Removal of Nitrate from Groundwater using Zero-valent Iron-modified Biochar

Eun-Yeong Han; Hye-Bin Kim; Jong-Gook Kim; Dong-Hun Shin; Kitae Baek

doi:10.7857/JSGE.2020.25.4.028

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2020 Vol.25, Issue 4 Preview Page Next Page

Removal of Nitrate from Groundwater using Zero-valent Iron-modified Biochar 영가철 개질 바이오차를 이용한 지하수의 질산성 질소 제거

31 December 2020. pp. 28-34

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Abstract

Nitrate released from chemical fertilizer, animal wastes, and synthetic detergents can cause methemoglobinemia to infants, thus the standard in drinking water is set to 10 mg/L as World Health Organization recommended. In this study, zero-valent iron-modified rice straw biochar was used to reduce and remove nitrate in the aqueous phase. The rice straw biochar was prepared by pyrolyzing the biomass at 700^oC for 3 hours, and the biochar was modified using 1 M Fe(III), and the Fe(III) on the biochar was reduced to zero-valent iron using sodium borohydride. The modified biochar removed nitrate effectively, which removed more than 91% of nitrate. For the synthetic groundwater, the nitrate removal was lowered to 82% due to the presence of other anions.

Keywords

Nitrate

Reduction

Adsorption

Zero-valent Iron

Biochar

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Information

Publisher :The Korean Society of Soil and Groundwater Environment
Publisher(Ko) :한국지하수토양환경학회
Journal Title :Journal of Soil and Groundwater Environment
Journal Title(Ko) :지하수토양환경
Volume : 25
No :4
Pages :28-34
Received Date : 2020-10-15
Revised Date : 2020-10-20
Accepted Date : 2020-11-10
DOI :https://doi.org/10.7857/JSGE.2020.25.4.028

Journal of Soil and Groundwater Environment ISSN:1598-6438(Print) 2287-8831(Online) 지하수토양환경

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