| Functionalization of diatomite with glycine and amino silane for formaldehyde removal |
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| 作者姓名： | Yonghao Di Fang Yuan Xiaotian Ning Hongwei Jia Yangyu Liu Xiangwei Zhang Chunquan Li Shuilin Zheng Zhiming Sun |
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| 作者单位： | School of Chemical and Environmental Engineering |
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| 基金项目： | financially supported by the National Training Program of Innovation and Entrepreneurship for Undergraduates(No.C201903678);the Fundamental Research Funds for the Central Universities(2020YJSHH02);Fok Ying Tung Education Foundation,China(No.171042);the Yue Qi Young Scholar Project of the China University of Mining and Technology(Beijing)(No.2017 QN12)。 |
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| 摘 要： | Two amino-functionalized diatomite(DE)composites modified by 3-aminopropyltriethoxysilane(APTS)or glycine(GLY)(i.e.,APTS/DE and GLY/DE)were successfully synthesized via the wet chemical method for the time-and cost-efficient removal of indoor formaldehyde(HCHO).First,the optimal preparation conditions of the two composites were determined,and then their microstructures and morphologies were characterized and analyzed.Batch HCHO adsorption experiments with the two types of amino-modified DE composites were also conducted to compare their adsorption properties.Experimental results indicated that the pseudo-second-order kinetic and Langmuir isotherm models could well describe the adsorption process,and the maximum adsorption capacities of APTS/DE and GLY/DE prepared under optimal conditions at 20°C were 5.83 and 1.14 mg·g-1,respectively.The thermodynamic parameters of the composites indicated that the adsorption process was spontaneous and exothermic.The abundant amine groups grafted on the surface of DE were derived from the Schiff base reaction and were essential for the high-efficient adsorption performance toward HCHO.
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| 关 键 词： | DIATOMITE 3-AMINOPROPYLTRIETHOXYSILANE GLYCINE adsorption FORMALDEHYDE |
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