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首页> 外文期刊>RSC Advances >Rapid and high-capacity adsorption of sulfonated anionic dyes onto basic bismuth(III) nitrate via bidentate bridging and electrostatic attracting interactions
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Rapid and high-capacity adsorption of sulfonated anionic dyes onto basic bismuth(III) nitrate via bidentate bridging and electrostatic attracting interactions

机译：通过二齿桥接和静电吸引相互作用将磺化阴离子染料的快速和高容量吸附磺化阴离子染料含有碱性铋（III）硝酸盐

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摘要

A new adsorbent of octahedron-structured basic bismuth(III) nitrate (OBBN), [Bi6O5(OH)(3)](NO3)(5)center dot 3H(2)O, was synthesized by a mild hydrolysis route and used for the adsorption removal of sulfonated anionic dyes (SADs) from aqueous solutions. A typical SAD, methyl orange (MO), was taken to investigate the adsorption processes at different pH, adsorbent dosage, contact time, temperature and initial MO concentration. The equilibrium adsorption data were well fitted by the Langmuir isotherm model and showed high adsorption capacity (q(max) = 1298 mg g(-1)). The adsorption kinetics was well described by the pseudo-second-order model and exhibited a short adsorption equilibrium time (<14 min for 20 mg L-1 MO). Adsorption thermodynamic parameters revealed that the adsorption is endothermic, random and spontaneous. The adsorption behavior was closely related to the combined interactions of bidentate bridging and electrostatic attraction between [Bi6O5(OH)(3)](5+) polycations on the OBBN surface and -SO3- groups of the SAD. The adsorbent was successfully applied to remove MO from model wastewater with a satisfactory result.
机译：通过温和的水解途径合成了一种新的八氮化型碱性铋（III）硝酸铋（OBBN），[Bi6O5（OH）（3）]（NO 3）（5）o中心点3H（2）o的吸附剂，并用于吸附从水溶液中去除磺化阴离子染料和（SAD）的。考虑典型的SAD，甲基橙（MO），以研究不同pH，吸附剂剂量，接触时间，温度和初始MO浓度的吸附过程。 Langmuir等温模型的平衡吸附数据很好地拟合，并且显示出高吸附容量（Q（最多）= 1298mg g（-1））。吸附动力学是由伪二阶模型良好的描述，并表现出短的吸附平衡时间（<14分钟，对于20mg L-1 Mo）。吸附热力学参数显示吸附是吸热，随机和自发的。吸附行为与二齿桥接和静电桥接和悲伤的静电桥接助剂之间的静电吸引的组合相互作用密切相关。成功应用吸附剂以从模型废水中除去MO，令人满意的结果。

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  • 来源
    《RSC Advances》 |2016年第46期|共9页
  • 作者

    Xiao Jiayang; Zhang Hui; Xia Yue; Li Zelin; Huang Wei;

  • 作者单位

    Hunan Normal Univ Key Lab Chem Biol &

    Tradit Chinese Med Res Natl &

    Local Joint Engn Lab New Petrochem Mat &

    F Minist Educ China Key Lab Assembly &

    Applicat Org Changsha 410081 Hunan Peoples R China;

    Hunan Normal Univ Key Lab Chem Biol &

    Tradit Chinese Med Res Natl &

    Local Joint Engn Lab New Petrochem Mat &

    F Minist Educ China Key Lab Assembly &

    Applicat Org Changsha 410081 Hunan Peoples R China;

    Hunan Normal Univ Key Lab Chem Biol &

    Tradit Chinese Med Res Natl &

    Local Joint Engn Lab New Petrochem Mat &

    F Minist Educ China Key Lab Assembly &

    Applicat Org Changsha 410081 Hunan Peoples R China;

    Hunan Normal Univ Key Lab Chem Biol &

    Tradit Chinese Med Res Natl &

    Local Joint Engn Lab New Petrochem Mat &

    F Minist Educ China Key Lab Assembly &

    Applicat Org Changsha 410081 Hunan Peoples R China;

    Hunan Normal Univ Key Lab Chem Biol &

    Tradit Chinese Med Res Natl &

    Local Joint Engn Lab New Petrochem Mat &

    F Minist Educ China Key Lab Assembly &

    Applicat Org Changsha 410081 Hunan Peoples R China;

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