Preparation and Characterization of Mesoporous Magnesium Silicate Gels and Application for Cobalt(II) Removal
Two new mesoporous magnesium silicate gel adsorbents, MgO·2SiO2 and MgO·6SiO2, have been successfully prepared by hydrothermal method. The synthetic factors including reaction pH, temperature, time and calcination temperature were studied. The aiming
products were characterized by N2 adsorption/desorption isotherms, FT-IR spectroscopy and Scanning Electron Microscopy (SEM). The adsorption behaviors for cobalt ions were also systematically investigated. The results show that the reaction pH was the decisive factor for Si/Mg mole
ratios. The special surface areas are 534.29 m2 g−1 for MgO· 2SiO2 and 181.61 m2 g−1 for MgO· 6SiO2, respectively. The maximum adsorption capacities of MgO· 2SiO2 and MgO· 6SiO2
for cobalt ions are 135.5 and 52.5 mg g−1. Furthermore, the experimental data are well described by pseudo-second order adsorption and Langmuir isotherm models. The experiment would afford one excellent adsorbent for solving the wastewater pollution and also providing metal
cobalt for modern industry including new energy car.
Keywords: Cobalt; Kinetics; Magnesium Silicate Gel; Removal; Thermodynamics
Document Type: Research Article
Affiliations: 1: Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China 2: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, School of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China 3: Chinese American Chemical Society, Houston, TX, 77054, USA
Publication date: 01 June 2016
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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