Excellent performance of copper based metal organic framework in adsorptive removal of toxic sulfonamide antibiotics from wastewater
Excellent performance of copper based metal organic framework in adsorptive removal of toxic sulfonamide antibiotics from wastewater
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DOI：
10.1016/j.jcis.2016.06.032
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发表时间：
2016-09-15
影响因子：
9.9
通讯作者：
Wang, Shaobin
中科院分区：
文献类型：
--
作者：
Azhar, Muhammad Rizwan;Abid, Hussein Rasool;Wang, Shaobin
对水中磺胺类抗生素毒性的关注日益增加，需要迅速采取行动，建立有效的废水处理工艺来去除它们。本研究首次采用金属有机骨架（MOF）吸附去除废水中的磺胺类抗生素磺胺吡啶（SCP）。采用简便的方法合成了高表面积热稳定的MOF hust -1。利用HKUST-1系统地进行了批量吸附研究。高比表面积和不饱和金属位点使其具有显著的吸附能力和更快的动力学。大部分SCP在15 min内被去除，动力学数据与伪二阶模型拟合最好。此外，等温数据最适合Langmuir模型。热力学结果表明，吸附是一个自发的吸热过程。hust -1在298 K下的吸附量为384 mgig，是大多数抗菌素材料中最高的。高吸附能力主要归因于π - π堆积、氢键和静电相互作用。(C) 2016 Elsevier Inc.版权所有。
The increasing concerns on toxicity of sulfonamide antibiotics in water require a prompt action to establish efficient wastewater treatment processes for their removal. In this study, adsorptive removal of a model sulfonamide antibiotic, sulfachloropyridazine (SCP), from wastewater is presented for the first time using a metal organic framework (MOF). A high surface area and thermally stable MOF, HKUST-1, was synthesized by a facile method. Batch adsorption studies were systematically carried out using HKUST-1. The high surface area and unsaturated metal sites resulted in a significant adsorption capacity with faster kinetics. Most of the SCP was removed in 15 min and the kinetic data were best fitted with the pseudo second order model. Moreover, isothermal data were best fitted with the Langmuir model. The thermodynamic results showed that the adsorption is a spontaneous and endothermic process. The adsorption capacity of HKUST-1 is 384 mgig at 298 K which is the highest compared to most of the materials for the antibiotics. The high adsorption capacity is attributed mainly to pi-pi stacking, hydrogen bonding and electrostatic interactions. (C) 2016 Elsevier Inc. All rights reserved.