A series of novel Fe/Co layered double hydroxides modified with glycine (named as FeCo-LDH@G) were prepared and served as high-performance adsorbents for As (V). With a Fe/Co mole ratio of 1:1, the FeCo-LDH@G adsorbents achieved significant improvements on the adsorption selectivity and capacity for As (V). The As (V) adsorption by FeCo-LDH@G follows Langmuir isotherm model and pseudo-second-order kinetics model. The maximum adsorption capacity is 820 mg g and the equilibrium reaches in 120 min. Under the assistance of electrochemical devices, the FeCo-LDH@G adsorbent was regenerated and the adsorption capacity for As (V) was dropped only about 13.41% in 5 cycles. These excellent performances make FeCo-LDH@G as promising As (V) adsorbents for commercial wastewater treatments.
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| http://dx.doi.org/10.1016/j.chemosphere.2021.130943 | DOI Listing |
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