%0 Journal Article
%T Novel Carbon [email protected] Silicate Composite Porous Films: Design, Fabrication, and Adsorption Behavior for Heavy Metal Ions in Aqueous Solution
%J -
%D 2018
%R https://doi.org/10.1021/acsami.8b01557
%X It is of great and increasing interest to explore porous adsorption films to reduce heavy metal ions in aqueous solution. Here, we for the first time fabricated carbon [email protected] silicate ([email protected]) composite films for the high-efficiency removal of Zn2+ and Cu2+ by a solid-phase transformation from hydromagnesite-coated CP ([email protected]) precursor film in a hydrothermal route and detailedly examined adsorption process for Zn2+ and Cu2+ as well as the adsorption mechanism. The suitable initial pH range is beyond 4.0 for the adsorption of the [email protected] to remove Zn2+ under the investigated conditions, and the adsorption capacity is mainly up to the pore size of the porous film. The composite film exhibits excellent adsorption capacity for both of Zn2+ and Cu2+ with the corresponding maximum adsorption quantity of 198.0 mg g¨C1 for Zn2+ and 113.5 mg g¨C1 for Cu2+, which are advantageous over most of those reported in the literature. Furthermore, the adsorption behavior of the [email protected] film follows the pseudo-second-order kinetic model and the Langmuir adsorption equation for Zn2+ with the cation-exchange mechanism. Particularly, the [email protected] film shows promising practical applications for the removal of heavy metal ions in water by an adsorption¨Cfiltration system
%U https://pubs.acs.org/doi/10.1021/acsami.8b01557