超声波协同活性碳纤维活化过一硫酸盐降解AO7  

Synergistic activation of peroxymonosulfate by ultrasonic and activated carbon fiber to decolorize acid orange 7

作　　者：王莹[1] 陈家斌[1] 张黎明[1] 吴玮[1] 黄天寅[1] 

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009

出　　处：《环境科学学报》2017年第4期1404-1412,共9页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.51478283);苏州科技大学学术学位研究生科研创新计划项目(No.SKCX15_026)~~

摘　　要：采用超声波(US)和活性碳纤维(ACF)协同活化过一硫酸盐(PMS)产生硫酸根自由基(SO_4^-·)降解偶氮染料酸性橙7(AO7).在US/ACF/PMS体系中,当ACF投加量为0.3 g·L^(-1),n(PMS)/n(AO7)为20/1,US功率密度为10 W·cm^(-2)时,反应30 min后,AO7完全降解.其中,初始pH对AO7降解有较大的影响,pH为2.0时AO7降解效果最好;Cl^-对US/ACF/PMS体系降解AO7有促进作用,Cl-浓度越高,AO7降解速率越快;且ACF在重复使用4次时,协同US活化PMS对AO7仍具有较好的脱色率.通过总有机碳分析发现,US/ACF/PMS体系对染料AO7具有一定的矿化率.采用紫外可见光谱、气相色谱-质谱(GC/MS)对AO7降解过程进行了分析,表明AO7分子中偶氮键及萘环结构均被破坏,并进一步矿化为CO_2和H_2O.Ultrasonic（ US） and activated carbon fiber（ ACF） were used to synergistically activate peroxymonosulfate（ PMS） to decolorize the azo dye,Acid orange 7（ AO7）. The results indicate that the removal rate of AO7 could reach 100% after 30 min with 0.3 g·L（-1）of ACF dosage,20∶1 of PMS/AO7 molar ratio and 10 W·cm（-2） of US power. The initial pH had a significant effect on the AO7 degradation,and pH 2.0 was most favorable for its degradation.In addition,the degradation of AO7 was accelerated after the addition of Cl-,and the degradation rate increased with the increase of Cl-. When ACF was reused for four times,it still exhibited considerable activation capacity for PMS. Moreover,from the analysis with UV-vis spectra and gas chromatographymass spectrometry（ GC/MS） and TOC measurement,the azo bond and naphthalene ring in AO7 was found being destructed and then mineralized into CO2 and H2O.

关 键 词：活性碳纤维 超声波 过一硫酸盐 酸性橙7 

分 类 号：X703[环境科学与工程—环境工程]