Investigation of reverse ionic diffusion in forward-osmosis-aided dewatering of microalgae: A molecular dynamics study

Authors

Jester N. Itliong, De La Salle University, Manila
Al Rey C. Villagracia, De La Salle University, Manila
Joaquin Lorenzo V. Moreno, De La Salle University, Manila
Kurt Irvin M. Rojas, De La Salle University, Manila
Gian Paolo O. Bernardo, De La Salle University, Manila
Melanie Y. David, De La Salle University, Manila
Robby B. Manrique, De La Salle University, Manila
Aristotle T. Ubando, De La Salle University, Manila
Alvin B. Culaba, De La Salle University, Manila
Allan Abraham B. Padama, University of the Philippines Los Banos
Hui Lin Ong, Universiti Malaysia Perlis
Jo Shu Chang, National Cheng Kung University
Wei Hsin Chen, National Cheng Kung University
Hideaki Kasai, National Institute of Technology
Nelson B. Arboleda, De La Salle University, Manila

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

Bioresource Technology

Volume

279

First Page

181

Last Page

188

Publication Date

5-1-2019

Abstract

This study aimed to investigate the transport mechanisms of ions during forward-osmosis-driven (FO-driven) dewatering of microalgae using molecular dynamics (MD) simulations. The dynamical and structural properties of ions in FO systems of varying NaCl or MgCl2 draw solution (DS) concentrations were calculated and correlated. Results indicate that FO systems with higher DS concentration caused ions to have lower hydration numbers and higher coordination numbers leading to lower diffusion coefficients. The higher hydration number of Mg2+ ions resulted in significantly lower ionic permeability as compared to Na+ ions at all concentrations (p = 0.002). The simulations also revealed that higher DS concentrations led to higher accumulation of ions in the membrane. This study provides insights on the proper selection of DS for FO systems. © 2019 Elsevier Ltd

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Digitial Object Identifier (DOI)

10.1016/j.biortech.2019.01.109

Recommended Citation

Itliong, J. N., Villagracia, A. C., Moreno, J. V., Rojas, K. M., Bernardo, G. O., David, M. Y., Manrique, R., Ubando, A. T., Culaba, A. B., Padama, A. B., Ong, H., Chang, J., Chen, W., Kasai, H., & Arboleda, N. B. (2019). Investigation of reverse ionic diffusion in forward-osmosis-aided dewatering of microalgae: A molecular dynamics study. Bioresource Technology, 279, 181-188. https://doi.org/10.1016/j.biortech.2019.01.109

Disciplines

Atomic, Molecular and Optical Physics | Physics

Keywords

Microalgae—Dewatering; Separation (Technology); Molecular dynamics

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