The research on reactive property and mechanism of Antioxidant-Fe(II)- montmorillonite for the removal of Cr(VI)
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摘要: 通过逐步加入抗坏血酸与硫酸亚铁盐到蒙脱石浆液，制备了一种环境友好型抗氧化型还原功能矿物材料(A-Fe(II)-Mt)；同时制备了单独加入Fe(II)离子改性的蒙脱石Fe(II)-Mt。系统对比考察这两种还原功能材料对Cr(VI)的去除性能。实验结果表明：pH为2-7范围内，A-Fe(II)-Mt去除效果最好，最大去除量为34.9mg/g，而Fe(II)-Mt为26.8 mg/g。反应90 min时间内趋于平衡，并符合假二级动力学方程。其中，A-Fe(II)-Mt 对Cr(VI)的去除过程：首先Cr(VI)阴离子被吸附到亚铁改性蒙脱石表面，接着被还原为低毒的Cr(III)，之后Cr(III)可能形成氢氧化物或被蒙脱石吸附而固定。这种去除六价铬的治理手段对于铬的稳定化处置具有高效和安全性，因而其应用前景广泛。
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关键词:
- 还原
Abstract: An environmentally friendly reductive function mineral materials, termed as antioxidant-Fe(II)-Montmorillonite (A-Fe(II)-Mt), is prepared using stepwise addition of ferrous ion and ascorbic acid (Vitamin C) with desired concentraions into the montmorillonite dispersion; meanwhile, an Fe-Mt is also prepared by adding ferrous ion alone. These two materials are investigated systematically for comparison to the ability of removal of Cr(VI) from aqueous solutions. The experimental results show that the optimum pH condition suitable for the Cr(VI) removal is the wide range of 2.0~7.0 with the maximum removals of Cr(VI) that are 34.9 and 26.8 mg/g for A-Fe(II)-Mt and Fe(II)-Mt, respectively. The relevant reactions reach equilibrium within 90 min and can highly follow the pseudo-second-order kinetic model. Among the Cr(VI) removal process associated with A-Fe(II)-Mt may be concluded that hexavalent chromium anion is first adsorbed onto the material surfaces, followed by the Cr(VI) reduction to the low toxic species of Cr(III) . After that, the Cr(III) ion is found to form chromic hydroxide, i.e. Cr(OH)3 and/or to be adsorbed onto montmorillonite. The treatment approach for the Cr(VI) removal is efficient and safe to the chromic stabilization, and hence its application is wide promising.-
Keywords:
- reduction
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[1]石玉敏, 王彤.铬渣解毒处理处置技术综述[J].化工环保, 2008, 28(6):471-477
[2]苏凯, 贺玉龙, 杨立中.改性蒙脱石吸附降解硝酸根离子的研究[J].岩石矿物, 2013, 33(3):7-12
[3] Manjanna J.Preparation of Fe(II)-montmorillonite by reduction of Fe(III)-montmorillonite with ascorbic acid[J].Applied Clay Science, 2008, 42(0):32-38
[4]吴德礼, 冯 勇, 马鲁铭.多羟基亚铁络合物还原转化活性黑的实验[J].同济大学学报, 2011, 39(11):1658-1662
[5] 范远, 陈金思.三氯化铁改性膨润土对铬(VI)的吸附性能研究[J].山东化工, 2010, 39(0):8-11
[6]周跃花, 杜晓莉, 李学坤, 等.有机-无机复合改性蒙脱石同时吸附水中苯酚和铬[J].环境化学, 2014, 33(4):664-668
[7]尹丽京, 李益民, 张璐吉, 等.羟基铝柱撑膨润土负载纳米铁还原[J].环境科学, 2009, 30(4):1056-1059
[8]徐建中, 邓海建, 张博, 等.抗坏血酸亚铁的合成及表征[J].化学工程师, 2008, 149(2):5-6
[9]李鹏波.铁基柱撑蒙脱石的研究进展[J].现代矿业, 2012, 521(9):83-85
[10] Yuan P, Fan M, Yang D, et al.Montmorillonite-supported magnetite nanoparticles for the removal of hexavalent chromium [Cr(VI)] from aqueous solutions[J].Journal of Hazardous Materials, 2009, 166(0):821-829
[11]邹雪华, 陈天虎, 刘海波, 等.热处理针铁矿的结构与色度演化[J].硅酸盐学报, 2013, 41(5):670-673
[12] Buerge I J, Hug S J.Influence of Mineral Surfaces on Chromium(VI) Reduction by Iron(II)[J].Environ.Sci.Technol, 1999, 33(0):4285-4291
[13] Buerge I J, Hug S J.Influence of Organic Ligands on Chromium(VI) Reduction by Iron(II) [J].Environ. Sci. Technol, 1998, 32(0):2092-2099
[14]张晓玲, 张庆乐, 张丽青, 等.膨润土负载羟基氧化铁对铬吸附的固体浓度效应[J].污染防治技术, 2013, 26(5):29-32
[15]陈修栋, 初本莉, 何宏平.微波柱撑蒙脱土的制备及其对茜素红的吸附[J].广东化工, 2011, 39(24):61-63
[16]丁伟, 程潇甫, 王伟杰, 等.羧基配位状态稳定性的理论研究[J].化学研究与应用, 2012, 24(2):243-347
[17]李仲民, 童张法, 蒋月秀, 等.羟基铁柱撑剂性能对柱撑蒙脱土层间距的影响[J].高校化学工程学报, 2007, 21(3):544-546
[18]王斌远, 陈忠林, 樊磊涛, 等.值还原处理含铬废水的影响及动力学研究[J].黑龙江自然科学学报, 2014, 31(3):356-360
[19] Thomashe Y, Chia-chenchen, Andsamuelj.Traina. Inhibited Cr(VI) Reduction by Aqueous Fe(II) under Hyperalkaline Conditions[J].Environ. Sci. Technol, 2004, 38(0):5535-5539
[20] 曲晓飞.磁铁矿、菱铁矿和四方纤铁矿的合成及其生物矿化意义 [D]. 合肥. 中国科技大学, 2011
[1]石玉敏, 王彤.铬渣解毒处理处置技术综述[J].化工环保, 2008, 28(6):471-477
[2]苏凯, 贺玉龙, 杨立中.改性蒙脱石吸附降解硝酸根离子的研究[J].岩石矿物, 2013, 33(3):7-12
[3] Manjanna J.Preparation of Fe(II)-montmorillonite by reduction of Fe(III)-montmorillonite with ascorbic acid[J].Applied Clay Science, 2008, 42(0):32-38
[4]吴德礼, 冯 勇, 马鲁铭.多羟基亚铁络合物还原转化活性黑的实验[J].同济大学学报, 2011, 39(11):1658-1662
[5] 范远, 陈金思.三氯化铁改性膨润土对铬(VI)的吸附性能研究[J].山东化工, 2010, 39(0):8-11
[6]周跃花, 杜晓莉, 李学坤, 等.有机-无机复合改性蒙脱石同时吸附水中苯酚和铬[J].环境化学, 2014, 33(4):664-668
[7]尹丽京, 李益民, 张璐吉, 等.羟基铝柱撑膨润土负载纳米铁还原[J].环境科学, 2009, 30(4):1056-1059
[8]徐建中, 邓海建, 张博, 等.抗坏血酸亚铁的合成及表征[J].化学工程师, 2008, 149(2):5-6
[9]李鹏波.铁基柱撑蒙脱石的研究进展[J].现代矿业, 2012, 521(9):83-85
[10] Yuan P, Fan M, Yang D, et al.Montmorillonite-supported magnetite nanoparticles for the removal of hexavalent chromium [Cr(VI)] from aqueous solutions[J].Journal of Hazardous Materials, 2009, 166(0):821-829
[11]邹雪华, 陈天虎, 刘海波, 等.热处理针铁矿的结构与色度演化[J].硅酸盐学报, 2013, 41(5):670-673
[12] Buerge I J, Hug S J.Influence of Mineral Surfaces on Chromium(VI) Reduction by Iron(II)[J].Environ.Sci.Technol, 1999, 33(0):4285-4291
[13] Buerge I J, Hug S J.Influence of Organic Ligands on Chromium(VI) Reduction by Iron(II) [J].Environ. Sci. Technol, 1998, 32(0):2092-2099
[14]张晓玲, 张庆乐, 张丽青, 等.膨润土负载羟基氧化铁对铬吸附的固体浓度效应[J].污染防治技术, 2013, 26(5):29-32
[15]陈修栋, 初本莉, 何宏平.微波柱撑蒙脱土的制备及其对茜素红的吸附[J].广东化工, 2011, 39(24):61-63
[16]丁伟, 程潇甫, 王伟杰, 等.羧基配位状态稳定性的理论研究[J].化学研究与应用, 2012, 24(2):243-347
[17]李仲民, 童张法, 蒋月秀, 等.羟基铁柱撑剂性能对柱撑蒙脱土层间距的影响[J].高校化学工程学报, 2007, 21(3):544-546
[18]王斌远, 陈忠林, 樊磊涛, 等.值还原处理含铬废水的影响及动力学研究[J].黑龙江自然科学学报, 2014, 31(3):356-360
[19] Thomashe Y, Chia-chenchen, Andsamuelj.Traina. Inhibited Cr(VI) Reduction by Aqueous Fe(II) under Hyperalkaline Conditions[J].Environ. Sci. Technol, 2004, 38(0):5535-5539
[20] 曲晓飞.磁铁矿、菱铁矿和四方纤铁矿的合成及其生物矿化意义 [D]. 合肥. 中国科技大学, 2011
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