| 二价铁活化过硫酸盐去除水中苯胺 |
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| 引用本文： | 常影,姜宁,雷抗,孙艳丰,周睿.二价铁活化过硫酸盐去除水中苯胺[J].世界地质,2014,33(3):702-707. |
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| 作者姓名： | 常影 姜宁 雷抗 孙艳丰 周睿 |
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| 作者单位： | 吉林大学 地下水资源与环境教育部重点实验室,长春 130021 |
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| 摘 要： | 零价铁和硝基苯反应后生成二价铁和苯胺,而苯胺也是地下水污染物。硫酸根自由基具有强氧化性,可以降解苯胺。而二价铁可以活化过硫酸盐产生硫酸根自由基,进而去除苯胺。本文研究了二价铁浓度、过硫酸盐浓度、苯胺初始浓度、体系初始pH、反应温度等因素对二价铁活化过硫酸盐去除水中苯胺处理效率的影响。结果表明:1)Fe2+活化过硫酸盐生成SO-4·能快速并有效氧化降解苯胺,对于目标浓度为1 000 mg/L的苯胺而言,Fe2+浓度为3.3 mmol/L,Na2S2O8浓度为4.4 mmol/L时,对苯胺有较佳降解效果,苯胺的降解率为86.33%。2体系对较低浓度的苯胺降解效果较好,当污染物初始浓度由1 000 mg/L降低到500 mg/L和100 mg/L时,苯胺降解率由86.33%升高为90.27%和97.16%。3初始pH对苯胺的降解率影响较大,中性条件下(pH=7左右)降解率较好,高初始pH(pH=9,11)和低初始pH条件(pH=3,5)下均低于中性条件下苯胺的降解效率。4体系的温度变化对降解率影响不明显。
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| 关 键 词： | 苯胺 过硫酸盐 Fe2+ |
Degradation of aniline by persulfate activated with ferrous ions |
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| CHANG Ying,JIANG Ning,LEI Kang,SUN Yan-Feng,ZHOU Rui.Degradation of aniline by persulfate activated with ferrous ions[J].World Geology,2014,33(3):702-707. |
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| Authors: | CHANG Ying JIANG Ning LEI Kang SUN Yan-Feng ZHOU Rui |
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| Institution: | Key Laboratory of Groundwater Ｒesources and Environment,Ministry of Education,Jilin University,Changchun 130021,China |
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| Abstract: | The products of the reaction between zero- valent iron and nitrobenzene are Fe 2 + and aniline,while aniline is the groundwater contaminant． Sulfate free radicals can degrade aniline with its strong oxidability,and they can be produced by persulfate activated by Fe2+． The authors studied the influences of some factors such as the initial concentrations of Fe2+, sulfate and aniline, pH and temperature, which were investigate to affect the aniline degradation． The results indicate that: ① Sulfate free radicals produced by persulfate activated with Fe2+ , can oxidized and degrade the target pollutant aniline fastly and effectively．The optimum degradation rate of aniline reached 86. 33% under the condition of 3. 3 mmol/L Fe2+,4. 4 mmol/L PS and 1 000 mg/L aniline． ②Low concentrative aniline was degraded more effectively in the system． The degradation rates of aniline increased from 86. 33% to 90%. 27% when the initial concentrations of the contaminant reduced from 1 000 mg/L to 500 mg/L, and it increased to 97. 16% when the concentration of aniline was 100 mg/L． ③ Initial pH had a great impact on the aniline degragation,as the degragation rate was higher under the neutral condition (around pH =7) than the alka- line (pH =9, 11) or acidic (pH =3,5) conditions． ④ The effect of the temperature in the system on the degra- dation rate was not notable． |
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| Keywords: | aniline persulfate " target="_blank">2+zz'')" href="#"> Fe2+ |
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