.608· 工程科学学报，第41卷，第5期 15 (a) 降解率TOC去除率 (b) 100 畅 -20 60 0 -10 20 -15 -600-400-2000200400600 2 磁场强度kA·m 循环次数 图9产物H-C500的磁滞回线图(a)及其循环利用降解RhB实验图(b) Fig.9 Hysteresis loops of product H-C500 (a)and its recycling study of the degradation of RhB (b) 第一次的97.8%降低到95.4%，同时T0C去除率 -H-C500 -循环后H-C500 由第一次的77.8%降低到73.6%，降低降幅很小. 此催化剂表现出良好的循环稳定性，具有实际利用 价值. 皮 参考文献 [1]Turhan K,Durukan I,Ozturkcan S A,et al.Decolorization of JCPD5:96-900-3785 textile basic dye in aqueous solution by ozone.Dyes Pigments, 立方晶系MgFe0 2012,92(3):897 LL [2]Singh K,Arora S.Removal of synthetic textile dyes from 50 60 70 80 20M9 wastewaters:a critical review on present treatment technologies. Crit Rer Enriron Sci Technol,2011,41(9):807 图10H-C500及其循环使用三次后试样的X射线衍射图谱 [3]Pliego G,Zazo J A,Garcia-Munioz P,et al.Trends in the intensi- Fig.10 XRD patterns of samples H-C500 and used H-C500 after fication of the Fenton process for wastewater treatment:an over three successive recycles view.Crit Rev Environ Sci Technol,2015,45(24):2611 [4]Nidheesh PV.Heterogeneous Fenton catalysts for the abatement of 3结论 organic pollutants from aqueous solution:a review.RSC Ade, 2015,5(51):40552 (1)采用酸浸-水热-煅烧法从腐泥土型红土镍 [5]Navalon S,Alvaro M,Garcia H.Heterogeneous Fenton catalysts 矿中制备了MgFe,O,纳米粒子.通过X射线光电子 based on clays,silicas and zeolites.Appl Catal B:Eniron, 能谱分析结果确定水热并经过500℃煅烧产物 2010,99(1-2):1 H-C500为Ni、Al等多金属共掺杂型MgFe,O,根据 [6]Munoz M,de Pedro Z M,Casas JA,et al.Preparation of magne- tite-based catalysts and their application in heterogeneous Fenton 分峰结果得出共掺杂型化学式为[Ni。.sA山.15Mgu.40 oxidation-A review.Appl Catal B:Environ,2015,176-177:249 Fen.u]ra[Nin.7Alo o Mgo1.oFeL6]o04.此外，少部 [7]Zhong Y H,Liang X L,He Z S,et al.The constraints of transi- 分Mg0存在于所制备H-C500中. tion metal substitutions (Ti,Cr,Mn,Co and Ni)in magnetite on (2)以水热和水热后经不同温度煅烧的产物作 its catalytic activity in heterogeneous Fenton and UV/Fenton reac- 为异相类Fenton试剂降解RhB.通过对比可知，水 tion:from the perspective of hydroxyl radical generation.Appl Catal B:Environ,2014.150-151:612 热并经过500℃煅烧的试样H-C500效果最好.在 [8]Liang X L,He Z S,Zhong Y H,et al.The effect of transition 45℃、pH值为6.44、催化剂用量0.625gL-1、H202 metal substitution on the catalytic activity of magnetite in heteroge- 体积分数为1.0%条件下，经过300min对10mg· neous Fenton reaction:in interfacial view.Colloids Surf A:Physi- L1的hB溶液降解率可达到97.8%，同时TOC去 cochem Eng Aspects,2013,435:28 除率达到77.8% [9] Wang Y B,Zhao H Y,Li M F,et al.Magnetic ordered meso- porous copper ferrite as a heterogeneous Fenton catalyst for the (3)所制备的催化剂H-C500具有亚铁磁性， degradation of imidacloprid.Appl Catal B:Enriron,2014,147: 通过磁回收重复使用3次，对RhB溶液的降解率由 534工程科学学报,第 41 卷,第 5 期 图 9 产物 H鄄鄄C500 的磁滞回线图(a)及其循环利用降解 RhB 实验图(b) Fig. 9 Hysteresis loops of product H鄄鄄C500 (a) and its recycling study of the degradation of RhB (b) 图 10 H鄄鄄C500 及其循环使用三次后试样的 X 射线衍射图谱 Fig. 10 XRD patterns of samples H鄄鄄 C500 and used H鄄鄄 C500 after three successive recycles 3 结论 (1)采用酸浸鄄鄄水热鄄鄄煅烧法从腐泥土型红土镍 矿中制备了 MgFe2O4 纳米粒子. 通过 X 射线光电子 能谱分析结果确定水热并经过 500 益 煅烧产物 H鄄鄄C500为 Ni、Al 等多金属共掺杂型 MgFe2O4 ,根据 分峰结果得出共掺杂型化学式为[Ni 0郾 08Al 0郾 15 Mg0郾 40 Fe0郾 94 ] Tet [Ni 0郾 17 Al 0郾 10 Mg0郾 10 Fe1郾 06 ] Oct O4 . 此外,少部 分 MgO 存在于所制备 H鄄鄄C500 中. (2)以水热和水热后经不同温度煅烧的产物作 为异相类 Fenton 试剂降解 RhB. 通过对比可知,水 热并经过 500 益煅烧的试样 H鄄鄄 C500 效果最好. 在 45 益 、pH 值为 6郾 44、催化剂用量 0郾 625 g·L - 1 、H2O2 体积分数为 1郾 0% 条件下,经过 300 min 对 10 mg· L - 1的 RhB 溶液降解率可达到 97郾 8% ,同时 TOC 去 除率达到 77郾 8% . (3)所制备的催化剂 H鄄鄄 C500 具有亚铁磁性, 通过磁回收重复使用 3 次,对 RhB 溶液的降解率由 第一次的 97郾 8% 降低到 95郾 4% ,同时 TOC 去除率 由第一次的 77郾 8% 降低到 73郾 6% ,降低降幅很小. 此催化剂表现出良好的循环稳定性,具有实际利用 价值. 参 考 文 献 [1] Turhan K, Durukan I, Ozturkcan S A, et al. Decolorization of textile basic dye in aqueous solution by ozone. Dyes Pigments, 2012, 92(3): 897 [2] Singh K, Arora S. Removal of synthetic textile dyes from wastewaters: a critical review on present treatment technologies. Crit Rev Environ Sci Technol, 2011, 41(9): 807 [3] Pliego G, Zazo J A, Garcia鄄Mu觡oz P, et al. Trends in the intensi鄄 fication of the Fenton process for wastewater treatment: an over鄄 view. Crit Rev Environ Sci Technol, 2015, 45(24): 2611 [4] Nidheesh P V. Heterogeneous Fenton catalysts for the abatement of organic pollutants from aqueous solution: a review. RSC Adv, 2015, 5(51): 40552 [5] Navalon S, Alvaro M, Garcia H. Heterogeneous Fenton catalysts based on clays, silicas and zeolites. Appl Catal B: Environ, 2010, 99(1鄄2): 1 [6] Munoz M, de Pedro Z M, Casas J A, et al. Preparation of magne鄄 tite鄄based catalysts and their application in heterogeneous Fenton oxidation鄄A review. Appl Catal B: Environ, 2015, 176鄄177: 249 [7] Zhong Y H, Liang X L, He Z S, et al. The constraints of transi鄄 tion metal substitutions (Ti, Cr, Mn, Co and Ni) in magnetite on its catalytic activity in heterogeneous Fenton and UV/ Fenton reac鄄 tion: from the perspective of hydroxyl radical generation. Appl Catal B: Environ, 2014, 150鄄151: 612 [8] Liang X L, He Z S, Zhong Y H, et al. The effect of transition metal substitution on the catalytic activity of magnetite in heteroge鄄 neous Fenton reaction: in interfacial view. Colloids Surf A: Physi鄄 cochem Eng Aspects, 2013, 435: 28 [9] Wang Y B, Zhao H Y, Li M F, et al. Magnetic ordered meso鄄 porous copper ferrite as a heterogeneous Fenton catalyst for the degradation of imidacloprid. Appl Catal B: Environ, 2014, 147: 534 ·608·