CoFe2O4/氧化石墨烯接枝四乙基戊二胺的合成及其对水溶液中Cr (VI)的去除

IF 1.5 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Advances in Condensed Matter Physics Pub Date : 2022-05-13 DOI:10.1155/2022/8961039

H. Pan, Donglin Zhao, Li Wang

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引用次数: 1

摘要

本研究采用简单的一步水热反应制备了氨基功能化磁性石墨烯基复合材料TEPA-GO/CoFe2O4 (TGOM)，并将其应用于废水中Cr (VI)的去除。TGOM脱除Cr (VI)具有脱除效率高、循环性能优异的特点。最大吸附量为114.81 mg/g，循环4次后吸附效率仍可达62%。热重分析表明，TGOM材料中氨基酸的质量百分比约为1.97%。经TEPA改性后，由于与Cr (VI)的螯合协同作用，增加了吸附位点，提高了吸附能力，研究了pH、接触时间和温度对Cr (VI)去除的影响。吸附过程符合拟二级动力学和Langmuir等温线模型，热力学参数表明吸附过程是自发放热的。吸附前后的表征分析表明，在去除过程中存在络合反应、静电吸附和还原机理。上述结果表明，TGOM是一种去除废水中Cr (VI)的有效吸附材料。

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Synthesis of CoFe2O4/Graphene Oxide-Grafted Tetraethylenepentamine for Removal of Cr (VI) from Aqueous Solution

In this study, amino-functionalized magnetic graphene-based composite TEPA-GO/CoFe2O4 (TGOM) was prepared by a simple one-step hydrothermal reaction and applied to the removal of Cr (VI) from wastewater. The removal of Cr (VI) by TGOM has the characteristics of high removal efficiency and excellent cycle performance. The maximum adsorption capacity is 114.81 mg/g, and the adsorption efficiency can still reach 62% after four cycles. The mass percentage of amino in TGOM material is about 1.97% according to thermogravimetric analysis. The modification by TEPA increased the adsorption sites and improved the adsorption capacities due to the synergistic effect of chelation with Cr (VI). The effects of pH, contact time, and temperature on the removal of Cr (VI) were studied. The removal process accorded with the pseudo-second-order kinetics and Langmuir isotherm model, and the thermodynamic parameters showed that the adsorption process was exothermic and spontaneous. The characterization analysis before and after adsorption showed that there were complexation reaction, electrostatic adsorption, and reduction mechanism in the removal process. The above results indicate that TGOM is an effective adsorption material for the removal of Cr (VI) in wastewater.

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来源期刊

Advances in Condensed Matter Physics PHYSICS, CONDENSED MATTER-

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Advances in Condensed Matter Physics publishes articles on the experimental and theoretical study of the physics of materials in solid, liquid, amorphous, and exotic states. Papers consider the quantum, classical, and statistical mechanics of materials; their structure, dynamics, and phase transitions; and their magnetic, electronic, thermal, and optical properties. Submission of original research, and focused review articles, is welcomed from researchers from across the entire condensed matter physics community.