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Water 2017, 9(5), 341; doi:10.3390/w9050341

Mechanism of Nitrogen Removal from Aqueous Solutions Using Natural Scoria

1,2,3
,
1,2,3,* , 2,3
,
1,2,3
and
1,2,3
1
College of Environment and Resources, Jilin University, Changchun 130021, China
2
Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
3
Institute of Water Resources and Environment, Jilin University, Changchun 130021, China
*
Author to whom correspondence should be addressed.
Academic Editor: Robert Powell
Received: 8 March 2017 / Revised: 10 April 2017 / Accepted: 10 May 2017 / Published: 11 May 2017
(This article belongs to the Special Issue Groundwater Monitoring and Remediation)
View Full-Text   |   Download PDF [2142 KB, uploaded 11 May 2017]   |  

Abstract

The efficiencies and mechanisms of nitrogen removal from groundwater by scoria were studied. When NH4+-N concentration was 0.5–10 mg/L, the removal was 96–89%. When NO2-N concentration was 0.1–5 mg/L, the removal was 93–85%. When NO3-N concentration was 30–150 mg/L, the removal was 85–70%. Additionally, van der Waals forces had a positive impact on the adsorption, which promoted NH4+-N adsorption. Ion exchange and dissolution did not exist. Functional groups of N-H, C-H, and C-N changed after adsorption. Overall, this study indicates that scoria is an ecologically friendly and safe material that can be utilized for groundwater purification to treat nitrogen-contaminated water. View Full-Text
Keywords: scoria; adsorption; nitrogen; mechanism; characterization scoria; adsorption; nitrogen; mechanism; characterization
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Dong, T.; Zhang, Y.; Su, X.; Chen, Z.; Si, C. Mechanism of Nitrogen Removal from Aqueous Solutions Using Natural Scoria. Water 2017, 9, 341.

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