2 results listed
Several kinds of biomaterials have been examined for bone regeneration and repair practices. Bioactive glass
is one of the most preferred bone repair agents because of its excellent bioactivity property [1]. Recently, the
incorporation of trace elements existing in the human body (e.g. aluminum (Al), calcium (Ca) etc.) to the bioactive
glasses has received a significant amount of attention. Many studies have been performed on the incorporation of
aluminum (Al) and magnesium (Mg) in the bioactive glass systems and it has been shown that the incorporation of these
trace metallic elements has a significant effect on the bioactivity of glasses [2, 3, 4, 5]. In the literature reviews,
commercial silica sources as tetraethyl orthosilicate [6, 7, 8], Belgian quartz sand [9] and silicon dioxide [10] have been
used for bioactive glass production. However, there is a lack of information on the evaluation of waste silica sources for
the production of bioactive glass.
The purpose of this study was to investigate the in vitro bioactivity and biodegradation behaviour of magnesium
(1%) and aluminum (1%) incorporated 45S5 melt-derived bioactive glasses prepared by use of rice hull biosilica. The
behaviour of biosilica based samples was compared with that of its commercial silica-based counterparts. Sodium silicate
solution was extracted from rice hull ash via alkali extraction according to the method of Yucel et al [11]. The bioactive
glasses with the compositions are given in Table 1 were synthesized through the melting process according to a previous
study [12].
International Symposium on Light Alloys and Composite Materials
UHAKS
Sevil Yücel
Bilge Sema Tekerek
Yeliz Elalmış
Pınar Terzioğlu
Burcu Karakuzu İkizler
Biochar is a solid material generally produced by pyrolyzing carbon-rich biomass with little or no oxygen
at relatively low temperatures [1, 2]. Agricultural biomasses and solid wastes are ideal, abundant and low-cost raw
materials for biochar. Muğla has a generous agricultural biomass and solid waste potential. Among them, pine
(Pinus brutia) cones exist every year in large quantities. Biochar is believed to have tremendous potential for
environmental and agricultural practices due to its fascinating properties such as high surface area and excellent
stability [3]. It can be used to remove various contaminants; however, the raw biochar has limited adsorption
capacity. Therefore, there is an increasing trend on the production of modified biochars with novel features and
surface properties [4].
In the present study, to hold advantage of the recent developments a biochar /MgAl-layered double
hydroxide composite was prepared via pyrolysis of pine cone by a modified method of Li et al. [3].
Characterization of original biomass, raw biochar and composite were performed by using various techniques. The
pH and conductivity of the samples were determined according to the European Biochar Certificate- Guidelines
for a Sustainable Production of Biochar [5]. The FTIR spectra of the adsorbents were recorded in the range of
4000-400 cm-1. The morphological properties of the samples were characterized using a by Scanning Electron
Microscope (SEM JEOL JSM-7600 F). The biochar and composite was characterized using X-ray fluorescence
(XRF) spectrometer. The BET surface area of samples was determined by a NOVA 2200e Quantachrome
Instrument. The results showed that the layered double hydroxide particles were successfully loaded onto biochar.
However, further studies should be conducted to determine the adsorption capacity of the composite.
International Symposium on Light Alloys and Composite Materials
UHAKS
Pınar Terzioğlu
Mehmet Emin Duru
Zeynep Molo