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Here, a sulfide (S)-modified attapulgite (ATP)-supported nanoscale nZVI composite (S-nZVI@ATP) was rapidly synthesized under acidic conditions and used to alleviate Cd2+ toxicity from an aqueous solution. The degree of oxidation of S-nZVI@ATP was less than that of nZVI@ATP, indicating that the sulfide modification significantly reduced the oxidation of nZVI. The optimal loading ratio was at an S-to-Fe molar ratio of 0.75, and the adsorption performance of S-nZVI@ATP for Cd2+ was significantly improved compared with that of nZVI@ATP. The removal of Cd2+ by S-nZVI@ATP was 100% when the adsorbent addition was 1 g\/L, the solution was 30 mL, and the adsorption was performed at 25 \u00b0C for 24 h with an initial Cd2+ concentration of 100 mg\/L. Kinetics studies showed that the adsorption process of Cd followed the pseudo-second-order model, indicating that chemisorption was the dominant adsorption mechanism. The adsorption of Cd2+ by S-nZVI @ATP is dominated by the complexation between the iron oxide or iron hydroxide shell of S-nZVI and Cd2+ and the formation of Cd(OH)2 and CdS precipitates.<\/jats:p>","DOI":"10.2166\/wst.2022.394","type":"journal-article","created":{"date-parts":[[2022,12,3]],"date-time":"2022-12-03T03:28:09Z","timestamp":1670038089000},"page":"3163-3180","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":8,"title":["Insights into enhanced removal of Cd2+ from aqueous solutions by attapulgite supported sulfide-modified nanoscale zero-valent iron"],"prefix":"10.2166","volume":"86","author":[{"given":"Jun","family":"Ren","sequence":"first","affiliation":[{"name":"a Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China"},{"name":"b School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China"},{"name":"c Gansu Hanxing Environmental Protection Co., Ltd., Lanzhou 730070, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gui","family":"Ma","sequence":"additional","affiliation":[{"name":"a Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China"},{"name":"b School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China"},{"name":"d College of Chemistry and Chemical Engineering, Ningxia Normal University, Guyuan 756000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weifan","family":"Zhao","sequence":"additional","affiliation":[{"name":"a Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ling","family":"Tao","sequence":"additional","affiliation":[{"name":"a Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China"},{"name":"b School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China"},{"name":"c Gansu Hanxing Environmental Protection Co., Ltd., Lanzhou 730070, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yue","family":"Zhou","sequence":"additional","affiliation":[{"name":"d College of Chemistry and Chemical Engineering, Ningxia Normal University, Guyuan 756000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Caiyun","family":"Liao","sequence":"additional","affiliation":[{"name":"d College of Chemistry and Chemical Engineering, Ningxia Normal University, Guyuan 756000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xia","family":"Tian","sequence":"additional","affiliation":[{"name":"d College of Chemistry and Chemical Engineering, Ningxia Normal University, Guyuan 756000, 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