Performance evaluation of aminated multi-walled carbon nanotubes incorporated with green synthesized iron nanoparticles for toxic dyes sequestration from textile wastewater

IF 4.5 3区工程技术 Q1 WATER RESOURCES

Water Resources and Industry Pub Date : 2025-04-29 DOI:10.1016/j.wri.2025.100291

Titus Chinedu Egbosiuba , Cynthia Chukwuemeka , Jonah Chukwudi Umeuzuegbu , Nwanneka Chibuzo Mmonwuba , Ugochukwu Ewuzie , Monday Uchenna Okoronkwo , Valentine Chikaodili Anadebe , Saheed Mustapha , Ambali Saka Abdulkareem , Jimoh Oladejo Tijani , Ashish Patel , Virendra Kumar Yadav

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Abstract

This study evaluates the performance of aminated multi-walled carbon nanotubes (AM-MWCNTs) integrated with zerovalent iron nanoparticles (ZVI) synthesized using cashew leaf (Anacardium occidentale) extract (AM-MWCNTs@ZVI) for the removal of Congo Red (CR) and Methylene Blue (MB) dyes from textile industrial wastewater. The nanocomposite was characterized using FTIR, XRD, BET, HRSEM, and HRTEM analyses, confirming its functional groups, crystalline structure, and enhanced surface area of 1050.4 m²/g. The ecological risk degree of the textile pollutants was assessed to determine the percentage concentrations of crystal violet, Congo red, methyl orange, methylene blue and rhodamine B. Batch adsorption experiments identified optimal parameters as pH 4 for CR and pH 8 for MB, contact time of 60 min, adsorbent dosage of 40 mg/L, and temperature of 40 °C. The Temkin isotherm model best described the adsorption process. Particularly, the maximum adsorption capacities of 450 mg/g and 422 mg/g were evaluated for CR and MB, respectively. Pseudo-second-order kinetics indicated chemisorption as the dominant mechanism. The nanocomposite demonstrated reusability with 88 % and 85 % removal efficiency for CR and MB, respectively, after six cycles. These results highlight AM-MWCNTs@ZVI as an effective, recyclable adsorbent for industrial wastewater treatment.

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胺化多壁碳纳米管配以绿色合成纳米铁对纺织废水中有毒染料的吸附性能评价

本研究评估了用腰果叶提取物（AM-MWCNTs@ZVI）合成的氨基化多壁碳纳米管（AM-MWCNTs）与零价铁纳米颗粒（ZVI）结合去除纺织工业废水中的刚果红（CR）和亚甲基蓝（MB）染料的性能。采用FTIR、XRD、BET、HRSEM和HRTEM等手段对复合材料进行了表征，证实了复合材料的官能团、晶体结构和增强的比表面积为1050.4 m2/g。对纺织污染物的生态风险程度进行评价，确定了结晶紫、刚果红、甲基橙、亚甲基蓝和罗丹明b的百分比浓度。批吸附实验确定了CR的pH为4，MB的pH为8，接触时间为60 min，吸附剂用量为40 mg/L，温度为40℃。Temkin等温模型最能描述吸附过程。其中CR和MB的最大吸附量分别为450 mg/g和422 mg/g。拟二级动力学表明化学吸附是主要机理。经过6次循环后，纳米复合材料对CR和MB的去除率分别为88%和85%，具有可重复使用性。这些结果强调AM-MWCNTs@ZVI是一种有效的、可回收的工业废水处理吸附剂。

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来源期刊

Water Resources and Industry Social Sciences-Geography, Planning and Development

CiteScore

8.10

自引率

5.90%

发文量

审稿时长

75 days

期刊介绍： Water Resources and Industry moves research to innovation by focusing on the role industry plays in the exploitation, management and treatment of water resources. Different industries use radically different water resources in their production processes, while they produce, treat and dispose a wide variety of wastewater qualities. Depending on the geographical location of the facilities, the impact on the local resources will vary, pre-empting the applicability of one single approach. The aims and scope of the journal include: -Industrial water footprint assessment - an evaluation of tools and methodologies -What constitutes good corporate governance and policy and how to evaluate water-related risk -What constitutes good stakeholder collaboration and engagement -New technologies enabling companies to better manage water resources -Integration of water and energy and of water treatment and production processes in industry