微波活化稻壳基生物质材料对亚甲基蓝的吸附性能

doi:10.12034/j.issn.1009-606X.218125

过程工程学报 ›› 2018, Vol. 18 ›› Issue (6): 1210-1218.DOI: 10.12034/j.issn.1009-606X.218125

微波活化稻壳基生物质材料对亚甲基蓝的吸附性能

钟倩倩^1*，赵雅琴²，吴爱兵¹，王磊³，沈丽¹，王鹏¹

1. 唐山学院环境与化学工程系，河北唐山 063000 2. 中国矿业大学环境与测绘学院，江苏徐州 221116 3. 唐山师范学院化学系，河北唐山 063000

收稿日期:2018-02-01 修回日期:2018-04-11 出版日期:2018-12-22 发布日期:2018-12-19
通讯作者: 王鹏 1223686550@qq.com
基金资助:
国家自然科学基金青年基金

Adsorptive properties of methylene blue using biomass material based on rice husks by microwave-assisted activation

Qianqian ZHONG^1*, Yaqin ZHAO², Aibing WU¹, Lei WANG³, Li SHEN¹, Peng WANG¹

1. Department of Environmental and Chemical Engineering, Tangshan University, Tangshan, Hebei 063000, China 2. China University of Mining and Technology, School of Environment Science and Spatial Informatics, Xuzhou, Jiangsu 221116, China 3. Department of Chemistry, Tangshan Normal University, Tangshan, Hebei 063000, China

Received:2018-02-01 Revised:2018-04-11 Online:2018-12-22 Published:2018-12-19
Contact: peng wang 1223686550@qq.com

摘要/Abstract

摘要： 以KOH为活化剂，采用微波活化法处理农业废稻壳，制备生物质吸附材料，通过静态吸附实验考察了其对阳离子染料亚甲基蓝的吸附性能. 结果表明，所制生物质材料对亚甲基蓝的最大吸附量为109.9 mg/g，吸附过程符合伪二级动力学方程和Langmuir等温吸附模式，为快速吸附和单分子层吸附，膜扩散是速率控制步骤，吸附过程为生物质材料孔道内部物理吸附和O?H官能团吸附的共同作用.

关键词: 生物质, 微波活化, 吸附, 亚甲基蓝

Abstract: Microwave assisted KOH activation has been utilized for preparation of biomass adsorption material based on agricultural waste rice husks (RH). Batch experiments were conducted to evaluate the sorption performance of cationic dye methylene blue (MB) by modified rice husks (MRH) from aqueous solutions. The effects of solution initial pH, dosage of the adsorbents, salt concentration, the dyeing and finishing auxiliary concentration, contact time and temperature on MB adsorption were investigated. The results showed that MRH had a wide appropriate pH range of 5?11 for MB adsorption, which showed the potential applicability in the actual water body. With NaCl concentration increasing from 0 to 0.2 mol/L, the removal efficiency of MB decreased from 58.24% to 1.86%; while, MB removal increasesd with increasing SDBS concentration. The sorption process for MB onto MRH was an endothermic reaction and the adsorption process reached equilibrium within 30?45 min. The obtained product MRH had a maximum MB adsorption capacity of 109.9 mg/g. The experimental kinetic data were well described by the pseudo-second order model and the best ?tting for MB experimental equilibrium data was achieved with the Langmuir isotherm, which was a rapid and monolayer adsorption process. Film diffusion was the rate-limiting step which was primarily responsible for the adsorption of MB on MRH. Physical adsorption inside the pores of biomass materials and O?H functional groups adsorption both contributed to the adsorption mechanism.

Key words: Biomass, Microwave Activation, Adsorption, Methylene Blue

钟倩倩赵雅琴吴爱兵王磊沈丽王鹏. 微波活化稻壳基生物质材料对亚甲基蓝的吸附性能[J]. 过程工程学报, 2018, 18(6): 1210-1218.

Qianqian ZHONG Yaqin ZHAO Aibing WU Lei WANG Li SHEN Peng WANG. Adsorptive properties of methylene blue using biomass material based on rice husks by microwave-assisted activation[J]. Chin. J. Process Eng., 2018, 18(6): 1210-1218.

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微波活化稻壳基生物质材料对亚甲基蓝的吸附性能

Adsorptive properties of methylene blue using biomass material based on rice husks by microwave-assisted activation

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