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All Journal HAYATI Journal of Biosciences Jurnal Ilmu Pertanian Indonesia ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Perikanan dan Kelautan Journal of Tropical Soils Prosiding Jurnal Wilayah dan Lingkungan Jurnal Ilmiah Pangabdhi Jurnal Kelautan Tropis Jurnal Zarah Omni-Akuatika Jurnal Akuatiklestari Dinamika Maritim Molekul: Jurnal Ilmiah Kimia BUANA SAINS Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan SIMBIOSA Journal of Coastal and Ocean Sciences Makara Journal of Technology Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan Jurnal MAIYAH Scientific Timeline Jurnal Perikanan dan Kelautan

Agung Dhamar Syakti

Universitas Maritim Raja Ali Haji

Author-ID : 437122

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Veterinary Other

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HEAVY METALS (Ni, Cu, Zn AND Cd) CONTENT IN SERUM OF RAT FED GREEN MUSSELS Muhammad Yudhistira Azis; Suryo Gandasasmita; Agung Dhamar Syakti
Journal Omni-Akuatika Vol 11, No 2 (2015): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Green mussel (Perna viridis) can playing role as bio-indicator or biomonitoring agent for heavy-metalcontaminations in the sea. In this research, the concentrations of four elements Ni, Cu, Zn and Cd in P. viridis and in the serum of rat which orally feed by P. viridis were determined by Atomic Absorption Spectrometry (AAS) following dry acid digestion. Parameter analysis was evaluated by determining confidence limit for the obtained results. The result showed that there was a sequence of heavy-metal content in green mussels sample and laboratory rats serum, such as Ni < Cd < Cu < Zn.Keywords: heavy metals, green mussels, laboratory rats serum, AAS

Wave Energy Potential for Development of Renewable Energy in Riau Archipelago Province Risandi Dwirama Putra; Ibnu Kahfi Bachtiar; Tri Nur Cahyo; Mario Putra Suhana; Oksto Ridho Sianturi; Rikoh Manogar Siringoringo; Ni Wayan Purnama Sari; Muhammad Abrar; Ani Suryanti; Satria Agust; Agung Dhamar Syakti
Journal Omni-Akuatika Vol 16, No 3 (2020): Omni-Akuatika Special Issue 3rd Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2020.16.3.857

Energy and electricity demand in Riau Islands is increasing rapidly due to the fast-growing population, urbanization, industrial development, and economic growth. The limitations of energy and electricity in the Riau Islands caused frequent blackouts. To support the high demand for energy and electricity in the Riau Islands, renewable energy is the most suitable alternative energy solution. Renewable energy is not only playing a key role in providing energy but also providing long-term clean and sustainable energy. We investigated the wave energy potential in the Riau Islands Sea in four different consecutive monsoons (North monsoon, East monsoon, South Monsoon and West Monsoon) using ECMWF data during January 2018 to December 2018 with 0.125o x 0.125o and 6 hourly spatial and temporal resolutions. We extracted bathymetry data from NOAA’s database ETOPO1 and forecasting wave characteristics use the SPM (Shore Protection Manual) method. The potential wave energy simulation from significant wave height (Hs) and energy period (Te) was shown in spatial distribution based on different monsoon. Our studies found that the potential wave energy was higher in north monsoon with maximum spatial of wave power density 3.240 – 3.640 kW.m-1. The east monsoon tended to be lower potential wave energy with dominance of wave power density at 0 – 0.127 kW.m-1. Keywords: wave power density, potential wave energy, ECWFM, monsoon

Microplastics Monitoring in Marine Environment Agung Dhamar Syakti
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

This review summarizes the need for future spatiotemporal comparisons of microplastic abundance across marine environment, through standardized methods for microplastic sampling and analysis in sea water, beach and seabed sediment and marine organism. Pretreatment of the sample prior to the elimination of organic matter should be done using appropriate reagents was also described. Extraction of microplastics from environmental matrices is based on the different density of targeted microplastics with saturated salt solutions (NaCl, NaI, CaCl2, ZnCl2 and lithium metatungstate). Quantification can be achieved by microscopic techniques (binocular, stereomicroscope, fluorescence microscope and scanning electron microscope) and discussion on identification methods including FTIR, Pyr-GC/MS and Raman spectroscopy will be provided. This review also endorses the importance of further study regarding the fate and impact of microplastics on marine biota and human health, especially when we acknowledge that co-pollution may occur during the transport on microplastic in marine environment.

Analysis of Carotenoids and the Identification of Mangrove Sediment Bacteria of Segara Anakan, Cilacap Riyanti Riyanti; Meris Rahmawati; Nuning Vita Hidayati; Agung Dhamar Syakti; Ocky Karna Radjasa
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 23, No 4 (2018): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The excessive consumption of artificial dyes can lead to negative effects on human body. Thus, the invention of natural dyes, such as carotenoids, is needed in order to reduce the negative impacts. Carotenoids are yellow, orange, and reddish yellow pigments produced by plants, animals, algae, and microorganisms. This study was aimed to analyze the carotenoid pigments of mangrove sediment bacteria in Segara Anakan, Cilacap, and to identify species of bacteria that can produce carotenoids. Carotenoids were analysed by using Thin Layer Chromatography (TLC) and UV-Vis spectrophotometer. Meanwhile molecular identification of bacteria was carried by 16S rDNA PCR and DNA sequence was analysed through a program called Basic Local Alignment Search Tool (BLAST). The kinship of bacteria was shown in Phylogenetic tree by using Bioedit and MEGA 5 software. Qualitative analysis by using TLC produced several pigments like: β-carotene, β-isorenieraten, lycopene, flavonoids, chlorophyll a, chlorophyll b and a feofitin with Rf value of 0.36-0.95. Quantitative analysis showed that bacteria KH (greenish yellow), KT (dark yellow) and KM (light yellow) produced carotenoids at 95.30 mg.g-1, 110.34 mg.g-1 and 25.349 mg.g-1. KH, KT and KM were suspected to be bacteria known as Streptomyces chartreusis, Bacillus megaterium and Streptomyces chromofuscus with similarity of 99%. Mangrove sediment bacteria had the potential of producing carotenoids as an alternative of eco-friendly natural dyes.

Pengenalan Konsep Eko-eduwisata Mangrove di Desa Wisata Pengudang Kabupaten Bintan Rika Anggraini; Agung Dhamar Syakti; Fadhliyah Idris; Try Febrianto; Harish Wirayuhanto; Mario Putra Suhana
Jurnal Ilmiah Pangabdhi Vol 8, No 1: April 2022
Publisher : LPPM Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/pangabdhi.v8i1.12463

Mangrove ecosystems have functions and benefits that are quite important both physically and biologically. Mangroves can act as natural coastal protectors from damage due to abrasion and large waves and also provide shelter for associated biota. Development of a mangrove ecosystem that can be developed into a tourism area and an environmental-based education center. Pengudang Village has the potential to be developed into a mangrove ecotourism area with its resources and biodiversity. Development into a mangrove ecotourism area is constrained by public understanding of the types of mangroves, benefits and associated biota in the mangrove ecosystem of Pengudang Village. Community service activities carried out aim to provide understanding to the Pengudang Village community about the potential and types of mangrove resources and associated biota. The activity process begins with a survey of the potential of the mangrove ecosystem including recording, identification, and classification of mangrove species. The introduction and socialization of the condition of the man-grove ecosystem was carried out to the coastal community of Pengudang Village. From the results of field identification, it was found that the mangrove condition of Pengudang Village is in good condition with a dense density. Associated biota in mangrove ecosystems vary from gastropods to mammals. The identification results are disseminated to the Pengudang Village community.

Optimization and Performance Test of Oil Spill Dispersant at Bioremediation of Contaminated Soil with Heavy Oil by Bioslurry Technique Muhammad Abdul Aziz; Mohamad Yani; Agung Dhamar Syakti
JOURNAL OF TROPICAL SOILS Vol 25, No 1: January 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i1.1-10

Petroleum industry activities produce waste such as petroleum hydrocarbons which damage to the soil environment due to changes in soil physical, chemical and biological properties. Oil Spill Dispersant (OSD) is a product that can break down waste of oil into small parts so that it can be dispersed naturally. Laboratory experiments aimed to find out optimize and performance test of OSD in the process of bioremediation with using bio-slurry technique on contaminated soil with heavy oil was carried out at Laboratory of Surfactant and Bio-energy Research Center (SBRC), Research and Community Service Institute of Bogor Agricultural University on January - August 2018 using contaminated soil with heavy oil. The experiment used Response Surface Method (RSM) with two factors, namely the incubation time factor (X1) and the Dispersant to oil ratio (DOR) (X2). The observed variables were soil Total Petroleum Hydrocarbons (TPH), pH, total microbes, and Chemical Oxygen Demand (COD) at soil solution. The results showed that the treatment of incubation time and its combination with DOR significantly reduced soil TPH, increased soil acidity, and increased soil total B. megaterium, but did not significantly affect on COD in soil solutions. Optimization of OSD with RSM showed that the higher DOR of OSD and the longer the incubation time, the higher also the rate of biodegradation of TPH. The optimum conditions were reached at DOR of 1.16:1 and incubation time of 7 days which were able to degrade soil TPH of 54.30%. The optimum conditions of soil pH (8.825) was reached at DOR of 1:1 and incubation time of 5 days, as well as the optimum conditions of B. megaterium (8.35 log CFU g-1) was reached at DOR of 0.86:1 and incubation time of 7 days. Oil spill dispersant (OSD) increased COD in soil solution in both uncontaminated and contaminated soils with heavy oil.

MOLECULAR DIAGNOSTIC RATIOS TO ASSESS THE APPORTIONMENT OF PETROLEUM HYDROCARBONS CONTAMINANTION IN MARINE SEDIMENT Agung Dhamar Syakti
Molekul Vol 11, No 2 (2016)
Publisher : Universitas Jenderal Soedirman

As maritime fulcrum nation, in Indonesia, marine environmental analytical chemistry field is still under developed. So that why, this review paper aims to provide basic understanding of the use some molecular diagnostic indices using n-alkanes indexes and polycyclic aromatic hydrocarbons (PAHs) diagnostic ratios to estimate the source of apportionment of the hydrocarbons contamination and origin. The n-alkane chromatograms were then used to characterize the predominance of petrogenic or biogenic either terrestrial or aquatic. Furthermore, characterization allowed to discriminate riverine versus marine input. The occurrence of a broad unresolved complex mixture can be an evidence of biodegraded petroleum residues. For aromatic compounds, the prevalence of petrogenic, pyrolitic, and combustion-derived can be easily plotted by using isomers ratio calculation. This paper thus provides useful information on the hydrocarbon contamination origin, especially in marine sediments. Further researches should be undertaken in order to validate the use of molecular diagnostic ratio with isotopic approach.

The Influence of Meteorology-Oceanography Factors on Spatial Distribution of Oil and Grease Pollutant in Donan Estuary, Cilacap Mukti Trenggono; Melody Virginia; Agung Dhamar Syakti
Journal Omni-Akuatika Vol 14, No 3 (2018): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Donan Estuary is one of the watershed impacted by anthropogenic activities which more particularly from industry and shipping releasing environmental pollutants i.e. oil and grease. Analysis of oil and grease distribution due to meteorology-oceanography factors used spatial analysis method from primary data was taken on June 2017. This research aims to understand the spatial distribution of the concentration of oil and grease in Donan Estuary and to asses the influence of meteorology-oceanography condition on oil and grease distribution. Our research showed oil and grease concentrations varied among the studied area. The higher concentration of oil and grease were found at station 3 while lower concentration was observed at station 12, closed to Penyu Bay. Accordingly, such differences might be due to the different sources of pollutants and different meteorology-oceanography parameter characteristics that affect oil and grease distribution. For instance, oil and grease concentration was inversely proportional to current velocity. Based on tidal current, oil and grease were move forward to the South, West and South East at low tide and move to North and West at high tide. We noted that the direction of wind gave the low influence to oil and grease movement. The high concentration of oil and grease in each station were followed by Total Suspended Solid (TSS) enhancement. On the other hand, temperature has an effect on evaporation process of oil and grease volatile fraction.

Viability Test of Hydrocarbonoclastic Bacteria Consortium Entrapted on Sawdust Material Devia Hartono Puteri; Aditya Hikmat Nugraha; Yeti Darmayati; Agung Dhamar Syakti
Journal Omni-Akuatika Vol 17, No 1 (2021): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2021.17.1.879

Oil spills in the sea are generally prevented in various ways, one of them is the bioaugmentation method through bacterial entrapment on sawdust carriers. The entrapment of bacteria is one of the bacterial immobilization techniques. The potential of bacterial consortium on sawdust is still not widely used, especially in long-term storage. The purpose of this study was to obtain the viability of hydrocarbonoclastic bacterial consortium on sawdust after 0, 7, and 41 days of storage. The bacterial consortium consists of Bacillus aquimaris, B. megaterium, B. pumilus, Halobacillus trueperi, and Rhodobacteraceae bacterium. The samples were tested by culturing the immobilized bacterial consortium of 0, 7, and 41 days on falcon tubes containing crude oil and seawater. The viability of the immobilized bacterial consortium was tested for 28 days (days 0, 7, 14, 21, and 28) by enriched the bacterial populations periodically. The viability test was also supported by the measurement of environmental parameters on the 1st day and the 28th day such as DO, pH, salinity and, temperature. The results show that bacterial consortium in all storage periods was viable on sawdust carriers which related to the high number of bacterial populations on the 28th day. The most viable bacterial consortium on sawdust was the 0-day storage (9.59 x 108 CFU/ml) which was indicated by the increases phase at the end of the day. It was proved that the bacteria are still productive and could degrade petroleum hydrocarbons.

ASSESSMENT OF CADMIUM (Cd) CONTAMINATION IN MUD CRAB (Scylla spp.) AND SEDIMENT FROM SEGARA ANAKAN LAGOON, CILACAP, INDONESIA Feri Susanto; Nuning Vita Hidayati; Agung Dhamar Syakti
Journal Omni-Akuatika Vol 10, No 2 (2014): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The study aimes to examine the accumulation level of selected heavy metal Cd in various of common mud crab (Scylla spp.) samples from Segara Anakan Lagoon-Cilacap. Mangrove crab and sediment samples were taken from Segara Anakan (108046’–109005’E; 7034’–7048’S) and were analyzed using Atomic Absorption Spectrophotometer (AAS). The Cd extent in Scylla spp. varied from 0.084 - 0.273 ppm which still below the European Commission (2006) threshold value (0.5 ppm). On the other hand Cd concentration in sediment for most stations value (0.625 - 1.635 ppm) have exceeded the Interim marine sediment quality guidelines (ISQGs value; 0.7 ppm) except for station 2 and 4. Concerning the sediment, to interpret and assess the contamination status four indices were used, namely Contamination Factor (CF), Enrichment Factor (EF), Pollution Load Index (PLI), and Geoaccumulation Index (Igeo). The results show the Segara Anakan sediment value for CF varied 3.125 - 8.175, EF was 50.481, PLI was 5.381 and Igeo varied 0.319 - 0.736. The finding result shows the Segara Anakan sediment could be considered as moderately polluted.Keywords: cadmium, contamination, scylla, sediment.

Co-Authors Aditya Hikmat Nugraha Amir, Amriansyah Amriansyah Amir Ani Suryanti Ani Suryanti Anugrah, Septian Aras Mulyadi Asrul Sahri Siregar Asrul Sahri Siregar Chandra Joei Koenawan Charlena Dermawati Sihite Devia Hartono Puteri Diah Alviana Doni Apdillah Donny Apdillah Dony Apdillah Endang Hilmi Fadhliyah Idris Febrianti Lestari Feri Susanto Ibnu Kahfi Bachtiar Iswandi Anas Ita Karlina Jaaman, Saifullah Arifin Jelita Rahma Hidayati Jumsurizal Jumsurizal Kadarwan Soewardi Khairil Anam Khodijah Ismail Lily Viruly Lovina, Ronaldy Mario Putra Suhana Mas?ud, Zainal Alim Melody Virginia Meris Rahmawati Moh. Yani Mubarak Mubarak Muhammad Abdul Aziz Muhammad Abrar Muhammad Abrar Muhammad Yudhistira Azis Mukti Trenggono Nadya Adharani Nancy Willian Nevrita, Nevrita Ni Wayan Purnama Sari Ni Wayan Purnamasari Nofrizal Nofrizal Noviana Nurfarida Nuning Vita HIDAYATI Nuning Vita Hidayati Nuning Vita Hidayati Ocky Karna Radjasa Oksto Ridho Sianturi Rika Anggraini Rika Anggraini Rika Kurniawan Rikoh Manogar Siringoringo Rikoh Manogar Siringoringo Risandi Dwirama Putra Riyanti Riyanti Rizki Aulia Ansari RR. Ella Evrita Hestiandari Satria Agust Sigid Hariyadi Suryati Suryo Gandasasmita Thamrin Thamrin Tri Apriadi Tri Nur Cahyo Try Febrianto Viktor Amrifo Vitasari Vitasari, Vitasari Wahyudin Wahyudin Wan, Ahmad Lutfi Wirayuhanto, Harish Yadi Setiadi Yadi Setiadi Yeti Darmayati Yeti Darmayati Yusni Ikhwan Siregar Zainal Alim Mas’ud

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