Functional group-rich hyperbranched magnetic material for simultaneous efficient removal of heavy metal ions from aqueous solution
| Autor: | Ruirui Yue, Huicai Wang, Feng Gao, Ruili Ren, Xiaolei Wang, Zhiyun Kong, Zhenwen Wang, Junfu Wei |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
021110 strategic
defence & security studies Langmuir Environmental Engineering Aqueous solution Ternary numeral system Chemistry Health Toxicology and Mutagenesis Metal ions in aqueous solution Inorganic chemistry 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences 01 natural sciences Pollution Adsorption Zeta potential Environmental Chemistry Density functional theory Ternary operation Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Journal of hazardous materials. 384 |
| ISSN: | 1873-3336 |
| Popis: | In order to achieve the purpose of simultaneous removal of coexisting heavy metal ions, in this work, functionalized magnetic mesoprous nanomaterials (Fe3O4-HBPA-ASA) with high density and multiple adsorption sites were designed and prepared. The obtained Fe3O4-HBPA-ASA was characterized by SEM, FTIR, VSM, TGA and zeta potential. Cu(II), Pb(II) and Cd(II) were chosen as the model heavy metal ions, the adsorption experiments showed that Fe3O4-HBPA-ASA showed hightheoretical adsorption capacitiesin individual system, and the maximum adsorption capacity was 136.66 mg/g, 88.36 mg/g and 165.46 mg/g, respectively. In the binary and ternary systems, the competitive adsorption leads to a decrease in the adsorption capacity of Cu(II), Pb(II) and Cd(II). However, in the ternary system with a concentration lower than 15 mg/L, the simultaneous removal rate was still higher than 90%. The adsorption isotherms and kineticswere well fitted by Langmuir and pseudo-second-order models, respectively. The XPS and density functional theory (DFT) analysis have confirmed that the adsorption of metal ions was related to various types of functional groups on the surface of Fe3O4-HBPA-ASA, while the adsorption mechanisms of Cu(II), Cd(II) and Pb(II) were different. |
| Databáze: | OpenAIRE |
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