Adsorption Behavior of Polyelectrolyte onto Alumina and Application in Ciprofloxacin Removal

Polymers
Thi Huong DaoTien Duc Pham

Abstract

This study aims to investigate the adsorption behavior of a strong polyelectrolyte poly(styrenesulfonate) (PSS) onto alumina particles. Adsorption of PSS onto positively charged alumina surface increased with increasing ionic strength, indicating that non-electrostatic and electrostatic interaction controlled the adsorption. The removal of an emerging antibiotic ciprofloxacin (CFX) from water environment using PSS-modified alumina (PMA) was also studied. The removal of CFX using PMA was much higher than that using alumina particles without PSS modification in all pH ranges of 2-11. The removal of CFX reached 98% under the optimum conditions of pH 6, contact time of 120 min, adsorbent dosage of five milligrams per milliliter and ionic strength 104-M NaCl. The adsorption isotherms of CFX at different salt concentrations fit well with a two-step adsorption model, while the adsorption kinetic fit well with a pseudo-second-order model with a good correlation coefficient (R2 > 0.9969). The CFX-removal from a hospital wastewater using PMA was more than 75%. Our study demonstrates that adsorption of PSS onto alumina to modify the particle surface is important to form a novel adsorbent PMA for CFX-removal from water environments.

References

Nov 10, 2004·Journal of Colloid and Interface Science·F AloulouD Beneventi
Nov 17, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Z AdamczykB Jachimska
May 3, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Ingo HoffmannMichael Gradzielski
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Feb 9, 2016·The Lancet Infectious Diseases·Timothy R WalshBrigitte Dréno
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Apr 14, 2018·Environment International·Yuyi YangWei Xing
Sep 3, 2018·The Lancet Infectious Diseases·Anuja ChatterjeeJulie V Robotham

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Citations

Apr 11, 2021·Environmental Science and Pollution Research International·Nafisur Rahman, Poornima Varshney

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Methods Mentioned

BETA
biosensor
PMA
infrared spectroscopy
modified

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