稻壳与脱硅稻壳活性炭特性及对有机物吸附

doi:10.3969/j.issn.0253-2417.2014.05.005

林产化学与工业 ›› 2014, Vol. 34 ›› Issue (5): 27-34.doi: 10.3969/j.issn.0253-2417.2014.05.005

稻壳与脱硅稻壳活性炭特性及对有机物吸附

刘斌¹, 顾洁², 邱盼¹, 陆裕聪¹, 周建斌²

1. 南京林业大学化学工程学院, 江苏南京 210037;
2. 南京林业大学材料科学与工程学院, 江苏南京 210037

收稿日期:2014-04-08 出版日期:2014-10-25 发布日期:2015-08-18
作者简介:刘斌（1989-），男，内蒙古呼和浩特人，硕士，研究方向：生物质资源开发利用；E-mail：liubin_nj@163.com
基金资助:
林业公益性行业科研专项项目（201304611）；国家973计划资助项目（2010CB732205）；江苏高校优势学科建设工程资助项目（无编号）

The Adsorption Properties of Rice Husk-based and Silicon-freed Rice Husk-based Activated Carbon on Organic Compounds

LIU Bin¹, GU Jie², QIU Pan¹, LU Yu-cong¹, ZHOU Jian-bin²

1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;
2. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China

Received:2014-04-08 Online:2014-10-25 Published:2015-08-18
Contact: 周建斌，男，教授，博士生导师，主要从事生物质能源及炭材料研究；E-mail：zhoujianbin@njfu.com.cn E-mail:zhoujianbin@njfu.com.cn

摘要/Abstract

摘要： 以稻壳为原料，同时制备脱硅稻壳，采用ZnCl₂-CuCl₂复合活化剂制备活性炭，并对所制备的稻壳活性炭（RAC）与脱硅稻壳活性炭（FAC）的孔结构和表面化学性质进行了分析，而后将其应用于对水中有机物的去除，同时研究了其吸附特性。结果表明：所制得的稻壳活性炭比表面积达到了1 924 m²/g，而稻壳经过脱硅处理制得的活性炭比表面积达到了2 433 m²/g。脱硅稻壳表面具有更多种类的官能团存在。稻壳与脱硅稻壳活性炭在碱性条件下有利于品红的吸附，并且适用于高盐度条件下品红的吸附；在初始pH值为7，初始质量浓度为400 mg/L，投加量为0.8 mg/g时，稻壳活性炭和脱硅稻壳活性炭对有机物的吸附量分别达到439和483 mg/g；吸附等温模型符合Langmuir等温式；吸附动力学以及脱附研究显示稻壳与脱硅稻壳活性炭对品红的吸附过程主要由化学吸附控制。

关键词: 稻壳, 活性炭, 品红, 吸附动力学, 等温吸附

Abstract: The activated carbons were prepared from rice husks and silicon-freed rice husks by composite activator. The difference between rice husk-based activated carbon (RAC) and silicon-freed rice husk based activated carbon (FAC) in pore structure and surface chemistry were analyzed. The synthesized activated carbon was used as adsorbents in water treatment. The adsorption properties, isotherms and kinetics of fuchsine on activated carbons were investigated. The results indicated that the BET surface area of RAC and FAC reached 1 924 and 2 433 m²/g, respectively. There FAC has more functional groups compared with RAC. RAC and FAC could improve the removal efficiency of fuchsine at high pH value. The adsorbents could be used in high salt concentration conditions. When the initial pH 7, initial mass concentration 400 mg/L and the adsorbents dosages 0.8 mg/g were used, the adsorption capacity of RAC and FAC was 439 and 483 mg/g, respectively. The Langmuir isotherm model was found to fit well with the adsorption process of RAC and FAC. Both the kinetics and desorption study indicated that the adsorption process was controlled by chemisorption.

Key words: rice husk, activated carbon, fuchsine, adsorption kinetics, adsorption isotherm

中图分类号:

TQ35
TQ424

刘斌, 顾洁, 邱盼, 陆裕聪, 周建斌. 稻壳与脱硅稻壳活性炭特性及对有机物吸附[J]. 林产化学与工业, 2014, 34(5): 27-34.

LIU Bin, GU Jie, QIU Pan, LU Yu-cong, ZHOU Jian-bin. The Adsorption Properties of Rice Husk-based and Silicon-freed Rice Husk-based Activated Carbon on Organic Compounds[J]. Chemistry and Industry of Forest Products, 2014, 34(5): 27-34.

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稻壳与脱硅稻壳活性炭特性及对有机物吸附

The Adsorption Properties of Rice Husk-based and Silicon-freed Rice Husk-based Activated Carbon on Organic Compounds

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