{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T13:06:33Z","timestamp":1785330393608,"version":"3.55.0"},"reference-count":68,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T00:00:00Z","timestamp":1783728000000},"content-version":"vor","delay-in-days":10,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100020912","name":"King Faisal University","doi-asserted-by":"publisher","award":["KFU263355"],"award-info":[{"award-number":["KFU263355"]}],"id":[{"id":"10.13039\/501100020912","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Water Environment Research"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The adsorption of Mn\n                    <jats:sup>2+<\/jats:sup>\n                    on montmorillonite and optimization by response surface methodology have been studied. The alteration of K10 and MMT\u2010Na by sodium dodecyl sulfate (SDS) yields promising data on Mn\n                    <jats:sup>2+<\/jats:sup>\n                    uptake. The SDS\u2010induced embolism of K10 and MMT\u2010Na montmorillonites opens lamellae and increases surface area, thereby increasing their adsorption capacity for Mn\n                    <jats:sup>2+<\/jats:sup>\n                    . The adsorption of Mn\n                    <jats:sup>2+<\/jats:sup>\n                    increases slightly with increasing pH until pH\u2009=\u20098. From the Mn\n                    <jats:sup>2+<\/jats:sup>\n                    species distribution, at pH &lt;\u20098.5, Mn\n                    <jats:sup>2+<\/jats:sup>\n                    is the only soluble form in solution, and no other species form before pH\u2009=\u20098. The best RSM model describing the adsorption of Mn\n                    <jats:sup>2+<\/jats:sup>\n                    on K10 and K10\u2010SDS was the linear degree model (adj.\n                    <jats:italic>R<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    \u2009=\u20090.626, 0.668, respectively), while the best RSM model for MMT\u2010Na and MMT\u2010SDS (adj.\n                    <jats:italic>R<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    \u2009=\u20090.897, 0.894, respectively) was the central composite design. In RSM modeling,\n                    <jats:italic>C<\/jats:italic>\n                    <jats:sub>0<\/jats:sub>\n                    (mg\/L) was the highest effective parameter (\n                    <jats:italic>p<\/jats:italic>\n                    value for all clays &lt;\u20090.0001) among\n                    <jats:italic>C<\/jats:italic>\n                    <jats:sub>0<\/jats:sub>\n                    (mg\/L), CT (min), and\n                    <jats:italic>T<\/jats:italic>\n                    (\u00b0C). Practical and simulated adsorption isotherms show a best\u2010fitting Langmuir isotherm, with an increase in the maximum adsorption capacity (\n                    <jats:italic>q<\/jats:italic>\n                    <jats:sub>m<\/jats:sub>\n                    ) (mg\/g) from K10 (5.95) to K0\u2010SDS (10.22) and from MMT\u2010Na (19.63) to MMT\u2010SDS (21.41). The best\u2010fitting adsorption kinetic model was the pseudo\u2010second\u2010order (PSO) model for all studied clay forms. The adsorption mechanism for all clay forms involved the Boyd liquid\u2010film diffusion step, followed by Boyd interparticle diffusion, both of which are rate\u2010limiting. The adsorption of Mn\n                    <jats:sup>2+<\/jats:sup>\n                    is thermodynamically endothermic, with higher \u0394H\u00b0 values (kJ\/Mol) in the modified clays (+46.3 for K10\u2010SDS and +62.5 for MMT\u2010SDS) than in the unmodified clays (+39.8 and +23.2). Gibbs free energy \u0394\n                    <jats:italic>G<\/jats:italic>\n                    \u00b0 (KJ\/Mol) becomes increasingly negative as the temperature of the adsorption medium rises for all examined clay forms. Wet analysis of total organic carbon (TOC) shows 71.3% of intercalation of SDS in K10\u2010SDS and 77.5% for MMT\u2010SDS. The intercalation increases the selectivity of Mn\n                    <jats:sup>2+<\/jats:sup>\n                    among many cations (equivalent cation exchange capacity (CEC)\u2009=\u200931.3, 46.4, 74.74, and 80.3\u2009meq\/100\u2009g for K10, K10\u2010SDS, MMT\u2010Na, and MMT\u2010SDS, respectively). The presence of total manganese in the application removal increases with intercalation by SDS from groundwater (Removal%: 67.7, 84.2, 69.9, and 81.2 for K10, K10\u2010SDS, MMT\u2010Na, and MMT\u2010SDS, respectively).\n                  <\/jats:p>","DOI":"10.1002\/wer.70483","type":"journal-article","created":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T10:10:32Z","timestamp":1783764632000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Response Surface Analysis of Manganese Removal Onto Sodium Dodecyl Sulfate\u2013Modified Montmorillonite Clay"],"prefix":"10.1002","volume":"98","author":[{"given":"Abu\u2010Alhassan","family":"Abd\u2010Elshafi","sequence":"first","affiliation":[{"name":"Sohag Drinking Water &amp; Sanitation Company  Sohag Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kawther","family":"Al\u2010Amer","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Science King Faisal University  Al\u2010Ahsa Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mai M.","family":"Khalaf","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Science King Faisal University  Al\u2010Ahsa Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0599-9928","authenticated-orcid":false,"given":"Hany M.","family":"Abd El\u2010Lateef","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Science King Faisal University  Al\u2010Ahsa Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amer A.","family":"Amer","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science Sohag University  Sohag Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"El\u2010Shater","sequence":"additional","affiliation":[{"name":"Geology Department, Faculty of Science Sohag University  Sohag Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7835-6926","authenticated-orcid":false,"given":"Saad","family":"Shaaban","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Science King Faisal University  Al\u2010Ahsa Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6306-5384","authenticated-orcid":false,"given":"Mahmoud","family":"Elrouby","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science Sohag University  Sohag Egypt"},{"name":"Faculty of Science Sohag National University  New Sohag Sohag Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,11]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.7753\/ijsea0404.1004"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.molliq.2023.122092"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clay.2015.08.016"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.4172\/2157\u20107048.1000154"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aej.2015.03.025"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41598\u2010018\u201029210\u20102"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.psep.2015.07.012"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1155\/2017\/3039817"},{"key":"e_1_2_11_10_1","volume-title":"Standard Methods for the Examination of Water and Wastewater","author":"Baird R. B.","year":"2017"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejpe.2018.05.003"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtice.2012.09.007"},{"key":"e_1_2_11_13_1","volume-title":"Methods of Soil Analysis Part 3: Chemical Methods","author":"Bartels J. M.","year":"1996"},{"key":"e_1_2_11_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0169\u20101317(97)00012\u20104"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clay.2013.11.020"},{"key":"e_1_2_11_16_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10450\u2010006\u20100375\u20101"},{"key":"e_1_2_11_17_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja01203a066"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2011.12.036"},{"key":"e_1_2_11_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.compchemeng.2021.107474"},{"key":"e_1_2_11_20_1","volume-title":"Soil Sampling and Methods of Analysis","author":"Carter M. R.","year":"2008"},{"key":"e_1_2_11_21_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clay.2020.105642"},{"key":"e_1_2_11_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.dib.2019.105022"},{"key":"e_1_2_11_23_1","doi-asserted-by":"publisher","DOI":"10.1002\/1097-4660(200011)75:11<963::AID-JCTB302>3.0.CO;2-Z"},{"key":"e_1_2_11_24_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jaap.2022.105788"},{"key":"e_1_2_11_25_1","doi-asserted-by":"publisher","DOI":"10.1142\/9781860943829_0007"},{"key":"e_1_2_11_26_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clay.2020.105602"},{"issue":"10","key":"e_1_2_11_27_1","first-page":"5001","article-title":"Evaluation of the Absorption Capacity of the Natural Clay From Bikougou (Gabon) to Remove Mn(II) From Aqueous Solution","volume":"2","author":"Eba F.","year":"2010","journal-title":"International Journal of Engineering, Science and Technology"},{"key":"e_1_2_11_28_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.desal.2010.02.041"},{"key":"e_1_2_11_29_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jiec.2013.12.072"},{"key":"e_1_2_11_30_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.psep.2015.06.006"},{"key":"e_1_2_11_31_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2009.09.013"},{"key":"e_1_2_11_32_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtusci.2014.05.001"},{"key":"e_1_2_11_33_1","doi-asserted-by":"publisher","DOI":"10.1346\/CCMN.1970.0180404"},{"key":"e_1_2_11_34_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0043-1354(99)00232-8"},{"key":"e_1_2_11_35_1","doi-asserted-by":"publisher","DOI":"10.4236\/ojpc.2014.44017"},{"key":"e_1_2_11_36_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.sajce.2022.03.008"},{"key":"e_1_2_11_37_1","doi-asserted-by":"publisher","DOI":"10.9790\/5736\u20107915456"},{"key":"e_1_2_11_38_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clay.2016.12.041"},{"key":"e_1_2_11_39_1","doi-asserted-by":"publisher","DOI":"10.1002\/wics.73"},{"key":"e_1_2_11_40_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.promfg.2019.02.216"},{"key":"e_1_2_11_41_1","first-page":"1","article-title":"About the Theory of So\u2010Called Adsorption of Soluble Substances","volume":"24","author":"Lagargren S.","year":"1898","journal-title":"Handlinger"},{"key":"e_1_2_11_42_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhazmat.2009.08.047"},{"key":"e_1_2_11_43_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.molliq.2018.10.048"},{"key":"e_1_2_11_44_1","doi-asserted-by":"publisher","DOI":"10.3390\/ma3042588"},{"key":"e_1_2_11_45_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4020-2303-3"},{"key":"e_1_2_11_46_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12034\u2010011\u20100376\u2010x"},{"key":"e_1_2_11_47_1","doi-asserted-by":"publisher","DOI":"10.1038\/2161204a0"},{"key":"e_1_2_11_48_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.gsd.2022.100757"},{"key":"e_1_2_11_49_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1572-4352(05)01035-4"},{"key":"e_1_2_11_50_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.renene.2021.04.117"},{"key":"e_1_2_11_51_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtice.2018.01.010"},{"key":"e_1_2_11_52_1","unstructured":"Mthombeni N. H. S.Mbakop andM. S.Onyango.2016. \u201cAdsorptive Removal of Manganese From Industrial and Mining Wastewater.\u201d 2016 Annu. Conf. Sustain. Res. Innov. no. May pp. 36\u201345 2016 36 45."},{"key":"e_1_2_11_53_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.watres.2017.04.014"},{"key":"e_1_2_11_54_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arabjc.2022.104329"},{"key":"e_1_2_11_55_1","doi-asserted-by":"publisher","DOI":"10.9790\/5736\u20100313845"},{"key":"e_1_2_11_56_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jece.2015.11.028"},{"key":"e_1_2_11_57_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jece.2014.01.014"},{"key":"e_1_2_11_58_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.geodrs.2015.08.002"},{"key":"e_1_2_11_59_1","volume-title":"5\u2014A Comprehensive Review of Glyphosate Adsorption With Factors Influencing Mechanism: Kinetics, Isotherms, Thermodynamics Study","author":"Sen K.","year":"2021"},{"key":"e_1_2_11_60_1","doi-asserted-by":"crossref","unstructured":"Tekin \u015e. F.Erol and\u015e.Y.2018. \u201cMercury(II) Adsorption by a Novel Adsorbent Mercapto\u2010Modified Bentonite Using ICP\u2010OES and Use of Response Surface Methodology for Optimisation.\u201d138:360\u2013368.https:\/\/doi.org\/10.1016\/j.microc.2018.01.028.","DOI":"10.1016\/j.microc.2018.01.028"},{"issue":"3","key":"e_1_2_11_61_1","first-page":"370","article-title":"Comparison of Different Kinetic Models for Adsorption of Heavy Metals onto Activated Carbon From Apricot Stones","volume":"43","author":"Tsibranska I.","year":"2011","journal-title":"Bulgarian Chemical Communications"},{"issue":"1","key":"e_1_2_11_62_1","first-page":"157","article-title":"Adsorption, Kinetic, Equilibrium and Thermodynamic Studies on the Removal of Basic Dye Rhodamine\u2010B From Aqueous Solution by the Use of Natural Adsorbent Perlite","volume":"3","author":"Vijayakumar G.","year":"2012","journal-title":"Journal of Materials and Environmental Science"},{"key":"e_1_2_11_63_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhazmat.2020.122156"},{"key":"e_1_2_11_64_1","doi-asserted-by":"publisher","DOI":"10.1002\/aic.690200204"},{"key":"e_1_2_11_65_1","doi-asserted-by":"publisher","DOI":"10.1061\/JSEDAI.0000430"},{"key":"e_1_2_11_66_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clay.2016.01.026"},{"key":"e_1_2_11_67_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.colsurfa.2020.125979"},{"key":"e_1_2_11_68_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10924\u2010022\u201002617\u20109"},{"key":"e_1_2_11_69_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10706\u2010008\u20109191\u20106"}],"container-title":["Water Environment Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/wer.70483","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/wer.70483","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/wer.70483","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T12:32:49Z","timestamp":1785328369000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/wer.70483"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,7]]},"references-count":68,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2026,7]]}},"alternative-id":["10.1002\/wer.70483"],"URL":"https:\/\/doi.org\/10.1002\/wer.70483","archive":["Portico"],"relation":{},"ISSN":["1061-4303","1554-7531"],"issn-type":[{"value":"1061-4303","type":"print"},{"value":"1554-7531","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,7]]},"assertion":[{"value":"2026-05-09","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-06-25","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-07-11","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e70483"}}