Poorly crystalline hydroxyapatite: A novel adsorbent for enhanced fulvic acid removal from aqueous solution
Source abstract
Abstract
Abstract In this study, poorly crystalline hydroxyapatite (HAP) was developed as an efficient adsorbent for the removal of fulvic acid (FA) from aqueous solution. Surface functionality, crystallinity, and morphology of the synthetic adsorbent were studied by Fourier-transformation infrared (FT-IR) spectroscopy, powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). The effects of various parameters such as crystallinity of adsorbent, contact time, adsorbent dosage, pH, initial adsorbate concentration, temperature, ionic strength and the presence of alkaline earth metal ions on FA adsorption were investigated. Results indicated that the nanosized HAP calcined at lower temperature was poorly crystalline ( X c = 0.23) and had better adsorption capacity for FA than those ( X c = 0.52, 0.86) calcined at higher temperature. FA removal was increased with increases of adsorbent dosage, temperature, ionic strength and the presence of alkali earth metal ions, but decreased as the pH increased. Kinetic studies showed that pseudo-second-order kinetic model better described the adsorption process. Equilibrium data were best described by Sips models, and the estimated maximum adsorption capacity of poorly crystalline HAP was 90.20 mg/g at 318 K, displaying higher efficiency for FA removal than previously reported adsorbents. FT-IR results revealed that FA adsorption over the adsorbent could be attributed to the surface complexation between the oxygen atom of functional groups of FA and calcium ions of HAP. Regeneration studies indicated that HAP could be recyclable for a long term. Findings of the present work highlight the potential for using poorly crystalline HAP nanoparticles as an effective and recyclable adsorbent for FA removal from aqueous solution.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Phosphorus and nutrient management · Adsorption and biosorption for pollutant removal · Radioactive element chemistry and processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (75)
Show source-provided references
1. Natural organic matter (NOM) adsorption to multi-walled carbon nanotubes: effect of NOM characteristics and water quality parameters10.1021/es702916h ↗
2. Isotherm and kinetic studies on the adsorption of humic acid onto chitosan-H2SO4 beads10.1016/j.desal.2011.01.024 ↗
3. Processes for the removal of humic substances from water an overview based on Norwegian experiences10.1016/S0273-1223(99)00638-1 ↗
4. Kinetics of aqueous photocatalytic oxidation of fulvic acids in a photocatalysis ultrafiltration reactor (PUR)10.1016/j.seppur.2005.11.017 ↗
5. Adsorption of humic substances onto β-FeOOH and its chemical regeneration10.1016/S0273-1223(99)00657-5 ↗
6. Removal of fulvic acids from aqueous solutions via surfactant modified zeolite10.1016/S1005-9040(06)60163-3 ↗
7. Adsorption of humic acid to aminopropyl functionalized SBA-1510.1016/j.micromeso.2009.12.018 ↗
8. Adsorptive removal of humic acid from aqueous solution on polyaniline/attapulgite composite10.1016/j.cej.2011.07.065 ↗
9. Adsorption of fulvic acid on goethite10.1016/S0016-7037(99)00176-3 ↗
10. Humic substances as precursors for potentially harmful disinfection by-products10.1016/S0273-1223(99)00636-8 ↗
11. Removal of dissolved hydrophobic and hydrophilic organic substances during coagulation/flocculation of surface waters10.2166/wst.1993.0273 ↗
12. Cost factors and chemical pretreatment effects in the membrane filtration of waters containing natural organic matter10.1016/S0043-1354(00)00418-8 ↗
13. Removal of natural organic matter by ion exchange10.1016/S0043-1354(02)00231-2 ↗
14. Adsorption and photocatalysis removal of fulvic acid by TiO2-graphene composites10.1007/s10853-013-7784-9 ↗
15. Characterization and activated carbon adsorption of several humic substances10.1016/0043-1354(80)90231-6 ↗
16. Activated carbon adsorption of humic substances10.1002/j.1551-8833.1981.tb04755.x ↗
17. Activated carbon adsorption of humic substances: I. Heterodisperse mixtures and desorption10.1016/0021-9797(88)90372-4 ↗
18. Removal of fulvic acid from aqueous media by adsorption onto modified vermiculite10.1016/j.clay.2006.02.004 ↗
19. Removal of natural organic polyelectrolytes by adsorption onto tobermorite10.1021/es020816v ↗
20. Adsorption on hydrous oxides. III. Fulvic acid and humic acid on goethite, gibbsite and imogolite10.1111/j.1365-2389.1977.tb02237.x ↗
21. Adsorption of fulvic acid on algal surfaces and its effect on carbon uptake10.1046/j.1529-8817.2001.037001047.x ↗
22. A comparative study of the adsorption of humic acid, fulvic acid and phenol onto Bacillus subtilis and activated sludge10.1016/j.jhazmat.2007.02.074 ↗
23. Chitosan hydrogel beads for fulvic acid adsorption: behaviors and mechanisms10.1016/j.cej.2007.11.025 ↗
24. Adsorption and desorption of humic and fulvic acids on SiO2 particles at nano and micro-scales10.1016/j.colsurfa.2011.03.045 ↗
25. Adsorption mechanism of humic and fulvic acid onto Mg/Al layered double hydroxides10.1016/j.clay.2007.02.010 ↗
26. Adsorption of fulvic acids from aqueous solutions by carbon nanotubes10.1002/jctb.1708 ↗
27. Adsorption of fulvic acid by carbon nanotubes from water10.1016/j.envpol.2008.11.007 ↗
28. Static and dynamic removal of aquatic natural organic matter by carbon nanotubes10.1016/j.watres.2014.04.030 ↗
29. Removal of nitrobenzene from aqueous solution by adsorption on nanocrystalline hydroxyapatite10.1016/j.desal.2010.06.043 ↗
30. New nanoporous carbon materials with high adsorption capacity and rapid adsorption kinetics for removing humic acids10.1016/S1387-1811(02)00611-X ↗
31. Adsorption of humic acid onto nanoscale zerovalent iron and its effect on arsenic removal10.1021/es0616534 ↗
32. Kinetic and isotherm studies of humic acid adsorption onto iron oxide magnetic nanoparticles in aqueous solutions10.4103/2277-9183.100133 ↗
33. Highly efficient removal of humic acid from aqueous solutions by Mg/Al layered double hydroxides-Fe3O4 nanocomposites10.1039/c4ra02212b ↗
34. Preparation of novel magnetic chitosan nanoparticle and its application for removal of humic acid from aqueous solution10.1016/j.apsusc.2013.12.125 ↗
35. Removal of Cu(II) ions from aqueous solutions by low-cost natural hydroxyapatite/chitosan composite: equilibrium, kinetic and thermodynamic studies10.1016/j.jtice.2013.11.009 ↗
36. Development of nano-hydroxyapatite/chitosan composite for cadmium ions removal in wastewater treatment10.1016/j.jtice.2013.10.008 ↗
37. Elimination of the interference from nitrate ions on oxalic acid in RP-HPLC by solid-phase extraction with nanosized hydroxyapatite10.1080/10826070802548705 ↗
38. Adsorption of some essential amino acids on hydroxyapatite10.1006/jcis.2001.7474 ↗
39. Adsorption/desorption of acidic and basic proteins on needle-like hydroxyapatite filter prepared by slip casting10.1016/S0272-8842(03)00061-0 ↗
40. Size-dependent defluoridation properties of synthetic hydroxyapatite10.1016/j.jfluchem.2009.03.007 ↗
41. Study the adsorption of phenol from aqueous solution on hydroxyapatite nanopowders10.1016/j.jhazmat.2008.03.076 ↗
42. Immobilization of lead and cadmium from aqueous solution and contaminated sediment using nanohydroxyapatite10.1016/j.envpol.2009.08.024 ↗
43. Mechanical properties and cytocompatibility of biomimetic hydroxyapatite-gelatin nanocomposites10.1557/jmr.2006.0394 ↗
44. Interaction between low molecular weight organic acids and hydroxyapatite with different degrees of crystallinity10.1016/j.colsurfa.2011.09.034 ↗
45. Ion adsorption behaviour of hydroxyapatite with different crystallinities10.1016/j.colsurfb.2009.06.031 ↗
46. Nano-crystallinite hydroxyapatite synthesized by neutralization with the assist of citric acid10.1016/j.matlet.2007.07.013 ↗
47. Removal of anionic dye Congo red from aqueous solution by raw pine and acid-treated pine cone powder as adsorbent: equilibrium, thermodynamic, kinetics, mechanism and process design10.1016/j.watres.2012.01.009 ↗
48. Adsorption of humic acid from aqueous solution onto unmodified and surfactant-modified chitosan/zeolite composites10.1016/j.cej.2012.06.039 ↗
49. Surfactant modified zeolite as adsorbent for removal of humic acid from water10.1016/j.clay.2011.03.015 ↗
50. Zur theorie der sogenannten adsorption gelöster stoffe, K. Sven. Vetenskapsakad. Handl
51. The sorption of lead (II) on peat10.1016/S0043-1354(98)00207-3 ↗
52. Pseudo-second order model for sorption processes10.1016/S0032-9592(98)00112-5 ↗
53. Defluoridation behavior of nanostructured hydroxyapatite synthesized through an ultrasonic and microwave combined technique10.1016/j.jhazmat.2010.08.087 ↗
54. Kinetics of adsorption on carbon from solution10.1061/JSEDAI.0000430 ↗
55. Adsorption of humic acid on acid-activated Greek bentonite10.1016/j.jcis.2009.07.028 ↗
56. Mechanisms and kinetics of humic acid adsorption ontochitosan-coated granules10.1016/S0021-9797(03)00393-X ↗
57. Stability studies for titanium dioxide nanoparticles upon adsorption of suwannee river humic and fulvic acids and natural organic matter10.1016/j.scitotenv.2013.08.038 ↗
58. Adsorption of humic acid by bi-functional resin JN-10 and the effect of alkali-earth metal ions on the adsorption10.1016/j.jhazmat.2009.11.142 ↗
59. Synthesis of magnetic chitosan nanoparticle and its adsorption property for humic acid from aqueous solution10.1016/j.colsurfa.2014.01.069 ↗
60. Adsorption of low concentration humic acid from water by palygorskite10.1016/j.clay.2011.09.012 ↗
61. The adsorption of gasses on plane surface of glass, mica and platinum10.1021/ja02242a004 ↗
62. Über die adsorption in lösungen
63. Heavy metal sorption by calcium alginate beads from Laminaria digitata10.1016/j.jhazmat.2006.05.017 ↗
64. Zhang · 2013
65. Adsorption thermodynamics of carbofuran on Sn(IV) arsenosilicate in H+, Na+, and Ca2+ forms10.1016/0166-6622(87)80259-7 ↗
66. The influence of pH and temperature on the morphology of hydroxyapatite synthesized by hydrothermal method10.1016/S0272-8842(02)00210-9 ↗
67. Complexes of fulvic acid on the surface of hematite, goethite, and akaganeite: FTIR observation10.1016/j.chemosphere.2005.08.054 ↗
68. Fluorescence and FT-IR spectroscopic studies of Suwannee river fulvic acid complexation with aluminum, terbium and calcium10.1016/S0162-0134(01)00318-X ↗
69. Adsorption and desorption of natural organic matter on iron oxide: mechanisms and models10.1021/es00050a007 ↗
70. Influence of mineral-bound humic substances on the sorption of hydrophobic organic compounds10.1021/es00080a009 ↗
71. Pyridine and phenol removal using natural and synthetic apatites as low cost sorbents: influence of porosity and surface interactions10.1016/j.jhazmat.2010.05.074 ↗
72. Preparation and characterization of surfactant-modified hydroxyapatite/zeolite composite and its adsorption behavior toward humic acid and copper(II)10.1007/s11356-012-1136-1 ↗
73. Surface complexation of calcium minerals in aqueous solutions. 1. Surface protonation of fluoroapatite water interfaces10.1016/0021-9797(91)90145-X ↗
74. The effects of adsorbed humic substances on the surface charge of goethite (α-FeOOH) in freshwaters10.1016/0016-7037(82)90292-7 ↗
75. Removal of Co2+ from aqueous solutions by hydroxyapatite10.1016/j.watres.2006.04.031 ↗