TY - JOUR
T1 - Calcium alginate beads with entrapped iron oxide magnetic nanoparticles functionalized with methionine—a versatile adsorbent for arsenic removal
AU - Lilhare, Surbhi
AU - Mathew, Sunitha B.
AU - Singh, Ajaya K.
AU - Carabineiro, Sónia A. C.
N1 - info:eu-repo/grantAgreement/FCT/CEEC INST 2018/6885/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157669/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157968/PT#
no. 3114/8/Fin./Sch.// 2018
UIDP/50006/2020
PY - 2021/5/20
Y1 - 2021/5/20
N2 - A novel beads adsorbent, consisting of calcium alginate entrapped on magnetic nanoparti-cles functionalized with methionine (MFMNABs), was developed for effective elimination of arsenic from water. The material was characterized by FT-IR (Fourier Transform Infrared Spectroscopy), SEM (Scanning Electron Microscopic), XRD (X-ray Diffraction) and TEM (Transmission Electron Microscopy). The arsenic removal capacity of the material was studied by altering variables such as pH of the solution, contact time, adsorbent dose and adsorbate concentration. The maximal removal of As(III) was 99.56% under optimal conditions with an equilibrium time of 110 min and pH 7.0–7.5. The adsorption followed a second order kinetics and data best fitted the Langmuir isotherm with a correlation coefficient of R2 = 0.9890 and adsorption capacity (qm ) of 6.6533 mg/g. The thermodynamic study showed entropy change (∆S) and enthalpy change (∆H) to be 34.32 J mol−1 K and 5.25 kJ mol−1, respectively. This study proved that it was feasible to treat an As(III) solution with MFMNABs. The synthesized adsorbent was cost-effective, environmentally friendly and versatile, compared to other adsorbents. The adsorption study was carried by low cost spectrophotometric method using N-bromosuccinimide and rhodamine-B developed in our laboratory.
AB - A novel beads adsorbent, consisting of calcium alginate entrapped on magnetic nanoparti-cles functionalized with methionine (MFMNABs), was developed for effective elimination of arsenic from water. The material was characterized by FT-IR (Fourier Transform Infrared Spectroscopy), SEM (Scanning Electron Microscopic), XRD (X-ray Diffraction) and TEM (Transmission Electron Microscopy). The arsenic removal capacity of the material was studied by altering variables such as pH of the solution, contact time, adsorbent dose and adsorbate concentration. The maximal removal of As(III) was 99.56% under optimal conditions with an equilibrium time of 110 min and pH 7.0–7.5. The adsorption followed a second order kinetics and data best fitted the Langmuir isotherm with a correlation coefficient of R2 = 0.9890 and adsorption capacity (qm ) of 6.6533 mg/g. The thermodynamic study showed entropy change (∆S) and enthalpy change (∆H) to be 34.32 J mol−1 K and 5.25 kJ mol−1, respectively. This study proved that it was feasible to treat an As(III) solution with MFMNABs. The synthesized adsorbent was cost-effective, environmentally friendly and versatile, compared to other adsorbents. The adsorption study was carried by low cost spectrophotometric method using N-bromosuccinimide and rhodamine-B developed in our laboratory.
KW - Adsorption
KW - Arsenic (III)
KW - Calcium alginate
KW - Magnetic nanoparticles
KW - Methionine functionalized
KW - Spectrophotometric method
UR - http://www.scopus.com/inward/record.url?scp=85106181976&partnerID=8YFLogxK
U2 - 10.3390/nano11051345
DO - 10.3390/nano11051345
M3 - Article
C2 - 34065311
AN - SCOPUS:85106181976
VL - 11
JO - Nanomaterials
JF - Nanomaterials
SN - 2079-4991
IS - 5
M1 - 1345
ER -