TY - JOUR
T1 - Adsorptive removal of Acid Blue 113 using hydroxyapatite nanoadsorbents synthesized using Peltophorum pterocarpum pod extract
AU - Sodhani, Hriday
AU - Hedaoo, Shantanu
AU - Murugesan, Gokulakrishnan
AU - Pai, Shraddha
AU - Vinayagam, Ramesh
AU - Varadavenkatesan, Thivaharan
AU - Bharath, G.
AU - Haija, Mohammad Abu
AU - Nadda, Ashok Kumar
AU - Govarthanan, Muthusamy
AU - Selvaraj, Raja
N1 - Funding Information:
The TEM image is depicted in Fig. 1C. Needle-like structures can be evidenced from the images, which agrees with FE-SEM results. The acicular-like morphology, interconnections, and agglomerations, is typical for crystalline nanoparticles (Laabd et al., 2021). The visible bright rings seen in the SAED pattern Fig. 1D supported the crystallinity of the HAP nanoparticles. The phytomolecules in the PP extract facilitated high crystallinity and the development of small particles during the synthesis process. For instance, a study underscored caffeine's role in HAP formation and concluded that 20 mg caffeine is essential to obtain crystalline HAP (Subramanian et al., 2020).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/7
Y1 - 2022/7
N2 - The present work reports the study on the green synthesis of hydroxyapatite (HAP) nanoadsorbents using Peltophorum pterocarpum pod extract. HAP nanoadsorbents were characterized by using FESEM, EDS, TEM, XRD, FTIR, XPS, and BET analyses. The results highlighted the high purity, needle-like aggregations, and crystalline nature of the prepared HAP nanoadsorbents. The surface area was determined as 40.04 m2/g possessing mesopores that can be related to the high adsorption efficiency of the HAP for the removal of a toxic dye, – Acid Blue 113 (AB 113) from water. Central Composite Design (CCD) was used for optimizing the adsorption process, which yielded 94.59% removal efficiency at the optimum conditions (dose: 0.5 g/L, AB 113 dye concentration: 25 ppm, agitation speed: 173 rpm, and adsorption time: 120 min). The adsorption kinetics followed the pseudo-second-order model (R2:0.9996) and the equilibrium data fitted well with the Freundlich isotherm (R2:0.9924). The thermodynamic parameters indicated that the adsorption of AB 113 was a spontaneous and exothermic process. The highest adsorption capacity was determined as 153.85 mg/g, which suggested the promising role of green HAP nanoadsorbents in environmental remediation applications.
AB - The present work reports the study on the green synthesis of hydroxyapatite (HAP) nanoadsorbents using Peltophorum pterocarpum pod extract. HAP nanoadsorbents were characterized by using FESEM, EDS, TEM, XRD, FTIR, XPS, and BET analyses. The results highlighted the high purity, needle-like aggregations, and crystalline nature of the prepared HAP nanoadsorbents. The surface area was determined as 40.04 m2/g possessing mesopores that can be related to the high adsorption efficiency of the HAP for the removal of a toxic dye, – Acid Blue 113 (AB 113) from water. Central Composite Design (CCD) was used for optimizing the adsorption process, which yielded 94.59% removal efficiency at the optimum conditions (dose: 0.5 g/L, AB 113 dye concentration: 25 ppm, agitation speed: 173 rpm, and adsorption time: 120 min). The adsorption kinetics followed the pseudo-second-order model (R2:0.9996) and the equilibrium data fitted well with the Freundlich isotherm (R2:0.9924). The thermodynamic parameters indicated that the adsorption of AB 113 was a spontaneous and exothermic process. The highest adsorption capacity was determined as 153.85 mg/g, which suggested the promising role of green HAP nanoadsorbents in environmental remediation applications.
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U2 - 10.1016/j.chemosphere.2022.134752
DO - 10.1016/j.chemosphere.2022.134752
M3 - Article
C2 - 35513083
AN - SCOPUS:85129724007
SN - 0045-6535
VL - 299
SP - 134752
JO - Chemosphere
JF - Chemosphere
M1 - 134752
ER -
