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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (32): 40-46.doi: 10.11924/j.issn.1000-6850.casb2023-0228

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Study on the Adsorption of Heavy Metal Nickel by Biochar Prepared from Three Kinds of Bran

CHEN Hongsen(), HONG Ciqing, MO Wenjing, CAI Xinkai, GUI Fangze, GUAN Xiong, PAN Xiaohong()   

  1. State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/ Key Lab of Biopesticide and Chemical Biology, Ministry of Education/ College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002
  • Received:2023-03-21 Revised:2023-08-21 Online:2023-11-15 Published:2023-11-10

Abstract:

In order to explore the treatment of heavy metal nickel and the excessive waste of bran resources, this study used Pleurotus eryngii mushroom bran, agaricus mushroom bran and shiitake mushroom bran as raw materials to prepare biochar (PEBC, PGBC and LEBC), and scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and surface area measurement (BET) were applied to characterize their structure. Zeta potential was determined to explore the adsorption mechanism, and the adsorption effect of three kinds of bran biochar on nickel was compared by adsorption experiments. The results showed that all three kinds of bran biochar had irregular pores and more mineral crystals attached to the surface. In general, PEBC had the best adsorption effect with a removal rate of more than 99% and the maximum equilibrium adsorption capacity reaching 122.89 mg/g. In this study, waste bran was used to explore the treatment of heavy metal nickel, which proved that it had a broad application prospect in the treatment of heavy metal nickel in water pollution based on the resource utilization of bran.

Key words: bran, biochar, nickel ion, adsorption