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基于棉模板的分级结构氧化镁的合成及其对油田废水的高效处理吸附性能

Synthesis of hierarchical MgO based on a cotton template and its adsorption properties for efficient treatment of oilfield wastewater.

作者信息

Tang Ying, Li Zhaoyi, Xu Zhongying, Zhang Jie, Qu Chengtun, Zhang Zhifang

机构信息

College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an Shaanxi 710065 China

State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology Beijing 102206 China.

出版信息

RSC Adv. 2020 Aug 4;10(48):28695-28704. doi: 10.1039/d0ra04181e. eCollection 2020 Aug 3.

DOI:10.1039/d0ra04181e
PMID:35520079
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9055877/
Abstract

A biomorphic MgO nanomaterial was fabricated a facile and low-cost immersion method using cotton as the template. The obtained materials were characterized X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and N adsorption-desorption analysis. The as-prepared MgO retained the structure of cotton, with a porous hierarchical structure and a high specific surface area, which endowed it with great potential due to its excellent adsorption properties for the adsorption of additives in oil field wastewater. It also exhibited the maximum adsorption capacity of 391.36 mg g for sulfonated lignite. The adsorption process of sulfonated lignite on biomorphic MgO was systematically investigated and was found to obey the pseudo-second-order rate equation and the Langmuir adsorption model. The negative values of Gibbs free energy change (Δ) showed that the adsorption process was feasible and spontaneous. The endothermic process was depicted with a positive value for Δ.

摘要

采用简便且低成本的浸渍法，以棉花为模板制备了一种生物形态的氧化镁纳米材料。通过X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和N吸附-脱附分析对所得材料进行了表征。所制备的氧化镁保留了棉花的结构，具有多孔分级结构和高比表面积，由于其对油田废水中添加剂具有优异的吸附性能，因而具有巨大的潜力。它对磺化褐煤的最大吸附容量也达到了391.36 mg/g。系统研究了磺化褐煤在生物形态氧化镁上的吸附过程，发现其符合准二级速率方程和朗缪尔吸附模型。吉布斯自由能变化（Δ）的负值表明吸附过程是可行的且是自发的。正值的Δ描述了该吸热过程。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/87aa7e2d2bd4/d0ra04181e-f20.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/cf40d079fba6/d0ra04181e-f18.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/2cfad58a6d45/d0ra04181e-f19.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/87aa7e2d2bd4/d0ra04181e-f20.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/cc37073183fb/d0ra04181e-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/91cd5e20f3a7/d0ra04181e-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/7e64cefae6be/d0ra04181e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/e725d91d0968/d0ra04181e-f17.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/cf40d079fba6/d0ra04181e-f18.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/2cfad58a6d45/d0ra04181e-f19.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3cff/9055877/87aa7e2d2bd4/d0ra04181e-f20.jpg

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