To investigate the influence of radiolysis on kinetics and factors of dimethyl phthalate(DMP),the aqueous DMP solution is degraded by 1.8 MeV E-beam,following pseudo-first-order kinetics.The rate constant of DMP degra...To investigate the influence of radiolysis on kinetics and factors of dimethyl phthalate(DMP),the aqueous DMP solution is degraded by 1.8 MeV E-beam,following pseudo-first-order kinetics.The rate constant of DMP degradation decreased exponentially with increasing initial DMP concentration.The DMP is favorably degraded by radical scavengers under its low concentration and alkaline condition.At high doses,the DMP is attacked by eaq-and ·OH,producing monomethyl phthalate,phthalate acid,and a series of aliphatic carboxylic acids,which are completelymineralized into H2O and CO2.展开更多
In this study,sulfur-doped TiO2 /Ti photoelectrodes were prepared by anodization. The morphology, crystalline structure,composition of sulfur-doped TiO2 /Ti film and light absorption property were examined by SEM,XRD,...In this study,sulfur-doped TiO2 /Ti photoelectrodes were prepared by anodization. The morphology, crystalline structure,composition of sulfur-doped TiO2 /Ti film and light absorption property were examined by SEM,XRD,XRF,XPS and UV/VIS respectively. Dimethyl phthalate( DMP) ,one kind of environmental disrupting chemicals( EDCs) ,was degraded by the optimized photoelectrodes. Power of xenon light,initial concentration of DMP,photoelectrocatalytic( PEC) area of photoelectrode and bias were investigated in the study on kinetics of PEC degradation of DMP. Hence,this study concluded that the optimum conditions were power of xenon light 150 W,initial concentration of DMP 1 mg/L,PEC area of sulfur-doped TiO2 /Ti photoelectrode 10 cm2,bias 1. 3 V in the PEC reaction system.展开更多
利用自制的TiO2/锂硅粉催化剂与H2O2联用进行光催化降解邻苯二甲酸二甲酯(DMP)废水研究。实验结果表明,TiO2/锂硅粉与H2O2联用是降解DMP的有效方法,当TiO2/锂硅粉投加量为1.2 g/L、H2O2体积分数为2.0 m L/L、初始pH=8.0时,反应10 h的DM...利用自制的TiO2/锂硅粉催化剂与H2O2联用进行光催化降解邻苯二甲酸二甲酯(DMP)废水研究。实验结果表明,TiO2/锂硅粉与H2O2联用是降解DMP的有效方法,当TiO2/锂硅粉投加量为1.2 g/L、H2O2体积分数为2.0 m L/L、初始pH=8.0时,反应10 h的DMP降解率最大,为89.18%。通过LC/MS分析反应过程中DMP的降解产物,主要包括侧链缩合成环生成的水杨酸、羟基化产物邻苯二酚和苯环开环生成的2-羟基异丁酸。初步推测TiO2/锂硅粉-H2O2体系下DMP的碳链断裂从侧链开始。展开更多
基金Supported by National Natural Science Foundation of China (No. 40830744 and 40973073)National Key Technology R&D Program in the 11th Five-year Plan of China (No.2008BAC32B03)+2 种基金Shanghai Leading Academic Discipline Project (No.S30109)Science and Technology Commission of Shanghai Municipality (No. 09ZR1411300A.10-0111-07-003)
文摘To investigate the influence of radiolysis on kinetics and factors of dimethyl phthalate(DMP),the aqueous DMP solution is degraded by 1.8 MeV E-beam,following pseudo-first-order kinetics.The rate constant of DMP degradation decreased exponentially with increasing initial DMP concentration.The DMP is favorably degraded by radical scavengers under its low concentration and alkaline condition.At high doses,the DMP is attacked by eaq-and ·OH,producing monomethyl phthalate,phthalate acid,and a series of aliphatic carboxylic acids,which are completelymineralized into H2O and CO2.
基金Sponsored by the National Natural Science Foundation of China ( Grant No 50678044)
文摘In this study,sulfur-doped TiO2 /Ti photoelectrodes were prepared by anodization. The morphology, crystalline structure,composition of sulfur-doped TiO2 /Ti film and light absorption property were examined by SEM,XRD,XRF,XPS and UV/VIS respectively. Dimethyl phthalate( DMP) ,one kind of environmental disrupting chemicals( EDCs) ,was degraded by the optimized photoelectrodes. Power of xenon light,initial concentration of DMP,photoelectrocatalytic( PEC) area of photoelectrode and bias were investigated in the study on kinetics of PEC degradation of DMP. Hence,this study concluded that the optimum conditions were power of xenon light 150 W,initial concentration of DMP 1 mg/L,PEC area of sulfur-doped TiO2 /Ti photoelectrode 10 cm2,bias 1. 3 V in the PEC reaction system.
文摘利用自制的TiO2/锂硅粉催化剂与H2O2联用进行光催化降解邻苯二甲酸二甲酯(DMP)废水研究。实验结果表明,TiO2/锂硅粉与H2O2联用是降解DMP的有效方法,当TiO2/锂硅粉投加量为1.2 g/L、H2O2体积分数为2.0 m L/L、初始pH=8.0时,反应10 h的DMP降解率最大,为89.18%。通过LC/MS分析反应过程中DMP的降解产物,主要包括侧链缩合成环生成的水杨酸、羟基化产物邻苯二酚和苯环开环生成的2-羟基异丁酸。初步推测TiO2/锂硅粉-H2O2体系下DMP的碳链断裂从侧链开始。
