Synthesis of NH2-functionalized nano-Fe3O4 magnetic polymer adsorbent and its application for the removal of Cr (Ⅵ) from industrial wastewater
(0) In this study, a novel NH2-functionalized nano-sized magnetic polymer (TEPA-NMP) adsorbent coupling with tetraethylenepentamine (TEPA) had been prepared. Its application for the removal of Cr(VI) from industrial wastewater was investigated. Batch adsorption studies were carried out to evaluate the effects of pH value, initial concentration, adsorption isotherm, adsorption kinetics, and desorption characters etc. The adsorption of Cr(VI) reached equilibrium rapidly within 30 mins. The adsorption efficiency of the TEPA-NMP on Cr(VI) was dependent on pH value and the initial Cr(VI) concentration. The adsorption efficiency of Cr(VI) decreased with the increasing of the initial Cr(VI) concentration and pH value. The adsorption data were well fitted with the Langmuir isotherm. The maximum adsorption capacity calculated from the Langmuir isotherm was 370.4 mg/g at temperature of 35 ℃ and pH of 2.0. Regeneration studies indicated that the adsorbent could be reused for 8 times with only 3.4 ％ lost of adsorption efficiency. The adsorption mechanism study results suggested that the adsorption of Cr(VI) could be related with electrostatic attraction, ion exchange and coordination interactions.
NH2-functionalized nano-Fe3O4 magnetic polymer Adsorption Chromium(VI) Wastewater Desorption Regeneration Langmuir isotherm
Yong-Gang ZHAO Hao-Yu SHEN Mei-Qin HU Feng WEI Yun-Jie LUO Qing-Hua XIA
Ningbo Institute of Technology, Zhejiang University Ningbo, 315100, China College of Science, Zhejia Ningbo Institute of Technology, Zhejiang University Ningbo, 315100, China Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecul
国际会议
青岛
英文
1883-1886
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）