Solid Phase Extraction for the Determination of Methylene Blue Using Lignocellulosic Biosorbent in Aqueous Solutions

Area of Science:

• Environmental Chemistry
• Materials Science
• Green Chemistry

Background:

• Synthetic dyes pose significant environmental risks due to their toxicity, mutagenicity, and carcinogenicity.
• Disruption of aquatic ecosystems by industrial dye pollution necessitates effective detection and removal strategies.
• Wastewater contamination by dyestuffs is a critical global environmental concern.

Purpose of the Study:

• To develop and optimize a lignocellulosic biosorbent from tea waste for methylene blue extraction.
• To investigate the factors influencing the efficiency of solid-phase extraction for dye removal.
• To evaluate the potential of activated tea waste as a sustainable adsorbent for colored contaminants.

Main Methods:

• Preparation of a lignocellulosic biosorbent from tea waste activated with zinc chloride (ZnCl2).
• Optimization of solid-phase extraction parameters including adsorbent amount, wash solvent, loading volume, elution solvent, and eluent volume.
• Extraction and quantification of methylene blue from aqueous solutions using the prepared biosorbent.

Main Results:

• Optimized conditions yielded high methylene blue recovery rates, ranging from 94.4% to 98.9%.
• The developed method demonstrated high efficiency in removing methylene blue from aqueous samples.
• The activated tea waste biosorbent proved effective for the solid-phase extraction of the target dye.

Conclusions:

• Activated tea waste is a viable and efficient biosorbent for methylene blue removal from wastewater.
• The optimized solid-phase extraction method offers a promising approach for treating dye-contaminated water.
• This study highlights the potential of utilizing agricultural waste for environmental remediation applications.