Abstract
The adsorption dynamics of inorganic mercury, Hg(II) and organic methylmercury, MeHg(II) removal by low-cost reactive agrowaste adsorbents namely CP-Pure, CP-MPTES and CP-RR was investigated in a fixed-bed adsorber. The results show that the breakthrough and saturation times were delayed with decreasing flow rate (F) and initial concentration (Co), and increasing bed height (Z). The Hg(II) possessed better adsorption performance than MeHg(II). The isotherm and kinetic model analyses of adsorption data followed the Temkin isotherm and the pseudosecond order kinetic models, respectively. The breakthrough curve was simulated well by the Thomas and Yoon-Nelson models, and then was further used for scale-up studies. The empty bed contact time (EBCT) concept was successfully demonstrated for the adsorber design and scale-up studies. The regeneration studies showed that the regenerated CP-Pure and CP-MPTES have a high regeneration efficiency up to third adsorption cycle.
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Acknowledgements
The financial support from the Universiti Teknologi Malaysia for Research University Grant (GUP 15H77) and Postdoctoral Fellowship Scheme (PDRU 04E29 and PDRU 03E92) awarded to Norasikin Saman and Safia Syazana Mohtar and the Ministry of Higher Education (MOHE) Malaysia for MyBrain15 scholarship are gratefully acknowledged.
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A comparative study on dynamic Hg(II) and MeHg(II) removal by functionalized agrowaste adsorbent: breakthrough analysis and adsorber design
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Saman, N., Kong, H., Mohtar, S.S. et al. A comparative study on dynamic Hg(II) and MeHg(II) removal by functionalized agrowaste adsorbent: breakthrough analysis and adsorber design. Korean J. Chem. Eng. 36, 1069–1081 (2019). https://doi.org/10.1007/s11814-019-0285-z
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DOI: https://doi.org/10.1007/s11814-019-0285-z