Synthesis, Characterization, and Utilization of a Lignin-Based Adsorbent for Effective Removal of Azo Dye from Aqueous Solution.,ACS Omega

当前位置： X-MOL 学术 › ACS Omega › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Synthesis, Characterization, and Utilization of a Lignin-Based Adsorbent for Effective Removal of Azo Dye from Aqueous Solution.
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-06 , DOI: 10.1021/acsomega.9b03717
Xianzhi Meng ₁ , Brent Scheidemantle _{2,

3} , Mi Li ₁ , Yun-Yan Wang ₄ , Xianhui Zhao ₅ , Miguel Toro-González ₆ , Priyanka Singh _{2,

3} , Yunqiao Pu ₇ , Charles E Wyman _{2,

3} , Soydan Ozcan _{8,

9} , Charles M Cai _{2,

3} , Arthur J Ragauskas _{1,

4,

7}

Affiliation

Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, Tennessee 37996, United States.
Center of Environmental and Research Technology (CE-CERT), University of California, Riverside, California 92507, United States.
Department of Chemical and Environmental Engineering, Bourns College of Engineering, University of California, Riverside, California 92521, United States.
Department of Forestry, Wildlife, and Fisheries; Center for Renewable Carbon, The University of Tennessee Knoxville, Institute of Agriculture, Knoxville, Tennessee 37996, United States.
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
Isotope and Fuel Cycle Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
Department of Mechanical, Aerospace, Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.
Manufacturing Demonstration Facility, Energy and Transportation Science Division, Oak Ridge National Laboratory, Knoxville, Tennessee 37932, United States.

How to effectively remove toxic dyes from the industrial wastewater using a green low-cost lignocellulose-based adsorbent, such as lignin, has become a topic of great interest but remains quite challenging. In this study, cosolvent-enhanced lignocellulosic fractionation (CELF) pretreatment and Mannich reaction were combined to generate an aminated CELF lignin which is subsequently applied for removal of methylene blue and direct blue (DB) 1 dye from aqueous solution. 31P NMR was used to track the degree of amination, and an orthogonal design was applied to determine the relationship between the extent of amination and reaction parameters. The physicochemical, morphological, and thermal properties of the aminated CELF lignin were characterized to confirm the successful grafting of diethylenetriamine onto the lignin. The aminated CELF lignin proved to be an effective azo dye-adsorbent, demonstrating considerably enhanced dye decolorization, especially toward DB 1 dye (>90%). It had a maximum adsorption capacity of DB 1 dye of 502.7 mg/g, and the kinetic study suggested the adsorption process conformed to a pseudo-second-order kinetic model. The isotherm results also showed that the modified lignin-based adsorbent exhibited monolayer adsorption. The adsorbent properties were mainly attributed to the incorporated amine functionalities as well as the increased specific surface area of the aminated CELF lignin.

中文翻译：

木质素基吸附剂的合成，表征和利用，可从水溶液中有效去除偶氮染料。

如何使用绿色低成本的木质纤维素基吸附剂（如木质素）从工业废水中有效去除有毒染料，已成为人们非常关注的话题，但仍然充满挑战。在这项研究中，将助溶剂增强的木质纤维素分级分离（CELF）预处理和曼尼希反应结合在一起，生成胺化的CELF木质素，然后将其用于从水溶液中去除亚甲基蓝和直接蓝（DB）1染料。使用31 P NMR跟踪胺化程度，并采用正交设计确定胺化程度与反应参数之间的关系。胺化的CELF木质素的物理化学，形态和热学性质经过了表征，证实了将二亚乙基三胺成功接枝到木质素上。胺化的CELF木质素被证明是一种有效的偶氮染料吸附剂，显示出显着增强的染料脱色效果，尤其是对DB 1染料（> 90％）的脱色效果。它对DB 1染料的最大吸附容量为502.7 mg / g，动力学研究表明该吸附过程符合拟二级动力学模型。等温线结果还表明，改性的木质素基吸附剂表现出单层吸附。吸附剂的性能主要归因于胺官能团的结合以及胺化CELF木质素比表面积的增加。动力学研究表明吸附过程符合拟二级动力学模型。等温线结果还表明，改性的木质素基吸附剂表现出单层吸附。吸附剂的性能主要归因于胺官能团的结合以及胺化CELF木质素比表面积的增加。动力学研究表明吸附过程符合拟二级动力学模型。等温线结果还表明，改性的木质素基吸附剂表现出单层吸附。吸附剂的性能主要归因于胺官能团的结合以及胺化CELF木质素比表面积的增加。

更新日期：2020-02-18

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11