00000caa a22000003i 4500 UP-1685594773862408540 Buklod 20210325125049.0 m | | ta 210325s2019 xx r |||| u|eng d (iLib)UPBAG-00039569160 BAG rda eng ARTICLE-2895 Espiritu, Emilyn Q. author. Assessment of the quantity and quality of microplastics in the sediments, waters, oysters, and selected fish species in key sites along the bombong estuary and coastal waters of Ticalan in San Juan, Batangas by Emilyn Q. Espiritu, Sophia Angeli SN. Dayrit, Annabel Soledad O. Coronel, Natasha Sophia C. Paz, Pilar Isabel L. Ronquillo, Virgil Christian G. Castillo, and Erwin P. Enriquez. 2019. pages 789-801 illustrations, maps 26 cm text rdacontent unmediated rdamedia volume rdacarrier Includes bibliographical references (pages 799-801) Microplastics (or MPs; < 5 mm in size) pollution is largely unstudied in the Philippines. From an environmental sustainability standpoint, it is important to understand the characteristics, abundance, and environmental fate of plastic debris of various sizes, and these include microplastics that are not more easily and readily detected. In this study, we assessed the extent of microplastics contamination in the sediments, waters, oysters, and selected fishes found in the rivers and coastal areas of Ticalan, Batangas, which were identified from water quality parameters as Class C and CS, respectively. The microplastics were extracted from these samples by chemical digestion of the matrix, series of filtration, and separation by flotation through a density gradient to finally isolate the microplastics which were not dissolved by chemical digestion. The isolated samples were imaged by optical microscopy and characterized based on their descriptive attributes. The results showed the presence of microplastics in all the samples tested, which were found mostly in the form of filaments, fragments, films, and pellets - with most showing weathered, degraded, or angular and irregular surfaces. Identification was done through spectral matching of the Fourier transform infrared spectra of isolated fragments with that of known plastics, although identification in some cases is made uncertain by possibility of degradation of the plastics in the environment. The majority of the isolates showed signature absorption bands of the C-H stretching vibrations of polyethylene-based plastics. (Author's abstract) Fishes. FTIR. Microplastics. Oysters. Sediments. Water. Dayrit, Sophia Angeli SN. author. Coronel, Annabel Soledad O. author. Paz, Natasha Sophia C. author. Ronquillo, Pilar Isabel L. author. Castillo, Virgil Christian G. author. Enriquez, Erwin P. author. The Philippine Journal of Science Vol. 148, no. 4, December 2019. Request full-text access via UPB University Library through https://forms.gle/KZjBv7aRtY6jiL5E9 (viewed 25 March 2021) FI UPBAG UPBAG-MAIN ARTICLE-2895 Analytics