GO/PDMS-PU海绵负载Fe3O4活化过硫酸盐去除地下水石油烃的研究
Removal of petroleum hydrocarbons from groundwater by GO/PDMS-PU sponge loaded Fe3O4 activated persulfate
周美春 1沈犇 2刘翠 1彭倩 1赵燕 1赵远2
作者信息
- 1. 江苏中吴环保产业发展有限公司,江苏常州 213164
- 2. 常州大学环境科学与工程学院,江苏常州 213164
- 折叠
摘要
针对石油烃(TPH)在土壤中长时间不易分解造成地下水长久污染问题,研究了新型复合石墨烯海绵(GO/PDMS-PU)负载Fe3O4 活化过硫酸盐体系在不同催化剂质量比、初始pH、过硫酸盐(PS)浓度、TPH浓度以及共存阴离子等条件下降解TPH的规律.结果表明,Fe3O4 与GO/PDMS-PU的质量比为1∶2的复合材料降解效率最佳,为88%.当PS浓度为 2 mmol/L、催化剂质量浓度为0.3 g/L时,在酸性和中性条件下更有利于TPH的去除,去除效率为 85%.GO/PDMS-PU/Fe3O4+PS体系的自由基猝灭实验和EPR测试表明,自由基以·SO4-、·OH为主,存在一定量 1O2.
Abstract
Petroleum hydrocarbons,as a widely used raw material worldwide,are not easily decomposed in soil for a long time and can easily cause long-term pollution of surface water and groundwater.The degradation behavior of petroleum hydrocarbons by a novel composite graphene sponge loaded Fe3O4(GO/PDMS-PU/Fe3O4)activated persulfate system activated persulfate system is explored under different catalyst mass ratio,initial pH,persulfate concentration,petroleum hydrocarbons concentration,and coexisting anions.It is found that the composite material with a Fe3O4 to GO/PDMS-PU mass ratio of 1:2 delivers the optimal degradation efficiency of 88％.The acidic and neutral conditions are more favorable for removal of petroleum hydrocarbons,achieving a removal efficiency of 85％when persulfate dosage is 1 mM and catalyst dosage is 0.3 g·L-1.It is shown by the free radical quenching experiment and EPR test of GO/PDMS-PU/Fe3O4+PS system that·SO4-and·OH are the main free radicals,and there exists a certain amount of 1O2.
关键词
石油烃/聚氨酯海绵/氧化石墨烯/过硫酸盐Key words
petroleum hydrocarbons/polyurethane sponge/graphene oxide/persulfate引用本文复制引用
出版年
2024
NETL
NSTL
万方数据