TY - JOUR
T1 - Fe(III) loaded chitosan-biochar composite fibers for the removal of phosphate from water
AU - Palansooriya, Kumuduni Niroshika
AU - Kim, Sok
AU - Igalavithana, Avanthi Deshani
AU - Hashimoto, Yohey
AU - Choi, Yoon E.
AU - Mukhopadhyay, Raj
AU - Sarkar, Binoy
AU - Ok, Yong Sik
N1 - Funding Information:
This work was carried out with the support of the Cooperative Research Program for Agriculture Science and Technology Development (Effects of plastic mulch wastes on crop productivity and agro-environment, Project No. PJ01475801 ), Rural Development Administration, Republic of Korea. We would also like to thank Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation, and Aichi in Japan for the XAFS spectroscopy analysis.
Publisher Copyright:
© 2021
PY - 2021/8/5
Y1 - 2021/8/5
N2 - Excess phosphorous (P) in aquatic systems causes adverse environmental impacts including eutrophication. This study fabricated Fe(III) loaded chitosan-biochar composite fibers (FBC-N and FBC-C) from paper mill sludge biochar produced under N2 (BC-N) and CO2 (BC-C) conditions at 600 °C for adsorptive removal of phosphate from water. Investigations using SEM/EDX, XPS, Raman spectroscopy, and specific surface area measurement revealed the morphological and physico-chemical characteristics of the adsorbent. The Freundlich isotherm model well described the phosphate adsorption on BC-N, while the Redlich–Peterson model best fitted the data of three other adsorbents. The maximum adsorption capacities were 9.63, 8.56, 16.43, and 19.24 mg P g−1 for BC-N, BC-C, FBC-N, and FBC-C, respectively, indicating better adsorption by Fe(III) loaded chitosan-biochar composite fibers (FBCs) than pristine biochars. The pseudo-first-order kinetic model suitably explained the phosphate adsorption on BC-C and BC-N, while data of FBC-N and FBC-C followed the pseudo-second-order and Elovich model, respectively. Molecular level observations of the P K-edge XANES spectra confirmed that phosphate associated with iron (Fe) minerals (Fe-P) were the primary species in all the adsorbents. This study suggests that FBCs hold high potential as inexpensive and green adsorbents for remediating phosphate in contaminated water, and encourage resource recovery via bio-based management of hazardous waste.
AB - Excess phosphorous (P) in aquatic systems causes adverse environmental impacts including eutrophication. This study fabricated Fe(III) loaded chitosan-biochar composite fibers (FBC-N and FBC-C) from paper mill sludge biochar produced under N2 (BC-N) and CO2 (BC-C) conditions at 600 °C for adsorptive removal of phosphate from water. Investigations using SEM/EDX, XPS, Raman spectroscopy, and specific surface area measurement revealed the morphological and physico-chemical characteristics of the adsorbent. The Freundlich isotherm model well described the phosphate adsorption on BC-N, while the Redlich–Peterson model best fitted the data of three other adsorbents. The maximum adsorption capacities were 9.63, 8.56, 16.43, and 19.24 mg P g−1 for BC-N, BC-C, FBC-N, and FBC-C, respectively, indicating better adsorption by Fe(III) loaded chitosan-biochar composite fibers (FBCs) than pristine biochars. The pseudo-first-order kinetic model suitably explained the phosphate adsorption on BC-C and BC-N, while data of FBC-N and FBC-C followed the pseudo-second-order and Elovich model, respectively. Molecular level observations of the P K-edge XANES spectra confirmed that phosphate associated with iron (Fe) minerals (Fe-P) were the primary species in all the adsorbents. This study suggests that FBCs hold high potential as inexpensive and green adsorbents for remediating phosphate in contaminated water, and encourage resource recovery via bio-based management of hazardous waste.
KW - Charcoal
KW - Chitosan
KW - Clean water and sanitation
KW - Eutrophication
KW - Water quality
KW - XANES
UR - http://www.scopus.com/inward/record.url?scp=85102459763&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2021.125464
DO - 10.1016/j.jhazmat.2021.125464
M3 - Article
C2 - 33730647
AN - SCOPUS:85102459763
SN - 0304-3894
VL - 415
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 125464
ER -
