Abstract: With pyrite as adsorbent and CN- as adsorbate，the impact of adsorption time，solution pH value，dosage of pyrite on adsorption effect are investigated. Meanwhile，the infrared spectroscopy detection method is adopted to analyze the difference before or after CN- absorption on pyrite surface，and adsorption results are fitted with Langmuir adsorption model. The results show that pyrite quickly adsorbs sodium cyanide and reach balance after 1 min with the maximum adsorption load up to 3.81 mg/g. pH has little influence on adsorption of cyanide ion by pyrite; Cyanide ion have a strong bonding adsorption action with pyrite. Adsorption of Pyrite particles to cyanide ion is a monomolecular chemical adsorption process.

Key words: Pyrite, Cyanide ion, Adsorption