摘要
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p H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℃,p H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 p H. The samples before and after reaction were characterized by means of TOC, FTIR and UV-visible spectroscopy. The results 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 ℃, p H of 6,n（Benzidine）：n（S_2O_8^（2-））=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.
出处
《水处理技术》
CAS
CSCD
北大核心
2016年第3期65-68,75,共5页
Technology of Water Treatment
基金
安徽省高等学校省级自然科学研究重点项目(KJ2014A069)
安徽省博士后基金(DG125)
安徽理工大学青年教师科学研究基金自然类重点项目(QN201306)
安徽理工大学博士基金资助项目(2012YB002)
