大型绿藻石莼对亚甲基蓝的吸附特性  

Biosorption of methylene blue by green macroalgae Ulva lactuca

作　　者：刘青 蒋雪蕾 沈俊杰 周晓见 LIU Qing;JIANG Xuelei;SHEN Junjie;ZHOU Xiaojian(Marine Science and Technology Institute,School of Environmental Science and Engineering,Yangzhou University,Yangzhou 225127,China)

机构地区：[1]扬州大学环境科学与工程学院海洋科学与技术研究所,江苏扬州225127

出　　处：《扬州大学学报（自然科学版）》2020年第6期53-58,共6页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省科技厅自然科学基金资助项目(BK20180940);中国科学院海洋生态与环境科学重点实验室开放基金资助项目(KLMEES201802);广西北部湾海洋灾害研究重点实验室开放基金资助项目(2020KF03)。

摘　　要：为实现大型绿藻石莼的资源化利用,在实验室条件下探究石莼对亚甲基蓝的最佳吸附条件及吸附机理.结果表明,质量浓度为0.2 g·L^(-1)的石莼在振荡速率150 r·min^(-1)、NaCl质量浓度0 g·L^(-1)、温度25℃下对亚甲基蓝的吸附效果最佳,吸附1 d后石莼的最大饱和吸附容量为714.29 mg·g^(-1).准二级动力学可以更好地反映石莼对亚甲基蓝的吸附过程,且石莼对亚甲基蓝的吸附符合Langmuir模型.红外光谱分析结果表明石莼对亚甲基蓝的吸附主要由表面的羟基、羧基以及氨基官能团参与..In order to realize resource utilization of green macroalgae,Ulva lactuca is used as a biological adsorbent to investigate the adsorption characteristicand mechanism for methylene blue in controlled laboratory experiments.The results show that Ulva lactuca exhibits the optimum adsorption abilitywith the maximum adsorption capacity of 714.29 mg·g^(-1)under the biosorbent concentration of 0.2 g·L^(-1),shaking rate of150 r·min^(-1),sodium chloride concentration of 0 g·L^(-1),temperature of 25℃and the adsorption time of 1 d.The pseudo second-orderkinetic model is the best to describe this biosorption process,and the adsorption of methylene blue by Ulva lactuca is consistent with Langmuir model.In addition,FTIR revealed that some surface functional groups of Ulva lactuca such as hydroxyl,carboxyl and amino are involved in theadsorption.

关 键 词：石莼 生物吸附剂 亚甲基蓝 

分 类 号：TQ09[化学工程]