科研之友
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摘要
As one of the toxic dyes, Congo Red (CR) is considered as emerging pollutant in surface water, thus, the development of novel adsorbent for its efficient removal is necessary. Here, ZnO/SiO2 nanosphere composites with rough surfaces were synthesized by a facile wet impregnation method. The structure and morphology of as-prepared composites were characterized and their performances toward CR adsorption were evaluated. The ZnO/SiO2-1 composite exhibited high adsorption capacity of similar to 83 mg/g and fast adsorption kinetic for removal of CR from aqueous solution. The adsorption kinetic and isotherm data could be well interpreted by the Pseudo-second order rate equation and Langmuir adsorption isotherm, respectively. Moreover, the ZnO/SiO2-1 could be easily regenerated by calcination and the adsorption capacity could be maintained at high level (up to 83%) for at least 4 adsorption-regeneration cycles.
- 出版日期2018-1
- 单位中国矿业大学（北京）
