NDLI: Assessment of a Natural Iron-Based Sand for the Removal of Nitrate from Water

Content Provider	Springer Nature Link
Author	Zorgani, E. Abdulmutaleb Cibati, Alessio Trois, Cristina
Copyright Year	2016
Abstract	This research investigated the efficiency of South African sands and a type of zero-valent iron (ZVI) to remove nitrate from contaminated water. Batch experiments were carried out using soils widely available in the region of Kwazulu-Natal in South Africa (Berea red Sand (BRS) and Umgeni Sand (US), a type of ZVI and two mixes of BRS-ZVI (75–25 and 50–50 % w/w). The experiments were conducted in semi-anoxic conditions to investigate the nitrate removal potentials of the substrates. Batch tests revealed 100 % of nitrate removal by ZVI at lower concentrations (10–25 mg/L), while at higher concentrations (up to 100 mg/L), the removal efficiency decreased. The BRS, as sole material, showed the highest removal (70 %) at 25-mg/L nitrate solution, while at higher concentrations (50 and 100 mg/L), the nitrate removal was 36.7 and 42.9 %, respectively. The ZVI-BRS 50 % mix showed the best performance in terms of both rates and percentage of removal for most of the nitrate concentrations investigated indicating that a higher amount of BRS in the mixes improves the adsorption capacity. Both Langmuir and Freundlich isotherm models were applied to experimental data, and Langmuir described better the nitrate removal process. According with our findings, the BRS could represent a viable alternative to the ZVI to reduce the cost of the treatment and to increase the nitrate removal capacity.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	227
Issue Number	7
e-ISSN	15732932
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-06-30
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hematite Zero-valent iron Nitrate removal Contaminated groundwater Cost-effective material Environment Water Quality/Water Pollution Atmospheric Protection/Air Quality Control/Air Pollution Soil Science & Conservation Hydrogeology Climate Change/Climate Change Impacts
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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