Highly efficient removal of dibutyl phthalate from wastewater using a novel hydrophilic-lipophilic magnetic adsorbent based on silica-coated iron oxide nanoparticles.

IF 4.6 3区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Sarah Alharthi, Tahira Bibi, Eman Y Santali, Ashraf Ali
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Abstract

The widespread occurrence of dibutyl phthalate (DBP) in aquatic systems demands effective remediation approaches. This study developed a novel magnetic adsorbent (Fe3O4@SiO2-R) through the surface functionalization of silica-coated iron oxide nanoparticles with octadecyl silane and (3-aminopropyl)trimethoxy silane (APTMS) to incorporate both hydrophobic and hydrophilic groups. Comprehensive characterization (SEM, XRD, FTIR, XPS) confirmed the successful synthesis of the adsorbent. Batch adsorption experiments systematically evaluated the DBP removal across different water matrices (river water, municipal and industrial wastewater), examining the effect of concentration, contact time, adsorbent dose, and pH effects. The adsorbent demonstrated exceptional performance with a maximum adsorption capacity of 645.43 mg g-1 and removal efficiencies of 98.4%, 94.2%, and 88.7% in the respective matrices, reducing DBP to <6 μg L-1. The process simultaneously decreased the total organic content (TOC) by 18% and chemical oxygen demand (COD) by 22%, indicating effective co-removal of the organic pollutants. Adsorption followed the Langmuir isotherm (R 2 = 0.994) and pseudo-second-order kinetics, suggesting monolayer chemisorption. Remarkably, after 30 reuse cycles, the removal efficiency decreased by only 20%, demonstrating excellent reusability. Comparative analysis revealed that the adsorbent outperformed many existing materials in terms of adsorption capacity and operational simplicity. These findings highlight Fe3O4@SiO2-R as an efficient adsorbent for plasticizer removal, with significant potential for practical water treatment applications while supporting SDG targets for clean water.

基于二氧化硅包覆氧化铁纳米颗粒的新型亲水亲脂磁性吸附剂对废水中邻苯二甲酸二丁酯的高效去除。
邻苯二甲酸二丁酯(DBP)在水生系统中的广泛存在需要有效的修复方法。本研究通过十八烷基硅烷和(3-氨基丙基)三甲氧基硅烷(APTMS)表面功能化二氧化硅包覆的氧化铁纳米颗粒,开发了一种新型磁性吸附剂(Fe3O4@SiO2-R),以结合疏水性和亲水性基团。综合表征(SEM, XRD, FTIR, XPS)证实了吸附剂的成功合成。批量吸附实验系统地评估了不同水基质(河水、市政和工业废水)对DBP的去除效果,考察了浓度、接触时间、吸附剂剂量和pH值的影响。该吸附剂表现出优异的吸附性能,最大吸附量为645.43 mg g-1,去除效率分别为98.4%、94.2%和88.7%,DBP降至-1。该工艺同时将总有机含量(TOC)降低18%,化学需氧量(COD)降低22%,表明有机污染物的协同去除效果显著。吸附遵循Langmuir等温线(r2 = 0.994)和准二级动力学,表明为单层化学吸附。值得注意的是,在重复使用30次后,去除效率仅下降了20%,表明了良好的可重复使用性。对比分析表明,该吸附剂在吸附能力和操作简单性方面优于许多现有材料。这些发现突出了Fe3O4@SiO2-R作为一种高效的增塑剂去除吸附剂,在支持清洁水的可持续发展目标的同时,具有实际水处理应用的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Nanoscale Advances
Nanoscale Advances Multiple-
CiteScore
8.00
自引率
2.10%
发文量
461
审稿时长
9 weeks
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