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首页> 外文期刊>RSC Advances >Adsorption studies of Malachite green on 5-sulphosalicylic acid doped tetraethoxysilane (SATEOS) composite material
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Adsorption studies of Malachite green on 5-sulphosalicylic acid doped tetraethoxysilane (SATEOS) composite material

机译：孔雀石绿壤对5-磺酰水杨酸掺杂四乙氧基硅烷（Sateos）复合材料的吸附研究

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摘要

We report batch adsorption studies for the removal of Malachite green from an aqueous solution using 5-sulphosalicylic acid doped tetraethoxysilane (SATEOS) composite material, prepared in our laboratory previously. Various variables studied were the initial dye concentration, adsorbent concentration, pH, contact time and temperature. The maximum percentage of colour was removed at the basic pH of 9. The removal data were fitted to Langmuir and Freundlich adsorption isotherm equations. The values of their corresponding constants were determined from the slope and intercepts of their respective plots. The monolayer adsorption capacity of SATEOS at 323 K was found to be 657.89 mg g(-1). The values of various thermodynamic parameters, such as Delta G degrees, Delta S degrees and Delta H degrees, were also determined. A pseudo second-order kinetic model and Lagergren first-order kinetic model were also applied to study the adsorption process. The effective diffusion parameter D-i values were estimated at different initial dye concentrations. The mechanism of adsorption was studied using Rechienberg's equation where a linearity test indicates a film diffusion controlled adsorption mechanism. The maximum interaction (IE - 1432.54 kJ mol(-1)) between SATEOS and the dye molecule, calculated using B3PW91 functional and LanL2MB basis set, was observed when the nitrogen atom of the dye lies at a distance of 1.57 angstrom from the hydrogen of the hydroxyl group present on SATEOS molecule.
机译：我们报告了使用5-磺酰水溶基酸掺杂的四乙氧基硅烷（Sateos）复合材料从水溶液中除去孔雀石绿色的批量吸附研究，在我们的实验室中制备。研究的各种变量是初始染料浓度，吸附剂浓度，pH，接触时间和温度。在碱性pH下除去的最大颜色百分比。将去除数据安装在Langmuir和Freundlich吸附等温线方程。它们的相应常数的值是根据其各自图的斜率和截距确定的。发现323 k的Sateos的单层吸附能力为657.89mg（-1）。还确定了各种热力学参数的值，例如Delta G度，ΔS度和δH度。伪二阶动力学模型和Lagergren一阶动力学模型也应用于研究吸附过程。在不同的初始染料浓度下估计有效扩散参数D-I值。使用Rechienberg等式研究吸附机理，其中线性测试表明薄膜扩散控制吸附机构。当染料的氮原子位于与氢气的距离处于1.57埃的距离时，使用B3PW91功能和LANL2MB基础设施计算Sateos和染料分子之间的最大相互作用（IE - 1432.54 kJ mol（-1））。 Sateos分子上存在的羟基。

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  • 来源
    《RSC Advances》 |2015年第112期|共11页
  • 作者

    Ahad Sozia; Islam Nasarul; Bashir Arshid; Rehman Suhail-ul; Pandith Altaf Hussain;

  • 作者单位

    Univ Kashmir Dept Chem Srinagar 190006 Jammu &

    Kashmir India;

    Univ Kashmir Dept Chem Srinagar 190006 Jammu &

    Kashmir India;

    Univ Kashmir Dept Chem Srinagar 190006 Jammu &

    Kashmir India;

    Univ Kashmir Dept Chem Srinagar 190006 Jammu &

    Kashmir India;

    Univ Kashmir Dept Chem Srinagar 190006 Jammu &

    Kashmir India;

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  • 正文语种 eng
  • 中图分类 化学;
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