Enhancing manganese sorption: Batch and fixed-bed column studies on activated zeolite

• DOI: 10.1016/j.eti.2023.103495
• Publication Date: 2023-12-21T18:04:19Z
• Authors: Silmara Sanzana; Norberto J. Abreu; Marcela Levío-Raimán; José Proal-Nájera; Aahilyn Osorio; Santiago Maza; Linda Daniele; Jorge Castro-Rojas; Vicente Soto; Cristhian González; Christian Antileo
• Keywords: Langmuir adsorption model

Dissolved Mn2+ in groundwater is dangerous for human health since it may act as a neurotoxin. To address this issue, sorption has emerged an environmentally-friendly technology removal. This study aimed to assess the effect of activation Chilean natural zeolite, by modification its compensating cations with NaCl, on capacity removal using batch and fixed-bed column studies. The activated zeolites were characterized SEM-EDS, TXRF, XRD, N2 adsorption assays. results studies demonstrate that Na+ enhances these from 4.55 5.92 mg g-1, negligible changes pore structure. experimental data fitted well pseudo-second-order kinetic Langmuir models. Furthermore, MnOx(s) formed during was identified surface zeolite XRD SEM-EDS analysis. conducted at two bed heights: H1 (5 cm) H2 (10 cm). breakthrough curves adjusted models Thomas Dose-response. dose-response model adequately described both R2>0.90. system (qmdr) 2.38 5.13 H2, respectively. regeneration achieved NaCl solution improving efficiency after reuse. work highlights potential effective material viable improve water quality affected geogenic contamination.