Fe 0 and Fe 0 fully covered with Cu 0 (Fe 0 + Fe/Cu) in a fixed bed reactor for nitrate removal

To develop a cost-effective, feasible and robust technology for nitrate removal by chemical degradation, a Fe 0 and Fe 0 fully covered with Cu 0 ( i.e. , Fe 0 + Fe/Cu) fixed reactor was set up in this study. The performance and mechanism of the Fe 0 + Fe/Cu system for nitrate reduction were investig...

Full description

Saved in:
Bibliographic Details
Published in:RSC advances 2016, Vol.6 (110), p.108229-108239
Main Authors: Ren, Yi, Zhou, Jinfan, Lai, Bo, Tang, Wenjing, Zeng, Yan
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To develop a cost-effective, feasible and robust technology for nitrate removal by chemical degradation, a Fe 0 and Fe 0 fully covered with Cu 0 ( i.e. , Fe 0 + Fe/Cu) fixed reactor was set up in this study. The performance and mechanism of the Fe 0 + Fe/Cu system for nitrate reduction were investigated thoroughly. First, the initial pH of the solution and the mass ratio of Fe 0 and Fe/Cu ( i.e. , M(Fe 0 )/M(Fe/Cu) ratio) in the medium materials were optimized, and then two control experiments (Fe 0 + quartz sand system and Fe 0 + Cu 0 system) were set up to confirm the superiority of the Fe 0 + Fe/Cu system. The results suggest that high NO 3 − –N removal (>99.0%), K obs (0.403 min −1 ) and low NH 4 + –N generation rate (61.1%) could be obtained by the developed system (Fe 0 + Fe/Cu) with a short hydraulic retention time (HRT = 16 min). In addition, the operational life of the Fe 0 + Fe/Cu system and Fe 0 + quartz sand system were investigated comparatively, which shows that the operational life of the former was much longer than that of the latter. Finally, characteristics of the medium materials in the Fe 0 + Fe/Cu system and Fe 0 + quartz sand system were also observed by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) before and after long-term operation. Therefore, the developed system in this study is a promising technology for nitrate contaminated water treatment.
ISSN:2046-2069
2046-2069
DOI:10.1039/C6RA24014C