期刊论文

中文

江苏农业学报

1000-4440

2016

32

2

467-471

10.3969/j.issn.1000-4440.2016.02.035

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）；

本校为第一机构

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。

Citric acid modified rice straw was used as biosorbent for methylene blue（ MB） aqueous solution to inves-tigate its adsorption properties. The factors affecting adsorption behavior such as contact time, temperature, initial concen-tration of MB and sorbent dosage were examined, and the adsorption isothermal adsorption models were studied. The adsorp-tion 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...