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AssigneeKing Fahd University of Petroleum and Minerals
InventorsNadeem BAIG, Asif MATIN, Irshad AHMAD, Safyan Akram KHAN
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A membrane includes a polysulfone-based support, a polydopamine (PDA) layer disposed on a surface of the polysulfone-based support, and a silver/polydopamine (Ag/PDA) composite layer disposed on a surface of the polydopamine layer. The polysulfone-based support has a pore size of up to 600 nanometers (nm). The Ag/PDA composite layer contains core-shell structure particles and spherical particles. The core-shell structure particles have a silver nanoparticle core and a polydopamine shell. The spherical particles are silver-decorated polydopamine particles. The membrane can at least partially separate an Erichrome Black T (EBT) dye from an EBT dye/salt containing mixture by rejecting the EBT dye and allowing the EBT dye/salt containing mixture to pass through the membrane.
(canceled)
The method of claim 19, wherein the separation membrane has a pore size in a range of 3 to 8 nm.
The method of claim 19, wherein the polysulfone support comprises at least one polymer selected from the group consisting of a polysulfone, a polyethersulfone, and a polyarylethersulfone.
The method of claim 19, wherein the core-shell structure particles and the silver-decorated polydopamine particles are uniformly disposed on the surface of the polydopamine layer.
The method of claim 19, wherein the silver-decorated polydopamine particles have a particle size in a range of 50 to 900 nm.
The method of claim 19, wherein the silver-decorated polydopamine particles are decorated with Ag nanoparticles immobilized on a surface of the spherical particles.
The method of claim 19, wherein the separation membrane has a contact angle of 20 to 30 degrees (°).
The method of claim 19, wherein the separation membrane has a permeate flux of 30 to 50 liters per square meter per hour per bar (L m−2 h−1 bar−1).
The method of claim 19, wherein the separation membrane has an average surface roughness (Ra) of 30 to 80 nm.
The method of claim 19, wherein the separation membrane has an enhanced anti-fouling properties compared to a polysulfone only membrane as determined by bovine serum albumin (BSA) test.
12-18. (canceled)
A water treatment method, comprising:
Dependencies are inferred from the claim text.