Next Article in Journal
Activated Carbons Derived from Teak Sawdust-Hydrochars for Efficient Removal of Methylene Blue, Copper, and Cadmium from Aqueous Solution
Next Article in Special Issue
Structure and Functions of Hydrocarbon-Degrading Microbial Communities in Bioelectrochemical Systems
Previous Article in Journal
Stable Isotope Reveals Tap Water Source under Different Water Supply Modes in the Eastern Margin of the Qinghai–Tibet Plateau
Previous Article in Special Issue
Progress Towards Bioelectrochemical Remediation of Hexavalent Chromium
Open AccessArticle

Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal

Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2579; https://doi.org/10.3390/w11122579
Received: 31 October 2019 / Revised: 3 December 2019 / Accepted: 4 December 2019 / Published: 6 December 2019
An innovative bioelectrochemical reductive/oxidative sequential process was developed and tested on a laboratory scale to obtain the complete mineralization of perchloroethylene (PCE) in a synthetic medium. The sequential bioelectrochemical process consisted of two separate tubular bioelectrochemical reactors that adopted a novel reactor configuration, avoiding the use of an ion exchange membrane to separate the anodic and cathodic chamber and reducing the cost of the reactor. In the reductive reactor, a dechlorinating mixed inoculum received reducing power to perform the reductive dechlorination of perchloroethylene (PCE) through a cathode chamber, while the less chlorinated daughter products were removed in the oxidative reactor, which supported an aerobic dechlorinating culture through in situ electrochemical oxygen evolution. Preliminary fluid dynamics and electrochemical tests were performed to characterize both the reductive and oxidative reactors, which were electrically independent of each other, with each having its own counterelectrode. The first continuous-flow potentiostatic run with the reductive reactor (polarized at −450 mV vs SHE) resulted in obtaining 100% ± 1% removal efficiency of the influent PCE, while the oxidative reactor (polarized at +1.4 V vs SHE) oxidized the vinyl chloride and ethylene from the reductive reactor, with removal efficiencies of 100% ± 2% and 92% ± 1%, respectively. View Full-Text
Keywords: reductive dechlorination; oxidative dechlorination; bioelectrochemical systems; bioremediation reductive dechlorination; oxidative dechlorination; bioelectrochemical systems; bioremediation
Show Figures

Graphical abstract

MDPI and ACS Style

Zeppilli, M.; Dell’Armi, E.; Cristiani, L.; Petrangeli Papini, M.; Majone, M. Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal. Water 2019, 11, 2579.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop