Exploring Cu-oxide and Mn-oxide impregnated biochar nanocomposites for sustainable chromium removal from water: Reusability and kinetic studies

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL Chemical Engineering Science Pub Date : 2025-02-21 DOI:10.1016/j.ces.2025.121410

Rizwan Tariq , Muhammad Imran , Muhammad Nadeem , Behzad Murtaza , Jibran Iqbal , Noor Samad Shah , Muhammad Amjad , Sajjad Ahmad , Łukasz Cichocki

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Abstract

The present study aims to evaluate the potential of Sesbania bispinosa biochar (SBBC) and its nanocomposites, SBBC/Mn-oxide, SBBC/Cu-oxide and SBBC/Mn-oxide/Cu-oxide for Cr removal from contaminated water. Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and point of zero charge (PZC) were employed. Impact of initial Cr concentration (25–200 mg/L), pH levels (2–8), adsorbent dose (1–3 g/L), contact time (15–180 min), and coexisting ions in water were investigated. The highest Cr adsorption (75 mg/g) was achieved with triple nanocomposite (SBBC/Mn-oxide/Cu-oxide), followed by dual SBBC/Cu-oxide (59.65 mg/g), SBBC/Mn-oxide (44.9 mg/g) composites, and SBBC alone (37.4 mg/g). The coexisting ions showed a decline in Cr removal. Reusability results revealed a slightly lower Cr removal (8 %) with SBBC/Mn-oxide/Cu-oxide nanocomposite in the fifth cycle. The experimental adsorption data were well-explained through Freundlich and pseudo-second-order kinetic models. It is concluded that nanoparticle-biochar composites are effective for remediating Cr-contaminated water.

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探索Cu-oxide和Mn-oxide浸渍生物炭纳米复合材料对水中铬的可持续去除：可重用性和动力学研究

本研究旨在评价双叶田菁生物炭（SBBC）及其纳米复合材料SBBC/ mn -氧化物、SBBC/ cu -氧化物和SBBC/ mn -氧化物/ cu -氧化物去除污染水中铬的潜力。采用傅里叶变换红外光谱（FTIR）、扫描电镜（SEM）、能量色散x射线光谱（EDX）和零电荷点（PZC）等方法进行了研究。考察了Cr初始浓度（25 ~ 200 mg/L）、pH值（2 ~ 8）、吸附剂剂量（1 ~ 3 g/L）、接触时间（15 ~ 180 min）和水中共存离子的影响。三层纳米复合材料（SBBC/Mn-oxide/Cu-oxide）对Cr的吸附量最高（75 mg/g），其次是双层SBBC/Cu-oxide（59.65 mg/g）、SBBC/Mn-oxide（44.9 mg/g）复合材料和单独SBBC（37.4 mg/g）。共存离子对铬的去除率下降。重复使用结果表明，SBBC/Mn-oxide/Cu-oxide纳米复合材料在第五次循环中Cr去除率略低（8 %）。通过Freundlich和拟二级动力学模型可以很好地解释实验吸附数据。结果表明，纳米颗粒-生物炭复合材料对铬污染水体具有较好的修复效果。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.