6533b7dbfe1ef96bd1270072

RESEARCH PRODUCT

Evaluation of adsorption ability of Cyclodextrin-Calixarene Nanosponges towards Pb2+ ion in aqueous solution

Paolo Lo MeoDemetrio MileaAlberto PettignanoAntonella Di VincenzoSalvatore CataldoPellegrino Conte

subject

NanospongesPolymers and PlasticsEnvironmental remediationSpeciationInorganic chemistryRemediation02 engineering and technology010402 general chemistry01 natural sciencesIonMetalAdsorptionCalixareneMaterials ChemistrySettore CHIM/01 - Chimica Analiticachemistry.chemical_classificationAqueous solutionCyclodextrinOrganic ChemistrySettore CHIM/06 - Chimica Organica021001 nanoscience & nanotechnologyAdsorption; FFC-NMR relaxometry; Lead; Nanosponges; Remediation; Speciation0104 chemical sciencesAnodic stripping voltammetrychemistryFFC-NMR relaxometryLeadvisual_artvisual_art.visual_art_mediumAdsorption0210 nano-technology

description

Abstract Different cyclodextrin-calixarene nanosponges (CyCaNSs) have been characterized by means of FFC-NMR relaxometry, and used as sorbents to remove Pb2+ ions from aqueous solutions. Considering that the removal treatments may involve polluted waters with different characteristics, the adsorption experiments were performed on solutions without and with the addition of background salts, under different operational conditions. The adsorption abilities and affinities of the nanosponges towards Pb2+ ions were investigated by measuring the metal ion concentration by means of Inductively Coupled Plasma Emission Spectroscopy (ICP-OES) and Differential Pulse Anodic Stripping Voltammetry (DP-ASV). The acid-base properties of nanosponges and of metal ion as well as their interactions with the other interacting components of the systems have been considered in the evaluation of adsorption mechanism. Recycling and reuse experiments on the most efficient adsorbents were also performed. On the grounds of the results obtained, post-modified CyCaNSs appear promising materials for designing environmental remediation devices.

yearjournalcountryeditionlanguage
2021-09-01
10.1016/j.carbpol.2021.118151http://hdl.handle.net/10447/511619