Mg–Al layered double hydroxides modified clay adsorbents for efficient removal of Pb 2+ , Cu 2+ and Ni 2+ from water
Source abstract
Abstract
Abstract Highly effective clay adsorbents of Mg–Al layered double hydroxides modified palygorskite were prepared from the mixture of metal salts, urea and palygorskite by the in situ hydrothermal crystallization method. The obtained adsorbents were characterized by FT-IR, TG, XRD and SEM/EDS. The adsorption performances were evaluated for the removal of Pb 2 + , Cu 2 + and Ni 2 + in the aqueous solution. The adsorption capacities of the three metal cations at variable pH, contact times and metal concentrations were determined by atomic adsorption spectrometry. The adsorption capacities of the three metal cations on Mg–Al layered double hydroxides modified palygorskite were higher than those of palygorskite and Mg–Al layered double hydroxides at the initial metal ion concentration of 100 mg/L and initial pH of 5.0. The experimental data showed a good compliance with the Langmuir isotherm and the pseudo-second-order kinetic model. Taking advantage of the combined benefits of palygorskite and Mg–Al layered double hydroxides, the as-prepared adsorbents exhibit selective and fast rating adsorption for Pb 2 + .
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Adsorption and biosorption for pollutant removal · Chemical Synthesis and Characterization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (41)
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