The Fe3O4@nSiO(2)@mSiO(2)/NTA (FNMs-NTA) was prepared by grafting magnetic mesoporous microspheres with nitrilotriacetic acid (NTA) and applied as an adsorbent for the removal of Cr(III) from complex solutions. Some characterization techniques including Brunauer-Emmett-Teller (BET), Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD), small-angle X-ray diffraction (SAXS), vibrating sample magnetometer (VSM), and thermal gravimetric analysis (TGA) were used to characterize functional groups and pore structure of FNMs-NTA, which proved that NTA was successfully decorated onto the magnetic Fe3O4@nSiO(2)@mSiO(2) (FNMs) and FNMs-NTA featured a regular mesoporous structure. The batch adsorption of Cr(III) by FNMs-NTA exhibited high adsorption capacity (16.0 mg center dot g(-1) at pH 3.0, and 25 degrees C). Adsorption data followed Freundlich isotherm and adsorption process was a spontaneous adsorption process. Moreover, the kinetics of adsorption were well explained by pseudo-second-order kinetic model. FNMs-NTA showed resistance to interfering inorganic cations (Na+, Ca2+) and complexing agents (EDTA). Furthermore, FNMs-NTA exhibited remarkable regeneration performance and easy separation under external magnetic field. X-ray photoelectron spectroscopy (XPS) analysis showed the FNMs-NTA had excellent adsorption ability for Cr(III) because of the ion exchange and surface complexation.
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Bhabha Atom Res Ctr, Fuel Reproc Div, Mumbai 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Radiat Safety Syst Div, Mumbai 400085, Maharashtra, India
Das, Debasish
Sureshkumar, M. K.
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Bhabha Atom Res Ctr, Radiat Safety Syst Div, Mumbai 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Radiat Safety Syst Div, Mumbai 400085, Maharashtra, India
Sureshkumar, M. K.
Radhakrishnan, K.
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Bhabha Atom Res Ctr, Fuel Reproc Div, Mumbai 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Radiat Safety Syst Div, Mumbai 400085, Maharashtra, India
Radhakrishnan, K.
Nuwar, J.
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Bhabha Atom Res Ctr, Div Chem, Mumbai 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Radiat Safety Syst Div, Mumbai 400085, Maharashtra, India
Nuwar, J.
Pillai, C. G. S.
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Bhabha Atom Res Ctr, Div Chem, Mumbai 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Radiat Safety Syst Div, Mumbai 400085, Maharashtra, India
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Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R ChinaShandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R China
Li, Xiaochen
Qi, Jinqiu
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Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R ChinaShandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R China
Qi, Jinqiu
Jiang, Ruixue
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Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R ChinaShandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R China
Jiang, Ruixue
Li, Jie
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Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R ChinaShandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R China
机构:
School of Environmental Science and Engineering, Shaanxi University of Science & Technology
Shaanxi Key Laboratory of Green Preparation and Functionalization of InorganicSchool of Environmental Science and Engineering, Shaanxi University of Science & Technology
Zhi Hu
Jiahong Wang
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School of Environmental Science and Engineering, Shaanxi University of Science & Technology
Shaanxi Key Laboratory of Green Preparation and Functionalization of InorganicSchool of Environmental Science and Engineering, Shaanxi University of Science & Technology
Jiahong Wang
Tongtong Sun
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School of Environmental Science and Engineering, Shaanxi University of Science & Technology
Shaanxi Key Laboratory of Green Preparation and Functionalization of InorganicSchool of Environmental Science and Engineering, Shaanxi University of Science & Technology