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为了研究热活化过硫酸盐对废水中联苯胺的降解效果,考察了不同的过硫酸盐、过硫酸钠投加量、投加次数、反应时间和pH等条件对联苯胺处理效果的影响,并对降解前后的样品进行了TOC、FT-IR和紫外可见光谱表征.结果表明,不同的过硫酸盐对联苯胺均有很好的降解效果,联苯胺的降解效果与硫酸钠的投加量、投加次数、反应温度和反应时间呈正相关关系,确定了降解底物浓度为0.06 mmol/L时的最佳条件:温度为60℃,pH为6,联苯胺与过硫酸钠的物质的量比为1∶2.1;反应60 min后TOC的去除率高达91.4％,280 nm处的吸光值接近零,说明苯环结构被破坏,生成了小分子的酰胺或醇类,联苯胺的出水浓度低于国家排放标准(GB 21904-2008)规定的苯胺类排放限值1.0 mg/L,达到排放标准.“,”To study the degradation of wastewater benzidine by thermal-activated persulfate,a series of factors influencing on the removal efficiency were studied including persulfate species,dosage of sodium persulfate,dosing frequency,reaction time and pH.The samples before and after reaction were characterized by means ofTOC,FTIR and UV-visible spectroscopy.The resu lts showed that different persulfate species had a positive effect on the degradation of benzidine,the degradation efficiency of benzidine was positively associated with sodium persulfate,dosing frequency,temperature and time.When the substrate concentration was 0.06 mmol/L,the optimal degradation conditions were determined:temperature of 60 ℃,pH of 6,n (Benzidine)∶n(S2O82)=1∶2.1.The TOC removal efficiency was up to 91.4％ while absorbance at 280 nm close to zero after reaction for 1 h,indicating that the benzene ring structure was destroyed and small molecule amides or alcohols were generated.The benzidine effluent concentrations was less than national emission standard (GB 21904-2008),which rules on the emission limits of aniline was 1.0 mg/L,meeting the emission standards.