Biosorption of phenol from aqueous solution by biosolids

Area of Science:

• Environmental Science
• Water Treatment
• Adsorption Technology

Background:

• Phenol contamination in industrial wastewater poses significant environmental and health risks.
• Conventional treatment methods can be costly and less efficient for phenol removal.
• Biosolids from sewage treatment plants offer a potential low-cost adsorbent material.

Purpose of the Study:

• To investigate the efficacy of sewage treatment plant biosolids (BS) for phenol removal from aqueous solutions.
• To determine the optimal conditions for phenol adsorption using BS.
• To understand the adsorption mechanism through isotherm modeling.

Main Methods:

• Batch adsorption experiments were conducted to study phenol removal by BS.
• Key process variables investigated included initial phenol concentration, contact time, initial pH, and adsorbent dose.
• Langmuir and Freundlich isotherms were used to analyze the experimental data.

Main Results:

• Adsorption capacity of BS increased with decreasing initial phenol concentration and pH.
• Higher adsorption capacity was observed with increased contact time and adsorbent dose.
• Experimental data fitted well with both Langmuir and Freundlich isotherm models.

Conclusions:

• Sewage treatment plant biosolids are a viable, low-cost adsorbent for phenol removal from industrial wastewater.
• Optimizing pH, contact time, and adsorbent dosage enhances phenol adsorption efficiency.
• The study provides valuable data for designing effective phenol wastewater treatment systems using biosolids.