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In this study, the interaction of DOM with synthetic CrO<jats:sub>4<\/jats:sub><jats:sup>2\u2212<\/jats:sup>\u2013schwertmannite was investigated to better understand the potential fate of Cr in high\u2010DOM environments. Minerals and their products were analyzed using Fourier transform infrared spectroscopy, X\u2010ray diffraction, transmission electron microscopy, scanning electron microscopy, and X\u2010ray photoelectron spectroscopy. Experiments were conducted at pH 3.2 or 6.5 for different lengths of time, with a shrinking core model developed to describe kinetic processes. The concentration of total Cr in solution reached a maximum when the pH was 6.5 and the concentration of L\u2010tryptophan was 5 mM. The newly formed minerals were confirmed to be mixtures involving residual schwertmannite, goethite, ferrihydrite, and jarosite. A possible mechanism is proposed to be a ligand\u2010controlled binary system, accompanied by possible reduction at acidic pH conditions (3.2), including mass transfer and charge transfer processes. This study gives a new perspective for understanding the reactivity and stability of schwertmannite in the environment; it also provides some predictions on the mobility and fate of Cr. These findings will help design remediation strategies for Cr contamination.<\/jats:p><\/jats:sec><jats:sec><jats:title>Core Ideas<\/jats:title><jats:p><jats:list list-type=\"bullet\">\n<jats:list-item><jats:p>The effects of various factors on release of Cr by DOM were considered.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>A possible mechanism for the release of Cr from schwertmannite was proposed.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>The time\u2010dependent product formation has been identified.<\/jats:p><\/jats:list-item>\n<\/jats:list><\/jats:p><\/jats:sec>","DOI":"10.2134\/jeq2017.03.0122","type":"journal-article","created":{"date-parts":[[2017,9,7]],"date-time":"2017-09-07T17:53:55Z","timestamp":1504806835000},"page":"1088-1097","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Role of Dissolved Organic Matter in the Release of Chromium from Schwertmannite: Kinetics, Repartition, and Mechanisms"],"prefix":"10.1002","volume":"46","author":[{"given":"Yingying","family":"Xie","sequence":"first","affiliation":[{"name":"School of Environment and Energy, South China Univ. of Technology Guangzhou 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guining","family":"Lu","sequence":"additional","affiliation":[{"name":"School of Environment and Energy, South China Univ. of Technology Guangzhou 510006 China"},{"name":"The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education, South China Univ. of Technology Guangzhou 510006 China"},{"name":"Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal South China Univ. of Technology Guangzhou 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Han","family":"Ye","sequence":"additional","affiliation":[{"name":"School of Environment and Energy, South China Univ. of Technology Guangzhou 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengfang","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Environment and Energy, South China Univ. of Technology Guangzhou 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyun","family":"Yi","sequence":"additional","affiliation":[{"name":"School of Environment and Energy, South China Univ. of Technology Guangzhou 510006 China"},{"name":"The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education, South China Univ. of Technology Guangzhou 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi","family":"Dang","sequence":"additional","affiliation":[{"name":"School of Environment and Energy, South China Univ. of Technology Guangzhou 510006 China"},{"name":"The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education, South China Univ. of Technology Guangzhou 510006 China"},{"name":"Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal South China Univ. of Technology Guangzhou 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,9]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0304-386X(00)00059-1"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.gca.2006.06.1367"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1006\/jcis.1997.5116"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.gca.2013.05.029"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.2134\/jeq1979.00472425000800010008x"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0032-9592(02)00169-3"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/es902803u"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1021\/es4043275"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/1010-6030(89)87045-5"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/es902461x"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.gca.2008.06.019"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1021\/es305283k"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1021\/es505666w"},{"key":"e_1_2_8_15_1","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1016\/j.jcrysgro.2015.01.011","article-title":"Crystallization of jarosite in the presence of amino acids","volume":"416","author":"Crabbe H.","year":"2015","journal-title":"J. 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