Chromium (VI) remediation via biochar@polyaniline composite: advancing water treatment using biogas residue digestate

IF 21.8 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Composites and Hybrid Materials Pub Date : 2025-07-24 DOI:10.1007/s42114-025-01345-7

Ayoub Chaoui, Abdelaziz Imgharn, Ana C. Estrada, Aboubakr Ben Hamou, Salaheddine Farsad, Nisrine Nouj, Mohamed Ez-zahery, Tito Trindade, Abdallah Albourine, Noureddine El Alem

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Abstract

The demand for effective water treatment strategies has contributed for extensive research in materials chemistry, with great focus on advancing adsorbent technologies. This investigation centers on synthesizing and modifying carbonaceous materials, specifically biochar and its polyaniline composite (biochar@polyaniline: BC@PANI), to evaluate their effectiveness in eliminating hexavalent chromium Cr(VI) from aqueous solutions. The biochar composite was prepared using a straightforward in-situ chemical polymerization approach. The properties of biochar were modified by blending it with polyaniline at 25%, 50%, and 75% (w/w), successfully loaded into the biochar samples. For elucidating structural changes and functionalities introduced during modification, the synthesized materials were fully characterized using different techniques. The adsorption performance of BC@PANI50% was systematically evaluated through batch adsorption experiments. This PANI-modified biochar material exhibited exceptional adsorption capacity for Cr(VI) removal from aqueous samples, reaching 877.19 mg/g at 318.15 K, emphasizing its potential for water adsorption treatments. Our research in the kinetics of Cr(VI) removal showed that both pseudo-second-order and Langmuir models adequately described the adsorption process. Regeneration experiments demonstrated that, even after undergoing five cycles, BC@PANI showed 82.5% Cr(VI) removal indicating its exceptional reusability and stability. In summary, this study establishes the potential applicability of BC@PANI adsorption for the removal of Cr(VI) ions in water, providing a promising avenue for integrating such sorbents into water treatment engineering practices.

Graphical Abstract

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biochar@polyaniline复合修复铬（VI）：利用沼渣推进水处理

对有效的水处理策略的需求促进了材料化学的广泛研究，重点是推进吸附剂技术。本研究的重点是合成和改性碳质材料，特别是生物炭及其聚苯胺复合材料（biochar@polyaniline: BC@PANI），以评估其去除水溶液中六价铬Cr（VI）的有效性。生物炭复合材料是用直接的原位化学聚合方法制备的。将其与25%、50%和75% （w/w）的聚苯胺混合，成功地装载到生物炭样品中，对生物炭的性能进行了改性。为了阐明在改性过程中引入的结构变化和功能，利用不同的技术对合成材料进行了全面的表征。通过批量吸附实验，系统评价了BC@PANI50%的吸附性能。该聚苯胺改性的生物炭材料对水中样品的Cr（VI）的去除性能优异，在318.15 K下达到877.19 mg/g，表明其在水吸附处理中的潜力。我们对Cr（VI）去除动力学的研究表明，伪二阶模型和Langmuir模型都能很好地描述吸附过程。再生实验表明，即使经过5次循环，BC@PANI也能去除82.5%的Cr(VI)，这表明它具有出色的可重复使用性和稳定性。总之，本研究建立了BC@PANI吸附去除水中Cr（VI）离子的潜在适用性，为将此类吸附剂整合到水处理工程实践中提供了一条有希望的途径。图形抽象

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.