[1]滕 涛,易 诚,刘宁辉.改性稻草秸秆对亚甲基蓝的生物吸附性能及其热力学分析[J].江苏农业学报,2016,(02):467-471.[doi:10.3969/j.issn.1000-4440.2016.02.035]
　TENG Tao,YI Cheng,LIU Ning-hui.Adsorption of mythylene blue on rice straw and its thermodynamics characteristics[J].,2016,(02):467-471.[doi:10.3969/j.issn.1000-4440.2016.02.035]
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改性稻草秸秆对亚甲基蓝的生物吸附性能及其热力学分析()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2016年02期
页码:
467-471
栏目:
加工贮藏·质量安全
出版日期:
2016-03-20

文章信息/Info

Title:
Adsorption of mythylene blue on rice straw and its thermodynamics characteristics
作者:
滕 涛;  易 诚;  刘宁辉
衡阳师范学院生命科学与环境学院,湖南 衡阳 421008
Author(s):
TENG Tao;  YI Cheng;  LIU Ning-hui
College of Life Science and Environment, Hengyang Normal University, Hengyang 421008, China
关键词:
稻草秸秆;  柠檬酸改性;  生物吸附剂;  亚甲基蓝;  热力学
Keywords:
rice straw;  citric acid modification;  biosorbent;  methylene blue;  thermodynamics
分类号:
X522; X712
DOI:
10.3969/j.issn.1000-4440.2016.02.035
文献标志码:
A
摘要:
采用柠檬酸改性稻草秸秆作为生物吸附剂,探讨了吸附时间、温度、亚甲基蓝初始浓度和吸附剂投加量对亚甲基蓝吸附效果的影响,并对其等温吸附特性、吸附热力学进行了系统的探讨。结果表明:在50 ml亚甲基蓝初始浓度为0.01 g/L染料溶液中,加入0.2 g改性稻草秸秆,25 ℃下振荡30 min,吸附率达到99.08%,且吸附平衡符合Langmuir模型和Freundlich模型,相关系数均达到98%以上。热力学计算结果显示,改性稻草秸秆对亚甲基蓝的吸附属自发的放热过程。上述结果表明,柠檬酸改性稻草秸秆作为一种能够有效去除印染废水中亚甲基蓝的生物吸附剂具有较高的潜在价值。
Abstract:
Citric acid modified rice straw was used as biosorbent for methylene blue(MB)aqueous solution to investigate its adsorption properties. The factors affecting adsorption behavior such as contact time, temperature, initial concentration of MB and sorbent dosage were examined, and the adsorption isothermal adsorption models were studied. The adsorption rate of MB with initial concentration of 0.01 g/L reached 99.08% after 0.2 g citric acid-modified rice straw was added and shaken for 30 min. The isothermal adsorption was well fit by both Langmuir model and Freundlich model(R2>0.980 0). Thermodynamics analysis revealed that the adsorption was spontaneous and exothermic. It is suggested that citric acid modified rice straw could be an candidate biosorbent in the removal of MB from dyeing wastewater.

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备注/Memo

备注/Memo:
收稿日期:2015-07-31 基金项目:湖南省自然科学基金项目(2015JJ2018); 衡阳师范学院基金青年项目(14A03); 衡阳师范学院2015年度大学生研究性学习和创新性实验计划项目(cx1523) 作者简介:滕 涛(1982-),男,湖南衡阳人,硕士,讲师,主要从事生物资源开发利用研究。(Tel)15211889462;(E-mail)dreamer0734@163.com
更新日期/Last Update: 2016-03-20