Issue 51, 2021
From the journal:

RSC Advances

3D-printed monolithic biofilters based on a polylactic acid (PLA) – hydroxyapatite (HAp) composite for heavy metal removal from an aqueous medium†

Natalia Fijoł, ORCID logo a   Hani Nasser Abdelhamid,ab   Binsi Pillai,c   Stephen A. Hall,de   Nebu Thomasf  and  Aji P. Mathew ORCID logo *a  

* Corresponding authors

a Department of Materials and Environmental Chemistry, Stockholm University, Frescativägen 8, Stockholm, Sweden
E-mail: aji.mathew@mmk.su.se
Tel: +46 8161256

b Advanced Multifunctional Materials Laboratory, Department of Chemistry, Faculty of Science, Assiut University, Assiut 71515, Egypt

c ICAR-Central Institute of Fisheries Technology, Matsyapuri, Willington Island, Cochin, India – 682 029

d Division of Solid Mechanics, Lund University, Lund, Sweden

e Lund Institute of Advanced Neutron and X-Ray Science, Lund, Sweden

f Department of Periodontology, Pushpagiri College of Dental Sciences, Thiruvalla, Kerala, India

Abstract

High flux, monolithic water purification filters based on polylactic acid (PLA) functionalised with fish scale extracted hydroxyapatite (HAp) were prepared by solvent-assisted blending and thermally induced phase separation (TIPS), followed by twin-screw extrusion into filaments and processed via three-dimensional (3D) printing. The printed filters with consistent pore geometry and channel interconnectivity as well as homogenous distribution of HAp in the PLA matrix showed adsorption capabilities towards heavy metals i.e. cadmium (Cd) and lead (Pb) with maximum adsorption capacity of 112.1 mg gHAp−1 and 360.5 mg gHAp−1 for the metal salt of Pb and Cd, respectively. The adsorption was found to be driven by a combination of ion exchange, dissolution and precipitation on HAp and surface complexation.

Graphical abstract: 3D-printed monolithic biofilters based on a polylactic acid (PLA) – hydroxyapatite (HAp) composite for heavy metal removal from an aqueous medium

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Article information

DOI
https://doi.org/10.1039/D1RA05202K
Article type
Paper
Submitted
06 Jul 2021
Accepted
23 Sep 2021
First published
01 Oct 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 32408-32418

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3D-printed monolithic biofilters based on a polylactic acid (PLA) – hydroxyapatite (HAp) composite for heavy metal removal from an aqueous medium

N. Fijoł, H. N. Abdelhamid, B. Pillai, S. A. Hall, N. Thomas and A. P. Mathew, RSC Adv., 2021, 11, 32408 DOI: 10.1039/D1RA05202K

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