工程科学学报
工程科學學報
공정과학학보
Journal of University of Science and Technology Beijing
2015年
5期
86-92
,共7页
袁飞%冯雅丽%王维大%李浩然%黄玲%张士元
袁飛%馮雅麗%王維大%李浩然%黃玲%張士元
원비%풍아려%왕유대%리호연%황령%장사원
重金属废水%电沉积%碳纤维%零价铁%还原%铬
重金屬廢水%電沉積%碳纖維%零價鐵%還原%鉻
중금속폐수%전침적%탄섬유%령개철%환원%락
heavy metal wastewater%electrodeposition%carbon fiber%zero-valent iron%reduction%chromium
以碳纤维作为载体,采用电沉积法制备碳纤维负载零价铁( PCF-ZVI),利用扫描电镜、能谱仪及X射线衍射仪对其进行了表征,并考察了其对水溶液中Cr(VI)的去除效果.实验结果表明:碳纤维负载零价铁对水溶液中的Cr(VI)具有很好的去除效果.当铁碳质量比为2:1,投加量(以Fe0计)为2 g·L-1,Cr(VI)初始质量浓度为20 mg·L-1,pH值为5,反应时间40 min后,Cr(VI)的去除率可达99.96%,碳纤维上负载的零价铁对Cr(VI)的还原过程为准一级动力学,并且还原速率与反应温度的关系符合Arrhenius定律,反应活化能为20.683 kJ·mol-1.
以碳纖維作為載體,採用電沉積法製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瞭錶徵,併攷察瞭其對水溶液中Cr(VI)的去除效果.實驗結果錶明: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.噹鐵碳質量比為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40 min後,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,併且還原速率與反應溫度的關繫符閤Arrhenius定律,反應活化能為20.683 kJ·mol-1.
이탄섬유작위재체,채용전침적법제비탄섬유부재령개철( PCF-ZVI),이용소묘전경、능보의급X사선연사의대기진행료표정,병고찰료기대수용액중Cr(VI)적거제효과.실험결과표명:탄섬유부재령개철대수용액중적Cr(VI)구유흔호적거제효과.당철탄질량비위2:1,투가량(이Fe0계)위2 g·L-1,Cr(VI)초시질량농도위20 mg·L-1,pH치위5,반응시간40 min후,Cr(VI)적거제솔가체99.96%,탄섬유상부재적령개철대Cr(VI)적환원과정위준일급동역학,병차환원속솔여반응온도적관계부합Arrhenius정률,반응활화능위20.683 kJ·mol-1.
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 per-formance was investigated to apply in chromium( VI) removal. It was shown that the carbon fiber carrying Fe0 had good effect on chro-mium(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 dos-age of 2g·L-1, the initial Cr(VI) concentration of 20mg?L-1, pH 5, and the reaction time of 40min. 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 .