Article Per Year (5 Year)
p-Index From 2021 - 2026
5.818
P-Index
This Author published in this journals
All Journal BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology International Journal of Science and Engineering (IJSE) Jurnal Sains dan Teknologi JURNAL ENGGANO JFMR (Journal of Fisheries and Marine Research) Jurnal Sains Teknologi dan Lingkungan (JSTL) Acta Aquatica: Aquatic Sciences Journal Jurnal Biologi Tropis Jurnal Laut Khatulistiwa Jurnal Ilmu Kelautan Kepulauan BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Kumawula: Jurnal Pengabdian Kepada Masyarakat Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal Abdi Insani Jurnal Inovasi Pendidikan dan Sains Jurnal Teknologi Lingkungan Lahan Basah Jurnal Ilmiah Sains Ilmu Perikanan Tropis Nusantara Jurnal Pengabdian Pada Masyarakat Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Jurnal Perikanan
Irwan Ramadhan Ritonga
Unknown Affiliation
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Veterinary Other

Published : 38 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 38 Documents
Search

 1   2   3   4 
Cadmium (Cd) Content in Sediments Along the Somber River, Balikpapan City, East Kalimantan Mufidah, Fitriatul; Paputungan, Mohammad Sumiran; Ritonga, Irwan Ramadhan
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4b.10891

Abstract

Human activities in the Somber River area of Balikpapan, such as settlements, industry, shipping, and fisheries, have the potential to cause cadmium (Cd) contamination, threatening the mangrove ecosystem and aquatic biota. This study aimed to determine the concentration and contamination level of Cd in the sediments of the Somber River, Balikpapan. Sediment samples were systematically collected from four stations representing different anthropogenic influences, using a hand corer (50 cm depth). Cadmium concentration was analyzed using Atomic Absorption Spectrophotometry (AAS) following acid digestion. It was found that the Cd concentrations ranged from 0.04 to 1.01 µg/g, with an average of 0.37 ± 0.29 µg/g dry weight. All values were below the national sediment quality guideline. The accumulation of Cd showed an increasing trend with greater sediment depth. The calculated Contamination Factor (CF) indicated low to moderate contamination levels at all stations. Overall, the sources of Cd along the Somber River originate from both natural processes and anthropogenic activities from the land.
Analisis Komparatif Metode FFT Dan Least Squares Dalam Penentuan Komponen Pasang Surut Di Perairan Indonesia Al-Ghifari, Najwan; Budiarsa, Anugrah Aditya; Ritonga, Irwan Ramadhan; Riza, Muhammad; Sihotang, Zetsaona; Mandang, Idris
Jurnal Laut Khatulistiwa Vol. 9 No. 1 (2026): February
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v9i1.103907

Abstract

This study evaluates the performance of Fast Fourier Transform (FFT) and Least Squares (LS) methods in tidal analysis across four strategic locations representing Indonesia's diverse tidal regimes: Belitung, Bontang, Melonguane, and Natuna. Eight principal tidal components (O1, K1, M2, S2, N2, K2, P1, Q1) were analyzed. The results demonstrate that the Least Squares method is significantly superior, achieving an RMSE reduction of 79.2% to 94.0% compared to FFT. While tidal classifications based on Formzahl numbers remained consistent across both methods—identifying diurnal types in Belitung and mixed-prevailing semidiurnal types elsewhere—the LS method provided more precise harmonic constants. These findings recommend the LS method for high-accuracy operational tidal modeling and sea-level prediction in Indonesian waters.
Macrozoobenthos Abundance in Summer Beach Muara Badak, Kutai Kartanegara Regency Midlan Witrawan; Irma Suryana; Irwan Ramadhan Ritonga
Jurnal Ilmiah Sains Volume 26 Issue 1, April 2026
Publisher : Sam Ratulangi University, Manado, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v26i1.56711

Abstract

Macrozoobenthos serves as a sensitive bioindicator for changes in aquatic environmental conditions, particularly in coastal areas vulnerable to anthropogenic pressures. This study aims to identify species composition and analyze the abundance of macrozoobenthos in the Summer Beach area, Muara Badak, Kutai Kartanegara Regency. Sampling was conducted from January to April 2024 at three stations using the line transect and quadrat plot method. The results identified 14 macrozoobenthos species belonging to 10 genera from the class Gastropoda (Babylonia formosae, Eunaticina albosutura, Murex tribulus, Telescopium telescopium, Indothais blanfordi, Cerithidea cingulata, Turritella terebra, Brunneifusus ternatanus, Nassarius olivaceus, Olivella biplicata) and 4 genera from the class Bivalvia (Tegillarca granosa, Geloina expansa, Heteranomia squamula, Chamelea gallina). Ecological index analysis showed moderate diversity (H’), high evenness (E), and low dominance (C) values at all stations. Correlation analysis revealed a strong relationship between phosphate concentration and macrozoobenthos abundance, while the relationship with nitrate was very weak. These findings indicate that phosphate is a key parameter influencing the macrozoobenthos community structure at the study site.
Cemaran Logam Berat pada Kerang Darah (Anadara granosa) dari Perairan Babulu Laut Penajam Paser Utara dan Risiko Terhadap Kesehatan Manusia Erian Febri Satriawan; Marsanda Marsanda; Muhammad Ikhsan Saputra; Mohammad Sumiran Paputungan; Irma Suryana; Irwan Ramadhan Ritonga
Buletin Oseanografi Marina Vol 15, No 2 (2026): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v15i2.82217

Abstract

Perairan Babulu Laut yang terletak di Kabupaten Penajam Paser Utara dikenal sebagai salah satu sentra produksi kerang darah (Anadara granosa) di Kalimantan Timur. Wilayah perairan tersebut memiliki potensi risiko paparan logam berat yang dapat terakumulasi pada jaringan biota laut, sehingga berimplikasi terhadap timbulnya gangguan kesehatan pada masyarakat yang mengonsumsinya. Penelitian ini bertujuan untuk mengetahui kandungan logam berat arsen (As), tembaga (Cu), besi (Fe), mangan (Mn), dan seng (Zn) pada A. granosa serta menilai potensi risiko kesehatan akibat konsumsinya. Penelitian dilaksanakan pada Desember 2024 hingga April 2025 di perairan Babulu Laut Penajam Paser Utara. Analisis kandungan logam berat dilakukan menggunakan Atomic Absorption Spectrophotometry (AAS). Hasil penelitian menunjukkan kandungan As sebesar 0,003–0,973 mg/kg, Cu 0,064–0,133 mg/kg, Fe 2,357–4,519 mg/kg, Mn 0,102–0,205 mg/kg, dan Zn 0,736–0,991 mg/kg. Konsentrasi As, Cu, Mn, dan Zn masih berada di bawah baku mutu berdasarkan beberapa referensi, sedangkan Fe telah melampaui baku mutu yang ditetapkan oleh BPOM (2009). Nilai Estimated Daily Intake (EDI) logam As melebihi Reference Dose (RfD), sedangkan logam lainnya masih berada di bawah nilai RfD sehingga diduga berpotensi menimbulkan efek penyakit. Nilai Tolerable Hazard Quotient (THQ) dan Hazard Index (HI) <1 menunjukkan tidak adanya risiko non-karsinogenik. Namun, nilai Cancer Risk (CR) logam As >1×10⁻⁴ mengindikasikan potensi risiko karsinogenik akibat konsumsi A. granosa dari perairan Babulu Laut Penajam Paser Utara. Oleh karena itu, diperlukan pengelolaan lingkungan pesisir terpadu dan pengawasan keamanan pangan laut, mengingat potensi risiko karsinogenik arsen (As) dari konsumsi jangka panjang A. granosa, terutama pada kelompok anak-anak.
Pelatihan Instrumen Oseanografi Fisika bagi Akademisi: Dukungan untuk Pembelajaran dan Pemantauan Sungai dan Pesisir Berkelanjutan Nanda Khoirunisa; Irwan Ramadhan Ritonga; Zetsaona Sihotang; M. Riza
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 8 No 2 (2026): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v8i2.1678

Abstract

Kegiatan pengabdian ini bertujuan untuk meningkatkan kapasitas akademisi dan tenaga laboratorium dalam pengoperasian serta pengolahan data instrumen oseanografi fisika guna mendukung pembelajaran dan pemantauan wilayah sungai dan pesisir secara berkelanjutan. Pelatihan dilaksanakan selama tiga hari melalui pendekatan hands-on training yang terstruktur, mencakup teori dasar, praktik pengambilan data lapangan di Sungai Mahakam, serta pengolahan dan validasi data menggunakan perangkat lunak. Instrumen yang digunakan meliputi Valeport CTD, Current Meter, Tide Gauge, dan ADCP. Evaluasi pelatihan dilakukan melalui pre-test dan post-test, observasi langsung, serta survei pascapelatihan. Hasil analisis gain score menunjukkan peningkatan kompetensi yang signifikan (rerata 0,74) yang tergolong dalam kategori tinggi. Selain itu, 85% peserta melaporkan telah menerapkan keterampilan yang diperoleh dalam kegiatan akademik dan riset mereka. Dampak lanjutan dari pelatihan ini mencakup pemanfaatan data oleh pemerintah daerah dan adopsi metode pelatihan oleh beberapa fakultas dalam pengembangan kurikulum kelautan. Kegiatan ini menunjukkan bahwa pelatihan teknis berbasis praktik nyata mampu menjadi model efektif dalam penguatan kapasitas SDM kelautan, khususnya di wilayah Indonesia Timur.
Analysis of Lead (Pb) content in the tissues of kipar fish (Scatophagus argus) from the Waters of Muara Pantuan Village, Kutai Kartanegara Regency Muhammad Maksum Musyarif; Ristiana Eryati; Irwan Ramadhan Ritonga
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 13: No. 1 (April, 2026)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v13i1.26099

Abstract

The spotted scat (Scatophagus argus) is a nutrition source in the waters of Muara Pantuan, Mahakam Delta. However, anthropogenic activities from land have caused Lead (Pb) contamination in these waters, which has the potential to accumulate in fish. The purpose of this study was to determine Pb concentrations in various tissues of the spotted scat and analyze the associated human health risks from its consumption. A total of 8 fish samples were collected from Muara Pantuan waters with the assistance of local fishermen. Gill, digestive organ, and muscle tissues were digested using the acid digestion method, and Pb concentrations were analyzed using an Atomic Absorption Spectrophotometer (AAS) type iCE 3000. The results show the highest Pb concentration was found in the gills (0.04 ± 0.01 µg/g dry weight), while the lowest was in the digestive tract (0.03 ± 0.01 µg/g dry weight). The mean Pb concentration across all fish tissues ranged from 0.02 to 0.05 µg/g dry weight, which remains below the Indonesian National Agency of Drug and Food Control's (BPOM) standard of 0.20 µg/g. Correlation analysis between Pb and length (r = 0.80) and weight (r = 0.75) of the spotted scat showed a negative relationship with a strong correlation coefficient, but the relationship was not significant (p > 0.05). The Maximum Weekly Intake (MWI) calculation yielded the highest safe consumption limit for the adult group (43.8 kg/week), followed by adolescents (35.7 kg/week), and children (10.9 kg/week). Based on Pb concentration and health risk analysis, the spotted scat from Muara Pantuan waters is still considered fit and safe for human consumption. Keywords: Fish; Heavy Metal; Mahakam Delta; Risk Health
Water Quality Analysis (Physicochemical) Based on the Pollution Index in Pangempang Waters, Muara Badak, Kutai Kartanegara Lana, Achmad Rivaldy; Nurfadilah, Nurfadilah; Ritonga, Irwan Ramadhan
Jurnal Laut Khatulistiwa Vol. 9 No. 2 (2026): July
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v9i2.105642

Abstract

The entry of pollutants into the aquatic environment has the potential to degrade water quality, thereby lowering the water quality status and threatening the survival of aquatic biota. This study aimed to determine the water quality status based on physicochemical parameters in the waters of Pangempang, Muara Badak, Kutai Kartanegara. Observations were conducted at six stations, located both inside and outside the bay using a combination of field measurements and laboratory analyses. Physical parameters observed included temperature, transparency, current, and turbidity, while chemical parameters included BOD₅, dissolved oxygen, phosphate, nitrate, pH, and salinity. Water quality assessment utilized the Pollution Index method, referencing the State Minister for the Environment Decree No. 115 of 2003, with marine biota quality standards based on the State Minister for the Environment Decree No. 51 of 2004. The results indicated that certain parameters fell below the quality standards, specifically dissolved oxygen (3.69 mg/L) and phosphate (0.005–0.023 ± 0.011 mg/L), whereas turbidity (24.1 NTU) and nitrate (0.095 mg/L) exceeded the standard thresholds, necessitating monitoring. The calculated Pollution Index value was 3.23, indicating that the waters are classified as lightly polluted.
ANALYSIS OF Fe, Mn, AND Zn CONCENTRATIONS IN MANGROVE SEDIMENTS ALONG THE SOMBER RIVER IN BALIKPAPAN CITY Andini Aulia Ayuk Ashar; Mohammad Sumiran Paputungan; Hamdhani Hamdhani; Irwan Ramadhan Ritonga
Vol 15 No 1 (2025): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v15i1.1408

Abstract

Somber River is one of the rivers with mangrove ecosystem in Balikpapan city. The high human activity in Somber River area may produce waste and heavy metal pollution in mangrove ecosystem, especially in sediment. The purpose of this study is to determine the concentration of Fe, Mn and Zn in mangrove sediments. In addition, the values of pollution indices such as contamination level (TK), pollution load index (IBP) and geoaccumulation index (I-Geo) in sediments are also determined along Somber river, Balikpapan city. The research method used in this study is purposive sampling. Sediment samples were taken from 9 sampling points along Somber river. Sediment samples were deconstructed using acid and analyzed using the Atomic Absorption Spectrophotometer (AAS) Aurora AI 1200 to determine the concentration of Fe, Mn, and Zn based on dry weight in µg/g. Based on the analysis, it was found that the Fe concentration in the sediment ranged from 5403 to 12268 µg/g with an average of 9462 ± 2294 µg/g. In Mn, the concentration value was between 2,25 and 23,2 µg/g with an average of 11,4 ± 7,43 µg/g. Then, the Zn concentration was between 16,6 and 61,3 µg/g, with an average of 43,4 ± 17,4 µg/g. The varying concentrations of Fe, Mn and Zn might be related to several human activities, such as industrial activities, boat docks, settlements, fisheries, ports and metal distribution from the Somber river. The concentrations of Mn and Fe at all research stations were lower than the sediment quality standards, except for Fe. The level of Fe, Mn and Zn contamination in sediments was low (TK<1) and not polluted (IBP<1) and the geoaccumulation index (I-geo) was not polluted to polluted (0<I-geo<1).
Co-Authors Adnan . Adnan Adnan Adnan Adnan Agathajani, Brigitha Anjeli Ahmad Ahmad Ahmad Ahmad Ahmad Ahmad Akbar, Rizali Akhmad Rafii Andi Fitri Sakmiana Andini Aulia Ayuk Ashar Andini, Ardita Dwisepti Anindia Resty Syafira Antazilla Rindyani Anugrah Aditya Budiarsa, Anugrah Aprilia, Dita Apriliyani, Vivi Arwadi, Mohammad Tri Arwadi, Tri Ashar, Andini Aulia Ayuk Ayla Nursari Boedi Hendrarto Brigitha Anjely Agatha Jani Bulan, Dewi Embong Clara Frecilia Patiung Dewi Embong Bulan Dharma Saputra, Dharma Dharmawan, I Wayan Eka Elisar Elisar Elisar, Elisar Erian Febri Satriawan Eryati, Ristiana Fadhila Nurhayati Fahrurozi, Zidhan Muhammad Firman , Firman Firman Firman Hamdhani Hamdhani Hamdhani Hamdhani Hamdhani, Hamdhani Idris Mandang, Idris Intan Sari Dewi Irma Suryana Irma Suryana Irma Suryana Irma Suryana Irma Suryana Irma Suryana Iwan - Suyatna Iwan Suyatna Iwan Suyatna Jani, Brigitha Anjely Agatha Khoirunnisa, Nanda Kusumaningrum, Widya Lana, Achmad Rivaldy Loto, Naomi M. Riza Main, Aminullah Aminul Manukrante, Alvionita Marsanda Marsanda Midlan Witrawan Muchlis Effendi Mufidah, Fitriatul Muhammad Ikhsan Saputra Muhammad Maksum Musyarif Muhammad Riza Muthy, Najla Adellia Najwan Al-Ghifari Nanda Khoirunisa Novia, Rani Nur Hasanah Nurdiansah, Doni Nurfadilah Nurfadilah Nurfadilah Nurfadilah Nurfadilah Nurfadilah Paputungan, Mohammad Sumiran Rafi’i, Ahmad Rafi’i, Ahmad Rani Novia Rani Novia Renyaan , Jeverson Rifanka, Muhammad Akbar Ristiana Eryati Ristiana Eryati Ristiana Eryati Ristiana Eryati Ristiana Eryati Ristiana Eryati S. Supriharyono Saputra, Muhammad Ikhsan Silviana Silviana Simanihuruk, Dorsen Hotma Tua Soenarih, Asih Suryana, Irma Susi Rahmawati Suyatna , Iwan Tobing, Binto Iskandar Hasibuan Widya Kusumaningrum Widya Kusumaningrum Zetsaona Sihotang Zetsaona Sihotang