In order to address the challenges associated with the costly preparation and significant dosage requirements of common particle electrodes,natural Fe-tourmaline is used as particle electrode for the rapid and effective degradation of alizarin red,a typical anthraquinone dye.The effects of applied voltage,initial pH,initial mass concentration of alizarin red,electrolyte type and electrolyte concentration on the degradation rate of alizarin red are investigated.The optimum experimental conditions are obtained as follows:applied voltage is 3.5 V,initial pH=5,NaCl is used as electrolyte with a mass concentration of 4 g·L-1,and initial mass concentration of alizarin red is 20 mg·L-1.Fe-tourmaline remains a high cyclic stability after five cycles.In this system,O2 is transformed into O2·-and 1O2 active substances on the surface of tourmaline,which synergistically degrades alizarin red with h+in the structure of tourmaline.The removal rate of COD can reach 72.78％and TOC mineralization rate can achieve 44.85％.Therefore,this method can be used as a low-cost and green method to treat with dye-containing wastewater.
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