Next Article in Journal
How Willing Are Herders to Participate in Carbon Sequestration and Mitigation? An Inner Mongolian Grassland Case
Previous Article in Journal
Who Beats the Dutch Tax Department? Tracing 20 Years of Niche–Regime Interactions on Collective Solar PV Production in The Netherlands
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Sustainability 2018, 10(8), 2806; https://doi.org/10.3390/su10082806

Construction of a Self-Powered System for Simultaneous In Situ Remediation of Nitrate and Cr(VI) Contaminated Synthetic Groundwater and River Sediment

School of Environment, Tsinghua University, Beijing 10084, China
*
Author to whom correspondence should be addressed.
Received: 15 July 2018 / Revised: 29 July 2018 / Accepted: 1 August 2018 / Published: 8 August 2018
(This article belongs to the Section Sustainable Use of the Environment and Resources)
Full-Text   |   PDF [3280 KB, uploaded 8 August 2018]   |  

Abstract

A novel self-powered system was constructed to in situ remove nitrate and Cr(VI) from synthetic groundwater and achieve river sediment remediation simultaneously. The sediment organic matter in an anodic chamber was used as a carbon source to provide self-powered energy to reduce the cathode’s contaminants. With the acceptance of protons and electrons, nitrate and Cr(VI) were transformed into nitrite and Cr(III), respectively. In a 72 h test with both nitrate and Cr(VI) present, nitrate was removed at a rate of 70.96 mg/m3·h and Cr(VI) at a rate of 8.95 mg/m3·h. When a phosphate buffer was used in the test, their removal rates were changed to 140.83 mg/m3·h and 8.33 mg/m3·h, respectively. The results showed that the self-powered system could achieve the simultaneous reduction of nitrate and Cr(VI), although the presence of Cr(VI) hindered nitrate reduction. This system could realize simultaneous in situ groundwater and sediment remediation, with no need for additional energy or materials. View Full-Text
Keywords: self-powered system; groundwater remediation; denitrification; Cr(VI) removal; cyclic voltammetry (CV) self-powered system; groundwater remediation; denitrification; Cr(VI) removal; cyclic voltammetry (CV)
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Han, L.; Liu, R.; Li, M.; Zhang, N.; Zhang, F.; Liu, X. Construction of a Self-Powered System for Simultaneous In Situ Remediation of Nitrate and Cr(VI) Contaminated Synthetic Groundwater and River Sediment. Sustainability 2018, 10, 2806.

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.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sustainability EISSN 2071-1050 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top