Pretreatment of Color Filter Wastewater towards Biodegradable by Fresnel-Lens-Assisted Solar TiO₂ Photocatalysis

Figure 1

Contour of the biodegradability (a) and degradation efficiency (b) and (c) of color filter wastewater as a function of initial pH and TiO₂ dosage (reaction time: 3 h).

(a)

(b)

(c)