白垩质石灰石可持续净化铬黑 T 的水:动力学、等温线和平衡

IF 2.2 4区 化学 Q2 Engineering Chemical Papers Pub Date : 2024-10-09 DOI:10.1007/s11696-024-03701-1
Sahbaa Younis Majeed, Enaam Ahmed Hamdon, Samie Yaseen Sharaf Zeebaree, Aymn Yaseen Sharaf Zeebaree
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引用次数: 0

摘要

我们采用了一种可持续、环保、有效的吸附剂来去除污水中的铒料黑 T(EBT)有毒染料。这种吸附剂取自天然白垩质石灰石,使用各种研究工具对其进行了全面的表征,包括 X 射线衍射、能量色散 X 射线光谱、布鲁纳尔-艾美特-泰勒、场发射扫描电子显微镜、透射电子显微镜、动态光散射、ZETA 电位、热重分析(TGA)和紫外可见光技术。白垩质石灰石表现出独特的特性,在短时间内实现了高效的去除率和高容量。采用伪一阶和伪二阶模型进行了动力学研究,以评估反应速度,得出的 R2 值分别为 0.67 和 0.62。此外,还利用 Langmuir 和 Freundlich 模型进行了热研究,以阐明白垩质石灰石活性位点与 EBT 染料分子之间的相互作用性质,结果 R2 值分别为 0.75 和 0.91。研究结果表明,吸附过程在短短五分钟内就达到了平衡,吸附容量(qt)约为 1.99 mg g-1,白垩质石灰石可重复使用多达五个周期,而去除效率不会降低,也不需要解吸步骤。
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Chalky limestone as sustainable water purification from eriochrome black T: kinetics, isotherm, and equilibrium

A sustainable, eco-friendly, and effective adsorbent has been employed for the removal of eriochrome black T (EBT) toxic dye from the effluent. This adsorbent, derived from natural chalky limestone, underwent thorough characterization using various investigative tools, including X-ray diffraction, energy-dispersive X-ray spectroscopy, Brunauer–Emmett–Teller, field emission scanning electron microscopy, transmission electron microscopy, dynamic light scattering, zeta potential, thermogravimetric analysis (TGA), and ultraviolet–visible technique. The chalky limestone exhibited distinctive properties, achieving an efficient removal percentage and high capacity within a short timeframe. Kinetic studies were conducted to assess the reaction speed, employing both pseudo-first-order and pseudo-second-order models, yielding R2 values of 0.67 and 0.62, respectively. Furthermore, thermal studies were carried out using Langmuir and Freundlich models to elucidate the interaction nature between the active sites of chalky limestone and EBT dye molecules, resulting in R2 values of 0.75 and 0.91, respectively. The research findings indicated that the adsorption process achieved equilibrium in just five minutes with adsorption capacity (qt) about 1.99 mg g−1, and the chalky limestone showed the ability to be reused for up to five cycles without any decrease in removal efficiency or requiring a desorption step.

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来源期刊
Chemical Papers
Chemical Papers Chemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍: Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.
期刊最新文献
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