| 王俊敏,冯涛,胡焱弟,唐然肖.化学通报,2016,79(10):981-985. |
| 玉米芯粉对中性红的吸附脱色研究 |
| Study on the adsorptive property of corncob powder for Netual Red |
| 投稿时间：2016-03-06 修订日期：2016-05-05 |
| DOI： |
| 中文关键词: 玉米芯粉 吸附 阳离子染料 中性红 热力学 |
| 英文关键词:corncob powder adsorption cationic dye kinetics thermodynamics |
| 基金项目:2013年度河北省科技计划项目(项目编号：13211115)资助;河北省大学生创新训练项目资助;河北农业大学中青年骨干教师境外研修项目 |
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| 中文摘要: |
| 本文研究了玉米芯粉对染料的吸附脱色情况，结果表明，玉米芯粉能有效吸附阳离子染料。以阳离子染料中性红为模型，考察了吸附剂用量、溶液浓度、溶液pH值以及温度等对吸附平衡的影响，结果表明玉米芯粉吸附中性红符合拟二级动力学方程；不同温度下，该吸附过程符合Langmuir方程和Freundlich方程，qmax、KF受温度影响小；Dubinin–Radushkevich等温方程拟合结果表明该吸附是以化学吸附为主；热力学参数计算结果表明玉米芯粉吸附中性红是一个熵减的自发放热过程，其他电解质的存在不利于吸附反应的进行。 |
| 英文摘要: |
| The adsorption property of corncob powder for the dyes was studied in the paper, the result showed that the cationic dyes can be effectively adsorbed on corncob powder. The effects of adsorbent dosage, pH value, concentration and temperature of the solution on the adsorption of Netual Red were investigated. The resultant kinetic data was well fitted by the pseudo-second-order kinetics model. At the different temperature, the adsorption process was in accordance with both the Langmiur isotherm mode and the Freundlich isotherm mode, the value of qmax and KF were influenced little by the temperature . The result of Dubinin–Radushkevich isotherm mode showed that the adsorption was mainly a chemical adsorption. The thermodynamics study indicated that the adsorption of Netual Red on the corncob powder was spontaneous and exothermic, and the adsorption process became more favorable at room temperature.The existence of other electrolyte was not conducive to the adsorption.
Keywords corncob powder; adsorption; cationic dye; kinetics; thermodynamics |
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