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3种生物质炭对活性艳蓝KN-R的吸附

Keywords: 玉米秸秆炭,稻壳炭,稻草秸秆炭,吸附,活性艳蓝KN-R

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Abstract:

选择由玉米秸秆、稻壳和稻草秸秆在825℃制成的生物质炭作为吸附剂,通过模拟实验,研究其对溶液中活性艳蓝KN-R的吸附特性,考察了pH值、时间、溶液初始浓度和生物质炭用量对吸附效果的影响。结果表明,当pH为2.0时,玉米秸秆炭和稻壳炭对活性艳蓝的吸附量均达到最大,而pH对稻草秸秆炭的影响不大;三者达到吸附平衡的时间分别为180、300和360min,最大吸附量分别为114.05、54.60和68.19mg/g。等温吸附过程可以用Langmuir方程来描述;动力学实验表明,吸附过程更符合拟二级动力学模型;热力学数据分析发现,吸附过程是自发进行的吸热过程。

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