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Related Experiment Video

Updated: Jul 11, 2026

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

Studies on fluoride removal using adsorption process.

A R Tembhurkar¹, Shilpa Dongre

¹Visvesvaraya National Institute of Technology, Nagpur-440 011, Maharashtra, India. artembhurkar@rediffmail.com

Journal of Environmental Science & Engineering

|October 6, 2007

Summary

Commercially available activated charcoal effectively removes fluoride from contaminated water. Optimized conditions achieved 94% fluoride removal, demonstrating its suitability for water remediation.

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Area of Science:

Environmental Science
Water Treatment Technologies
Adsorption Processes

Background:

Fluoride contamination in water poses significant health risks.
Effective and economical water remediation methods are crucial for public health.
Activated charcoal is a widely available adsorbent with potential for fluoride removal.

Purpose of the Study:

To evaluate the efficiency of activated charcoal for removing fluoride from contaminated water.
To optimize key adsorption parameters for maximum fluoride removal.
To understand the adsorption behavior using isotherm and kinetic models.

Main Methods:

Batch adsorption experiments were conducted using activated charcoal.
Parameters studied included pH, adsorbent dose, stirring rate, contact time, and initial fluoride concentration.
Fluoride removal efficiency was measured under varying conditions.
Freundlich and Langmuir adsorption isotherms were analyzed.
Adsorption kinetics were determined.

Main Results:

The optimal adsorbent dose was determined to be 2.0 g/100 mL.
Equilibrium was reached at 120 minutes of contact time.
Enhanced fluoride adsorption was observed at a pH of 2.
A maximum fluoride removal efficiency of 94% was achieved under optimized conditions.
Adsorption data were fitted to both Freundlich and Langmuir models.

Conclusions:

Commercially available activated charcoal is a suitable and effective adsorbent for fluoride removal from contaminated water.
Optimized parameters significantly enhance fluoride removal efficiency.
The study provides valuable data for designing activated charcoal-based water treatment systems for fluoride remediation.