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All Journal Ilmu Perikanan Tropis Nusantara
Ghitarina , Ghitarina
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Agriculture, Biological Sciences & Forestry

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Identification of types and abundance of microplastics in coastal sediments of Tanjung Jumlai Beach, North Penajam Paser Regency, East Kalimantan Mayasari , Siti; Ghitarina , Ghitarina; Mustakim, Mohammad
Jurnal Ilmu Perikanan Tropis Nusantara (Nusantara Tropical Fisheries Science Journal) Vol. 4 No. 1 (2025): Nusantara Tropical Fisheries Science
Publisher : Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jipt.v4i1.1509

Abstract

The existence of microplastics is affected by the many activities in the community related to the use of plastic, as well as uncontrolled disposal of plastic waste so that plastic waste enters the waters through water flows and will degrade into smaller sizes.  This research aims to identify the type, abundance, and composition, as well as determine differences in abundance between types of microplastics in Tanjung Jumlai Beach sediments. Sampling was conducted by drawing a transect line 100 meters long, then dividing it into 5 lanes each measuring 20 meters. Each lane was subdivided into sub-transect boxes measuring 5×5 meters. Then, within each 5×5 meter sub-transect, 1×1 meter sub-transect boxes were created, making 25 sub-transect boxes of 1×1 meter in each 20-meter lane. From these, 5 boxes were selected using randomizer application. Sediment samples that have been processed were then identified using a microscope.  There were three types of microplastics found in Tanjung Jumlai beach, namely 65% fragments with an abundance of 10.340 particles/kg/m2, 19% fiber with an abundance of 2.960 particles/kg/m2, and 16% film with an abundance of 2.580 particles/kg/m2. There is a significant difference in abundance between fragment microplastics and film and fiber microplastics. There is no significant difference in abundance between film microplastics and fiber microplastics found on the coast of Tanjung Jumlai, Penajam Paser Utara Regency, East Kalimantan.
Analysis of Nitrogen and Phosphate Content During High and Low Tides in The Karang Asam Besar River in Samarinda City Tanjung, Muhammad; Ghitarina , Ghitarina; Mustakim, Moh.
Jurnal Ilmu Perikanan Tropis Nusantara (Nusantara Tropical Fisheries Science Journal) Vol. 3 No. 2 (2024): Nusantara Tropical Fisheries Science
Publisher : Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jipt.v3i2.836

Abstract

Rivers are open waters that flow and get input from various human activity discharges such as; settlements, industries that will result in changes in physical, chemical and biological factors in the waters. This can cause damage, disturbance and danger to living things that depend on water resources. This research was conducted in March 2022 in Karang Asam Besar River, Samarinda City, East Kalimantan Province. This study aims to determine the difference in Nitrogen and Phosphate content at high and low tide in Karang Asam Besar River, Samarinda City. Total Nitrogen at the five stations in the Karang Asam Besar River at average values ranged from 13.02-16.45 mg/L and at low tide ranged from 13.20-20.78 mg/L, the highest Nitrogen value at high tide was at Station 2 and the lowest at Station 4, while the highest Nitrogen at low tide was at Station 4 and the lowest at Station 1. Total Phosphate at the five stations at high tide ranged from 0.14-0.19 mg/L and at low tide ranged from 0.18-0.23 mg/L, the highest Total Phosphate value at high tide was at Station 1 and the lowest at Station 4, while the highest Phosphate at low tide was at Station 4 and the lowest at Stations 1, 3 and 5. Nitrogen compounds at each station in the Karang Asam Besar river based on the quality standards of PP No. 82 of 2001, Ammonia has exceeded the quality standard threshold which exceeds 0.5 mg/L. Nitrite does not exceed the quality standard threshold of less than 0.06 mg/L. Nitrate does not exceed the quality standard threshold value of less than 10 mg/L. Phosphate is still within normal levels and there is no pollution by phosphate compounds.
Co-Authors Mayasari , Siti Mustakim, Moh. Mustakim, Mohammad Tanjung, Muhammad