Although seawater is abundant, desalination is energy intensive and expensive. Using the Sun as an energy source is attractive for desalinating seawater. Although interesting, current passive devices with no moving parts have unsatisfactory performance when operated with an energy flux lower than 1 kW m−2 (one sun). We present a passive multi-stage and low-cost solar distiller, where efficient energy management leads to significant enhancement in freshwater yield. Each unit stage for complete distillation is made of two hydrophilic layers separated by a hydrophobic microporous membrane, with no other mechanical ancillaries. Under realistic conditions, we demonstrate a distillate flow rate of almost 3 l m−2 h−1 from seawater at less than one sun—twice the yield of recent passive complete distillation systems. Theoretical models also suggest that the concept has the potential to further double the observed distillate rate. In perspective, this system may help satisfy the freshwater needs in isolated and impoverished communities in a sustainable way.
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The authors declare that the data supporting the findings of this study are available within the paper and its Supplementary Information files.
Vörösmarty, C. J., Green, P., Salisbury, J. & Lammers, R. B. Global water resources: vulnerability from climate change and population growth. Science 289, 284–288 (2000).
Kelley, C. P., Mohtadi, S., Cane, M. A., Seager, R. & Kushnir, Y. Climate change in the Fertile Crescent and implications of the recent Syrian drought. Proc. Natl Acad. Sci. USA 112, 3241–3246 (2015).
Mekonnen, M. M. & Hoekstra, A. Y. Four billion people facing severe water scarcity. Sci. Adv. 2, e1500323 (2016).
Amy, G. et al. Membrane-based seawater desalination: present and future prospects. Desalination 401, 16–21 (2017).
Ziolkowska, J. R. Desalination leaders in the global market—current trends and future perspectives. Water Sci. Technol. Water Supply 16, 563–578 (2016).
Fasano, M. et al. Interplay between hydrophilicity and surface barriers on water transport in zeolite membranes. Nat. Commun. 7, 12762 (2016).
Ahsan, A., Imteaz, M., Rahman, A., Yusuf, B. & Fukuhara, T. Design, fabrication and performance analysis of an improved solar still. Desalination 292, 105–112 (2012).
Gleick, P. H. Basic water requirements for human activities: meeting basic needs. Water Int. 21, 83–92 (1996).
Service, R. Sunlight-powered purifier could clean water for the impoverished. Science https://doi.org/10.1126/science.aal0699 (2017).
Ghasemi, H. et al. Solar steam generation by heat localization. Nat. Commun. 5, 4449 (2014).
Huang, X., Yu, Y.-H., de Llergo, O. L., Marquez, S. M. & Cheng, Z. Facile polypyrrole thin film coating on polypropylene membrane for efficient solar-driven interfacial water evaporation. RSC Adv. 7, 9495–9499 (2017).
Li, X. et al. Graphene oxide-based efficient and scalable solar desalination under one sun with a confined 2D water path. Proc. Natl Acad. Sci. USA 113, 13953–13958 (2016).
Liu, K.-K. et al. Wood–graphene oxide composite for highly efficient solar steam generation and desalination. ACS Appl. Mater. Interf. 9, 7675–7681 (2017).
Ni, G. et al. Steam generation under one sun enabled by a floating structure with thermal concentration. Nat. Energy 1, 16126 (2016).
Zhou, L. et al. Self-assembly of highly efficient, broadband plasmonic absorbers for solar steam generation. Sci. Adv. 2, e1501227 (2016).
Yang, Y. et al. Graphene-based standalone solar energy converter for water desalination and purification. ACS Nano 12, 829–835 (2018).
Mauter, M. S. et al. The role of nanotechnology in tackling global water challenges. Nat. Sustain. 1, 166–175 (2018).
Liu, Z. et al. Extremely cost-effective and efficient solar vapor generation under nonconcentrated illumination using thermally isolated black paper. Glob. Chall. 1, 1600003 (2017).
Elimelech, M. & Phillip, W. A. The future of seawater desalination: energy, technology, and the environment. Science 333, 712–717 (2011).
Morciano, M. et al. Efficient steam generation by inexpensive narrow gap evaporation device for solar applications. Sci. Rep. 7, 11970 (2017).
Li, T. et al. Scalable and highly efficient mesoporous wood-based solar steam generation device: localized heat, rapid water transport. Adv. Funct. Mater. 28, 1707134 (2018).
Shi, Y. et al. A 3D photothermal structure toward improved energy efficiency in solar steam generation. Joule 2, 1171–1186 (2018).
Li, X. et al. Enhancement of interfacial solar vapor generation by environmental energy. Joule 2, 1331–1338 (2018).
Wang, Y. et al. Improved light-harvesting and thermal management for efficient solar-driven water evaporation using 3D photothermal cones. J. Mater. Chem. A 6, 9874–9881 (2018).
Zhao, F. et al. Highly efficient solar vapour generation via hierarchically nanostructured gels. Nat. Nanotechnol. 13, 489–495 (2018).
Ohshiro, K., Nosoko, T. & Nagata, T. A compact solar still utilizing hydrophobic poly (tetrafluoroethylene) nets for separating neighboring wicks. Desalination 105, 207–217 (1996).
Tanaka, H., Nosoko, T. & Nagata, T. A highly productive basin-type-multiple-effect coupled solar still. Desalination 130, 279–293 (2000).
Tanaka, H. & Iishi, K. Experimental study of a vertical single-effect diffusion solar still coupled with a tilted wick still. Desalination 402, 19–24 (2017).
Fukuia, K., Nosoko, T., Tanaka, H. & Nagata, T. A new maritime lifesaving multiple-effect solar still design. Desalination 160, 271–283 (2004).
UN-Water World Water Assessment Programme: The United Nations World Water Development Report 4: Managing Water Under Uncertainty and Risk (UNESCO, 2012).
Drioli, E., Ali, A. & Macedonio, F. Membrane distillation: recent developments and perspectives. Desalination 356, 56–84 (2015).
Cipollina, A., Di Sparti, M., Tamburini, A. & Micale, G. Development of a membrane distillation module for solar energy seawater desalination. Chem. Eng. Res. Des. 90, 2101–2121 (2012).
La Cerva, M. et al. On some issues in the computational modelling of spacer-filled channels for membrane distillation. Desalination 411, 101–111 (2017).
TINOX Titan-Absorber: The Most Efficient Way of Transforming Sunlight into Heat (ALMECO Group, 2017); https://go.nature.com/2Dy2WQP
Chen, W. et al. High-flux water desalination with interfacial salt sieving effect in nanoporous carbon composite membranes. Nat. Nanotech. 13, 345–350 (2018).
Wang, P. Emerging investigator series: the rise of nano-enabled photothermal materials for water evaporation and clean water production by sunlight. Environ. Sci. Nano 5, 1078–1089 (2018).
Yan, K.-K. et al. Superhydrophobic electrospun nanofiber membrane coated by carbon nanotubes network for membrane distillation. Desalination 437, 26–33 (2018).
Agbaje, T. A., Al-Gharabli, S., Mavukkandy, M. O., Kujawa, J. & Arafat, H. A. PVDF/magnetite blend membranes for enhanced flux and salt rejection in membrane distillation. Desalination 436, 69–80 (2018).
Seo, D. H. et al. Anti-fouling graphene-based membranes for effective water desalination. Nat. Commun. 9, 683 (2018).
Qiu, H., Peng, Y., Ge, L., Hernandez, B. V. & Zhu, Z. Pore channel surface modification for enhancing anti-fouling membrane distillation. Appl. Surf. Sci. 443, 217–226 (2018).
Jhaveri, J. H. & Murthy, Z. A comprehensive review on anti-fouling nanocomposite membranes for pressure driven membrane separation processes. Desalination 379, 137–154 (2016).
Zhao, X. et al. Antifouling membrane surface construction: chemistry plays a critical role. J. Membr. Sci. 551, 145–171 (2018).
Kashyap, V. et al. A flexible anti-clogging graphite film for scalable solar desalination by heat localization. J. Mater. Chem. A 5, 15227–15234 (2017).
Ni, G. W. et al. A salt-rejecting floating solar still for low-cost desalination. Energy Environ. Sci. 11, 1510–1519 (2018).
Xu, W. et al. Flexible and salt resistant Janus absorbers by electrospinning for stable and efficient solar desalination. Adv. Energy Mater. 8, 1702884 (2018).
Hamzah, B. International rules on decommissioning of offshore installations: some observations. Mar. Pol. 27, 339–348 (2003).
Kezia, K., Lee, J., Weeks, M. & Kentish, S. Direct contact membrane distillation for the concentration of saline dairy effluent. Water Res. 81, 167–177 (2015).
Kim, H.-C. et al. Membrane distillation combined with an anaerobic moving bed biofilm reactor for treating municipal wastewater. Water Res. 71, 97–106 (2015).
Nathoo, J. & Randall, D. G. Thermodynamic modelling of a membrane distillation crystallisation process for the treatment of mining wastewater. Water Sci. Technol. 73, 557–563 (2016).
Alkhudhiri, A., Darwish, N. & Hilal, N. Membrane distillation: a comprehensive review. Desalination 287, 2–18 (2012).
Lee, J., Laoui, T. & Karnik, R. Nanofluidic transport governed by the liquid/vapour interface. Nat. Nanotech. 9, 317–323 (2014).
Laganà, F., Barbieri, G. & Drioli, E. Direct contact membrane distillation: modelling and concentration experiments. J. Membr. Sci. 166, 1–11 (2000).
Incropera, F. P. & De Witt, D. P. Fundamentals of Heat and Mass Transfer (John Wiley & Sons, Hoboken, 1985).
Poling, B. E., Prausnitz, J. M. & O’Connell, J. P. The Properties of Gases and Liquids Vol. 5 (Mcgraw-Hill, New York, 2001).
Deshmukh, A. & Elimelech, M. Understanding the impact of membrane properties and transport phenomena on the energetic performance of membrane distillation desalination. J. Membr. Sci. 539, 458–474 (2017).
Lee, J., Straub, A. P. & Elimelech, M. Vapor-gap membranes for highly selective osmotically driven desalination. J. Membr. Sci. 555, 407–417 (2018).
Deshmukh, A. et al. Membrane distillation at the water-energy nexus: limits, opportunities, and challenges. Energy Envir. Sci. 11, 1177–1196 (2018).
Phattaranawik, J., Jiraratananon, R. & Fane, A. Effect of pore size distribution and air flux on mass transport in direct contact membrane distillation. J. Membr. Sci. 215, 75–85 (2003).
Khayet, M. & Matsuura, T. Membrane Distillation: Principles and Applications (Elsevier, Amsterdam, 2011).
Yun, Y., Ma, R., Zhang, W., Fane, A. & Li, J. Direct contact membrane distillation mechanism for high concentration NaCl solutions. Desalination 188, 251–262 (2006).
Mackie, J. & Meares, P. The diffusion of electrolytes in a cation-exchange resin membrane. I. Theoretical. Proc. R. Soc. Lond. A 232, 498–509 (1955).
Mackie, J. & Meares, P. The diffusion of electrolytes in a cation-exchange resin membrane. II. Experimental. Proc. R. Soc. Lond. A 232, 510–518 (1955).
Srisurichan, S., Jiraratananon, R. & Fane, A. Mass transfer mechanisms and transport resistances in direct contact membrane distillation process. J. Membr. Sci. 277, 186–194 (2006).
Schofield, R., Fane, A., Fell, C. & Macoun, R. Factors affecting flux in membrane distillation. Desalination 77, 279–294 (1990).
Lawson, K. W. & Lloyd, D. R. Membrane distillation. J. Membr. Sci. 124, 1–25 (1997).
Straub, A. P., Yip, N. Y., Lin, S., Lee, J. & Elimelech, M. Harvesting low-grade heat energy using thermo-osmotic vapour transport through nanoporous membranes. Nat. Energy 1, 16090 (2016).
Ali, A., Macedonio, F., Drioli, E., Aljlil, S. & Alharbi, O. Experimental and theoretical evaluation of temperature polarization phenomenon in direct contact membrane distillation. Chem. Eng. Res. Des. 91, 1966–1977 (2013).
Moudjeber, D.-E., Ruiz-Aguirre, A., Ugarte-Judge, D., Mahmoudi, H. & Zaragoza, G. Solar desalination by air-gap membrane distillation: a case study from Algeria. Desalin. Water Treat. 57, 22718–22725 (2016).
Dongare, P. D. et al. Nanophotonics-enabled solar membrane distillation for off-grid water purification. Proc. Natl Acad. Sci. USA 114, 6936–6941 (2017).
The authors are grateful to ‘Fondazione CRT—Torino’ under the NANOSTEP project (‘La Ricerca dei Talenti’ call; grant number 911/2015). E.C. acknowledges partial financial support from the Politecnico di Torino through the Starting Grant (grant number 56_RIL16CHE01). The authors also thank M. Bressan and R. Costantino for laboratory support, S. Pezzana (Almeco Group) for providing experimental materials, and P. Ornolio and the Marina di Varazze and Lega Navale Varazze institutions for hosting field tests of the floating distiller. In particular, we acknowledge L. Molin Pradel (Marina di Varazze) for generous hospitality. This work was performed under the auspices of the CleanWaterCenter@PoliTo (http://cleanwater.polito.it/).
The authors declare no competing interests.
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Supplementary Notes 1–5, Supplementary Figures 1–17, Supplementary Tables 1–4, Supplementary references 1–43.
Raw data on distillate flow rates from lab, rooftop and sea experiments on 1-stage, 3-stage, and 10-stage distillers using either no membrane, 0.1 μm membrane or 3.0 μm membrane.
Raw data on temperatures and irradiance from lab, rooftop, and sea experiments on 1-stage, 3-stage, and 10-stage distillers using either no membrane, 0.1 μm membrane, or 3.0 μm membrane.
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Chiavazzo, E., Morciano, M., Viglino, F. et al. Passive solar high-yield seawater desalination by modular and low-cost distillation. Nat Sustain 1, 763–772 (2018). https://doi.org/10.1038/s41893-018-0186-x
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