Adsorptive removal of Acid Blue 113 using hydroxyapatite nanoadsorbents synthesized using Peltophorum pterocarpum pod extract

Hriday Sodhani, Shantanu Hedaoo, Gokulakrishnan Murugesan, Shraddha Pai, Ramesh Vinayagam, Thivaharan Varadavenkatesan, G. Bharath, Mohammad Abu Haija, Ashok Kumar Nadda, Muthusamy Govarthanan, Raja Selvaraj

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

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.

Original languageBritish English
Article number134752
JournalChemosphere
Volume299
DOIs
StatePublished - Jul 2022

Keywords

  • Acid blue 113
  • Green synthesis
  • Hydroxyapatite
  • Nanoadsorbents
  • Peltophorum pterocarpum

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