碳纖維負載零價鐵的制備及其去除水溶液中的六價鉻

袁飛; 馮雅麗; 王維大; 李浩然; 黃玲; 張士元

doi:10.13374/j.issn2095-9389.2015.05.014

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碳纖維負載零價鐵的制備及其去除水溶液中的六價鉻

doi: 10.13374/j.issn2095-9389.2015.05.014

1. 北京科技大學土木與環境工程學院, 北京 100083;
2. 中國科學院過程工程研究所生化工程國家重點實驗室, 北京 100190;
3. 華北科技學院環境工程學院, 北京 101601

基金項目:

中國大洋礦產資源研究計劃資助項目(DY125-15-T-08)

國家自然科學基金資助項目(21176026,21176242)

中央高校基本科研業務費資助項目(FRT-TP-09-002B)

詳細信息

通訊作者:
馮雅麗,E-mail:ylfeng126@126.com

中圖分類號: X703.5
計量
- 文章訪問數: 170
- HTML全文瀏覽量: 16
- PDF下載量: 7
- 被引次數: 0
出版歷程
- 收稿日期: 2014-08-13
- 網絡出版日期: 2021-07-10

Preparation of carbon fiber-supported zero-valent iron and their performance in chromium(VI) removal from aqueous solutions

1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, 100083, China;
2. National Key State Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, China;
3. School of Environmental Engineering, North China Institute of Science and Technology, Beijing 101601, China

摘要

摘要: 以碳纖維作為載體,采用電沉積法制備碳纖維負載零價鐵(PCF^-ZVI),利用掃描電鏡、能譜儀及X射線衍射儀對其進行了表征,并考察了其對水溶液中Cr(VI)的去除效果.實驗結果表明:碳纖維負載零價鐵對水溶液中的Cr(VI)具有很好的去除效果.當鐵碳質量比為2∶1,投加量(以Fe⁰計)為2 g·L^-1,Cr(VI)初始質量濃度為20 mg·L^-1,pH值為5,反應時間40min后,Cr(VI)的去除率可達99.96%,碳纖維上負載的零價鐵對Cr(VI)的還原過程為準一級動力學,并且還原速率與反應溫度的關系符合Arrhenius定律,反應活化能為20.683 k J·mol^-1.
- 重金屬廢水 /
- 電沉積 /
- 碳纖維 /
- 零價鐵 /
- 還原 /
- 鉻
Abstract: Carbon fiber carrying Fe⁰(PCF^-ZVI) was prepared by the electrodeposition method. The carbon fiber carrying Fe⁰ was characterized by scanning electron microscope/energy dispersive spectroscopy(SEM/EDS) and X-ray diffraction(XRD),and its performance was investigated to apply in chromium(VI) removal. It was shown that the carbon fiber carrying Fe⁰ had good effect on chromium(VI) removal in aqueous solutions. The removal efficiency could be up to 99.96% at the Fe⁰/C mass ratio of 2:1,the Fe⁰ dosage of 2 g·L^-1,the initial Cr(VI) concentration of 20 mg·L^-1,pH 5,and the reaction time of 40 min. The reaction process was fitted by the pseudo first order reduction kinetics model. The relationship between the rate of reduction and the reaction temperature accorded with the Arrhenius law,and the reaction activation energy was 20.683 kJ ·mol^-1.
- heavy metal wastewater /
- electrodeposition /
- carbon fiber /
- zero-valent iron /
- reduction /
- chromium