Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines

Microplastic pollution is an emerging topic in environmental science. However, information about its prevalence in the freshwater ecosystems is still scarce. This study quantified and identified microplastic form and polymer types from surface sediments of the Molawin River. Sediment samples were co...

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Main Authors:	Jomel S. Limbago, Marion Michael A. Bacabac, Dawn Rosarie M. Fajardo, Camille Rose T. Mueda, Arselene U. Bitara, Karla Louise P. Ceguerra, Maria Riza C. Lopez, Gabrielle Ann V. Posa, Hildie Maria E. Nacorda
Format:	Article
Language:	English
Published:	Mahidol University 2020-12-01
Series:	Environment and Natural Resources Journal
Subjects:	microplastics molawin creek surface sediments fourier-transform infrared spectroscopy
Online Access:	https://ph02.tci-thaijo.org/index.php/ennrj/article/view/240883

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spelling	doaj-e2eecfa2ee5447b79aaf94439a0fd21d2020-12-01T08:12:32ZengMahidol UniversityEnvironment and Natural Resources Journal1686-54562408-23842020-12-01191576710.32526/ennrj/19/2020114Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, PhilippinesJomel S. Limbago0Marion Michael A. Bacabac1Dawn Rosarie M. Fajardo2Camille Rose T. Mueda3Arselene U. Bitara4Karla Louise P. Ceguerra5Maria Riza C. Lopez6Gabrielle Ann V. Posa7Hildie Maria E. Nacorda8Fisheries and Marine Science Department, Cavite State University - Naic Campus, Cavite, PhilippinesGraduate School, University of the Philippines Los Baños, Laguna, PhilippinesGraduate School, University of the Philippines Los Baños, Laguna, PhilippineGraduate School, University of the Philippines Los Baños, Laguna, PhilippinesGraduate School, University of the Philippines Los Baños, Laguna, PhilippinesGraduate School, University of the Philippines Los Baños, Laguna, PhilippinesGraduate School, University of the Philippines Los Baños, Laguna, PhilippinesGraduate School, University of the Philippines Los Baños, Laguna, PhilippinesSchool of Environmental Science and Management, University of the Philippines Los Baños, Laguna, PhilippinesMicroplastic pollution is an emerging topic in environmental science. However, information about its prevalence in the freshwater ecosystems is still scarce. This study quantified and identified microplastic form and polymer types from surface sediments of the Molawin River. Sediment samples were collected from the upstream, midstream, and downstream stations of the river. Isolation of microplastics was performed through a modified granulometric approach, density separation, and filtration. Stereoscopic microscopy and Fourier-transform infrared spectroscopy (FTIR) were conducted to quantify and describe microplastics and identify the polymer types based on the infrared spectrum of absorption, respectively. The highest concentration of microplastics was found in the downstream station, with an average number of 97±12 items/100 g and 47.33±11.39 items/100 g sediment dry weight in the bank and channel, respectively. The isolated microplastics were dominated by ≥100 to ≤200 μm size range. Based on stereoscopic microscopy, microfragments and microfibers were the most common microplastic type, while polyethylene (PE) and polypropylene (PP) were the polymer types identified based on FTIR analyses. This study revealed the presence of microplastics and confirmed the microplastics polymers present in the Molawin Watershed of Makiling Forest Reserve.https://ph02.tci-thaijo.org/index.php/ennrj/article/view/240883microplasticsmolawin creeksurface sedimentsfourier-transform infrared spectroscopy
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Jomel S. Limbago Marion Michael A. Bacabac Dawn Rosarie M. Fajardo Camille Rose T. Mueda Arselene U. Bitara Karla Louise P. Ceguerra Maria Riza C. Lopez Gabrielle Ann V. Posa Hildie Maria E. Nacorda
spellingShingle	Jomel S. Limbago Marion Michael A. Bacabac Dawn Rosarie M. Fajardo Camille Rose T. Mueda Arselene U. Bitara Karla Louise P. Ceguerra Maria Riza C. Lopez Gabrielle Ann V. Posa Hildie Maria E. Nacorda Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines Environment and Natural Resources Journal microplastics molawin creek surface sediments fourier-transform infrared spectroscopy
author_facet	Jomel S. Limbago Marion Michael A. Bacabac Dawn Rosarie M. Fajardo Camille Rose T. Mueda Arselene U. Bitara Karla Louise P. Ceguerra Maria Riza C. Lopez Gabrielle Ann V. Posa Hildie Maria E. Nacorda
author_sort	Jomel S. Limbago
title	Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines
title_short	Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines
title_full	Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines
title_fullStr	Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines
title_full_unstemmed	Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines
title_sort	occurrence and polymer types of microplastics from surface sediments of molawin watershed of the makiling forest reserve, los baños, laguna, philippines
publisher	Mahidol University
series	Environment and Natural Resources Journal
issn	1686-5456 2408-2384
publishDate	2020-12-01
description	Microplastic pollution is an emerging topic in environmental science. However, information about its prevalence in the freshwater ecosystems is still scarce. This study quantified and identified microplastic form and polymer types from surface sediments of the Molawin River. Sediment samples were collected from the upstream, midstream, and downstream stations of the river. Isolation of microplastics was performed through a modified granulometric approach, density separation, and filtration. Stereoscopic microscopy and Fourier-transform infrared spectroscopy (FTIR) were conducted to quantify and describe microplastics and identify the polymer types based on the infrared spectrum of absorption, respectively. The highest concentration of microplastics was found in the downstream station, with an average number of 97±12 items/100 g and 47.33±11.39 items/100 g sediment dry weight in the bank and channel, respectively. The isolated microplastics were dominated by ≥100 to ≤200 μm size range. Based on stereoscopic microscopy, microfragments and microfibers were the most common microplastic type, while polyethylene (PE) and polypropylene (PP) were the polymer types identified based on FTIR analyses. This study revealed the presence of microplastics and confirmed the microplastics polymers present in the Molawin Watershed of Makiling Forest Reserve.
topic	microplastics molawin creek surface sediments fourier-transform infrared spectroscopy
url	https://ph02.tci-thaijo.org/index.php/ennrj/article/view/240883
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Occurrence and Polymer Types of Microplastics from Surface Sediments of Molawin Watershed of the Makiling Forest Reserve, Los Baños, Laguna, Philippines

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