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The results showed that the adsorbent used T\u2009=\u2009273.15\u00a0K, pH\u2009=\u200910, t\u2009=\u20091200\u00a0min, C<jats:sub>0<\/jats:sub>\u2009=\u2009100\u00a0mg\/L, had a removal rate of Cr(VI) of more than 80%, and the adsorption capacity could reach 393.79\u00a0mg\/g. The characterization results show that the synthesized mesoporous nitrogen-doped composite material has a large specific surface area and mesoporous structure, and the surface of the material is rich in oxygen-containing functional groups and active sites. Compared with other studies, the adsorption capacity of the material is larger, which indicates that the removal effect of Cr(VI) in this study is better. The adsorption kinetic results show that the adsorption follows a pseudo second kinetic model, and the adsorption process is a chemisorption involving electron sharing or electron exchange. This experiment designed a simple method to synthesize mesoporous nitrogen-doped composites using industrial solid waste, with raw materials from cheap and easily available industrial solid waste, and solved the dual problems of heavy metals in wastewater and solid waste, providing a new idea for the resource utilization of Fenton sludge while not producing secondary pollution.<\/jats:p>","DOI":"10.1038\/s41598-023-27414-9","type":"journal-article","created":{"date-parts":[[2023,1,4]],"date-time":"2023-01-04T11:15:26Z","timestamp":1672830926000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Study on adsorption of hexavalent chromium by composite material prepared from iron-based solid wastes"],"prefix":"10.1038","volume":"13","author":[{"given":"Jiamin","family":"Qi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bin","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pengxiang","family":"Zhou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xintai","family":"Su","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Di","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinxiong","family":"Wu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zixuan","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiangjing","family":"Liang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,1,4]]},"reference":[{"issue":"20","key":"27414_CR1","doi-asserted-by":"publisher","first-page":"125657","DOI":"10.1016\/j.colsurfa.2020.125657","volume":"609","author":"R Zambare","year":"2021","unstructured":"Zambare, R. & Nemade, P. 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