Materials Reports  2019, Vol. 33 Issue (z1): 136-140 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on the Adsorption Properties of Sodium Alginate-Hydrated Manganese Dioxide Functional Spheres for Cu(Ⅱ) |
| LIU Shan+, FENG Ting+, TIAN Xincheng, LIU Danrong, ZHANG Yue, LI Yuliang
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| Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, College of Environmental Science and Engineering, Chang’an University, Xi’an 710054 |
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Abstract Using sodium alginate (SA)and hydrated manganese dioxide(HMO) as materials, the alginate loaded manganese dioxide (SA-HMO) functional spheres (2.9—3.1 mm) were prepared by sol-gel process by embedding method. The effects of pH, initial adsorption concentration, adsorption time and temperature on the adsorption process were studied. The experimental results show that adsorption of Cu(Ⅱ) by SA-HMO functional sphere, the optimum adsorption pH was 5.5. The adsorption process of Cu(Ⅱ) reached equilibrium at 14 h, and the saturated adsorption capacity of functional spheres for Cu(Ⅱ) was 360 mg/g, the adsorption process is spontaneous, endothermic and entropy-increasing. The adsorption isotherm fitting results show that the adsorption behavior of SA-HMO to Cu(Ⅱ) is more in line with the Freundlich isotherm adsorption equation, indicating that the adsorption process may involve both the single-layer adsorption process and the multi-layer adsorption process. Pseudo-first-order and quasi-second-order kinetics models show that physical and chemical interactions are involved in the adsorption process.
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Published: 05 July 2019
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| About author:: Shan Liu, born in Xi’an, Shaanxi Province, is an associate professor and master’s supervisor of Chang’an University. She is mainly engaged in water pollution control technology research and environmental impact assessment.Ting Feng from Yan’an, Shaanxi Province, is a postgraduate student of Chang’an University. She is an associate professor of Shan Liu and is engaged in water pollution control research. |
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