Adsorption Performance of Modified Graphite from Synthetic Dyes Solutions

Area of Science:

• Environmental Chemistry
• Materials Science

Background:

• Industrial dyeing wastewater poses significant risks to ecosystems and human health.
• Effective treatment methods are essential for mitigating these harmful impacts.

Purpose of the Study:

• To investigate the efficacy of modified graphite as an adsorbent for treating industrial dyeing wastewater.
• To optimize the adsorption properties of graphite through chemical modification and thermal treatment.

Main Methods:

• Graphite was oxidized and intercalated using a phosphoric acid-nitric acid-potassium permanganate system.
• Thermal treatment at high temperatures was employed to modify graphite's porosity and structure.
• Adsorption experiments were conducted using methylene blue (MB) dye, with kinetics and isotherm models applied.

Main Results:

• Optimized graphite adsorbent achieved over 85% removal rate for methylene blue dye.
• Optimal adsorption conditions were determined: 1.6 mg adsorbent, 60 °C, alkaline conditions for 10 ppm MB.
• Adsorption followed the Langmuir model, indicating favorable monolayer homogeneous adsorption.

Conclusions:

• High-temperature treatment significantly enhances the adsorption properties of coal-based graphite.
• Modified graphite shows strong potential as an effective adsorbent for dyeing wastewater treatment.
• The study supports the application of advanced graphite materials in environmental remediation.