Journal of Ecology and Rural Environment ›› 2019, Vol. 35 ›› Issue (12): 1626-1632.doi: 10.19741/j.issn.1673-4831.2019.0554

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Optimization of Preparation Conditions for Biochar-Loaded Nano-Zero-Valent Iron With Chlorinated Hydrocarbons

WANG Xiang1,2,3, DENG Shao-po2, LI Chuan1,3, WAN Jin-zhong2   

  1. 1. College of Biology and the Environment/Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China;
    2. Nanjing Institute of Environmental Sciences/State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Ministry of Ecology and Environment, Nanjing 210042, China;
    3. National Positioning Observation Station of Hongze Lake Wetland Ecosystem in Jiangsu Province, Hongze 223100, China
  • Received:2019-07-22 Published:2019-12-21

Abstract: The peanut shell biochar-loaded nano-zero-valent iron material (nZVI/BC) was prepared by liquid phase reduction method. The structural properties of the material were obtained by elemental analysis, specific surface area and scanning electron microscopy. The effect of nZVI/BC materials on the removal of pollutants in simulated groundwater prepared by mixing three common chlorinated organic pollutants (chloroform, chlorobenzene, trichloroethylene) was studied. The results show that the BC yield of 300℃ pyrolysis is up to 44.07%, and the structure is relatively intact. The nZVI has a uniform load on the surface of the peanut shell BC, and there is no large agglomeration, showing a chain structure. When the dosage is the same, the composite with carbon to iron ratio of 2:1 has better effect on the overall removal of mixed pollutants. The removal rate of chloroform is 66.59%, trichloroethylene is 72.40%, and chlorobenzene is 74.85%.

Key words: biochar, biochar-nano zero-valent iron composite, chlorinated pollutant, groundwater

CLC Number: