Zero-valent iron particles embedded on the mesoporous silica–carbon for chromium (VI) removal from aqueous solution

  • Kun Xiong
  • Yuan Gao
  • Lin Zhou
  • Xianming Zhang
Research Paper


Nanoscale zero-valent iron (nZVI) particles were embedded on the walls of mesoporous silica–carbon (MSC) under the conditions of high-temperature carbonization and reduction and used to remove chromium (VI) from aqueous solution. The structure and textural properties of nZVI–MSC were characterized by the powder X-ray diffraction, transmission electron microscopy and N2 adsorption and desorption. The results show that nZVI–MSC has highly ordered mesoporous structure and large surface area, indistinguishable with that of MSC. Compared with the support MSC and iron particles supported on the activated carbon (nZVI/AC), nZVI–MSC exhibited much higher Cr(VI) removal efficiency with about 98 %. The removal process obeys a pseudo first-order model. Such excellent performance of nZVI–MSC could be ascribed to the large surface and iron particles embedded on the walls of the MSC, forming an intimate contact with the MSC. It is proposed that this feature might create certain micro-electrode on the interface of iron particles and MSC, which prevented the formation of metal oxide on the surface and provided fresh Fe surface for Cr(VI) removal.


Zero-valent iron Mesoporous silica–carbon Embedded Chromium Environment Remediation 



This work was financially sponsored by the National Natural Science Foundation of China (Grant No.: 21606028), by the Science and Technology Project from Chongqing Education Commission (KJ1500625, KJZH14210) and by the Scientific Research Foundation of Chongqing Technology and Business University (2016-56-03).


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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education, Chongqing Key Laboratory of Catalysis & Environmental New MaterialsChongqing Technology and Business UniversityChongqingChina
  2. 2.Chengdu Radio and TV UniversityChengduChina

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