Dataset on the decolorization of Naphthol Green B using a UV/sulfite system: Optimization by response surface...

Area of Science:

• Environmental Chemistry
• Water Treatment Technologies
• Dye Degradation

Background:

• Naphthol Green B (NGB) is a widely used synthetic azo dye.
• Industrial release of NGB poses significant environmental and ecological risks to aquatic systems.

Purpose of the Study:

• To investigate the decolorization of Naphthol Green B using a UV/sulfite system.
• To optimize the decolorization process using statistical design and identify key influencing factors.

Main Methods:

• Utilized a 3^2 Full Factorial Design (FFD) to optimize NGB decolorization.
• Analyzed the influence of sulfite concentration (mM) and pH on the percentage of decolorization.
• Employed Analysis of Variance (ANOVA) to assess model fit and factor significance.

Main Results:

• The statistical model demonstrated a high goodness-of-fit (R^2 = 99.54%, R^2_adj = 98.76%).
• Sulfite concentration (A) and pH (B), along with their quadratic terms (A^2, B^2), were significant factors.
• Optimal conditions predicted were 12 mM sulfite and pH 10, with a predicted decolorization of ≥100%.

Conclusions:

• The UV/sulfite system is effective for Naphthol Green B decolorization.
• The optimized conditions achieved a high actual decolorization rate of 96.2%, validating the model's predictions.
• This study provides an efficient method for treating NGB-contaminated wastewater.