• 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*

  • Department of Environmental & Energy and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 57896, Republic of Korea

  • 영가철 개질 바이오차를 이용한 지하수의 질산성 질소 제거

  • 한은영·김혜빈·김종국·신동훈·백기태*

  • 전북대학교 환경에너지융합학과 및 토양환경연구센터

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 700oC 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

This Article

  • 2020; 25(4): 28-34

    Published on Dec 31, 2020

  • 10.7857/JSGE.2020.25.4.028
  • Received on Oct 15, 2020
  • Revised on Oct 20, 2020
  • Accepted on Nov 10, 2020

Correspondence to

  • Shin·Kitae Baek

  • Department of Environmental & Energy and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 57896, Republic of Korea

  • E-mail: kbaek@jbnu.ac.kr