Chemical Journal of Chinese Universities ›› 2019, Vol. 40 ›› Issue (12): 2598-2605.doi: 10.7503/cjcu20190324

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Biochar with Mn Enriched in Iris and Its Application in Fenton-like System

Huibin NIU1,Yan GU2,Changan ZHANG1,2,Yingping HUANG1,2,Yanfen FANG1,2,*()   

  1. 1. College of Biological and Pharmaceutical Sciences
    2. Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China
  • Received:2019-06-10 Online:2019-12-04 Published:2019-12-04
  • Contact: Yanfen FANG E-mail:chem_ctgu@126.com
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(21677086);the National Natural Science Foundation of China(21972073);the National Natural Science Foundation of China(21577078);the Hubei Province Foreign Science and Technology Cooperation Project, China(2018AHB020);the Natural Science Foundation for Innovation Group of Hubei Province, China(2015CFA021);the Foundation of Materials Analysis and Testing Center of China Three Gorges University.

Abstract:

Mn enriched Brazilian iris(Neomarica gracilis) was converted into biochar and its potential application was studied, which provided a new transformation and application method for manganese enriched plant subsequent treatment. The Mn/biochar materials were obtained by pyrolysis of the Mn-rich Brazilian iris in a N2 atmosphere, and named them as BC-L0, BC-L1, BC-L2, BC-R0, BC-R1 and BC-R2 according to the leaf and root, respectively. SEM/EDS, XRD, XPS, AAS and specific surface area analyzer(SBET) were employed to characterize the morphology, chemical composition of Mn doped on biochar surface. The results showed that the leaf part of the iris was the main enrichment part of Mn, and the maximum Mn enrichment concentration was 13.0 mg/g. Mn2O3 flakes was present on the surface of biochar samples When H2O2 was added, the Fenton-like system could be successfully constructed. At 180 min, the degradation rate of RhB(3×10 -5 mol/L) in BC-L2/H2O2 system reached 50%, indicating that the system can be used to remove organic dyes. Furthermore, the possible catalytic oxidation mechanism of RhB in BC-L2/H2O2 system was proposed. The results of this study showed that by converting Mn-enriched plant into Mn/biochar material under suitable thermal cracking conditions, which helped to construct Fenton-like system and degrade toxic organic pollutants. This study provided the green approaching for treatment of cyclic waste treatment.

Key words: Mn pollution, Fenton-like system, Biochar, Super-enriched plant, Waste treatment by waste

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