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Adsorptive removal of Cd2+ ions using dolochar at an industrial-scale process optimization by response surface methodology

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Abstract

In this work, performance of laboratory-synthesized dolochar has been investigated for adsorption of Cd2+ ions in a large-scale process with the application of Aspen Adsorption. Moreover, the optimum values of the operating parameters (namely, flow rate, bed height, and inlet metal ion concentration) that would result into maximum amount of cadmium ion adsorption (high exhaustion capacity) in minimum time (less exhaustion time) for a fixed mass of dolochar have been calculated via the application of response surface methodology. It was found that, at optimum values of bed height (3.48 m), flow rate (76.31 m3/day), and inlet concentration (10 ppm), the optimized value of exhaustion capacity and exhaustion time for cadmium ion adsorption in dolochar packed bed is equal to 1.85 mg/g and 11.39 h, respectively. The validity of these simulation experiments can be proven by the fact that the obtained exhaustion capacity of dolochar packed bed always remained in close proximity of the experimentally obtained value of adsorption capacity of the dolochar in batch process mode (equal to 2.1 mg/g).

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Acknowledgements

The authors would like to thank BITS Pilani Hyderabad Campus and HBL Power Systems for facilitating this project. To be presented in the International Chemical Engineering Conference on “100 Glorious Years of Chemical Engineering & Technology” from September 17 to 19, 2021, organized by Department of Chemical Engineering at Dr. B R Ambedkar NIT Jalandhar, Punjab, India (organizing chairman: Dr. Raj Kumar Arya and organizing secretary: Dr. Anurag Kumar Tiwari).

Funding

This study received funding from CSIR under the scheme 22(0783)/19/EMR-II (recipient: I. Sreedhar).

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UU: simulation studies and drafting.

SG: experimental validation.

AA: adsorbent synthesis.

IS: project mentoring and monitoring.

KLA: characterization of effluent.

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Correspondence to Inkollu Sreedhar.

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The authors declare no competing interests.

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Upadhyay, U., Gupta, S., Agarwal, A. et al. Adsorptive removal of Cd2+ ions using dolochar at an industrial-scale process optimization by response surface methodology. Environ Sci Pollut Res 30, 8403–8415 (2023). https://doi.org/10.1007/s11356-021-17216-9

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  • DOI: https://doi.org/10.1007/s11356-021-17216-9

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