文献类型：期刊文献

英文题名：Magnetically recoverable mesoporous melamine-formaldehyde nanoparticles as an efficient adsorbent for hexavalent chromium removal

作者：Lv, Zhongfei[1];Zhao, Dandan[2];Liang, Changsheng[1];Cui, Jiayang[1];Cai, Yangben[1];Xu, Shiai[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Key Lab Ultra Fine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Chem & Mol Engn, Chem Expt Ctr, Shanghai 200237, Peoples R China

年份：2015

卷号：5

期号：102

起止页码：83788

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20154201392905);WOS:【SCI-EXPANDED(收录号:WOS:000362752400030)】；

基金：This work is supported by the National Natural Science Foundation of China (No. 51463020) and the Fundamental Research Funds for the Central Universities (WD1315012).

语种：英文

外文关键词：Chemicals removal (water treatment) - Saturation magnetization - Sodium hydroxide - Metal nanoparticles - Chromium compounds - Nanomagnetics - Formaldehyde - Heavy metals - Pore size - Metal ions - Water quality

摘要：Functional porous nanoparticles have been considered as potential adsorbents for chromium (Cr) removal due to their unique properties such as high surface area, nanosized structure and specific affinity for heavy metal ions. Among these adsorbents, magnetic supports are one of the most efficient adsorbents for their unique advantages of easy separation under external magnetic fields. In this study, magnetic mesoporous melamine-formaldehyde (MMMF) nanoparticles with high surface area (393 m(2) g(-1)), uniform pore sizes (6.9 nm), and relatively high saturation magnetization (4.3 emu per g) have been prepared. These MMMF nanoparticles are highly effective in removing toxic hexavalent chromium (Cr(VI)) from water within 5 to 10 min. More importantly, they can be easily regenerated by a simple basic treatment (0.1 M NaOH) and reused at least five times. The effects of initial Cr(VI) concentration, temperature and pH on the adsorption properties of MMMF are also investigated. The superior adsorption properties of MMMF make them an attractive adsorbent for water quality purification and improvement.