Facile synthesis and highly efficient selective adsorption properties of Y_2Mo_4O_(15) for methylene blue: Kinetics, thermodynamics and mechanical analyses
查看参考文献30篇
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文摘
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Y_2Mo_4O_(15) particles were prepared using a simple solution method (SSM) and used as a highly efficient selective adsorbent for methylene blue (MB) in aqueous solutions. The maximum adsorption capacity of the samples was determined based on the adsorption isotherms with different adsorbent doses at 298, 318 and 338 K. The fittings of the temperature-dependent isotherms yield ∆_r_m~θ = -34.1 kJ/mol, ∆_H_m~θ = -36.9 kJ/mol and ∆_S_m~θ = -9.67 J/mol·K. The as-prepared Y_2Mo_4O_(15) has a very large maximum adsorption capacity (i.e., 198 mg/g) for MB at room temperature, and this value is only less than that of amorphous hardwood powder. Notably, 80 mg of adsorbent is able to completely decolorize 250 mL of 30 mg/L MB aqueous solution. The kinetic parameters of the adsorption process were obtained from the temperature-dependent adsorption isotherm (i.e., E_1 = 26.9 kJ/mol and E_(-1) = 63.8 kJ/mol). The results of adsorption kinetics show that it is a pseudo-second-order reaction. The mechanism of the high selectivity and the large adsorption capacity is discussed based on competitive ion (CI) experiments and coordination theory. |
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来源
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Journal of Rare Earths
,2018,36(8):844-850 【核心库】
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DOI
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10.1016/j.jre.2018.03.013
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关键词
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Y_2Mo_4O_(15)
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Adsorption
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Methylene blue (MB)
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Simple solution method (SSM)
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Rare earths
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地址
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1.
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870
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School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004
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Key Laboratory of Nano-Materials and Photoelectric Catalysis of Qinhuangdao, Key Laboratory of Nano-Materials and Photoelectric Catalysis of Qinhuangdao, Qinhuangdao, 066004
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1002-0721 |
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学科
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化学;行业污染、废物处理与综合利用 |
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基金
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Project supported by the Fundamental Research Funds for the Central Universities
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the Basic Key Program of Applied Basic Research of Science and Technology Commission Foundation of Hebei Province in China
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辽宁省自然科学基金
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the Hebei Province Higher Education Research Project
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Northeastern University at Qinhuangdao Campus Research Fund
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文献收藏号
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CSCD:6308002
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