{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T00:44:06Z","timestamp":1793234646872,"version":"4.5.0"},"reference-count":55,"publisher":"IWA Publishing","issue":"5","license":[{"start":{"date-parts":[[2023,2,15]],"date-time":"2023-02-15T00:00:00Z","timestamp":1676419200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"the National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["41472034"],"award-info":[{"award-number":["41472034"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100004608","name":"Natural Science Foundation of Jiangsu Province","doi-asserted-by":"publisher","award":["BK20191444"],"award-info":[{"award-number":["BK20191444"]}],"id":[{"id":"10.13039\/501100004608","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["iwaponline.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2023,3,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n               <jats:p\/>\n               <jats:p>Iron oxyhydroxides for heavy metal treatment have attracted wide attention. In this work, iron oxyhydroxides of isomeric FeOOH (GpI) and tunnel-structural schwertmannite\/akagan\u00e9ite (GpII) were selected to study chromium (Cr(III)) adsorption removal from acidic aqueous solutions by batch experiments, under various reaction time, adsorbate\/adsorbent level, pH and anions. Adsorption processes well fitted to pseudo-second-order kinetics (R2 = 0.992\u20130.999, except for 0.829 for Lep). Isotherm data could be fitted by Langmuir (R2 = 0.901\u20130.985), Freundlich (R2 = 0.884\u20130.985) and Temkin (R2 = 0.845\u20130.961) models at pH 3.7. Langmuir maximum adsorption capacities (mg\/g) were 10.4\u221218.8 (FeOOH, except for 3.08 for Gth2) in GpI, and 20.60\/43.40 (Sch-Chem\/Sch-Bio) and 12.80\/24.70 (Aka-Chem\/Aka-Bio) in GpII. Adsorption capacities would gradually increase as Cr(III) concentrations increased within 0\u221240 mg\/L, and could be markedly affected by the SO42- and H2PO4- anions. There were stable adsorption capacities at about pH 3.7, and then increased at pH 3.7\u20134.1. The Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) results showed that adsorption mechanisms were electrostatic interaction and surface complexation. In addition, three optimal bio-\/chem-schwertmannite and lepidocrocite adsorbents had good reusable properties and treating abilities of Cr(III)-polluted waters at pH 4.0. These results could provide a theoretical basis for the application of iron oxyhydroxides in removing Cr(III) from acid wastewaters.<\/jats:p>","DOI":"10.2166\/wst.2023.049","type":"journal-article","created":{"date-parts":[[2023,2,15]],"date-time":"2023-02-15T15:59:51Z","timestamp":1676476791000},"page":"1140-1158","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":11,"title":["Chromium(III) adsorption removal from acidic solutions by isomeric and tunnel-structural iron oxyhydroxides"],"prefix":"10.2166","volume":"87","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0160-0991","authenticated-orcid":false,"given":"Huixin","family":"Xiong","sequence":"first","affiliation":[{"name":"1 College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Xu","sequence":"additional","affiliation":[{"name":"1 College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shiqing","family":"Li","sequence":"additional","affiliation":[{"name":"1 College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiqun","family":"Xu","sequence":"additional","affiliation":[{"name":"1 College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"945","published-online":{"date-parts":[[2023,2,15]]},"reference":[{"issue":"12","key":"2024072317313805400_WST-D-22-01023C1","doi-asserted-by":"crossref","first-page":"14044","DOI":"10.1007\/s11356-020-07756-x","article-title":"The role of bentonite clay and bentonite clay@MnFe2O4 composite and their physico chemical properties on the removal of Cr(III) and Cr(VI) from aqueous media","volume":"27","year":"2020","journal-title":"Environ. 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