磁性Fe3O4–TGT纳米复合材料的合成、表征及其在去除水溶液中Pb（II）中的应用

IF 0.4 Q4 ENVIRONMENTAL SCIENCES

Asian Journal of Water, Environment and Pollution Pub Date : 2023-01-23 DOI:10.3233/ajw230011

J. Anuradha, N. Muthulakshmi Andal

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引用次数: 0

摘要

磁吸附分离（MAS）法是一种理想的环境净化方法。嵌入天然垃圾材料的磁性材料是一种简单的途径，可以在较低的剂量、接触时间和增加负载金属的吸附剂从水性基质中回收的机会下实现最大的吸附能力。在本研究中，讨论了用自燃法合成Fe3O4–TGT复合材料（TGT-C2）及其在去除水溶液中Pb（II）方面的应用。利用VSM（振动样品磁强计）、SEM（扫描电子显微镜）、粒度分析仪、EDAX（能量分散X射线光谱仪）和FTIR（傅立叶变换红外分光光度计）技术对TGT-C2进行了表征。TGT-C2在本质上是磁性的，其饱和磁化强度（Ms）/矫顽力（Hc）值分别计算为1.54 emu g-1/139.83G，小于裸露的Fe3O4。在100mg/L初始金属离子浓度、10分钟搅拌时间、50mg剂量和pH 5环境的优化条件下，合成的纳米复合材料记录了最大98%的Pb（II）离子螯合。进行等温验证、吸附动力学和连续解吸/再生循环。研究结果支持了从动物粪便中制备生物纳米复合材料在有效捕获二价金属离子方面的成功。

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Synthesis, Characterisation and Utilisation of Magnetic Fe3O4 – TGT Nanocomposite in the Removal of Pb(II) from Aqueous Solutions

Magnetic Adsorption Separation (MAS) method is an ideal substitute for the environmental clean-up process. Magnetic material embedded with natural litter material is a facile route to achieve maximum adsorptive ability at a lower dosage, contact time and increased chance of metal-laden adsorbents’ recovery from aqueous matrices. In the present study, the synthesis of Fe3O4–TGT composite (TGT- C2) by the auto combustion method and its employment for Pb(II) removal from aqueous solutions is discussed. TGT- C2 is characterised using VSM (Vibrating Sample Magnetometer), SEM (Scanning Electron Microscope), Particle Size Analyzer, EDAX (Energy Dispersive X-ray Spectrometer) and FTIR (Fourier Transform Infra Red Spectrophotometer) techniques. TGT- C2 is found to be magnetic in nature and their saturation magnetization (Ms)/ Coercivity (Hc) values are calculated as 1.54 emu g-1/139.83 G, respectively, being less than bare Fe3O4. The synthesised nanocomposite registered a maximum of 98% sequestration of Pb(II) ions under the optimised conditions of 100 mg/L initial metal ion concentration, 10 min agitation time, 50 mg dosage and pH 5 environment. Isothermal verification, the kinetics of adsorption and successive desorption/ regeneration cycles were performed. The outcomes support the preparation of bio-nanocomposites from animal waste was successful in the efficient trapping of divalent metal ions.

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来源期刊

Asian Journal of Water, Environment and Pollution ENVIRONMENTAL SCIENCES-

CiteScore

1.00

自引率

20.00%

发文量

期刊介绍： Asia, as a whole region, faces severe stress on water availability, primarily due to high population density. Many regions of the continent face severe problems of water pollution on local as well as regional scale and these have to be tackled with a pan-Asian approach. However, the available literature on the subject is generally based on research done in Europe and North America. Therefore, there is an urgent and strong need for an Asian journal with its focus on the region and wherein the region specific problems are addressed in an intelligent manner. In Asia, besides water, there are several other issues related to environment, such as; global warming and its impact; intense land/use and shifting pattern of agriculture; issues related to fertilizer applications and pesticide residues in soil and water; and solid and liquid waste management particularly in industrial and urban areas. Asia is also a region with intense mining activities whereby serious environmental problems related to land/use, loss of top soil, water pollution and acid mine drainage are faced by various communities. Essentially, Asians are confronted with environmental problems on many fronts. Many pressing issues in the region interlink various aspects of environmental problems faced by population in this densely habited region in the world. Pollution is one such serious issue for many countries since there are many transnational water bodies that spread the pollutants across the entire region. Water, environment and pollution together constitute a three axial problem that all concerned people in the region would like to focus on.