Abstract
Soil is widely used as adsorbent for removing toxic pollutants from their aqueous solutions due to its wide availability and cost efficiency. This study investigates the potential of soil and soil composites for removal of crystal violet (CV) dye from solution on a comparative scale. Optimisation of different process parameters was carried out using a novel approach of response surface methodology (RSM) and a central composite design (CCD) was used for determining the optimum experimental conditions, as well as the result of their interactions. Around 99.85 % removal of CV was obtained at initial pH 6.4, which further increased to 99.98 % on using soil and cement composite proving it to be the best admixture of those selected. The phenomenon was found to be represented best by the Langmuir isotherm at different temperatures. The process followed the pseudo-second-order kinetic model and was determined to be spontaneous chemisorption in nature. This adsorbent can hence be suggested as an appropriate liner material for the removal of CV dye.
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Acknowledgements
The authors express their gratitude to the Department of Science and Technology, India for sanctioning the financial support under SERB-DST-Fast Track Young Scientist (Ref: SR/FTP/ETA-083/2011) towards successful execution of this research work.
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Das, P., Banerjee, P. & Mondal, S. Mathematical modelling and optimization of synthetic textile dye removal using soil composites as highly competent liner material. Environ Sci Pollut Res 22, 1318–1328 (2015). https://doi.org/10.1007/s11356-014-3419-1
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DOI: https://doi.org/10.1007/s11356-014-3419-1