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- W2965697029 abstract "Low-cost mineral silicate sepiolite was calcined at high temperature to increase its heavy metal removal efficiency. Sepiolite calcined at 950â (S950) showed higher adsorption amount of Cd2+, Cu2+, Pb2+ and Ni2+ than that of sepiolite calcined at other temperature. The adsorption characteristics of mixed heavy metals onto S950 were investigated. The kinetic experiment showed that equilibrium adsorption was reached with 5 minutes of reaction. Equilibrium experimental data were better suited to Frendlich model than Langmuir model. The maximum adsorption capacities for Cd2+, Cu2+, Pb2+ and Ni2+ in S950 were 127.69 mg/g, 388.85 mg/g, 131.33 mg/g and 129.51 mg/g, respectively. As a result of the thermodynamic adsorption, the amount of heavy metal adsorption onto S950 increased with increasing reaction temperature. Thermodynamic analysis showed that the heavy metal adsorption onto S950 was endothermic and spontaneous reaction. The increase in ionic strength had a negative effect on the heavy metal adsorption of S950. As the dose of S950 increased, the heavy metal adsorption amount decreased but the total removal percentage of heavy metals increased. The presence of phosphate negatively influenced heavy metal adsorption to S950. Key words: Adsorption, Heavy metal, Ionic strength, Calcination, Sepiolite" @default.
- W2965697029 created "2019-08-13" @default.
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- W2965697029 date "2019-07-31" @default.
- W2965697029 modified "2023-10-15" @default.
- W2965697029 title "Removal of Cd2+, Cu2+, Pb2+, Ni2+ in Aqueous Solution by Thermally Treated Sepiolite" @default.
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- W2965697029 doi "https://doi.org/10.4491/ksee.2019.41.7.372" @default.
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