Bisphenol A was efficiently removed by the polymerization and precipitation method using Coprinus cinereus peroxidase. The removal efficiency was optimal between pH 9-10 and at 40 degreesC with a molar ratio of H2O2 to bisphenol A of about 2. To remove 100 mg bisphenol A l(-1), peroxidase was required 5 U ml(-1) at pH 7 and 25 degreesC and 3 U ml(-1) at pH 10 and 40 degreesC.