• 1 September 2026

Environmental Water Sample Degradation Data Report

170 cm²Actual Anode Area
8 AApplied Current
80%Duty Cycle
4000 HzPulse Frequency

1. Experimental Principle

This experiment uses the principle of electrochemical catalytic oxidation. It uses the BDD electrode as the main reaction device to finally convert the organic matter in the water sample into CO2 and H2O, nitrate nitrogen and ammonia nitrogen into nitrogen.

2. Electrode Configuration

ComponentSpecificationDetail
Anode2 BDD electrodesSingle-crystal silicon substrate, surface area 200 cm² per plate
Cathode3 titanium sheets—
Plate spacing3 mm—

3. Experimental Operation

STEP 01

Sample. Take 1 L of the water sample in the beaker.

STEP 02

Setup. Put the sample into the BDD electrode module (the actual anode area is 170 cm², plate spacing 3 mm).

STEP 03

Energize. Connect the power supply, adjust the current intensity to 8 A, the duty cycle to 80%, the frequency to 4000 Hz, and the degradation begins.

STEP 04

Monitor. During the degradation process, stir the water sample with a magnetic stirrer to make it uniform. Take samples at regular intervals, record current and voltage values, and measure temperature and pH.

4. Experimental Phenomenon

BDD electrode module in 1L water sample at 0 minutes
Picture 1 — water sample at 0 min degradation (before electrolysis)
Water sample at 60 minutes of BDD electrolysis
Picture 2 — water sample at 60 min degradation (intermediate color deepened)
Water sample at 120 minutes of BDD electrolysis
Picture 3 — water sample at 120 min degradation (color gradually fading)
Water sample at 180 minutes of BDD electrolysis
Picture 4 — water sample at 180 min degradation (water clarified again)
Experimental data table: time, volume, current, anode area, current density, COD, TN, NH3-N, Cl- at 0/60/120/180 min
Recorded data at 0, 60, 120 and 180 min — current density, COD, NH₃-N, TN and Cl⁻

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