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| Synergistic Effect of Mg/Al Metal Oxides on Removal of Mixed Cu2+ and Cr(VI) |
Xiaojun LIU,Mengchen LIAO,Hongyan ZENG( ),Zhiqing ZHANG,Jinze DU,Mengkai ZHENG,Qingjun HUANG,Peihan ZHU |
| School of Chemical Engineering, Xiangtan University, Xiangtan, Hunan 411105, China) |
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Cite this article:
Xiaojun LIU,Mengchen LIAO,Hongyan ZENG,Zhiqing ZHANG,Jinze DU,Mengkai ZHENG,Qingjun HUANG,Peihan ZHU. Synergistic Effect of Mg/Al Metal Oxides on Removal of Mixed Cu2+ and Cr(VI). Chinese Journal of Materials Research, 2015, 29(5): 383-388.
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Abstract Layered double oxide (LDO) as a heavy metal ions removal agent was acquired by calcining Mg-Al containing layered double hydroxide (LDH) and then the performance of the LDO for removal heavy metal ions was assessed in solutions with single Cu2+ or Cr(VI) and with mixture of Cu2+ and Cr(VI). The spent adsorbents were characterized by XRD, FT-IR and SEM to clarify the co-adsorption mechanism of Cr(VI) and Cu2+ on the LDO. The results show that the co-adsorption of Cu2+ and Cr(VI) on the LDO can be ascribed to a synergistic effect of multiple interactions: apart from the “Jahn-Teller” effect of Cu2+ and many-body terms to hydrogen bonds interaction, there may exist effects such as hydration, electrostatic interaction and coordination etc in the system Cu2+-CrO42–-LDO, which enhanced the co-precipitation and subsequent precipitation on the adsorbent surface, therewith, the synergistic effect promoted the formation of Cu2+-CrO42–-LDO hybrids.
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Received: 24 September 2014
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| Fund: *Supported by National Science Foundation of Hunan Province No. 12JJ2008 and Hunan Province University Innovation Platform of Open Fund No. 12K048. |
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