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基于蛋壳废料的创新型低成本复合纳米吸附剂用于从水介质中去除镍

Innovative Low-Cost Composite Nanoadsorbents Based on Eggshell Waste for Nickel Removal from Aqueous Media.

作者信息

Segneanu Adina-Elena, Trusca Roxana, Cepan Claudiu, Mihailescu Maria, Muntean Cornelia, Herea Dumitru Daniel, Grozescu Ioan, Salifoglou Athanasios

机构信息

Institute for Advanced Environmental Research, West University of Timisoara (ICAM-WUT), 4 Oituz St., 300086 Timișoara, Romania.

National Center for Micro and Nanomaterials, Politehnica University of Bucharest, Str. Splaiul Independenţei, Nr. 313, 060042 Bucharest, Romania.

出版信息

Nanomaterials (Basel). 2023 Sep 16;13(18):2572. doi: 10.3390/nano13182572.

DOI:10.3390/nano13182572
PMID:37764601
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10537637/
Abstract

In a contemporary sustainable economy, innovation is a prerequisite to recycling waste into new efficient materials designed to minimize pollution and conserve non-renewable natural resources. Using an innovative approach to remediating metal-polluted water, in this study, eggshell waste was used to prepare two new low-cost nanoadsorbents for the retrieval of nickel from aqueous solutions. Scanning electron microscopy (SEM) results show that in the first eggshell-zeolite (EZ) adsorbent, the zeolite nanoparticles were loaded in the eggshell pores. The preparation for the second (iron(III) oxide-hydroxide)-eggshell-zeolite (FEZ) nanoadsorbent led to double functionalization of the eggshell base with the zeolite nanoparticles, upon simultaneous loading of the pores of the eggshell and zeolite surface with FeOOH particles. Structural modification of the eggshell led to a significant increase in the specific surface, as confirmed using BET analysis. These features enabled the composite EZ and FEZ to remove nickel from aqueous solutions with high performance and adsorption capacities of 321.1 mg/g and 287.9 mg/g, respectively. The results indicate that nickel adsorption on EZ and FEZ is a multimolecular layer, spontaneous, and endothermic process. Concomitantly, the desorption results reflect the high reusability of these two nanomaterials, collectively suggesting the use of waste in the design of new, low-cost, and highly efficient composite nanoadsorbents for environmental bioremediation.

摘要

在当代可持续经济中，创新是将废物回收转化为新型高效材料的先决条件，这些材料旨在最大限度地减少污染并保护不可再生自然资源。本研究采用创新方法修复金属污染水，利用蛋壳废料制备了两种新型低成本纳米吸附剂，用于从水溶液中回收镍。扫描电子显微镜（SEM）结果表明，在第一种蛋壳-沸石（EZ）吸附剂中，沸石纳米颗粒负载在蛋壳孔隙中。第二种（氢氧化铁（III））-蛋壳-沸石（FEZ）纳米吸附剂的制备过程中，在蛋壳孔隙和沸石表面同时负载FeOOH颗粒，从而使蛋壳基体实现了双重功能化。使用BET分析证实，蛋壳的结构改性导致比表面积显著增加。这些特性使复合EZ和FEZ能够从水溶液中高效去除镍，吸附容量分别为321.1 mg/g和287.9 mg/g。结果表明，镍在EZ和FEZ上的吸附是一个多分子层、自发且吸热的过程。同时，解吸结果反映了这两种纳米材料的高可重复使用性，总体表明可在设计用于环境生物修复的新型、低成本且高效的复合纳米吸附剂时利用废料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/5576cdb0ee9c/nanomaterials-13-02572-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/b2f04e1f06a7/nanomaterials-13-02572-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/5576cdb0ee9c/nanomaterials-13-02572-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/2182b677a92a/nanomaterials-13-02572-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/b8652e897530/nanomaterials-13-02572-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/b1d72c4de4b0/nanomaterials-13-02572-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/b34e40053755/nanomaterials-13-02572-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/c407ee596657/nanomaterials-13-02572-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/7c226018dc0f/nanomaterials-13-02572-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/bd865ac6720f/nanomaterials-13-02572-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/4da9b5fe7e03/nanomaterials-13-02572-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/b2f04e1f06a7/nanomaterials-13-02572-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/0817a1b9d26c/nanomaterials-13-02572-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/7ee30082dc49/nanomaterials-13-02572-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/08c1c9b20f97/nanomaterials-13-02572-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5884/10537637/5576cdb0ee9c/nanomaterials-13-02572-g013.jpg

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