Peat Water Purification by Hydroxyapatite (HAp) Synthesized from Waste Pensi (Corbicula moltkiana) Shells

Hydroxyapatite (HAP) were synthesized from Pensi (Corbicula moltkiana) sheels by hydrothermal method and used as adsorbent for peat water purification. Batch adsorption experiments were performed to investigate the effects of various factors such as contact time, adsorbent dosage, and pH. The obtained materials were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM). Results showed that HAP calcined at 900°C (HAP900) and 1000°C (HAP1000) have a poorly crystalline shape. HAP900 also contain Tetracalsium Phosphate (TTCP) with a Ca/P molar ratio 2.18, while HAP 1000 contain HAp with a Ca/P molar ratio 1.67. Optimum condition for peat water purification with HAP900 and HAP1000 were both achieved at 1 hours, 1 grams adsorben mass at pH 2. SEM micrographs show that after purification, the surface of HAP were covered by organic compounds from peat water.

[1]  N. Charoenphandhu,et al.  Hydroxyapatite from fish scale for potential use as bone scaffold or regenerative material. , 2016, Materials science & engineering. C, Materials for biological applications.

[2]  A. Bandyopadhyay,et al.  Phase stability and biological property evaluation of plasma sprayed hydroxyapatite coatings for orthopedic and dental applications. , 2015, Acta biomaterialia.

[3]  Zhenggui Wei,et al.  Poorly crystalline hydroxyapatite: A novel adsorbent for enhanced fulvic acid removal from aqueous solution , 2015 .

[4]  I. Cacciotti,et al.  Fe-doped hydroxyapatite coatings for orthopedic and dental implant applications , 2014 .

[5]  F. Lusquiños,et al.  Biological hydroxyapatite obtained from fish bones , 2012 .

[6]  C. Moseke,et al.  Tetracalcium phosphate: Synthesis, properties and biomedical applications. , 2010, Acta biomaterialia.

[7]  W. Weng,et al.  Novel highly biodegradable biphasic tricalcium phosphates composed of α-tricalcium phosphate and β-tricalcium phosphate , 2007 .

[8]  Geoffrey Davies,et al.  Spectroscopic characterization of humic acid fractions isolated from soil using different extraction procedures , 2006 .

[9]  M. Bekbolet,et al.  Evaluation of humic acid photocatalytic degradation by UV–vis and fluorescence spectroscopy , 2005 .

[10]  H. M. Kim,et al.  Thin film of low-crystalline calcium phosphate apatite formed at low temperature. , 2000, Biomaterials.

[11]  M. Glimcher,et al.  Isolation of calcium‐phosphate crystals of bone by non‐aqueous methods at low temperature , 1995, Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research.

[12]  E. O’Loughlin,et al.  Molecular weight, polydispersity, and spectroscopic properties of aquatic humic substances. , 1994, Environmental science & technology.