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Synthesis of Magnetic Short-Channel Mesoporous Silica SBA-15 Modified with a Polypyrrole/Polyaniline Copolymer for the Removal of Mercury Ions from Aqueous Solution
ACS Omega ( IF 3.7 ) Pub Date : 2021-09-23 , DOI: 10.1021/acsomega.1c04249 Jingtao Shen 1 , Shuyuan Zhang 1 , Zheng Zeng 1 , Jialun Huang 1 , Yi Shen 1 , Yongfu Guo 1, 2
ACS Omega ( IF 3.7 ) Pub Date : 2021-09-23 , DOI: 10.1021/acsomega.1c04249 Jingtao Shen 1 , Shuyuan Zhang 1 , Zheng Zeng 1 , Jialun Huang 1 , Yi Shen 1 , Yongfu Guo 1, 2
Affiliation
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A novel magnetic short-channel mesoporous silica SBA-15 composite adsorbent was prepared by the copolymerization of pyrrole and aniline. The prepared novel nanoadsorbent polypyrrole–polyaniline/CoFe2O4-SBA-15 (PPy-PANI/M-SBA-15) has a significant adsorption effect on heavy metal mercury ions. The batch adsorption experiment was carried out to study the effects of various parameters including solution pH, initial concentration (C0), adsorbent dose (dosage), temperature (T), and contact time on the adsorption effect. The analysis results of the response surface method (RSM) and central composite design (CCD) show that the importance for adsorption factors is pH > C0 > T > dosage, and the maximum capacity of PPy-PANI/M-SBA-15 is 346.2 mg/g under the optimal conditions of pH = 6.7, T = 310 K, C0 = 29.5 mg/L, and a dosage of 0.044 g/L. The pseudo-second-order kinetic model and the Langmuir isotherm model simulate the adsorption behavior of mercury ions. In addition, thermodynamic parameters indicate self-heating and reversible adsorption processes. A covalent bond is formed between the nitrogen-containing functional group and the mercury ions. Excellent magnetic properties and high reproducibility indicate that PPy-PANI/M-SBA-15 has excellent recyclability and environmentally friendly properties and can become a potential heavy metal ion adsorbent in practical applications.
中文翻译：
聚吡咯/聚苯胺共聚物改性磁性短通道介孔二氧化硅SBA-15的合成用于去除水溶液中的汞离子
以吡咯和苯胺共聚制备了一种新型磁性短通道介孔二氧化硅SBA-15复合吸附剂。制备的新型纳米吸附剂聚吡咯-聚苯胺/CoFe 2 O 4 -SBA-15（PPy-PANI/M-SBA-15）对重金属汞离子具有显着的吸附效果。进行间歇吸附实验，研究溶液pH、初始浓度( C 0 )、吸附剂剂量(dosage)、温度( T )、接触时间等各种参数对吸附效果的影响。响应面法（RSM）和中心组合设计（CCD）分析结果表明，吸附因素的重要性为pH > C 0 > T > 剂量，PPy-PANI/M-SBA-15的最大容量为在pH = 6.7、 T = 310 K、 C 0 = 29.5 mg/L、投加量0.044 g/L的最佳条件下，为346.2 mg/g。准二级动力学模型和Langmuir等温线模型模拟了汞离子的吸附行为。此外，热力学参数表明自加热和可逆吸附过程。含氮官能团和汞离子之间形成共价键。优异的磁性能和高重现性表明PPy-PANI/M-SBA-15具有优异的可回收性和环境友好性，在实际应用中可以成为潜在的重金属离子吸附剂。
更新日期：2021-10-06
中文翻译：
聚吡咯/聚苯胺共聚物改性磁性短通道介孔二氧化硅SBA-15的合成用于去除水溶液中的汞离子
以吡咯和苯胺共聚制备了一种新型磁性短通道介孔二氧化硅SBA-15复合吸附剂。制备的新型纳米吸附剂聚吡咯-聚苯胺/CoFe 2 O 4 -SBA-15（PPy-PANI/M-SBA-15）对重金属汞离子具有显着的吸附效果。进行间歇吸附实验，研究溶液pH、初始浓度( C 0 )、吸附剂剂量(dosage)、温度( T )、接触时间等各种参数对吸附效果的影响。响应面法（RSM）和中心组合设计（CCD）分析结果表明，吸附因素的重要性为pH > C 0 > T > 剂量，PPy-PANI/M-SBA-15的最大容量为在pH = 6.7、 T = 310 K、 C 0 = 29.5 mg/L、投加量0.044 g/L的最佳条件下，为346.2 mg/g。准二级动力学模型和Langmuir等温线模型模拟了汞离子的吸附行为。此外，热力学参数表明自加热和可逆吸附过程。含氮官能团和汞离子之间形成共价键。优异的磁性能和高重现性表明PPy-PANI/M-SBA-15具有优异的可回收性和环境友好性，在实际应用中可以成为潜在的重金属离子吸附剂。
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