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三维花形层状双金属氢氧化物对甲基橙和亚甲基蓝的去除 被引量:2

The removal of methyl orange and methylene blue by 3D flower-like hierarchical layered double hydroxide microspheres
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摘要 采用软模板法制备有机三维花形层状双金属氢氧化物(O3D-LDH)。通过静态吸附实验考察不同投加量、反应时间、染料初始浓度条件下,O3D-LDH对甲基橙(MO)和亚甲基蓝(MB)的吸附性能,并结合XRD、SEM、FT-IR等测试表征手段探究其反应机制。结果表明,当吸附剂投加量分别为1.0和2.5 g·L-1时,O3D-LDH对MO和MB的去除效果最佳;反应时间均在360 min达到平衡;初始浓度为200 mg·L-1时,O3D-LDH对MO和MB的最大吸附量分别为174.20和57.46 mg·g-1。O3D-LDH对MO的去除机制主要为离子交换作用,对MB的去除机制主要为表面物理吸附。 In this work,organic three-dimensional flower-like LDH(O3D-LDH)was synthesized by soft template method.The adsorption properties of O3D-LDH on methyl orange(MO)and methylene blue(MB)were investigated by static adsorption experiments at different dosages,reaction time and initial dye concentrations.In addition,the reaction mechanisms of O3D-LDH to MO and MB were explored by test characterization methods of XRD,SEM and FT-IR.The results showed that when the adsorption dosages were 1.0 g·L-1 and 2.5 g·L-1,the removal efficiency of O3D-LDH on MO and MB were the best,respectively;the reaction time reached equilibrium at 360 min;when the initial concentrations were 200 mg·L-1,the adsorption amounts of O3D-LDH on MO and MB were 174.20 mg·g-1 and 57.46 mg·g-1,respectively.Moreover,the removal mechanism of O3D-LDH to MO is mainly ion exchange,while the removal mechanism of O3D-LDH to MB is mainly surface physical adsorption.
作者 章萍 潘雪梅 王亲媛 孙兆怡 马若男 ZHANG Ping;PAN Xuemei;WANG Qinyuan;SUN Zhaoyi;MA Ruonan(School of Resources,Environmental and Chemical Engineering,Nanchang University,Nanchang 330031,China;Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang University,Nanchang 330047,China)
出处 《南昌大学学报(理科版)》 CAS 北大核心 2019年第2期162-167,共6页 Journal of Nanchang University(Natural Science)
基金 国家自然科学基金资助项目(21767018) 江西省杰出青年人才基金资助项目(20171BCB23017) 中国博士后基金资助项目(2017M612164) 江西省博士后择优基金资助项目(2017KY47)
关键词 三维花状LDH 甲基橙 亚甲基蓝 离子交换 静电吸附 O3D-LDH methyl orange methylene blue ion exchange electrostatic adsorption
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