Removal of fluoride from water through bacterial-surfactin mediated novel hydroxyapatite nanoparticle and its efficiency assessment: Adsorption isotherm, adsorption kinetic and adsorption Thermodynamics
Article
Article Title | Removal of fluoride from water through bacterial-surfactin mediated novel hydroxyapatite nanoparticle and its efficiency assessment: Adsorption isotherm, adsorption kinetic and adsorption Thermodynamics |
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ERA Journal ID | 212399 |
Article Category | Article |
Authors | Maity, Jyoti Prakash (Author), Hsu, Chun-Mei (Author), Lin, Tz-Jiun (Author), Lee, Wen-Chien (Author), Bhattacharya, Prosun (Author), Bundschuh, Jochen (Author) and Chen, Chien-Yen (Author) |
Journal Title | Environmental Nanotechnology, Monitoring & Management |
Journal Citation | 9, pp. 18-28 |
Number of Pages | 11 |
Year | 2018 |
Publisher | Elsevier BV |
Place of Publication | Netherlands |
ISSN | 2215-1532 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.enmm.2017.11.001 |
Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S2215153217301940 |
Abstract | Fluoride contamination in water due to natural and anthropogenic activities has been documented as serious problems worldwide commanding a major threat to the environment. Present study focuses to synthesis bacterial-surfactin (Bacillus subtilis) mediated nano-hydroxyapatite (HAp), novel adsorbents for defluoridation. HAp particle size and morphology were controlled by varying temperature of 90–150 °C and pH of 7–11, respectively. The TEM and SEM micrographs reveal that the short-rod particle is observed 20–30 nm at 90 °C and pH 11. The ratio between the length (nm) and width (nm) of nanoparticle are decreased from 4.17 to 1.65 with increasing pH (7–11). The selected area diffraction (SAD) of particles are indicated uniform rod-like monocrystals. The XRD and FTIR observations were indicated the synthesized HAp nanoparticles were well-crystallized with purity phase and high quality. The study reflected that the fluoride removal from contaminated water by HAp was increased significantly (R2 = 99) with the increasing adsorbent concentration, temperature and time, with two-step adsorption process as the first portion a rapid adsorption occurs during first 90 min after which equilibrium is slowly achieved. The adsorption process is closer to Freundlich isotherm (R2 > 98) than to Langmuir isotherm (R2 ≈ 92), indicating HAp as a good adsorbent (n > 3). Above 97% of fluoride removal were noticed at a HAp dose of 0.06 g/10 mL. The adsorption kinetics more fit with pseudo-second-order (R2= 99) in compare to pseudo-first-order (R2 ≈ 91). The slope and intercept of Arrhenius equation indicated the activation/adsorption energy (Ea) of 3.199 kJ/mol and frequency factor (A) of 1.78 1/s. Adsorption thermodynamic parameters (free energy (ΔG < 0), enthalpy (ΔH > 0) and entropy (ΔS > 0)) indicates the spontaneous and endothermic reactions of the adsorption process. Thus, newly synthesized HAp nanoparticles exhibit as a good adsorbent for fluoride removal, theoretically and experimentally being applicable for environmental pollution control. |
Keywords | Characterization fluoride removal; Hydrothermal synthesis of HAp; Isotherm and kinetic and thermodynamics; Surfactin of Bacillus subtilis |
ANZSRC Field of Research 2020 | 401199. Environmental engineering not elsewhere classified |
400411. Water treatment processes | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | International Centre for Applied Climate Science |
National Chung Cheng University, Taiwan | |
KTH Royal Institute of Technology, Sweden | |
Faculty of Health, Engineering and Sciences | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7963/removal-of-fluoride-from-water-through-bacterial-surfactin-mediated-novel-hydroxyapatite-nanoparticle-and-its-efficiency-assessment-adsorption-isotherm-adsorption-kinetic-and-adsorption-thermodynamics
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