Khan, Moonis Ali Gee, Eundo Choi, Jaeyoung Kumar, Mahendra Jung, Woosik Timmes, Thomas C. Kim, Hyun-Chul Jeon, Byong-Hun 2024-01-20T10:04:19Z 2024-01-20T10:04:19Z 2021-09-05 2014-03-04 0098-6445 https://pubs.kist.re.kr/handle/201004/127008 A novel adsorbent was developed impregnating graphite nanocarbon (GNC) into alginate beads (AB) for efficient cobalt (Co(II)) removal from an aqueous solution. Physicochemical and spectroscopic properties of graphite nanocarbon-impregnated alginate beads (ABGNC) were characterized and compared with those of AB. Co(II) adsorption on ABGNC was quantitatively evaluated by determining kinetics and thermodynamics parameters. The Co(II) adsorption capacity onto ABGNC was highest at neutral pH condition. Increasing the temperature from 288 to 318K resulted in a 2.5-fold higher Co(II) adsorption onto AB, while thermal dependence of Co(II) adsorption on ABGNC was not found. Kinetic studies showed an applicability of the pseudo-second-order kinetic model for both AB and ABGNC. Monolayer adsorption was the dominant mechanism of Co(II) adsorption on both AB and ABGNC. Thermodynamic studies revealed that Co(II) adsorption was an endothermic and spontaneous process. Positive values of entropy indicate randomness in solid/aqueous phases, and mean free energy (E-a) fits in the range of chemisorption. English TAYLOR & FRANCIS INC DIVALENT METAL-IONS CARBON NANOTUBES AQUEOUS-SOLUTION ACTIVATED CARBON HEAVY-METALS CA-ALGINATE REMOVAL SORPTION BIOSORPTION CHITOSAN Adsorption of Cobalt onto Graphite Nanocarbon-Impregnated Alginate Beads: Equilibrium, Kinetics, and Thermodynamics Studies Article 10.1080/00986445.2013.773426 1 CHEMICAL ENGINEERING COMMUNICATIONS, v.201, no.3, pp.403 - 418 CHEMICAL ENGINEERING COMMUNICATIONS 201 3 403 418 scie scopus 000327187100008 2-s2.0-84889004896 Engineering, Chemical Engineering Article DIVALENT METAL-IONS CARBON NANOTUBES AQUEOUS-SOLUTION ACTIVATED CARBON HEAVY-METALS CA-ALGINATE REMOVAL SORPTION BIOSORPTION CHITOSAN Chemisorption Graphite nanocarbon-impregnated alginate beads Kinetics Thermodynamics