Characterization of unsaturated fatty acid sustained-release microspheres for long-term algal inhibition. (February 2015)

• Record Type: Journal Article
• Authors: Ni, Lixiao; Jie, Xiaoting; Wang, Peifang; Li, Shiyin; Hu, Shuzhen; Li, Yiping; Li, Yong; Acharya, Kumud
• Is Part Of: Chemosphere. Volume 120(2015)
• Page Start: 383
• Page End: 390
• Publication Date: 2015-02
• Subjects: Linoleic acid -- Sustained-release microsphere -- Characterization -- Release property -- Algal inhibition efficiency; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2014.07.098
• Languages: English
• ISSNs: 0045-6535

Abstract

Highlights: Harmful algal blooms can lead to serious environment problems. How to develop effective algal inhibitors and control algal blooms is important. A new sustained-release microsphere (linoleic acid) was prepared and characterized. Linoleic acid microsphere had good encapsulation efficiency and release property. Linoleic acid microsphere maybe used as a potential candidate for algal control. Abstract: The unsaturated fatty acid (linoleic acid) sustained-release microspheres were prepared with linoleic acid (LA) using alginate–chitosan microcapsule technology. These LA sustained-release microspheres had a high encapsulation efficiency (up to 62%) tested by high performance liquid chromatography with a photo diode array. The dry microspheres were characterized by a scanning electron microscope, X-ray diffraction measurement, dynamic thermogravimetric analysis and Fourier transform infrared spectral analysis. The results of characterization showed that the microspheres had good thermal stability (decomposition temperature of 236 °C), stable and temperature independent release properties (release time of more than 40 d). Compared to direct dosing of LA, LA sustained-released microspheres could inhibit Microcystis aeruginosa growth to the non-growth state. The results of this study suggested that the LA sustained-release microspheres may be a potential candidate for algal inhibition.