Fe/C纳米复合材料制备及其处理含酚废水应用
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摘要
以淀粉为碳源,九水硝酸铁为铁源,经发酵、浸渍、碳热还原制备了系列铁/碳(Fe/C)纳米复合材料。通过X射线衍射、红外光谱、拉曼光谱、电感耦合等离子体发射光谱仪、循环伏安法等对制备的材料进行表征和测试,并考察了Fe/C复合材料对苯酚生产废水的处理性能。结果表明,Fe/C复合材料由非晶碳、铁纳米粒子构成,纳米铁颗粒晶粒尺寸在30～50 nm内。在反应温度30℃、时间为1 h,Fe/C复合材料投加量为1 g,Fe的质量分数20%的Fe/C复合材料对20 m L苯酚溶液(COD为500 mg/L)的去除率达95%;苯酚降解反应遵循准2级动力学模型。
Using starch as carbon source and with ferric nitrate nine hydrate as iron source, Fe/C nanocomposites were prepared by fermentation, impregnation and carbothermic reduction. The prepared materials were characterized and tested by XRD, IR, Raman, ICP-OES and cyclic voltammetry. The treatment performance of Fe/C composites for phenol production wastewater was also investigated. The results showed that the Fe/C material was composed of amorphous carbon and iron nanoparticles, and the nano-iron particles had a grain size in the range of 30～50 nm. When the reaction temperature was 30 ℃,the reaction time was 1 h and the amount of filler was 1 g, Fe mass concentration was 20% and phenol solution was 20 m L(COD was 500 mg/L), the removal rate of phenol in waste water reached 95%. The phenol degradation reaction followed a pseudo-second-order kinetics model.
Using starch as carbon source and with ferric nitrate nine hydrate as iron source, Fe/C nanocomposites were prepared by fermentation, impregnation and carbothermic reduction. The prepared materials were characterized and tested by XRD, IR, Raman, ICP-OES and cyclic voltammetry. The treatment performance of Fe/C composites for phenol production wastewater was also investigated. The results showed that the Fe/C material was composed of amorphous carbon and iron nanoparticles, and the nano-iron particles had a grain size in the range of 30～50 nm. When the reaction temperature was 30 ℃,the reaction time was 1 h and the amount of filler was 1 g, Fe mass concentration was 20% and phenol solution was 20 m L(COD was 500 mg/L), the removal rate of phenol in waste water reached 95%. The phenol degradation reaction followed a pseudo-second-order kinetics model.
引文
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[2]YUAN Y,DING Y J,WANG C H,et al.Multifunctional stiff carbon foam derived from bread[J].Acs Appl Mate Interfaces,2016,8:16852-16861.
[3]LIU R L,YIN F Y,ZHANG J F,et al.Intestine-like micro/mesoporous carbon built of chemically modified banana peel for size-selective separation of proteins[J].RSC Adv,2014,4:21465-21470.
[4]ROJO E,ALONSO M V,OLIET M,et al.Effect of fiber loading on the properties of treated cellulose fiber-reinforced phenolic composites[J].Composites,Part B 2015,68:185-192.
[5]SU H Y,XU Z,GAO C.Multifunctional,Ultra-flyweight,Synergistically assembled carbon aerogels[J].Adv Mater,2013,25:2554-2560.
[6]JIA Z Q,LI D,GUO H Y,et al.Preparation of mesoporus Fe/g-Cnanocomposite and its application in nickel-containing wastewater treatment[J].Chemistry&Bioengineering,2017,34(3):19-23.
[7]LI Q H,LIU M C.Removal of Ni2+from aqueous samples using composite materials of iron loaded activated carbon by micro-electrolysis[J].Chinese Journal of Environmental Engineering,2015,9(11):5455-5462.
[8]Zhou M h,Wu Z h.Electrocatalytic degradation of phenol-containing wastewater[J].Journal of Chemical Industry&Engineering,2002,53(1):40-44.
[9]李民,陈炜鸣,蒋国斌,等.Fe-Ce GAC催化臭氧降解高浓度腐殖酸废水[J].环境科学学报2017,37(9):3409-3418.
[10]李骋,樊金红,马鲁铭.Fe0/O2体系产生H2O2和·OH等活性氧化剂的研究进展[J].环境污染与防治,2012,34(10):76-81.
[11]WU L M,LIAO L B,LV G C,et al.Micro-electrolysis of Cr(VI)in the nanoscale zero-valent iron loaded activated carbon[J].Journal of Hazardous Materials,2013,254/255:277-283.
[12]LIU G,ZHOU Y Q,LIU Z Y,et al.Efficient nitrate removal using micro-electrolysis with zero valent iron/activated carbon nanocomposite[J].Journal of Chemical Technology and Biotechnology,2016,91(12):2942-2948.
[13]GAO Y,PRAMANIK A,BEGUM S,et al.Multifunctional biochar for highly efficient capture,identification,and removal of toxic metals and superbugs from water samples[J].ACS Omega,2017,2(11):7730-7738.
[14]MA J Q,YANG Q F,WEN Y Z,et al.Fe-g-C3N4/graphitized mesoporous carbon composite as an effective Fenton-like catalyst in a wide p H range[J].Applied Catalysis B:Environmental,2017,201:232-240.