Quantity   Component name
1 × ABS filiment for 3D printer Used for printing the pH gradient flow cell and MnO2 ink
1 × Carbon Fabric Used for making the electrodes in the pH gradient flow cell and bipolar membrane flow cell
1 × Celgard 3501 nonselective membrane Used in pH gradient flow cell and bipolar membrane flow cell
1 × Manganese Dioxide Used in electrode ink
1 × Carbon black Used in electrode ink
5 × Sealable glass containers Used for storage and measurement of solutions
1 × Silicone Used for sealing pH gradient flow cell
1 × Superglue Used to seal electrodes
1 × Dish soap Used to prep electrodes in pH gradient flow cell
1 × Sodium Hydroxide Used in pH flow cell solution and preparing bipolar membranes
1 × FAA-3-PK-130 anion membrane Other anion membranes can be substituted
1 × Fumasep® F-1030 cation exchange membrane Other cation exchange membranes can be substituted
1 × Ammonium Chloride Solution .001M Can be made yourself or purchased (optional)
1 × Sodium Chloride Solution .001M Can be made yourself or purchased (optional)
1 × Urea Borate Solution .001M Can be made yourself or purchased
1 × Urea Monochloride Solution .001M Can be made yourself or purchased (optional)
1 × Paraffin Wax Used in parts 2 and 3
1 × Deionized Water Used in parts 2 and 3
5 × Nylon Bolts 3M 25mm 5 for each bipolar membrane flow cell
1 × Clear PETG Used in printing components
1 × Parafilm Recommended for covering solutions when not in use (optional)
1 × pH Meter We used a Hanna professional foodcare portable pH meter
1 × Ammonia tester We used a Hanna ammonia colorimeter
1 × Chloride tester We used a Hanna chloride colorimeter
1 × Manganese tester We used a Hanna manganese colorimeter
1 × 3D Printer We used a Prusa i3 MK3 printer
1 × Multimeter We used a Keithley DMM6500 multimeter