| Literature DB >> 26999751 |
Yi Lu1, Bin Jiang2, Liang Fang3, Faling Ling4, Jiemei Gao4, Fang Wu5, Xihua Zhang6.
Abstract
The NiFe layered double hydroxides (LDHs) with different mole ratio of Ni/Fe (4:1, 3:1, 7:3 and 1:1) were prepared by a simple coprecipitation method. The adsorption performance were evaluated by the removal of methyl orange (MO) dye and hexavalent chromium(VI) heavy metal ion. It is found that Ni4Fe1-LDH can remove more than 92% of MO in 10 min at the 10 mg/L MO initial concentration, and 97% of Cr(VI) in 1 h at 4 mg/L Cr2O7(2-) initial concentration. The saturated adsorption capacity of Ni4Fe1-LDH is found to be as large as 205.76 mg/g for MO and 26.78 mg/g for Cr(VI). The adsorption behavior of this new adsorbent is fitted well with Langmuir isotherm and the pseudo-second-order kinetic model, indicative of a monolayer and chemical adsorption that synergistically originates from exchangeable anions mechanism and layer charge density. Due to the excellent removal capacity of MO and Cr(VI), the NiFe-LDHs could be a promising adsorbent for wastewater treatment.Entities:
Keywords: Anions exchange; Charge density; Cr(VI); Methyl orange (MO); NiFe-LDH
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Year: 2016 PMID： 26999751 DOI： 10.1016/j.chemosphere.2016.03.015
Source DB: PubMed Journal: Chemosphere ISSN： 0045-6535 Impact factor: 7.086