<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">

碳纖維負載零價鐵的制備及其去除水溶液中的六價鉻

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

  • 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.

     

    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.

     

/

返回文章
返回
<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">
259luxu-164