| 超声协同Fe0@Fe3O4降解四氯化碳 |
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| 引用本文： | 李虹,吕小凡,马溢阳,杨慧,杨琦.超声协同Fe0@Fe3O4降解四氯化碳[J].环境科学学报,2018,38(7):2650-2658. |
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| 作者姓名： | 李虹 吕小凡 马溢阳 杨慧 杨琦 |
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| 作者单位： | 中国地质大学(北京)水资源与环境工程北京市重点实验室 |
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| 基金项目： | 北京市产学研项目（No.51900265005）；国家水体污染控制与治理科技重大专项（No.2009ZX07207-008，2009ZX07419-002，2009ZX07207-001，2015ZX07406005-001）；中央高校基本科研业务费专项资金（No.2652013101，2652013086，2652013087）；国家重大科学仪器设备开发专项（No.2012YQ060115） |
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| 摘 要： | 采用附着在Fe_3O_4纳米颗粒上的纳米零价铁(n ZVI)对四氯化碳(CCl4)还原脱氯.同时,利用SEM和BET等技术对Fe~0@Fe_3O_4的表面形貌和粒径进行表征,探究了不同反应条件如Fe~0@Fe_3O_4投加量、超声功率、初始pH值、温度和CCl4初始浓度对CCl4去除率的影响.最后,比较了Fe~0@Fe_3O_4、n ZVI和Fe_3O_4颗粒对CCl4的去除效果.结果表明,Fe~0@Fe_3O_4比n ZVI比表面积更大、分散性更好.超声功率和温度的提高对CCl4的降解有明显的促进作用.在最佳条件(催化剂投加量0.5 g·L-1,超声功率300 W,初始pH=7.0,温度30℃,CCl4初始浓度2 mg·L-1)下,Fe~0@Fe_3O_4复合材料在60 min内对CCl4的去除效率为88.5%,明显高于n ZVI(60.9%)和Fe_3O_4颗粒(13.2%).Fe~0@Fe_3O_4对CCl4去除过程符合伪一级动力学模型.
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| 关 键 词： | 四氯化碳 降解 纳米Fe0@Fe3O4 伪一级动力学 |
| 收稿时间： | 2017/12/20 0:00:00 |
| 修稿时间： | 2018/1/26 0:00:00 |
Degradation of carbon tetrachloride by nanoscale zero-valent iron@magnetic Fe3O4 compound with ultrasound assistance |
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| LI Hong,L&#; Xiaofan,MA Yiyang,YANG Hui and YANG Qi.Degradation of carbon tetrachloride by nanoscale zero-valent iron@magnetic Fe3O4 compound with ultrasound assistance[J].Acta Scientiae Circumstantiae,2018,38(7):2650-2658. |
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| Authors: | LI Hong L&#; Xiaofan MA Yiyang YANG Hui and YANG Qi |
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| Institution: | Beijing Key Laboratory of Water Resources & Environmental Engineering, School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083,Beijing Key Laboratory of Water Resources & Environmental Engineering, School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083,Beijing Key Laboratory of Water Resources & Environmental Engineering, School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083,Beijing Key Laboratory of Water Resources & Environmental Engineering, School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083 and Beijing Key Laboratory of Water Resources & Environmental Engineering, School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083 |
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| Abstract: | |
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| Keywords: | carbon tetrachloride degradation nano-scale Fe0@Fe3O4 pseudo first order kinetics |
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