An ecofriendly pectin-co-montmorillonite composite hydrogel for the separation of contaminant metal ions from water

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-11-26 DOI:10.1016/j.jwpe.2024.106629

João Gabriel Ribeiro , Rizia Maria Raimondi , Alana Gabrieli de Souza , Derval dos Santos Rosa , Alexandre Tadeu Paulino

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Abstract

The aim of this study was to investigate the synthesis, characterization, and sorption performance of ecofriendly pectin-co-montmorillonite composite hydrogels for the separation of potentially toxic elements (PTEs) from water. Hydrogels were synthesized using an environmentally friendly method, incorporating montmorillonite (MMT) at proportions ranging from 0 to 10 % in the tridimensional pectin (PC) network. The composite hydrogels were characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). Batch sorption studies were conducted to investigate the capacity to separate copper (Cu²⁺), nickel (Ni²⁺), manganese (Mn²⁺), zinc (Zn²⁺), cadmium (Cd²⁺), and hexavalent chromium (Cr⁶⁺) ions from water. Higher PTE separation efficiencies were found with hydrogels containing 1 % MMT, with greater selectivity for Cu²⁺ ions. An exhaustive sorption study revealed that the separation process of Cu²⁺ fits the pseudo-second-order kinetic model and Langmuir isotherm, with maximum sorption capacity (q_max) of ~36.8 mg of hydrogel per g of PTE. This indicates that PC-co-MMT composite hydrogels are efficient alternative sorbents for the selective separation of PTEs from water, with potential application in ecofriendly water purification systems.

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一种用于分离水中污染物金属离子的环保型果胶-蒙脱石复合水凝胶

本研究旨在研究用于从水中分离潜在有毒元素（PTEs）的环保型果胶-蒙脱石复合水凝胶的合成、表征和吸附性能。水凝胶的合成采用了一种环境友好型方法，在三维果胶（PC）网络中加入了蒙脱石（MMT），比例从 0% 到 10% 不等。傅立叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和热重分析（TGA）对复合水凝胶进行了表征。批量吸附研究调查了从水中分离铜 (Cu2+)、镍 (Ni2+)、锰 (Mn2+)、锌 (Zn2+)、镉 (Cd2+) 和六价铬 (Cr6+) 离子的能力。含 1% MMT 的水凝胶的 PTE 分离效率更高，对 Cu2+ 离子的选择性更大。详尽的吸附研究表明，Cu2+ 的分离过程符合伪二阶动力学模型和 Langmuir 等温线，每克 PTE 的最大吸附容量（qmax）约为 36.8 毫克水凝胶。这表明 PC-co-MMT 复合水凝胶是从水中选择性分离 PTE 的高效替代吸附剂，有望应用于生态友好型水净化系统。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies