Solar irradiation as an alternative bleaching process for agar extracted from Gracilariopsis heteroclada in Iloilo, Philippines-Reference-Cited by-同舟云学术

Solar irradiation as an alternative bleaching process for agar extracted from Gracilariopsis heteroclada in Iloilo, Philippines

Published:2019-07-30 Issue:6 Volume:62 Page:605-613
ISSN:1437-4323
Container-title:Botanica Marina
language:en
Short-container-title:

Author:

Endoma Leonilo F.¹^ORCID,Nacional Loda M.¹,Luhan Rovilla J.²

Affiliation:

1. Institute of Fish Processing Technology, College of Fisheries and Ocean Sciences , University of the Philippines Visayas , Miagao , Iloilo 5023 , Philippines

2. Southeast Asian Fisheries and Development Center , Tigbauan , Iloilo 5023 , Philippines

Abstract

Abstract The current industrial practice of using chemical bleach to achieve the pure white colour of agar is deleterious to both human and environmental health. This study evaluates the potential of solar irradiation as an alternative bleaching process for agar extracted from Gracilariopsis heteroclada in Iloilo, Philippines. The physico-chemical properties of agar obtained from alkaline-treated seaweed after exposure to different bleaching conditions (e.g. solar irradiation, hypochlorite solution, and ultraviolet and fluorescent lights) were examined and compared with commercial bacteriological agar. Photobleaching through solar irradiation produced agar with superior gel strength (1038.61 g cm−2), high 3,6-anhydrogalactose content (41.44%) and low total inorganic sulphate content (1.87%) without compromising agar yield (19.37%). Solar irradiation offers very promising results as a simple, low-cost, environmentally friendly alternative to the chlorine bleaching process for agar extraction.

Publisher

Walter de Gruyter GmbH

Subject

Plant Science,Aquatic Science,Ecology, Evolution, Behavior and Systematics

Link

https://www.degruyter.com/document/doi/10.1515/bot-2018-0120/pdf

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