Zhang, Q. and Arribas, P. and Remillard, E.M. and García-Payo, M.C. and Khayet, M. and Vecitis, C.D. (2017) Interlaced CNT Electrodes for Bacterial Fouling Reduction of Microfiltration Membranes. Environmental Science & Technology, 51 (16). pp. 9176-9183. ISSN 0013-936X
Full text not available from this repository.Abstract
nterlaced carbon nanotube electrodes (ICE) were prepared by vacuum filtering a well-dispersed carbon nanotube-Nafion solution through a laser-cut acrylic stencil onto a commercial polyvinylidene fluoride (PVDF) micro filtration (MF) membrane. Dead-end filtration was carried out using 10(7) and 10(8) CFU mL(-1) Pseudomonas fluorescens to study the effects of the electrochemically active ICE on bacterial density and morphology, as well as to evaluate the bacterial fouling trend and backwash (BW) efficacy, respectively. Finally, a simplified COMSOL model of the ICE electric field was used to help elucidate the antifouling mechanism in solution. At 2 V DC and AC (total cell potential), the average bacterial log removal of the ICE-PVDF increased by similar to 1 log compared to the control PVDF (3.5-4 log). Bacterial surface density was affected by the presence and polarity of DC electric potential, being 87-90% lower on the ICE cathode and 59-93% lower on the ICE anode than that on the PVDF after filtration, and BW further reduced the density on the cathode significantly. The optimal operating conditions (2 V AC) reduced the fouling rate by 75% versus the control and achieved up to 96% fouling resistance recovery (FRR) during BW at 8 V AC using 155 mM NaCl. The antifouling performance should mainly be due to electrokinetic effects, and the electric field simulation by COMSOL model suggested electrophoresis and dielectrophoresis as likely mechanisms
| Item Type: | Article |
|---|---|
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering T Technology > TP Chemical technology |
| Depositing User: | José Ángel Gómez Martín |
| Date Deposited: | 07 Sep 2017 07:13 |
| Last Modified: | 07 Sep 2017 07:13 |
| URI: | http://eprints.imdea-agua.org:13000/id/eprint/796 |
Actions (login required)
 |
View Item |
