Extraction of Phytohormones from Waste Coconut Water by Adsorption using Coconut-Shell-Derived Granular Activated Carbon

Author : Borbo, Ellison Elago
Major Adviser : Alfafara, Catalino G.
Major Co-Adviser : Migo, Veronica P.
Committee Members : Capunitan, Jewel A.; Detras, Monet Concepcion M.
Year : 2016
Month : June
Type : Thesis
Degree: BS
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The performance of coconut-shell-derived granular activated carbon (CSD-AC) as an adsorbent for the extraction of phytohormones from waste coconut water was investigated in batch and continuous column adsorption experiments. Parameters useful for scale up were then obtained and the performance was compared with that of a commercially available resin studied by Magboo (2015). Batch adsorption experiments revealed that the adsorption follows a Freundlich isotherm with favourable physisorption and an equilibration time of 1 hour. The adsorbent had an effective loading of 200 g/L and an actual maximum adsorption capacity of 14.58 mL/g. Results from column adsorption experiments showed that higher flow rates tend to reduce the column adsorption capacity due to shorter contact time. A desirable flow rate configuration of 6.22 mL/min with corresponding linear velocity of 1.23 cm/min was chosen for complete adsorption and desorption runs. Relative volumetric loadings of 3.41 and of 1.22 for adsorption and desorption respectively, and a relative maximum adsorption capacity of 4.6 mL/g were obtained. Ethanol extracts from all adsorption experiments were confirmed to have IAA, GA3 and kinetin. CSD-AC was found to be a good adsorbent for phytohormone extraction from waste coconut water, although at a lower performance compared to commercially available resin. But because of the extremely high cost of the resin, CSD-AC can be considered a more cost-effective alternative.

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