酚化碱木素/磁铁矿复合材料作为废水中甲基紫 6B 的吸附剂

Q3 Environmental Science
Mary Sheenalyn P. Rodil, Corazon D. Sacdalan, Rissabell R. Robero, Maria Evytha L. Salinas, Trixie N. Santander
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引用次数: 0

摘要

废水中的甲基紫 6B(MV6B)会对水生生态系统和人类健康造成危害,因此必须立即去除。为此,本研究率先开发了一种染料吸附剂,将酚碱木素(PAL)加入磁铁矿(Fe3O4)中,为去除 MV6B 提供了一种解决方案。木质素是通过碱提取法从椰子壳中提取的,使用苯酚化法对其进行化学改性,然后整合到磁铁矿表面。利用扫描电镜和傅立叶变换红外光谱对吸附剂进行了表征,并对各种参数进行了优化,同时对吸附动力学和等温线模型以及吸附剂的可重复使用性进行了评估。根据表征结果,PAL 成功地沉积在磁铁矿上。实验结果表明,使用 PAL/Fe3O4 复合材料去除 MV6B 的最佳条件是 pH 值为 4、温度为 313 K、每 15 mL MV6B 的 PAL/Fe3O4 用量为 0.10 g、接触时间为 150 分钟。MV6B 的平衡去除率为 95.1%,平衡时的吸附容量为 6.42 毫克/克。MV6B 的吸附遵循伪二阶动力学模型和 Freundlich 等温线模型。热力学研究表明,吸附过程是自发和放热的。PAL/Fe3O4 经过三次循环后,无需解吸即可重复使用。因此,这项研究表明,PAL/Fe3O4 吸附剂在废水处理方面是实用、经济和高效的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Phenolated Alkali Lignin/Magnetite Composite as an Adsorbent for Methyl Violet 6B in Wastewater
Methyl violet 6B (MV6B), found in wastewater, poses hazardous effects to aquatic ecosystems and human health; therefore, it must be removed immediately. In response, this study pioneered the development of a dye adsorbent by incorporating phenolated alkali lignin (PAL) into magnetite (Fe3O4), offering a solution for MV6B removal. Lignin was extracted from coconut husk through alkali extraction, chemically modified using phenolation, and integrated onto the magnetite surface. SEM and FTIR spectroscopy were used to characterize the adsorbent, and various parameters were optimized, along with evaluations of the adsorption kinetics and isotherm models, as well as the adsorbent’s reusability. PAL was successfully deposited onto the magnetite based on the characterization. The experimental results revealed that the optimal conditions for the removal of MV6B using PAL/Fe3O4 composite are pH 4, a temperature of 313 K, a dosage of 0.10 g PAL/Fe3O4 per 15 mL of MV6B, and a contact time of 150 minutes. MV6B’s equilibrium removal rate was 95.1%, with an adsorption capacity at equilibrium of 6.42 mg/g. The adsorption of MV6B followed a pseudo-second-order kinetic model and the Freundlich model isotherm. A thermodynamic study showed that the adsorption process was spontaneous and exothermic. PAL/Fe3O4 was highly reusable after three cycles without the need for desorption. Hence, this study has demonstrated that the PAL/ Fe3O4 adsorbent is practical, economical, and efficient for wastewater treatment.
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来源期刊
Environment and Natural Resources Journal
Environment and Natural Resources Journal Environmental Science-Environmental Science (all)
CiteScore
1.90
自引率
0.00%
发文量
49
审稿时长
8 weeks
期刊介绍: The Environment and Natural Resources Journal is a peer-reviewed journal, which provides insight scientific knowledge into the diverse dimensions of integrated environmental and natural resource management. The journal aims to provide a platform for exchange and distribution of the knowledge and cutting-edge research in the fields of environmental science and natural resource management to academicians, scientists and researchers. The journal accepts a varied array of manuscripts on all aspects of environmental science and natural resource management. The journal scope covers the integration of multidisciplinary sciences for prevention, control, treatment, environmental clean-up and restoration. The study of the existing or emerging problems of environment and natural resources in the region of Southeast Asia and the creation of novel knowledge and/or recommendations of mitigation measures for sustainable development policies are emphasized. The subject areas are diverse, but specific topics of interest include: -Biodiversity -Climate change -Detection and monitoring of polluted sources e.g., industry, mining -Disaster e.g., forest fire, flooding, earthquake, tsunami, or tidal wave -Ecological/Environmental modelling -Emerging contaminants/hazardous wastes investigation and remediation -Environmental dynamics e.g., coastal erosion, sea level rise -Environmental assessment tools, policy and management e.g., GIS, remote sensing, Environmental -Management System (EMS) -Environmental pollution and other novel solutions to pollution -Remediation technology of contaminated environments -Transboundary pollution -Waste and wastewater treatments and disposal technology
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