Preparation of novel biochar-based ternary composite using graphitic carbon nitride and layer double hydroxide for Cr(VI) removal in wastewater

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-04-11 DOI:10.1016/j.molliq.2025.127582

Fakhra Sharif , Shafaqat Ali , Muhammad Zahid , Muhammad Adrees , Muhammad Saleem Arif

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引用次数: 0

Abstract

Chromium (Cr) is a toxic element released from leather tanning and textile industries. Thus, herein we synthesized biochar-based composites using graphitic carbon nitride (GCN) and layer double hydroxide (LDH) for Cr(VI) removal from wastewater. Biochar/GCN/LDH ternary composite showed the highest Cr(VI) (up to 95 %; 79.27 mg g⁻¹) sorption than biochar/LDH (90 %; 75.23 mg g⁻¹) and biochar/GCN composites (89 %; 74.86 mg g⁻¹) at pH 4,7 with 1.2 g L⁻¹ sorbent dose, 100 mg L⁻¹ Cr concentration and 2 h reaction time. The regeneration/recyclability study provided up to 98 % desorption of Cr(VI) from biochar/GCN/LDH ternary composite exhibiting its high recyclability potential. The –OH, carbonyl, M−O−M, M−O and O−M−O (M = Zn/Fe) functional groups as well as highly porous biochar composites removed Cr(VI) by ion exchange and electrostatic interactions. Thus, considering the efficient adsorption potential and stability of ecofriendly biochar-based composites, the commercial-scale application for real wastewater is highly recommended in continuous-flow systems.

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石墨氮化碳与层双氢氧化物制备新型生物炭基三元复合材料去除废水中的Cr（VI）

铬（Cr）是皮革制革和纺织工业释放的一种有毒元素。因此，本文以石墨氮化碳（GCN）和层双氢氧化物（LDH）为原料合成了生物炭基复合材料，用于去除废水中的Cr（VI）。生物炭/GCN/LDH三元复合材料Cr（VI）最高，可达95%；79.27 mg g−1)的吸附性优于生物炭/LDH (90%；75.23 mg g−1)和生物炭/GCN复合材料(89%；74.86 mg g−1),pH 4,7，吸附剂剂量为1.2 g L−1，Cr浓度为100 mg L−1，反应时间为2 h。再生/可回收性研究表明，生物炭/GCN/LDH三元复合材料对Cr（VI）的解吸率高达98%，表明其具有很高的可回收性潜力。-OH、羰基、M−O−M、M−O和O−M−O （M = Zn/Fe）官能团以及高孔生物炭复合材料通过离子交换和静电相互作用去除Cr（VI）。因此，考虑到生态友好型生物炭基复合材料的高效吸附潜力和稳定性，强烈建议在连续流系统中对实际废水进行商业规模应用。

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

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.