Water treatment system using a magnetic confinement method

A method for removing contaminant from a feed solution using a hollow fiber membrane chemical reactor (HF-MCR), the HF-MCR comprising a filtration zone, a catalysis zone, and a hollow fiber membrane (HFM) disposed across the filtration zone and the catalysis zone, the method comprising:

• injecting, by a first pump, a ZVI suspension comprising zerovalent iron (ZVI) to the HFM for forming a plurality of microwires comprising ZVI nanoparticles by a magnetic field in a lumen of the catalysis zone as a magnetic catalyst;
• injecting, by a second pump, an oxidant solution to the HFM;
• injecting, by a third pump, the feed solution to a filtration chamber of the filtration zone;
• establishing a fluid communication of the feed solution from the filtration chamber to the HFM under an outside-in mode to mix with the oxidant solution;
• and
• activating the oxidant solution in the catalysis zone by the plurality of microwires to enable catalytic degradation and chemical immobilization of the contaminant from the feed solution.

A system for removing arsenic (As) from a feed solution, the system comprising:

• a magnetic confinement-enabled column reactor (MCCR) being a flow-through reactor, comprising:
• one or more column filters oriented along a vertical direction, wherein each of the one or more column filters is filled with microscale zerovalent iron (ZVI);
• and
• a magnetic field generator arranged to produce a magnetic field around the one or more column filters for realizing a magnetically confined zone that results in a formation of a plurality of ZVI wires comprising ZVI microparticles within the one or more column filters for reducing aqueous As (Asaq) concentration in the feed solution after the feed solution is pumped through the one or more column filters;
• and
• an ultrasonic generator coupled to the one or more column filters and capable of periodically applying ultrasonic energy to the plurality of ZVI wires to sustain reactivity.

A method for removing arsenic (As) from a feed solution using a magnetic confinement-enabled column reactor (MCCR), the MCCR comprising one or more column filters vertically arranged and a magnetic field generator, the method comprising:

• loading zerovalent iron (ZVI) microparticles to the MCCR by filling the one or more column filters with microscale ZVI, wherein the magnetic field generator induces a magnetic field around the one or more column filters for realizing a magnetically confined zone that results in a formation of a plurality of ZVI wires comprising the ZVI microparticles within the one or more column filters;
• injecting, by a peristaltic pump, the feed solution into the one or more column filters in a bottom-up flow direction;
• and
• activating, from time to time, an ultrasonic generator to apply ultrasonic energy to the plurality of ZVI wires to sustain reactivity.