Nanostructured fusiform hydroxyapatite particles precipitated from aquaculture wastewater

Covadonga Correas; Michael L Gerardo; Alexander M Lord; Michael B Ward; Enrico Andreoli; Andrew R Barron

doi:10.1016/j.chemosphere.2016.11.133

Nanostructured fusiform hydroxyapatite particles precipitated from aquaculture wastewater

Chemosphere. 2017 Feb:168:1317-1323. doi: 10.1016/j.chemosphere.2016.11.133. Epub 2016 Dec 2.

Authors

Covadonga Correas¹, Michael L Gerardo², Alexander M Lord³, Michael B Ward⁴, Enrico Andreoli⁵, Andrew R Barron⁶

Affiliations

¹ Energy Safety Research Institute, Swansea University, Bay Campus, Swansea, SA1 8QQ Wales, UK.
² College of Engineering, Swansea University, Bay Campus, Swansea, SA1 8QQ Wales, UK.
³ Centre for NanoHealth, Swansea University, Singleton Campus, SA2 8PP Wales, UK.
⁴ Leeds Electron Microscopy and Spectroscopy Centre, University of Leeds, LS2 9JT England, UK.
⁵ Energy Safety Research Institute, Swansea University, Bay Campus, Swansea, SA1 8QQ Wales, UK. Electronic address: e.andreoli@swansea.ac.uk.
⁶ Energy Safety Research Institute, Swansea University, Bay Campus, Swansea, SA1 8QQ Wales, UK; Department of Chemistry, Rice University, Houston, TX 77005, USA; Department of Materials Science and Nanoengineering, Rice University, Houston, TX 77005, USA. Electronic address: arb@rice.edu.

PMID: 27919539
DOI: 10.1016/j.chemosphere.2016.11.133

Abstract

The present work represents a new approach for the isolation of uniform nano particulate hydroxyapatite (HAp). The chemical characterization of a calcium phosphate product obtained from industrial trout farm aquaculture wastewater by two different routes, washing either with a basic aqueous medium (wash_NaOH) or followed by a further washing with ethanol (wash_EtOH), is explored. Characterization of the isolated materials includes morphology studies (SEM and TEM), structural (XRD, electron diffraction), compositional (EDX) and thermogravimetric analysis (TGA). The obtained products are a mixture of different compounds, with hydroxyapatite the predominant phase. The morphology is unusually nanometric size with fusiform shaped particles, such characteristics are ordinarily only obtained by synthetic routes. This process of phosphate precipitation represents a unique self-sufficient process to be compared to conventional chemical or biological practices for precipitating phosphate.

Keywords: Calcium phosphate; Fusiform; Hydroxyapatite; Morphology; Nano; Trout.

MeSH terms

Aquaculture*
Chemical Precipitation
Durapatite / chemistry*
Nanostructures / chemistry*
Wastewater / chemistry*
X-Ray Diffraction

Substances

Waste Water
Durapatite