Efficient removal of toxic Cr(VI) ions from waste streams by a novel Fe3O4 @formaldhyde urea resin composites

Sustainable Chemistry One World Pub Date : 2025-01-10 DOI:10.1016/j.scowo.2025.100045

Jayshri S. Jadhao , Nilesh V. Rathod (Dr., Assistant Professor) , Ankita Rao , Chandrakant D. Ghugare , Santosh M. Chavan , Akash V. Kubade , Parikshit S. Thakare , Arun B. Patil (Dr., Professor)

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Abstract

The widespread release of harmful heavy metals is becoming one of the most pressing environmental concerns because of the havoc it wreaks on human health. Chromium (VI) is a prevalent hazardous heavy metal ion found in industrial wastewater, significantly affecting the environment. This research details the fabrication and examination of an innovative Fe₃O₄-Formaldehyde-Urea resin (Fe₃O₄@FUR) for the effective removal of hexavalent chromium (Cr(VI)) from water-based solutions. Fe₃O₄@Formaldehyde Urea Resin presents a highly original and green chemistry approach by combining the magnetic properties of Fe₃O₄ with a less-toxic resin matrix, enabling numerous sustainable applications in environmental remediation. The Fe₃O₄@FUR exhibited a high maximum adsorption capacity (qmax) of 79.6 mg/g at pH 1. Kinetic results demonstrated that Cr(VI) adsorption on Fe₃O₄@FUR followed a pseudo-second-order model. Several characterization methods, including particle size analysis, infrared spectroscopy, scanning electron microscopy, TG-DSC, and XRD, proved that the Fe₃O₄ nanoparticles were successfully integrated into the formaldehyde-urea resin matrix. The stability and reusability of Fe₃O₄@FUR were evaluated by four rounds of regeneration testing. The proposed method is reliable for Cr(VI) sorption in pond, dam, and river water samples.

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新型Fe3O4 @甲醛脲树脂复合材料对废水中有毒Cr（VI）离子的高效去除

有害重金属的广泛释放正成为最紧迫的环境问题之一，因为它对人类健康造成了严重破坏。铬（VI）是工业废水中普遍存在的有害重金属离子，对环境有重大影响。本研究详细介绍了一种新型Fe₃O₄-甲醛-尿素树脂（Fe3O4@FUR）的制备和检验，该树脂可以有效地从水基溶液中去除六价铬（Cr(VI)）。Fe₃O₄@甲醛脲树脂通过将Fe₃O₄的磁性与毒性较小的树脂基体相结合，提出了一种高度原创和绿色的化学方法，使其在环境修复中得到了许多可持续的应用。在pH为1时，Fe3O4@FUR的最大吸附量（qmax）为79.6 mg/g。动力学结果表明，Fe3O4@FUR对Cr（VI）的吸附符合准二阶模型。通过粒度分析、红外光谱、扫描电镜、TG-DSC和XRD等表征方法，证明了硫酸铁纳米颗粒成功集成到甲醛-尿素树脂基体中。通过四轮再生测试对Fe3O4@FUR的稳定性和可重用性进行了评价。该方法对池塘、水坝和河流水样中Cr（VI）的吸附是可靠的。

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Sustainable Chemistry One World

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