Related Experiment Video
Updated: Feb 18, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Published on: February 21, 2017
Properties of vanadium-loaded iron sorbent after alkali regeneration
Muhammad Kamran Khalid1, Tiina Leiviskä1, Juha Tanskanen1
1Chemical Process Engineering, University of Oulu, P.O. Box 4300, Oulu, FIN-90014 Finland
Abstract:
The aim of this research was to investigate the regeneration and reuse of a commercial granular iron sorbent (mainly goethite) when used in vanadium removal. A regeneration rate of 3 M NaOH was the highest (85%) achieved, followed by 2 M NaOH (79%) and 1 M NaOH (68%). The breakthrough curves show that the regenerated material can be reused. The BET (Brunauer-Emmett-Teller) surface area increased by 35-38% and the total pore volume increased by 123-130% as a consequence of NaOH treatment. The results indicated that sodium hydroxide could be used for the regeneration of iron sorbent although the regeneration was incomplete. This may be explained by the fact that vanadium diffusion into pores is a significant sorption mechanism in addition to complex formation with surface functional groups. As a consequence, vanadium desorbability from pores is not as effective as the regeneration of surface sites. X-ray photoelectron spectroscopy analyses confirmed a very low vanadium content on the surface of the NaOH-treated iron sorbent.
Related Concept Videos
Qualitative Analysis
For instance, group IV...
Sample Preparation for Analysis: Advanced Techniques
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
Ionic Strength: Effects on Chemical Equilibria
In this solution, the primary...
Alkali Aggregate Reaction in Concrete

