Removal of chloride ions using a bismuth electrode in capacitive deionization (CDI)
| العنوان: | Removal of chloride ions using a bismuth electrode in capacitive deionization (CDI) |
|---|---|
| المؤلفون: | Hongbin Cao, Feng Duan, Yuping Li, Chunlei Su, Junjun Chang |
| المصدر: | Environmental Science: Water Research & Technology. 6:373-382 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Environmental Engineering, Materials science, Capacitive deionization, Inorganic chemistry, chemistry.chemical_element, 02 engineering and technology, Carbon black, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Chloride, Cathode, 0104 chemical sciences, Bismuth, law.invention, Anode, chemistry.chemical_compound, chemistry, law, Electrode, medicine, Bismuth oxychloride, 0210 nano-technology, Water Science and Technology, medicine.drug |
| الوصف: | Non-carbon materials in capacitive deionization (CDI) can help to enhance the capacity of removed ions. Here, we report for the first time the removal of chloride ions (Cl−) with a bismuth (Bi) anode when coupled with an activated carbon (AC) cathode in CDI. The effects of carbon black in the Bi electrode, applied voltage, electrode mass loading and initial concentration on Cl− removal are investigated. Moreover, its cycle performance is also tested. Results show that addition of carbon black to a Bi electrode (Bi@CB) significantly improves Cl− removal. The declining trend of Cl− concentration and appearance of peaks assigned to products of bismuth oxychloride (BiOCl) in XRD patterns confirm Cl− storage by the Bi electrode, which is enhanced with an increase in voltage. When coupled with AC in a fixed mass, increasing the Bi mass does not contribute to more Cl− removal. Although the cycle performance is not excellent (the attenuation rate is 74% after 10 cycles), its chloride removal capacity is ∼2–3 times the value of AC (e.g. 0.95 vs. 0.32 mmol gBi−1 at 1.2 V in 500 mg L−1 NaCl solution). Besides, the Bi–AC electrode pair in CDI is more suitable to remove Cl− from a solution with a Cl− concentration of below 600 mg L−1. |
| تدمد: | 2053-1419 2053-1400 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::031b02864f2b129d1477f1860645c7db https://doi.org/10.1039/c9ew00985j |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........031b02864f2b129d1477f1860645c7db |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20531419 20531400 |
|---|