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All Journal Jurnal Chemurgy Ilmu Perikanan Tropis Nusantara
Mustakim, Mohammad
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Environmental Science

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Water quality analysis during tidal conditions using the Pollution Index Method in the Karang Mumus River, East Kalimantan Prasetyo, Wahyu Agus; Hamdhani, Hamdhani; 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.v4i1.1166

Abstract

The Karang Mumus River, located in East Kalimantan, serves as an essential resource for the local community, supporting fisheries, trade, and household activities. However, these uses contribute to waste accumulation, potentially impacting the river's water quality. Tidal movements play a crucial role in water circulation, with the river's flow influenced by the Mahakam River’s tides, leading to backwater flow during high tide. This tidal phase affects the dispersion of pollutants. This study aims to assess the water quality, Pollution Index, and variations in water conditions between high and low tide in the Karang Mumus River. Sampling was conducted at three research stations: Station 1 (Gelatik Bridge), Station 2 (Perniagaan Bridge), and Station 3 (Selili Bridge) from September to November 2023. Water quality measurements were performed both in situ (on-site) and ex situ (at the Water Quality Laboratory, Faculty of Fisheries and Marine Science, Mulawarman University). The analysis follows Government Regulation (PP) No. 22 of 2021 on Environmental Protection and Management (Appendix VI). Results indicate that the DO and COD parameters only meet class III-IV water quality standards, while color, temperature, TDS, TSS, BOD, total phosphate, and nitrate comply with class I-IV standards. The Pollution Index (IP) assessment, based on class I-IV quality standards, categorizes the Karang Mumus River as meeting quality standards to lightly polluted, with an IP range of 0.53 - 2.90. According to Minister of Environment Decree No. 115 of 2003, water meeting quality standards has an IP of 0 < IP < 1.0, while lightly polluted water falls within 1 < IP < 5.
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.
ANALISIS STATUS MUTU AIR HULU SUNGAI LAWA MENGGUNAKAN METODE INDEKS PENCEMARAN DAN STORET DI KABUPATEN KUTAI BARAT Sariyadi, Sariyadi; Hamdhani, Hamdhani; Setiawan, Yunianto; Mustakim, Mohammad; Tarigan, Daniel; Hasan, Harjuni; Sarwono, Edhi
Jurnal Chemurgy Vol 10, No 1 (2026): Jurnal Chemurgy-Juni 2026
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v10i1.26661

Abstract

Tujuan penelitian ini adalah mengkaji kualitas air di hulu Sungai Lawa, Kabupaten Kutai Barat, dengan menggunakan metode Indeks Pencemaran (IP) dan STORET. Sungai Lawa memiliki peran ekologis, sosial, dan ekonomi penting bagi masyarakat, namun dalam dua dekade terakhir menghadapi tekanan antropogenik akibat pertambangan batubara, perkebunan, dan pemukiman. Penelitian dilakukan melalui pengukuran parameter fisika, kimia, dan biologi pada tujuh titik selama dua periode.Hasil menunjukkan bahwa metode IP menempatkan mutu air pada kategori cemar ringan dengan skor rata-rata 2,298–2,499. Sebaliknya, metode STORET menghasilkan kategori tercemar sedang dengan skor rata-rata -25, bahkan pada Titik 3 dan Titik 5 masuk kategori tercemar berat. Parameter yang paling berkontribusi terhadap penurunan kualitas air adalah TSS, DO rendah, BOD dan COD tinggi, pH asam, fosfat, serta kontaminasi mikrobiologi berupa Fecal Coliform.Kesimpulan penelitian menegaskan bahwa kualitas air Hulu Sungai Lawa telah mengalami degradasi nyata. IP lebih konsisten untuk analisis tren jangka panjang, sedangkan STORET lebih sensitif terhadap variasi spasial. Penggunaan keduanya secara komplementer memberikan gambaran utuh kondisi mutu air. Strategi pengelolaan DAS berbasis data, restorasi ekosistem, pengendalian limbah, serta integrasi kearifan lokal diperlukan untuk meningkatkan kualitas air menuju kategori baik Kata Kunci: Sungai Lawa, kualitas air, Indeks Pencemaran, STORET, DAS
Co-Authors Daniel Tarigan Edhi Sarwono Ghitarina , Ghitarina Hamdhani, Hamdhani Harjuni Hasan Mayasari , Siti Prasetyo, Wahyu Agus Sariyadi, Sariyadi Yunianto Setiawan, Yunianto