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Simulation of equilibrium system and release behaviors of both oxytetracycline and copper on aerobic granules in a sequencing batch reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
3716 183 2011 7 PDF Available
Title
Simulation of equilibrium system and release behaviors of both oxytetracycline and copper on aerobic granules in a sequencing batch reactor
Abstract

Accumulation of hard-to-degrade or nondegradable chemicals may be created in a long-time granule sludge treatment process. The excess accumulation of target chemicals on aerobic granules (AG) might induce inevitable release in sequencing batch reactors. In order to investigate the combined extent on AG with oxytetracycline (OTC) and copper as well as the better understanding of the environmental fate of chemicals, the saturated and equilibrated system was simulated by an adsorption test, and then a release experiment was conducted to study the influence of concentration, pH, ionic strength, and temperature. The results showed that isotherms of OTC and Cu(II) with high correlation coefficients (R2 = 0.991–0.996) and (R2 = 0.992–0.996) fit well with the Redlich–Peterson model (RPM). The bonding amounts of both OTC and Cu(II) increase in the coexisting system, indicating that the OTC–Cu(II) complex had stronger binary ability with AG. Relying on different initial concentrations, release of OTC from AG was 0.799–10.758% with decrease in coexisting Cu(II) ion concentration from 40 mg/L to 0 mg/L and 0.08–6.21% for Cu(II) with decrease in coexisting OTC concentration from 10 mg/L to 0 mg/L, indicating that decrease in coexisting ion concentration has adverse effect on their combined ability with AG.

► The saturated and equilibrated system was simulated by adsorption test. ► The bonding amounts of oxytetracycline (OTC) and Cu(II) increase in the coexisting system. ► Release of OTC and Cu(II) was conducted to study the influence of concentration, pH, ionic strength, and temperature. ► Relying on concentration, release of OTC and Cu(II) increased with decrease in the coexisting ion, respectively.

Keywords
Aerobic granules; Adsorption; Release; Oxytetracycline (OTC); Copper; Equilibrium system
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Simulation of equilibrium system and release behaviors of both oxytetracycline and copper on aerobic granules in a sequencing batch reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 56, Issue 3, 15 October 2011, Pages 198–204
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us