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Related Experiment Video

Updated: Jul 3, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

Published on: December 17, 2018

Cadmium removal in a biosorption column.

B Volesky¹, I Prasetyo

¹Department of Chemical Engineering, McGill University, Montreal, Canada H3A 2A7.

Biotechnology and Bioengineering

|May 1, 1994

Summary

A novel biosorbent from brown marine algae Ascophyllum nodosum efficiently removes cadmium from water. This study quantifies its performance in packed-bed columns, offering insights for water treatment design.

Area of Science:

Environmental Science
Materials Science
Chemical Engineering

Background:

Cadmium contamination poses significant risks to water quality and human health.
Marine algae, such as Ascophyllum nodosum, present a sustainable and abundant source for biosorbent development.
Effective biosorbents are crucial for developing efficient water purification technologies.

Purpose of the Study:

To evaluate the efficacy of a novel biosorbent derived from Ascophyllum nodosum for cadmium removal.
To characterize the performance of this biosorbent in packed-bed flow-through sorption columns.
To determine key process parameters for the design and comparison of biosorption systems.

Main Methods:

Utilizing packed-bed flow-through sorption columns to test the biosorbent's capacity.

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Applying the Bohart and Adams sorption model for quantitative analysis of experimental data.

Determining critical process parameters including metal loading, bed depth, and mass transfer coefficients.

Main Results:

The biosorbent achieved a 99.985% removal of cadmium, reducing 10 mg/L to 1.5 ppb.
An average metal loading of 30 mg Cd/g was determined, consistent with batch equilibrium data.
Critical bed depth varied from 20 to 50 cm depending on the flow rate, meeting potable water standards.

Conclusions:

Ascophyllum nodosum-derived biosorbent demonstrates high efficiency for cadmium removal in continuous flow systems.
The Bohart and Adams model provides valuable parameters for process design and performance evaluation.
This biosorbent shows significant potential for practical application in wastewater treatment and water purification.