Gutiérrez-Segura E, Solache-Ríos M, Colín-Cruz A
Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón y Tollocan s/n., C.P. 50000 Toluca Estado de México, Mexico.
J Hazard Mater. 2009 Oct 30;170(2-3):1227-35. doi: 10.1016/j.jhazmat.2009.05.102. Epub 2009 May 28.
Indigo carmine removal from aqueous solution has been evaluated using Fe-zeolitic tuff and carbonaceous material from pyrolyzed sewage sludge treated with HCl (CM). The adsorbents were characterized by scanning electron microscopy, BET surface area and X-ray diffraction. Sorption kinetics and isotherms were determined and the adsorption behaviors analyzed. Kinetic pseudo-second order and Langmuir-Freundlich models were successfully applied to the experimental results obtained with the Fe-zeolitic material, while kinetic first order and Langmuir-Freundlich models were applied to the results from the carbonaceous materials. This indicates mechanisms of chemisorption and physical sorption, respectively, on the heterogeneous materials. The results indicate that the carbonaceous material from the pyrolysis of sewage sludge (sorption capacity 92.83 mg/g) is a better adsorbent of indigo carmine than the zeolitic material (sorption capacity 32.83 mg/g).
已使用铁沸石凝灰岩和经盐酸处理的热解污水污泥中的碳质材料（CM）评估了从水溶液中去除靛蓝胭脂红的效果。通过扫描电子显微镜、BET表面积和X射线衍射对吸附剂进行了表征。测定了吸附动力学和等温线，并分析了吸附行为。动力学准二级模型和Langmuir-Freundlich模型成功应用于铁沸石材料的实验结果，而动力学一级模型和Langmuir-Freundlich模型应用于碳质材料的结果。这分别表明了在非均质材料上的化学吸附和物理吸附机制。结果表明，污水污泥热解产生的碳质材料（吸附容量92.83 mg/g）比沸石材料（吸附容量32.83 mg/g）对靛蓝胭脂红的吸附效果更好。
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