What is it about?
In this paper, commercially available granular activated carbon (AC) was covalently functionalized with three sulfur-containing ligands—thiodiglycol, thiourea, and cysteine. The ligands were introduced in order to improve adsorption capacity for the removal of cadmium ions from aqueous solutions. The AC functionalized with cysteine and thiourea had twice the adsorption capacity of Cd(II) than the pristine AC. The introduction of sulfur-containing ligands also improved the adsorption kinetics, i.e. the adsorption kinetic rates were ca. 2–10 times higher than the pristine AC.
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Why is it important?
Cadmium is a heavy metal that has high toxic potential. Biological absorption of cadmium can cause severe disease. Cadmium ions are frequently removed from the aqueous environment via adsorption.
Perspectives
This enhancement of the adsorption performance was systematically studied in terms of morphology, texture, structural features, the content of sulfur-containing ligands and surface chemistry.
Dr Ajaya Bhattarai
Tribhuvan University
Read the Original
This page is a summary of: Improved adsorption performance of activated carbon covalently functionalised with sulphur-containing ligands in the removal of cadmium from aqueous solutions, International Journal of Environmental Science and Technology, May 2019, Springer Science + Business Media,
DOI: 10.1007/s13762-019-02398-0.
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