Symbols
$\mathrm{A}$	Membrane area (${\mathrm{m}}^2$)
${\mathrm{C}}_{\mathrm{f}}$	Initial feed concentration ($\mathrm{ppm}$)
${\mathrm{C}}_{\mathrm{p}}$	Permeate concentration ($\mathrm{ppm})$
$\mathrm{J}$	Permeate flux ($\mathrm{kg}/({\mathrm{m}}^2·\mathrm{hr})$)
${\mathrm{K}}_1$	Pseudo-first-order rate constant (${\min }^{-1}$)
${\mathrm{K}}_2$	Pseudo-second-order rate constant $\left(\mathrm{g}/\left(\mathrm{mg}.\min \right)\right)$
$\mathrm{Mw}$	Molecular weight ($\mathrm{g}/\mathrm{mol}$)
$\mathrm{m}$	Permeate mass ($\mathrm{kg}$)
${\mathrm{q}}_{\mathrm{c}}$	Calculated adsorption capacity $\left(\mathrm{mg}/\mathrm{g}\right)$
${\mathrm{q}}_{\mathrm{e}}$	Equilibrium adsorption capacity $\left(\mathrm{mg}/\mathrm{g}\right)$
${\mathrm{q}}_{\mathrm{t}}$	Adsorption capacity at time $\mathrm{t}$ $\left(\mathrm{mg}/\mathrm{g}\right)$
${\mathrm{R}}^2$	Correlation coefficient
$\mathrm{t}$	Sampling time ($\mathrm{hr}$)
Greek letters
$\mathsf{\eta }$	Dye removal efficiency ($\%$)
Abbreviations
$\mathrm{Ag}$	Silver
$\mathrm{AGMD}$	Air Gap Membrane distillation
$\mathrm{APTES}$	Aminopropyltriethoxysilane
$\mathrm{CdS}$	Cadmium Sulfide
${\mathrm{CeO}}_2$	Cerium Dioxide
$\mathrm{DCMD}$	Direct Contact Membrane Distillation
$\mathrm{DMAc}$	N-Dimethyl Acetamide
$\mathrm{DMAc}-\mathrm{SDS}-\mathrm{GO}$	Dimethyl Acetamide-Sodium Dodecyl Sulphate-Graphene Oxide
${\mathrm{Fe}}_2{\mathrm{O}}_3$	Ferric Oxide
$\mathrm{FTIR}$	Fourier Transform Infrared Spectrometer
$\mathrm{KCl}$	Potassium Chloride
$\mathrm{KOH}$	Potassium Hydroxide
MB	Methylene Blue
MD	Membrane Distillation
$\mathrm{MWCNTs}$	Multi-Walled Carbon Nanotubes
$\mathrm{NIPS}$	Non-solvent Induced Phase Separation
$\mathrm{PMMA}$	Poly-methyl Methacrylate
$\mathrm{PMR}$	Photocatalytic Membrane Reactors
$\mathrm{PVDF}$	Poly-Vinylidene Flouride
$\mathrm{PVP}$	Poly-Vinyl Propylene
$\mathrm{SEM}$	Scanning Electron Microscope
$\mathrm{SGMD}$	Sweep Gas Membrane Distillation
${\mathrm{TiO}}_2$	Titanium Dioxide
$\mathrm{TrFE}$	Trifluoro Ethylene
$\mathrm{UV}$	Ultraviolet
$\mathrm{VMD}$	Vacuum Membrane Distillation
${\mathrm{V}}_2{\mathrm{O}}_5$	Vanadium Oxide
${\mathrm{WO}}_3$	Tungsten Trioxide
$\mathrm{XRD}$	X-Ray Diffraction
$\mathrm{ZnO}$	Zinc Oxide
ZnS	Zinc Sulfide
${\mathrm{ZrO}}_2$	Zirconium Dioxide