Magnetic Fixed-bed Column for Cr(VI) Removal from Aqueous Solution Using Schwertmannite

• Published in: ISIJ International Vol. 48; no. 2; pp. 240 - 244
• Main Authors: Eskandarpour, Akbar, Onyango, Maurice S., Tanahashi, Mitsuru, Ochieng, Aoyi, Bando, Yoshiyuki, Iwai, Kazuhiko, Okido, Masazumi, Asai, Shigeo
• Format: Journal Article
• Language: English
• Published: Tokyo The Iron and Steel Institute of Japan 01.01.2008; Iron and Steel Institute of Japan
• Subjects: Applied sciences; Cr removal; electromagnetic processing of materials; Exact sciences and technology; high magnetic field; magnetic fixed bed column; Metals. Metallurgy; schwertmannite; wastewater treatment; Magnetic field effect; Removal; Cr removal; wastewater treatment; Aqueous solution; Waste water purification; electromagnetic processing of materials; magnetic fixed bed column; Magnetic field; high magnetic field; Waste water; schwertmannite
• ISSN: 0915-1559; 1347-5460
• DOI: 10.2355/isijinternational.48.240

The fine particles of schwertmannite as an iron oxyhydroxide adsorbent has been suggested as a novel and strong Cr(VI) sorbent for treatment of Cr-contaminated industrial wastewater. The removal process was conducted in both batch and continuous trials. As a result of the batch experiments, the maximal adsorption capacity of the schwertmannite was obtained as 178 mg/g which was quite high amount in comparison with the usual applied Cr(VI) sorbents in the literatures. The continuous removal process involved a combination of a fixed bed column with a high gradient magnetic field which was firstly introduced as a novel designation of a fixed bed column to overcome the difficulties accompanied with the application of some especial fine particle adsorbents through the fixed-beds. The experimental results revealed that the magnetization force had a great function in this process to control the shape and the fitness of the bed during the sorption test as well as to simplify the experimental set-up.