Preparation method and application of cobalt ferrite alkali modified coconut shell biochar

Abstract

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for preparing cobalt ferrite-modified coconut shell biochar and its application. The method includes: activating and pyrolyzing coconut shell powder with KOH to obtain alkaline coconut shell biochar; then loading cobalt ferrite nanoparticles onto the surface of the alkaline coconut shell biochar via a hydrothermal synthesis method; and finally drying to obtain cobalt ferrite-modified coconut shell biochar. This composite material can efficiently activate persulfate to degrade sulfamethoxazole in water and has advantages such as easy magnetic recovery and good cycle stability. The raw materials used in this invention are widely available and inexpensive, and the process is simple, making it significant for the removal of recalcitrant sulfonamide antibiotics.

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