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All Journal Journal of Tropical Soils Jurnal Sumberdaya Akuatik Indopasifik Indonesian Journal of Chemistry Cassowary SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Jurnal Natural Panrita Inovasi: Jurnal Pengabdian Kepada Masyarakat
Markus Heryanto Langsa
Jurusan Kimia FMIPA Universitas Papua
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Environmental Science Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences

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ISOTOPIC CHARACTERIZATION OF ORGANIC MATERIALS LEACHED FROM LEAVES IN WATER OF MUNDARING WEIR DAM Markus Heryanto Langsa
Indonesian Journal of Chemistry Vol 10, No 1 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (295.348 KB) | DOI: 10.22146/ijc.21481

Abstract

This study examined the organic constituents aquatically leached from leaf components of two tree species (wandoo eucalyptus and pinus radiate). In particular this study aimed to assess the stable isotope composition behaviour of dissolved organic carbon (DOC) from the residue leaves after leaching over five months. The changes in the stable carbon and nitrogen isotope compositions of the leached leaves materials were investigated using an elemental analyzer-isotope ratio mass spectrometry (EA-irMS). The stable isotope compositions were found to vary according to microbially-mediated alteration and decomposition. The average  d13C content of the raw plant elements was consistent with the  d13C values of terrestrial plants using a C3 photosynthetic pathway. The isotope compositions of leached materials of wandoo eucalyptus fresh leaf were continually depleted in d13C over the leaching period of three months. These variations correlated well with its DOC profile. Changes in  d13C values may also relate to the differential leaching of the macromolecular precursors of the original material. Lignin, for example, has a typically low  d13C and probably contributed to the decrease of  d13C in residue of the plant materials.
STUDI EFEKTIVITAS PROSES FOTO FENTON DALAM MENURUNKAN ANGKA BAKTERI COLIFORM DI SUNGAI MARUNI KABUPATEN MANOKWARI Aulia Ekamala Wakang Wakang; Markus Heryanto Langsa; Jacson Victor Morin
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.173

Abstract

Permasalahan air bersih masih menjadi hal yang banyak dijumpai di sebagian daerah, sehingga dibutuhkan suatu pengolahan air yang tepat. Foto fenton adalah salah satu metode pengolahan air dengan Advanced Oxidation Process (AOPs) antara reagen fenton (Fe2+/H2O2) dan radiasi sinar UV yang mampu mengurangi konsentrasi kontaminan dan membunuh mikroorganisme dalam air. Tujuan dari penelitian ini adalah untuk menentukan pengaruh daya iradiasi dan waktu penyinaran optimum dalam menurunkan angka bakteri Coliform dengan metode foto fenton di Sungai Maruni Kabupaten Manokwari yang terindikasi mengandung total Coliform melebihi kriteria mutu air. Dari hasil yang diperoleh menunjukkan bahwa setelah proses foto fenton, jumlah bakteri Coliform pada sampel mengalami penurunan secara drastis dari jumlah bakteri awal >1600/100 mL MPN menjadi 0/100 mL MPN (memenuhi kriteria mutu air sebesar 0/100 mL) dalam kondisi optimum yakni pada daya iradiasi 10 Watt dan waktu penyinaran selama 30 menit. Selain menurunnya jumlah bakteri Coliform, kadar Fe2+ pada sampel yang ditambahkan juga menurun sehingga tidak merusak kualitas air.
Pengaruh pembangunan infrastruktur jembatan terhadap kualitas air permukaan di ruas jalan Mameh-Windesi Emma Manjauna; Markus H. Langsa; Hendri Hendri
Cassowary Vol 6 No 2 (2023): Juni
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v6.i2.221

Abstract

ABSTRACT: Infrastructure development including the construction of bridges and roads of Trans Papua lines, especially on the Mameh-Windesi section in Manokwari Selatan and Teluk Wondama regency has the potential to reduce environmental quality. The purpose of this study was to determine the impact of the bridge’s construction on the water quality at the bridge construction sites. The impact was measured based on the river capacity to receive the contaminants from the construction activities determined by the quality status of river water using the STORET method. The bridge of Mawin 5 and 6 was selected for this study. The total score for the STORET method for the river at the Mawin 5 and 6 is -10 and -8, respectively. Therefore, the river water’s is categorized as lightly polluted according to Peraturan Menteri Lingkungan Hidup No. 115 of 2003. The high concentrations of suspended solids and turbidity on the river waters after the construction was due to the remnants of construction materials entering the rivers as well as the high surface run off. The impact of bridge development on the quality of surface water with the increase of suspended solid and turbidity in the construction sites was temporary with only physical parameters of water impacted.
Penerapan Pakan Ikan Modifikasi Berbahan Baku Ampas Sagu di Kampung Udapi Hilir Kabupaten Manokwari Darma Santi; Tresia Sonya Tururaja; Jacson Victor Morin; Markus Heryanto Langsa
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 12, No 1 (2023): Mei
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v12i1.67652

Abstract

Potensi limbah pengolahan sagu berupa ampas sagu di daerah Manokwari Provinsi Papua Barat perlu terus digali untuk memberikan nilai tambah limbah sekaligus dapat memberikan peningkatan kesejahteraan bagi warga kampung, khususnya peternak lele. Tujuan kegiatan pengabdian ini adalah (1) meningkatkan pengetahuan dan keterampilan peternak lele tentang pemanfaatan limbah di sekitar yang berpotensi sebagai bahan baku pakan alternatif. Selain itu, (2) mengetahui nilai pertumbuhan panjang mutlak, bobot mutlak dan tingkat kelangsungan hidup ikan lele serta kualitas air kolam uji. Metode dalam pengabdian ini dilakukan melalui kolam uji sebagai percontohan penerapan pakan menggunakan ampas sagu. Selain itu, dilakukan uji kualitas air kolam uji serta pengukuran bobot, panjang dan jumlah ikan hidup untuk mengetahui perkembangan ikan. Berdasarkan hasil pengamatan dan pendampingan yang telah dilakukan dapat disimpulkan terjadi peningkatan pengetahuan dan keterampilan petani lele untuk memanfaatkan ampas sagu sebagai alternatif subtituen dedak. Nilai pertumbuhan bobot mutlak sebesar 2,02 gram atau sebesar 80,48%, dan nilai pertumbuhan panjang mutlak menunjukkan sebesar 2,17 cm atau sebesar 31,36%. Tingkat kelangsungan hidup ikan lele sebesar 88%. Kualitas air kolam menunjukkan parameter temperatur dan pH pada kisaran yang sesuai untuk pertumbuhan ikan, yaitu pada 27,5-28,5°C dan pH 7,02-7,51. Data hasil riset ini menunjukkan potensi ampas sagu sebagai substituen bahan baku pakan ikan lele. Kata kunci : ampas sagu;  pakan ikan; Udapi Hilir;  Manokwari
Potensi Pembentukan Trihalometana (THM) Selama Proses Klorinasi pada Air Sungai Maruni dan Air Kali SP 6 di Kabupaten Manokwari Markus Heryanto Langsa; Pramesty Wulan Ramadhanty; Maria Ludya Pulung
Jurnal Sumberdaya Akuatik Indopasifik Vol 7 No 3 (2023): Agustus
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46252/jsai-fpik-unipa.2023.Vol.7.No.3.318

Abstract

The purpose of this study was to determine the potential formation of THM in surface water sources, namely Maruni River water and SP 6 River water in Manokwari Regency. Each sample was characterized for its physical and chemical characteristics including parameters of Total Organic Carbon (TOC), total suspended solids (TSS), ammonia, pH, turbidity, and conductivity (DHL). The ideal/correct concentration for chlorination of water samples is determined based on the need for chlorine which leaves a residual chlorine of 0.5 mg Cl2/L for 24 hours. The TOC content of the Maruni River and SP 6 River water samples were 0.5 mg C/L and 17.2 mg C/L, respectively. Both water samples were chlorinated with chlorine concentrations of 3.44 mg Cl2/L and 10.36 mg Cl2/L, respectively. In Maruni River water, the concentration of THM (read as chloroform) formed was 6.5 µg/L and Kali SP 6 water was 577.5 µg/L. The level of chloroform formed in the Maruni River water sample is very low compared to the required quality standard according to Health of Indonesian Ministry No. 907 of 2002 regarding requirements and monitoring of drinking water quality, which is 200 µg/L, so that the Maruni River water can be treated by chlorine to be used as drinking water.
TRANSESTERIFIKASI MINYAK GORENG BEKAS MENGGUNAKAN KATALIS DARI LIMBAH GERGAJIAN KAYU MATOA (Pometia pinnata): VARIASI RASIO MOL METANOL TERHADAP MINYAK Aronggear, Pitornela Ribka; Santi, Darma; Langsa, Markus Heryanto; Lisna Efiyanti, Lisna Efiyanti
Jurnal Natural Vol. 20 No. 1 (2024): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v20i1.247

Abstract

Utilization of the sawn waste of matoa (Pometia pinnata) wood from Manokwari is carried out to provide an alternative choice of transesterification reaction catalyst sources that utilize wood processing waste materials. This study aimed to determine the character of the synthetic ash material by calcination method at 500 °C. In addition to testing the catalytic activity of synthetic wood ash in the transesterification reaction of used cooking oil, the mole ratio of methanol to used cooking oil was 3:1 and 9:1. The characterization results indicated the alkali metal components, in the form of Na and K, were respectively 20.7750 and 4.8625 mg/L. The content of alkaline earth metals in the form of Ca is 27.3125 mg/L. The percentage yield of transesterification or total methyl ester conversion at a ratio of 3:1 was 47.24%. Product distribution at a ratio of 3:1, namely methyl palmitate (26.34%) and methyl oleate (20.90%). The yield percentage of transesterification or total methyl ester conversion at a ratio of 9:1 was 64.74%. Product distribution at a ratio of 9:1, namely methyl palmitate (31.70%) and methyl oleate (33.04%).
PKM PELATIHAN ECOPRINT BAGI DHARMA WANITA PERSATUAN DINAS KEHUTANAN PROVINSI PAPUA BARAT Santi, Darma; Mangallo, Bertha; Somar, Evelina; Novitasari, Agnes Dyah; Susilowati, Susilowati; Santoso, Bimo Budi; Sirampun, Alfhons Daniel; Sumarna, Sabir; Morin, Jacson Viktor; Langsa, Markus Heryanto; Taher, Achmad; Islam, Muhammad Fajar
Panrita Inovasi: Jurnal Pengabdian Kepada Masyarakat Vol 4, No 1 June 2025
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56680/pijpm.v4i1.72555

Abstract

This training was designed to introduce ecoprint techniques to members of the Women's Dharma Association of the West Papua Provincial Forestry Service, emphasizing its potential as a community-based business opportunity. The activity utilized natural materials readily available in the surrounding environment, such as butterfly pea leaves and flowers, teak leaves, and other local foliage. The training was conducted in stages, beginning with an introduction to the basic concepts of eco-printing, followed by hands-on practice using two main techniques: pounding and steaming. These techniques were applied to cloth tote bags and ceramic mugs. The results showed that participants demonstrated a higher level of proficiency in producing eco prints using the steaming technique compared to the pounding method.
Assessing Biodegradation Susceptibilities of Selected Petroleum Hydrocarbons at Contaminated Soils Langsa, Markus Heryanto
JOURNAL OF TROPICAL SOILS Vol. 15 No. 1: January 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i1.39-47

Abstract

Assessing Biodegradation Susceptibilities of Selected Petroleum Hydrocarbons at Contaminated Soils (M.H. Langsa): The susceptibility to biodegradation of selected saturated hydrocarbons (SHCs), polycyclic aromatic hydrocarbons (PAHs) and asphaltenes in a Barrow crude oil and extracts isolated from soils contaminated with the Barrow crude oil at day 0 and 39 was determined. Soil samples were contaminated with a Barrow crude oil across the surface (5% w/w) as part of a mesocosm experiment in order to mimic similar conditions in the environment.  The extent of biodegradation of the Barrow oil extracted from the contaminated soils at day 0 and day 39 was assessed by GC-MS analyses of SHCs and PAHs fractions. Changes in the relative abundances of n-alkanes (loss of low-molecular-weight hydrocarbons) and pristane relative to phytane (Pr/Ph) and their diastereoisomers were determined. Changes in the diastereo-isomer ratios of Pr and Ph relate to the decrease in abundance of the phytol-derived 6(R),10(S) isoprenoids with increasing biodegradation. The percentage change in abundances of each of selected alkylnaphathalenes with time (day 0 to 39) was determined, enabling an order of susceptibility of their isomers to biodegradation. It was established that the 2-methylnaphthalene isomers (2-MN) is more susceptible to microbial attack than 1-MN isomer indicated by decreasing in percent abundance from day 0 to 39 for the 2-MN isomer. The GC-MS analyses of the original Barrow oil indicated the oil had not undergone biodegradation. When this oil was used in the soil mesocosm experiments the oil was shown to biodegrade to about a level 2 -3 based on the biodegradation susceptibility of the various SHCs and PAHs described above.
Co-Authors Alfhons D. Sirampun Alfhons Daniel Sirampun Alfhons Daniel Sirampun Aprilia Regita Sari Aronggear, Pitornela Ribka Aulia Ekamala Wakang Wakang Bertha Mangallo Bimo Budi Santoso Darma Santi Darma Santi Darma Santi Emma Manjauna Hendri Islam, Muhammad Fajar Jacson Victor Morin Jacson Victor Morin Kristina Daundi Lisna Efiyanti, Lisna Efiyanti Maria Ludya Pulung Morin, Jacson Viktor Novitasari, Agnes Dyah Pramesty Wulan Ramadhanty Rina A. Mogea Roy Klivorth Max Raturoma Santoso, Bimo Budi Sirampun, Alfhons Daniel Somar, Evelina Sumarna, Sabir Susilowati Susilowati Taher, Achmad Tresia Tururaja Yuliana Yuliana