| 纳米四氧化三铁对2,4-D的降解研究 |
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| 引用本文： | 方国东,司友斌.纳米四氧化三铁对2,4-D的降解研究[J].环境科学与技术,2010,33(1). |
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| 作者姓名： | 方国东 司友斌 |
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| 作者单位： | 安徽农业大学资源与环境学院,安徽,合肥,230036 |
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| 基金项目： | 国家863计划(2006AA06Z356);;国家973计划(2007CB936604);;安徽省科技攻关计划(07010302212);;安徽省人才开发资金(2007Z014) |
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| 摘 要： | 采用纳米Fe3O4降解溶液中的2,4-D,考察了2,4-D初始浓度、纳米Fe3O4的投加量、溶液pH对2,4-D降解效率的影响,并探讨了2,4-D的降解机理。实验结果表明,Fe3O4对2,4-D有明显的降解作用,纳米Fe3O4的降解效果优于微米级Fe3O4,降解过程中溶液中的氯离子浓度随着2,4-D的降解而升高,Fe3O4对2,4-D的降解机理是还原脱氯。当2,4-D初始浓度在0～10mg/L、纳米Fe3O4投加量0～300mg/L的范围内,2,4-D降解率随初始浓度和纳米Fe3O4投加量的增加而增大。在2,4-D初始浓度为10mg/L、pH3.0、纳米Fe3O4投加量300mg/L时降解效率最高,48h内2,4-D的降解率可达40%。
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| 关 键 词： | 纳米Fe_3O_4 2 4-D 降解 |
Degradation of 2, 4-D by Nano-scale Fe_3O_4 |
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| FANG Guo-dong,SI You-bin.Degradation of 2, 4-D by Nano-scale Fe_3O_4[J].Environmental Science and Technology,2010,33(1). |
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| Authors: | FANG Guo-dong SI You-bin |
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| Institution: | School of Resource and Environment;Anhui Agricultural University;Hefei 230036;China |
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| Abstract: | Nano-scale Fe3O4 was used to degrade 2,4-D in aqueous solution.Results showed that initial concentration of 2,4-D,pH and nano-scale Fe3O4 dosage were important factors for the degradation of 2,4-D.It was found that the decomposition efficiency of 2,4-D by nano-scale Fe3O4 was higher than micro-scale Fe3O4,and the concentration of chlorine ion increased with degradation of 2,4-D.It suggested that the degradation mechanism of 2,4-D was reductive dechlorination.Degradation of 2,4-D increased with increase of i... |
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| Keywords: | 2 4-D nano-scale Fe_3O_4 2 4-dichlorophenoxyacetic acid (2 4-D) degradation |
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