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以对氯苯胺（ PCA）为目标污染物，研究了常温下FeS矿活化H2 O2非均相类Fenton体系对难降解有机物的去除效果。分析了初始pH值、催化剂和H2 O2投加量等重要因素对PCA降解率的影响。当PCA浓度为0．2×10－3 mol／L，溶液初始pH值为3．0，H2 O2投加量为3．2×10－3 mol ／L，FeS矿用量为0．4 g／L，反应20 min时，PCA去除率可达100％，且反应进行到40 min后，已达到完全脱氯效果。在此基础上，通过对Cl －、SO42－、Fe3＋等中间产物离子和总有机碳（ TOC）变化规律的测定，探讨了有机物降解机理。研究结果表明：FeS矿对催化H2 O2氧化具有很强的催化活性，能提高H2 O2的利用效率，相比于单一含铁矿物具有更好的催化性能，并且催化剂易于沉淀分离，回收利用。“,”The paper studied the removal effect of organism by use of Fenton -like system of FeS ore par-ticles H2 O2 as hetrogeneous catalysts for the degradation of p -chloroaniline ( PCA) through batch exper-iments.It also examined the effects of initial pH , activator and H2 O2 dosages on PCA degradation .The results showed that under the conditions of initial PCA concentration of 0.2 ×10 -3 mol/L, initial pH of 3.0, FeS ore particles dosage of 0.4 g/L, H2 O2 concentration of 3.2 ×10 -3 mol/L, PCA degradation in aqueous solution reached 100%within 20 min.Moreover, Cl -, SO4 2-and Fe3+ions as the main inor-ganic products together with TOC in aqueous solution were determined to investigate the oxidative mecha-nism.The results indicated that unlike traditional Fenton reagent , the reaction of FeS ore particles with H2 O2 can effectively catalyze the oxidation of organic contaminants .Furthermore catalyst can be easily re-covered from wastewater and reused .