Efficient removal of tetracycline by reusable magnetic microspheres with a high surface area

► A novel magnetic resin Q100 is prepared with a high surface area. ► Q100 exhibited quite fast kinetics because of its small particle size. ► Q100 has efficient adsorption of tetracycline for its pore distribution. ► The effects of pH are important for tetracycline adsorption and desorption on resi...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2012-11, Vol.210, p.350-356
Main Authors: Zhou, Qing, Li, Zheqin, Shuang, Chendong, Li, Aimin, Zhang, Mancheng, Wang, Mengqiao
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Chemical engineering
Exact sciences and technology
High surface area
Ion exchange
Magnetic resin
Regeneration
Tetracycline
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Summary:► A novel magnetic resin Q100 is prepared with a high surface area. ► Q100 exhibited quite fast kinetics because of its small particle size. ► Q100 has efficient adsorption of tetracycline for its pore distribution. ► The effects of pH are important for tetracycline adsorption and desorption on resins. ► Q100 is a reusable adsorbent with excellent regeneration behavior. A novel hypercrosslinked magnetic resin Q100 with a high surface area of 1153.8m2/g was prepared and characterized. Another magnetic resin (Q80) and two non-magnetic commercial resins (NDA150 and XAD-4) were selected as adsorbents for comparison to investigate the adsorption behavior and predominant factors controlling the adsorption of tetracycline (TC) onto the adsorbents. The adsorption kinetics of TC onto all resins followed a pseudo-second-order equation. Q100 exhibited much faster kinetics (k2=0.18) than the commercial resins XAD-4 (k2=0.031) and NDA150 (k2=0.021) because of the much smaller particle size of Q100. Moreover, Q100 also had the largest adsorption of the four resins due to its high surface area and abundant mesopore structure. For all of the adsorbents used in the present work, pH 5–6 was suitable for TC adsorption, whereas pH>12 could be used for regeneration. An increased ionic concentration could enhance the adsorption of TC on the four resins for the salting out effect. The recyclabilities of the four resins were also evaluated, and Q100 was found to be more reusable for TC removal than the other three resins.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2012.08.081