2026-10-29

Photodegradation Evaluation: Devices and Methods for Pollutant Degradation | Perfectlight

1. The Indicator System of Photodegradation Evaluation

Indicator	What It Tells You
Removal rate	Extent of pollutant depletion
Rate constant (pseudo-1st/2nd)	Degradation kinetics
Mineralization	True oxidation to CO2

Photocatalytic degradation focuses on the target pollutant's removal rate, degradation rate constant (pseudo-first/pseudo-second order), and mineralization. Evaluation must track concentration over time under stable irradiation, controlled concentration, and sufficient mixing.

2. Device Selection

For small-to-medium scale, the PLS-P8 Rotary Photochemical Reactor or the PLS-P12 Rotary Photochemical Reactor work well, with multi-tube rotation ensuring even illumination; for catalyst or condition cross-evaluation, the PCX-50C Discover Multi-Channel Photocatalytic Reaction System can run multiple degradation experiments in parallel.

3. Analysis Methods

Track concentration by UV-Vis spectrophotometry or HPLC;
Confirm mineralization by TOC analyzer to verify true oxidation to CO2;
Identify intermediates by LC-MS rather than relying only on parent-removal rate.

4. Reproducibility and Pitfalls

Run a dark control each time to confirm the adsorption contribution;
Calibrate source decay periodically to avoid false "activity drops";
Run catalyst-recovery experiments to verify reusability.

Free consultation: Unstable, poorly reproducible photodegradation data? Perfectlight's PLS-series rotary and PCX-50C multi-channel photochemical reactors make even illumination and parallel controls standard. Contact Perfectlight for a reliable setup.

Tel: 400-1161-365 / 010-62128921　Perfectlight Official Website

Frequently Asked Questions (FAQ)

What indicators matter in photodegradation evaluation?

Removal rate, degradation rate constant (pseudo-first/pseudo-second order), and mineralization—tracked over time under stable irradiation and good mixing.

Which device should I choose?

Use PLS-P8/P12 rotary reactors for small-to-medium scale, and the PCX-50C multi-channel system when screening catalysts or conditions in parallel.

How do I improve reproducibility?

Always run dark controls for adsorption, periodically calibrate lamp decay, and verify reusability with catalyst-recovery experiments.

This article does not constitute a performance commitment; specific technical parameters are subject to the actual product documentation and mutual confirmation.

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