TY - JOUR
T1 - Sorption process of municipal solid waste biochar-montmorillonite composite for ciprofloxacin removal in aqueous media
AU - Ashiq, Ahmed
AU - Sarkar, Binoy
AU - Adassooriya, Nadeesh
AU - Walpita, Janitha
AU - Rajapaksha, Anushka Upamali
AU - Ok, Yong Sik
AU - Vithanage, Meththika
N1 - Funding Information:
This work was supported by the Research Council grant [ ASP/01/RE/SCI/2017/83 ] of University of Sri Jayewardenepura , Sri Lanka. Analytical support from the Instrument Centre, Faculty of Applied Sciences, University of Sri Jayewardenepura , Sri Lanka, is also acknowledged.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/12
Y1 - 2019/12
N2 - This study evaluates a novel adsorbent for ciprofloxacin (CPX) removal from water using a composite derived from municipal solid waste biochar (MSW-BC) and montmorillonite (MMT). The composite adsorbent and pristine materials were characterized using powder X-Ray Diffraction (PXRD), Fourier-Transform Infrared (FTIR) spectroscopy, and Scanning Electron Microscope (SEM) before and after the adsorption. Batch experiments were conducted to study the mechanisms involved in the adsorption process. Ciprofloxacin sorption mechanisms were interpreted in terms of its pH-dependency and the distribution coefficients. The SEM images confirmed the successful binding of MMT onto the MSW-BC through flaky structure along with a porous morphology. Encapsulation of MMT onto MSW-BC was exhibited through changes in the basal spacing of MMT via PXRD analysis. Results from FTIR spectra indicated the presence of functional groups for both pristine materials and the composite that were involved in the adsorption reaction. The Hill isotherm model and pseudo-second-order and Elovich kinetic models fitted the batch sorption data, which explained the surface heterogeneity of the composite and cooperative adsorption mechanisms. Changes made to the MSW-BC through the introduction of MMT, enhanced the active sites on the composite adsorbent, thereby improving its interaction with ionizable CPX molecules giving high sorption efficiency.
AB - This study evaluates a novel adsorbent for ciprofloxacin (CPX) removal from water using a composite derived from municipal solid waste biochar (MSW-BC) and montmorillonite (MMT). The composite adsorbent and pristine materials were characterized using powder X-Ray Diffraction (PXRD), Fourier-Transform Infrared (FTIR) spectroscopy, and Scanning Electron Microscope (SEM) before and after the adsorption. Batch experiments were conducted to study the mechanisms involved in the adsorption process. Ciprofloxacin sorption mechanisms were interpreted in terms of its pH-dependency and the distribution coefficients. The SEM images confirmed the successful binding of MMT onto the MSW-BC through flaky structure along with a porous morphology. Encapsulation of MMT onto MSW-BC was exhibited through changes in the basal spacing of MMT via PXRD analysis. Results from FTIR spectra indicated the presence of functional groups for both pristine materials and the composite that were involved in the adsorption reaction. The Hill isotherm model and pseudo-second-order and Elovich kinetic models fitted the batch sorption data, which explained the surface heterogeneity of the composite and cooperative adsorption mechanisms. Changes made to the MSW-BC through the introduction of MMT, enhanced the active sites on the composite adsorbent, thereby improving its interaction with ionizable CPX molecules giving high sorption efficiency.
KW - Antibiotics
KW - Biochar
KW - Emerging contaminants
KW - Pharmaceuticals
KW - Wastewater
UR - http://www.scopus.com/inward/record.url?scp=85069705544&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2019.124384
DO - 10.1016/j.chemosphere.2019.124384
M3 - Article
C2 - 31545191
AN - SCOPUS:85069705544
SN - 0045-6535
VL - 236
JO - Chemosphere
JF - Chemosphere
M1 - 124384
ER -
