The Adsorption Potential of Cr from Water by ZnO Nanoparticles Synthesized by Azolla pinnata.

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2022-10-11 eCollection Date: 2022-01-01 DOI:10.1155/2022/6209013

Ou Wenjie, Waqas Ahmed, Fu Xiuxian, Wang Lu, Li Jiannan, Yang Jie, Rana Muhammad Ammar Asghar, Mohsin Mahmood, Juha M Alatalo, Muhammad Imtiaz, Weidong Li, Sajid Mehmood

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引用次数: 2

Abstract

Aqueous solutions containing toxic elements (TEs) (such as hexavalent chromium (Cr (VI)) can be toxic to humans even at trace levels. Thus, removing TEs from the aqueous environment is essential for the protection of biodiversity, hydrosphere ecosystems, and humans. For plant fabrication of zinc oxide nanoparticles (PF-ZnONPs), Azolla pinnata plants were used, and X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), SEM, and FTIR techniques were used for the identification of PF-ZnONPs and ZnONPs, which were used to remove Cr (VI) from aqueous solution. A number of adsorption parameters were studied, including pH, dose, concentration of metal ions, and contact time. The removal efficiency of PF-ZnONPs for Cr (VI) has been found to be 96% at a time (60 min), 69.02% at pH 4, and 70.43% at a dose (10 mg·L^-1). It was found that the pseudo-second-order model best described the adsorption of Cr (VI) onto PF-ZnONPs, indicating a fast initial adsorption via diffusion. The experimental data were also highly consistent with the Langmuir isotherm model calculations.

Abstract Image

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由羽状萍合成的ZnO纳米颗粒对水中铬的吸附势。

含有有毒元素(TEs)(如六价铬(Cr (VI))的水溶液即使是微量含量也可能对人体有毒。因此，从水环境中去除TEs对于保护生物多样性、水圈生态系统和人类至关重要。采用植物制备氧化锌纳米粒子(PF-ZnONPs)，利用x射线衍射(XRD)、能谱(EDS)、扫描电镜(SEM)和红外光谱(FTIR)技术对其进行鉴定，并将其用于去除水溶液中的Cr (VI)。研究了pH、剂量、金属离子浓度和接触时间等吸附参数。结果表明，PF-ZnONPs对Cr (VI)的去除率为96% (60 min)， pH为4时为69.02%，剂量为10 mg·L-1时为70.43%。结果表明，准二阶模型最能描述f - znonps对Cr (VI)的吸附，表明其通过扩散进行了快速的初始吸附。实验数据也与Langmuir等温线模型计算结果高度一致。

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

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.