污泥质催化剂-过硫酸钾体系降解弱酸艳蓝的研究
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摘要
探讨了污泥质催化剂制备的最佳条件,同时分析了不同条件下污泥质催化剂-过硫酸钾体系对弱酸艳蓝的去除效果。污泥质催化剂最佳的制备条件为,污泥质量1 g,硫酸亚铁浓度0.2 mol/L,煅烧温度500℃,煅烧时间1 h。在pH值为3、过硫酸钾浓度为0.005 mol/L、催化剂投加量为0.05 g、反应30 min的条件下,该体系对弱酸艳蓝去除率可达92.79%。HPO_4~(2-)与HCO~-_3对整个反应具有较强的抑制作用。对制备的污泥质催化剂进行扫描电镜(SEM)和能谱分析(EDS),表明催化剂与原始污泥相比较Fe元素含量由原来的1%增加到16.34%;进一步做X射线衍射(XRD)分析可知,催化剂在2θ=20.72°,26.65°,50°处出现衍射峰,表明Fe元素存在形式主要为Fe_3O_4以及铁的氢氧化物Fe(OH)_3与FeOOH。
The optimal preparation conditions of the sludge-derived catalyst were investigated. Meanwhile, the degradation effect of weak acid brilliant blue by the sludge-derived catalyst and potassium persulfate system was analyzed. The optimal preparation conditions of the catalyst was that, sludge 1 g, ferrous sulfate concentration 0.2 mol/L, calcined temperature 500 ℃, calcined time 1 h. At the process conditions, pH value 3, catalyst 0.05 g, persulfate concentration 0.005 mol/L, the removal rate of weak acid brilliant blue was 92.79% at 30 min. The effect of coexistence ion was analyzed, HPO_4~(2-) and HCO~-_3 had strong inhibitory on the reaction system. In the addition, the scanning electron microscopy(SEM) and energy dispersive spectrometer(EDS) for the catalysts were measured. The SEM and EDS showed that compared the original sludge, the Fe element proportion increased from 1% to 16.34% in the catalyst. It meant that ferrous sulfate had good adhesion on the sludge. In the X-ray diffraction(XRD) spectra, the peaks appeared at 2θ=20.72°, 26.65°, 50°, it was shown that the Fe element existed as the form of Fe_3O_4, Fe(OH)_3 and FeOOH.
The optimal preparation conditions of the sludge-derived catalyst were investigated. Meanwhile, the degradation effect of weak acid brilliant blue by the sludge-derived catalyst and potassium persulfate system was analyzed. The optimal preparation conditions of the catalyst was that, sludge 1 g, ferrous sulfate concentration 0.2 mol/L, calcined temperature 500 ℃, calcined time 1 h. At the process conditions, pH value 3, catalyst 0.05 g, persulfate concentration 0.005 mol/L, the removal rate of weak acid brilliant blue was 92.79% at 30 min. The effect of coexistence ion was analyzed, HPO_4~(2-) and HCO~-_3 had strong inhibitory on the reaction system. In the addition, the scanning electron microscopy(SEM) and energy dispersive spectrometer(EDS) for the catalysts were measured. The SEM and EDS showed that compared the original sludge, the Fe element proportion increased from 1% to 16.34% in the catalyst. It meant that ferrous sulfate had good adhesion on the sludge. In the X-ray diffraction(XRD) spectra, the peaks appeared at 2θ=20.72°, 26.65°, 50°, it was shown that the Fe element existed as the form of Fe_3O_4, Fe(OH)_3 and FeOOH.
引文
[1]WANG Weimin, SONG Jia, HAN Xu. Schwertmannite as a new Fenton-like catalyst in the oxidation of phenol by H2O2[J]. Journal of Hazardous Materials, 2013, 262: 412-419.
[2]GAO Yuanyuan, GAN Huihui, ZHANG Gaoke, et al. Visible light assisted Fenton-like degradation of rhodamine B and 4-nitrophenol solutions with a stable poly-hydroxyl-iron/sepiolite catalyst[J]. Chemical Engineering Journal, 2013, 217: 221-230.
[3]LI Huanxuan, WAN Jinquan, MA Yongwen, et al. Reaction pathway and oxidation mechanisms of dibutyl phthalate by persulfate activated with zero-valent iron [J]. Science of the Total Environment, 2016, 562: 889-897.
[4]ZHOU Guoqiang, CHEN Ziwen, FANG Fei, et al. Fenton-like degradation of Methylene Blue using paper mill sludge-derived magnetically separable heterogeneous catalyst: Characterization and mechanism[J]. Journal of Environmental Sciences, 2015, 35: 20-26.
[5]徐夫元,李星,陈英文,等. 无机阴离子对CuO-H2O2氧化苯酚废水的影响[J]. 环境科学,2009,30(2):451-455.
[6]李亚峰,朱爱霞,庞晶晶,等. 无机离子对Fenton试剂处理苯酚废水效果影响的研究[J]. 沈阳建筑大学学报,2006,22(4):604-608.
[7]ZHANG Yalei, ZHANG Ke, DAI Chaomeng, et al. An enhanced Fenton reaction catalyzed by natural heterogeneous pyrite for nitrobenzene degradation in an aqueous solution [J]. Chemical Engineering Journal, 2014, 244: 438-445.
[8]柯昌君,江盼,吴维舟.粉煤灰蒸压活性的红外光谱研究[J].武汉理工大学学报,2009,31(7):35-39.
[9]赵晓光,刘转年,刘源.粉煤灰基成型吸附剂的制备及其对亚甲基蓝的吸附性能[J].硅酸盐学报,2009,37(10):1683-1688.
[2]GAO Yuanyuan, GAN Huihui, ZHANG Gaoke, et al. Visible light assisted Fenton-like degradation of rhodamine B and 4-nitrophenol solutions with a stable poly-hydroxyl-iron/sepiolite catalyst[J]. Chemical Engineering Journal, 2013, 217: 221-230.
[3]LI Huanxuan, WAN Jinquan, MA Yongwen, et al. Reaction pathway and oxidation mechanisms of dibutyl phthalate by persulfate activated with zero-valent iron [J]. Science of the Total Environment, 2016, 562: 889-897.
[4]ZHOU Guoqiang, CHEN Ziwen, FANG Fei, et al. Fenton-like degradation of Methylene Blue using paper mill sludge-derived magnetically separable heterogeneous catalyst: Characterization and mechanism[J]. Journal of Environmental Sciences, 2015, 35: 20-26.
[5]徐夫元,李星,陈英文,等. 无机阴离子对CuO-H2O2氧化苯酚废水的影响[J]. 环境科学,2009,30(2):451-455.
[6]李亚峰,朱爱霞,庞晶晶,等. 无机离子对Fenton试剂处理苯酚废水效果影响的研究[J]. 沈阳建筑大学学报,2006,22(4):604-608.
[7]ZHANG Yalei, ZHANG Ke, DAI Chaomeng, et al. An enhanced Fenton reaction catalyzed by natural heterogeneous pyrite for nitrobenzene degradation in an aqueous solution [J]. Chemical Engineering Journal, 2014, 244: 438-445.
[8]柯昌君,江盼,吴维舟.粉煤灰蒸压活性的红外光谱研究[J].武汉理工大学学报,2009,31(7):35-39.
[9]赵晓光,刘转年,刘源.粉煤灰基成型吸附剂的制备及其对亚甲基蓝的吸附性能[J].硅酸盐学报,2009,37(10):1683-1688.