis cells (MECs) using carbon source of acetate or NaHCO3 at long-term bacterial community acclimation and elevated Cd(II) concentrations. Removal of Cd(II) reached 7.33 ± 0.37 mg/L/h (acetate) and 6.56 ± 0.38 mg/L/h (NaHCO3) whereas hydrogen production was 0.301 ± 0.005 m3/m3/d (acetate) and 0.127 ± 0.024 m3/m3/d (NaHCO3) at an initial Cd(II) of 50 mg/L. Similar Cd(II) and metallic Cd were present in the precipitates of either acetate or NaHCO3 biocathodes whereas same predominant species but in different proportions were found in the acetate or NaHCO3 biofilms. These findings demonstrate the importance of both long-term bacterial community acclimation at elevated Cd(II) concentrations and carbon source for enhanced Cd(II) removal with simultaneous hydrogen production in the biocathode MECs. |
| Databáze: | OpenAIRE |
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