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Subsequent immobilization of <jats:bold>L1<\/jats:bold> on mesoporous silica supports (SBA-15 and MCM-41) following a divergent method produced the respective fabricated <jats:bold>L1@SBA-15<\/jats:bold> and <jats:bold>L1@MCM-41<\/jats:bold> materials. Characterization of the fabricated chelating agents was accomplished using SEM, TEM, EDX, BET, PXRD, FT-IR, and TGA-DTA\/DSC techniques. The fabricated materials were used as adsorbents for the removal of Cd(II), Pb(II) and Cr(VI) metal ions from water. Both the <jats:bold>L1@SBA-15<\/jats:bold> and <jats:bold>L1@MCM-41<\/jats:bold> materials demonstrated high extraction efficiencies for Cd(II) and Pb(II)\u00a0cations, achieving over 98% and 97% removal, respectively, across a broad pH range (3\u20139). For Cr(VI)\u00a0anions, relatively lower\u00a0optimal extraction efficiencies of 67% and 77% were recorded between pH 3\u201312, for <jats:bold>L1@SBA-15<\/jats:bold> and <jats:bold>L1@MCM-41<\/jats:bold>, adsorbents, respectively. Faster extraction kinetics were observed for Cd(II) and Pb(II)\u00a0cations, with over 94% removal achieved within 30\u00a0min, even at low initial metal concentrations (5\u00a0ppm) and adsorbent dosages (10\u00a0mg). Kinetic modelling showed that the adsorption process followed a <jats:italic>pseudo<\/jats:italic>-second-order\u00a0kinetics, with high correlation coefficients (R<jats:sup>2<\/jats:sup>) for Cd(II), Pb(II), and Cr(VI) of 0.97573, 0.97348, and 0.91017 using <jats:bold>L1@MCM-41<\/jats:bold>, and 0.9754, 0.97089, and 0.89411 using <jats:bold>L1@SBA-15<\/jats:bold>, respectively. Equilibrium data best fitted the Freundlich isotherm model, with R<jats:sup>2<\/jats:sup> values of 0.97952, 0.99892, and 0.97374 for <jats:bold>L1@SBA-15<\/jats:bold> and 0.99879, 0.99999, and 0.90923 for <jats:bold>L1@MCM-41<\/jats:bold>, corresponding to Cd(II), Pb(II), and Cr(VI), respectively. In competitive metal ion systems, the extraction selectivity followed the order Cd(II)\u2009&gt;\u2009Pb(II)\u2009&gt;\u2009Cr(VI), with <jats:bold>L1@SBA-15<\/jats:bold> exhibiting superior overall performance compared to <jats:bold>L1@MCM-41<\/jats:bold>. The extraction mechanism was postulated to occur through the\u00a0coordination of the metal ions to the\u00a0nitrogen\/sulfur donor atoms\u00a0in the chelating agents, consistent with the hard and soft acid and base (HSAB) principle. Furthermore, <jats:bold>L1@MCM-41<\/jats:bold> demonstrated notable regeneration potential, retaining Cr(VI) extraction efficiencies over four successive cycles.<\/jats:p>\n          <jats:p>\n            <jats:bold>Graphical Abstract<\/jats:bold>\n          <\/jats:p>","DOI":"10.1007\/s11356-025-36705-9","type":"journal-article","created":{"date-parts":[[2025,7,4]],"date-time":"2025-07-04T23:32:32Z","timestamp":1751671952000},"page":"17776-17791","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Fabrication of (amino)thiol chelating agents on SBA-15 and MCM-41 and applications in the extraction of Cd(II), Pb(II) and Cr(VI) cations from aqueous solutions"],"prefix":"10.1007","volume":"32","author":[{"given":"Siphosethu","family":"Maqinana","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chrispin B. 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