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Optimization of Delignified Wood Rods for Interfacial Solar Evaporation.

Omar A Kazi1,2, Anthony C Avram1,3, Yuqin Wang1,2

  • 1Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States.

ACS Applied Materials & Interfaces
|May 21, 2025
PubMed
Summary

Optimizing the geometry of suspended biochar-coated delignified wood evaporators enhances solar water evaporation. An optimal exposed height achieved high, stable evaporation rates for water treatment, even with saline solutions.

Keywords:
delignified woodphotothermal materialsresource recoverysolar evaporationwater treatment

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Interfacial solar evaporation utilizes 3D materials for high rates beyond photothermal limits.
  • Optimizing material geometry is crucial for balancing water capillary uptake and evaporation for stable, high rates.

Purpose of the Study:

  • To design and investigate a suspended biochar-coated delignified wood rod evaporator.
  • To analyze the influence of geometric parameters on evaporation performance.

Main Methods:

  • Designed a suspended biochar-coated delignified wood rod evaporator.
  • Investigated the effect of exposed height on evaporation performance under 1-sun illumination.
  • Tested performance in saline solutions up to 5 wt % NaCl.

Main Results:

  • Evaporator exposed height significantly impacts evaporation rate and stability.
  • Shorter evaporators limit surface area, while taller ones hinder capillary uptake.
  • Optimized exposed height achieved 3.05 ± 0.23 kg m⁻² h⁻¹ average hourly evaporation rate.

Conclusions:

  • Geometric optimization of biochar-coated delignified wood is key for efficient solar evaporation.
  • The optimized evaporator demonstrates stable performance in saline water, suitable for water treatment.