摘要
为降解偶氮染料废水,采用水热法制备了铁碳微球颗粒(FeOX@C),通过KBH4溶液改性获得了还原剂改性微球颗粒材料(Fe@C),考察了其活化过硫酸盐(PDS)对偶氮类染料活性黑5染料(RB5)废水的降解效能及其活化机制。结果表明,Fe@C活化PDS对RB5去除具备优异性能,脱色效率和萘环破坏效率分别为95.6%,48.4%;Fe@C、过硫酸盐投加量增加促进RB5脱色和萘环的破坏效率,随着RB5初始浓度的增加,去除效率逐渐降低;pH值为3和11降低了RB5脱色和萘环破坏速率,但两者的最终去除效率未出现明显差异;不同浓度SO_(4)^(2-)和Cl^(-)对体系中RB5去除效果的影响较小;不同影响因素对Fe@C/PDS体系RB5脱色速率和萘环破坏速率存在差异性,证明产生的活性物质优先攻击发色基团,再破坏萘环结构;在Fe@C/PDS体系中主要活性物质为单线态氧(^(1)O_(2)),且硫酸根自由基(SO_(4)·^(-))和羟基自由基(·OH)存在一定作用,表明降解主要遵循非自由基作用机制。
In order to degrade azo dye wastewater, iron carbon microspheres were prepared by the hydrothermal method(FeOX@C),the substance were changed by KBH_(4) solution to obtain the reducing agent modified microsphere particle material(Fe@C),the degradation efficiency and the activation mechanism of persulfate(PDS) activated by Fe@C on the azo dye, and the polluted wastewater Reactive Black 5 dye(RB5) were investigated.The results show that, the Fe@C activated PDS has excellent performance in the degradation and removal of RB5.The decolorization efficiency and naphthalene ring destruction efficiency are 95.6% and 48.4% respectively;The increase of the material Fe@C and persulfate dosage promoted the decolorization efficiency of RB5 and the destruction efficiency of naphthalene ring.It was also found that the degradation removal efficiency decreased gradually with the increase of the initial concentration of RB5;The initial pH values of 3 and 11 decreased the decolorization rate of RB5 and the destruction rate of naphthalene ring, but there was no significant difference in the final removal efficiency between them;It was found that different concentrations of anions such as SO_(4)^(2-)and Cl^(-) had little effect on the removal of RB5 in the system;Different influencing factors in the experiment,have differences between the decolorization rate of RB5 and the destruction rate of naphthalene ring in Fe@C/PDS System, which proves that the active substances produced preferentially attack the chromophore and then destroy the structure of naphthalene ring;The experiment showed that the main active substance in Fe@C/PDS degradation system is singlet oxygen(^(1)O_(2)),Also, the sulfate radical(SO4·^(-)) and the hydroxyl radical(·OH) play a certain role, indicating that the degradation mainly follows the non-free radical action mechanism.
作者
陶慧宇
邓琪
赵永花
周香琴
吴代赦
李东阳
马志飞
TAO Huiyu;DENG Qi;ZHAO Yonghua;ZHOU Xiangqin;WU Daishe;LI Dongyang;MA Zhifei(School of Resources&Environmental,Nanchang University,Nanchang 330031,China;Key Laboratory of Poyang Lake Environment and Resource Utilization(Ministry of Education),Nanchang University,Nanchang 330031,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China;Shenzhen Post Office Customs People's Republic of China,Shenzhen,Guangdong 518000,China)
出处
《南昌大学学报（理科版）》
CAS
北大核心
2023年第1期56-63,共8页
Journal of Nanchang University(Natural Science)
基金
国家自然科学基金资助项目(41907168)
国家重点研发计划项目(2018YFC1900904)。
