{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T15:33:03Z","timestamp":1792855983859,"version":"4.5.0"},"reference-count":78,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2023,9,16]],"date-time":"2023-09-16T00:00:00Z","timestamp":1694822400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Research, Innovation and Digitization CNCS\u2013UEFISCDI","award":["PN-III-P4-PCE-2021-1081"],"award-info":[{"award-number":["PN-III-P4-PCE-2021-1081"]}]},{"name":"Ministry of Research, Innovation and Digitization CNCS\u2013UEFISCDI","award":["75\/2022"],"award-info":[{"award-number":["75\/2022"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>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\u2013zeolite (EZ) adsorbent, the zeolite nanoparticles were loaded in the eggshell pores. The preparation for the second (iron(III) oxide-hydroxide)\u2013eggshell\u2013zeolite (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.<\/jats:p>","DOI":"10.3390\/nano13182572","type":"journal-article","created":{"date-parts":[[2023,9,17]],"date-time":"2023-09-17T23:25:26Z","timestamp":1694993126000},"page":"2572","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Innovative Low-Cost Composite Nanoadsorbents Based on Eggshell Waste for Nickel Removal from Aqueous Media"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1623-8094","authenticated-orcid":false,"given":"Adina-Elena","family":"Segneanu","sequence":"first","affiliation":[{"name":"Institute for Advanced Environmental Research, West University of Timisoara (ICAM-WUT), 4 Oituz St., 300086 Timi\u0219oara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roxana","family":"Trusca","sequence":"additional","affiliation":[{"name":"National Center for Micro and Nanomaterials, Politehnica University of Bucharest, Str. Splaiul Independen\u0163ei, Nr. 313, 060042 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claudiu","family":"Cepan","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry and Engineering of Inorganic Compounds and the Environment, University Politehnica Timisoara, Piata Victoriei Nr. 2, 300006 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Mihailescu","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry and Engineering of Inorganic Compounds and the Environment, University Politehnica Timisoara, Piata Victoriei Nr. 2, 300006 Timisoara, Romania"},{"name":"Research Institute for Renewable Energy, 138 Gavril Musicescu St., 300501 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1415-8541","authenticated-orcid":false,"given":"Cornelia","family":"Muntean","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry and Engineering of Inorganic Compounds and the Environment, University Politehnica Timisoara, Piata Victoriei Nr. 2, 300006 Timisoara, Romania"},{"name":"Research Institute for Renewable Energy, 138 Gavril Musicescu St., 300501 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8455-8380","authenticated-orcid":false,"given":"Dumitru Daniel","family":"Herea","sequence":"additional","affiliation":[{"name":"National Institute of Research and Development for Technical Physics, 47 Mangeron Blvd, 700050 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ioan","family":"Grozescu","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry and Engineering of Inorganic Compounds and the Environment, University Politehnica Timisoara, Piata Victoriei Nr. 2, 300006 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Athanasios","family":"Salifoglou","sequence":"additional","affiliation":[{"name":"Laboratory of Inorganic Chemistry and Advanced Materials, School of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,9,16]]},"reference":[{"key":"ref_1","unstructured":"EPA\u2014United States Environmental Protection Agency (2022, December 28). 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