Development of an eco-friendly agar extraction technique from the red seaweed Gracilaria lemaneiformis.

摘要: The red seaweed, Gracilaria lemaneiformis growing as an aquaculture bioremediator along the coasts of Liaodong Peninsula, China, was investigated for agar production. An eco-friendly method called photobleaching extraction process developed benefit workers' health and safety environment. native (NA), alkali-modified (AA), chemical-bleached (CA) photobleached (PA), which were extracted using different processes, evaluated their physical chemical properties. PA showed most desirable performances in terms gel strength, gelling temperature, sulfate content 3,6-anhydro-l-galactose content. Among processed agars, strength 1913 g/cm2, highest among increased 8.6% on basis AA. Further we applied this new technique to extract agars from asiatica, similar results obtained with that G. lemaneiformis. This indicates is a feasible species has potential application. During whole pigment declined gradually TOC concentration solution increase irradiation time. mechanism could be elucidated by photolysis theory.