Adsorption Behavior of Polyelectrolyte onto Alumina and Application in Ciprofloxacin Removal

Thi Huong Dao, Ngoc Trung Nguyen, Minh Ngoc Nguyen, Cao Long Ngo, Nhu Hai Luong, Duy Binh Le, Tien Duc Pham
2020 Polymers  
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
more » ... her 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.
doi:10.3390/polym12071554 pmid:32674270 pmcid:PMC7407586 fatcat:32jpjwjcwfdkjbejm7ieonbl2i