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Removing atrazine herbicide from water with an efficient metal–organic framework
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2023-12-08 , DOI: 10.1002/aoc.7334 Faisal K. Algethami 1 , Ehab A. Abdelrahman 1 , Yasmeen G. Abou El‐Reash 1 , Ahmed Shahat 2
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2023-12-08 , DOI: 10.1002/aoc.7334 Faisal K. Algethami 1 , Ehab A. Abdelrahman 1 , Yasmeen G. Abou El‐Reash 1 , Ahmed Shahat 2
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Metal–organic framework (MOF) synthesis has been studied for over 50 years, yet its use in adsorbing herbicides is still under investigation. This study examined the effects of amino-MIL-101(Fe) on the adsorption and removal of atrazine (AZ). The novel amino-MIL-101(Fe) nanoadsorbent has been completely characterized after and before the adsorption process using Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM), X-ray diffraction (XRD), energy-dispersive X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption–desorption isotherm. The Brunauer–Emmett–Teller (BET) surface area of the novel amino-MIL-101(Fe) nanoadsorbent before and after five-time reuse were 1222 and 1038 m2/g, respectively. The amino-MIL-101(Fe) nanoadsorbent was found to have the greatest adsorption capacity (qmax) of 321.55 mg/g. Variables such as herbicide concentration, pH, adsorbent dosage, and temperature that affect the adsorption process have been investigated. It was found that the ideal conditions for high adsorption capacity were pH 4 and a dose of 0.02 g. The adsorption isotherm and the kinetic isotherm were fitted to the Langmuir equation and the pseudo-second-order equation, respectively. The chemisorption mechanism was identified as the driving force. According to adsorption thermodynamics, the adsorption process was spontaneous and endothermic. The quantities of AZ adsorbed grew along with the temperature. The amino-MIL-101(Fe) nanoadsorbent can be reused up to five times with no change in its chemical composition and identical results from XRD before and after reuse. The mechanism of interaction by which the amino-MIL-101(Fe) interacted with the AZ has been represented.
中文翻译：
利用高效的金属有机框架去除水中的莠去津除草剂
金属有机骨架 (MOF) 合成的研究已有 50 多年的历史，但其在吸附除草剂方面的应用仍在研究中。本研究考察了氨基-MIL-101(Fe)对莠去津(AZ)吸附和去除的影响。使用傅里叶变换红外（FTIR）光谱、扫描电子显微镜（SEM）、X射线衍射（XRD）、能量色散X射线分析仪对新型氨基-MIL-101（Fe）纳米吸附剂在吸附过程前后进行了完全表征。射线光电子能谱（XPS）和氮气吸附-解吸等温线。新型氨基-MIL-101(Fe)纳米吸附剂在五次重复使用之前和之后的Brunauer-Emmett-Teller (BET)表面积分别为1222和1038 m 2 /g。发现氨基-MIL-101(Fe)纳米吸附剂的最大吸附容量(q max )为321.55 mg/g。对除草剂浓度、pH、吸附剂用量和温度等影响吸附过程的变量进行了研究。结果发现，获得高吸附容量的理想条件是pH 4和剂量0.02 g。吸附等温线和动力学等温线分别拟合Langmuir方程和准二阶方程。化学吸附机制被确定为驱动力。根据吸附热力学，吸附过程是自发的、吸热的。 AZ的吸附量随着温度的升高而增加。氨基-MIL-101(Fe)纳米吸附剂可重复使用多达五次，其化学成分没有变化，并且重复使用前后的XRD结果相同。氨基-MIL-101(Fe) 与 AZ 相互作用的相互作用机制已得到阐述。
更新日期：2023-12-08
中文翻译：
利用高效的金属有机框架去除水中的莠去津除草剂
金属有机骨架 (MOF) 合成的研究已有 50 多年的历史，但其在吸附除草剂方面的应用仍在研究中。本研究考察了氨基-MIL-101(Fe)对莠去津(AZ)吸附和去除的影响。使用傅里叶变换红外（FTIR）光谱、扫描电子显微镜（SEM）、X射线衍射（XRD）、能量色散X射线分析仪对新型氨基-MIL-101（Fe）纳米吸附剂在吸附过程前后进行了完全表征。射线光电子能谱（XPS）和氮气吸附-解吸等温线。新型氨基-MIL-101(Fe)纳米吸附剂在五次重复使用之前和之后的Brunauer-Emmett-Teller (BET)表面积分别为1222和1038 m 2 /g。发现氨基-MIL-101(Fe)纳米吸附剂的最大吸附容量(q max )为321.55 mg/g。对除草剂浓度、pH、吸附剂用量和温度等影响吸附过程的变量进行了研究。结果发现，获得高吸附容量的理想条件是pH 4和剂量0.02 g。吸附等温线和动力学等温线分别拟合Langmuir方程和准二阶方程。化学吸附机制被确定为驱动力。根据吸附热力学，吸附过程是自发的、吸热的。 AZ的吸附量随着温度的升高而增加。氨基-MIL-101(Fe)纳米吸附剂可重复使用多达五次，其化学成分没有变化，并且重复使用前后的XRD结果相同。氨基-MIL-101(Fe) 与 AZ 相互作用的相互作用机制已得到阐述。
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