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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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KAJIAN POTENSI PEMBENTUKAN AIR ASAM TAMBANG DARI TANAH LAPISAN PENUTUP BATUBARA ASAL KABUPATEN TELUK BINTUNI Markus Heryanto Langsa
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.15

Abstract

Acid mine drainage is formed when certain sulfide minerals in rocks are exposed to oxidizing. Upon exposure to oxidizing conditions, these sulfide minerals are oxidized in the presence of water and oxygen to form highly acidic, sulfate-rich drainage. Acidity levels, and metal composition and concentration depend on the type and amount of sulfide mineral and the presence or absence of alkaline materials. If acid mine drainage has formed, it will be very difficult to stop the process as it is a continuous process until one of the reactions runs out. Acidic water containing heavy metals when flowing into rivers, loker or swamps will damage the condition of the ecosystem in the river. This will certainly cause a decrease in water quality. The purpose of this study is to examine the potential for the formation of acid mine drainage based on the acid base balance method. The results obtained in samples A, B1, B2, and C for the pasta pH test were 5.25, 4.20, 4.71, and 3.14, respectively. The results of the other parameters for the four samples were total sulfur contents (0.005%, 0.021%, 0.008%, 0.47%), acid neutralization ability (3.1, 2.82, 2.45, 13.07 kg H2SO4/ton), maximum acidic potential (0.153, 0.643, 0.245, 14.394 kg H2SO4/ton) and acid-base balance expressed as potential acid production (-12.917, -2.177, -3.065, 11,944). Evaluation of sample C data based on acid-base balance values (11.944 kg H2SO4/ton) and KPA/PKM ratio (<2, 0.17) indicating that sample C has the potential to form acid mine drainage if the coal mining process is carried out.
Assessing Biodegradation Susceptibilities of Selected Petroleum Hydrocarbons at Contaminated Soils Markus Heryanto Langsa
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.
AIR LIMBAH LAUNDRY : KARAKTERISTIK DAN PENGARUHNYA TERHADAP KUALITAS AIR Yuliana Yuliana; Markus Heryanto Langsa; Alfhons D. Sirampun
Jurnal Natural Vol. 16 No. 1 (2020): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v16i1.48

Abstract

At present the laundry business is one of the promising businesses with targeted consumers from the upper middle class who do not have much time to wash clothes at home. Like other industries, laundry also produces wastewater that can have a negative impact on the environment if it is not managed properly. This study characterizes laundry wastewater and looks at its effect on the quality to the groundwater/wells close to the laundry business. Water samples include TSS, TDS, Turbidity, pH , COD, BOD, Phosphate, and Detergent parameters analyzed according to SNI and/or the HACH method (DR3900). Characterization of the laundry wastewater samples show a high level of detergent and phosphate parameters ranging from 27,7-39,4 mg/L and 6,1-27,1 mg/L, respectively with the highest levels corresponds to Laundry wastewater samples at Jalan Baru. The detergent and phosphate contents in all well water samples are still below the required quality standard. Although the concentrations of parameters analysed in the laundry wastewater are very high and above the guidance, it is obvious from the well water samples results that there is no effect of laundry waste waters to the quality of ground waters.
ISOTOPIC CHARACTERISATION OF ORGANIC MATERIALS LEACHED FROM LEAVES IN WATER Markus Heryanto Langsa
Jurnal Natural Vol. 8 No. 1 (2009): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Komposisi isotop dari senyawa organik yang berasal dari peristiwa penguraian beberapa jenis daun tumbuhan dalam air bervariasi yang disebabkan perubahan aktifitas mikrobiologi. Nilai rataan d13C sampel daun sebelum perlakuan diperoleh berada pada kisaran nilai d13C tumbuhan daratan secara umum yang menggunakan jalur fotosintesis C3. Komposisi isotop dari senyawa organic yang mengalami penguraian dari daun segar wandoo eucalyptus ditemukan mengalami pengurangan yang kontinyu dari nilai d13C selama tiga bulan periode penguraian. Perubahan nilai d13C juga berhubungan dengan perubahan jenis dan komposisi senyawa makromolekul. Sebagai contoh, lignin yang memiliki nilai d13C rendah berperan dalam menurunkan nilai d13C dari residu sampel setelah periode pengamatan
LACTARAN SESQUITERPEN VELLERAL DARI KULIT BATANG TUMBUHAN DRYMIS BECCARIANA GIBBS. (WINTERACEAE) YANG BERSIFAT SITOTOKSIK DAN ANTIMIKROBA Bimo Budi Santoso; Darma Santi; Markus H. Langsa; Rina Mogea
Jurnal Natural Vol. 8 No. 1 (2009): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v8i1.58

Abstract

Isolation guided by brine-shrimp ( Artemia salina) bioassay from the stem bark of .D. beccariana Gibbs. led to isolate a bioactive compound called Velleral (1) ((3aS,8aS)-2,2,8-trimethyl-3,3a.6.8a-tetrahydro-1H-azulene-5,6-dicarbaldehyde).The structure of this compound was elucidated based on physical and spectroscopic data (UV, IR, , 1H NMR, 13C-NMR and GC-MS). This compound showed significant active in the Artemia salina bioassay with IC50 2.92 µg/mL and exhibited siginificant cytotoxicity against murine P-388 leukemia cells with IC50 3,39 μg /mL.Moreover, the compound exhibited antibacterial and antifungal activity especially against Staphyloccocus aureus ATCC 25923 and Candida albians respectively. This result indicates that stem bark of D. beccariana is a potential source of bioactive compounds.
POLYCYCLIC AROMATIC HYDROCARBONS (PAHs) AS BIOMARKERS FOR ASSESSING BIODEGRADATION SUSCEPTIBILITIES OF CRUDE OIL SPILLED ON SOILS Markus Heryanto Langsa
Jurnal Natural Vol. 7 No. 1 (2008): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Kemudahan mengalami biodegradasi senyawa-senyawa polisiklik aromatik hidrokarbon (PAHs) dalam minyak mentah yang diekstrak dari tanah pada hari ke-0 dan ke-39 telah ditentukan. Sampel tanah yang digunakan dikontaminasikan dengan minyak mentah Barrow sebanyak 5% (w/w) untuk memperoleh sampel tanah yang sama dengan kondisi lingkungannya. Tingkat biodegradasi dari minyak mentah Barrow yang diekstrak dari sampel tanah pada hari ke 0 dan hari ke 39 ditentukan berdasarkan fraksi senyawa PAH yang dianalisis menggunakan GC-MS. Persen perubahan kelimpahan (abundances) terhadap waktu dari beberapa senyawa alkilnaptalena ditentukan untuk mengetahui urutan kemudahan terdegradasinya isomer senyawa-senyawa tersebut. Ditemukan bahwa isomer-isomer 2-metilnaptalena (2-MN) lebih mudah terdegradasi oleh mikrobiologi dibandingkan dengan isomer 1-MN. Analisis GC-MS terhadap sampel minyak mentah Barrow yang asli tidak menunjukkan adanya biodegradasi, namun ketika minyak mentah tersebut ditumpahkan ke tanah dan dibiarkan selama 39 hari pengamatan, minyak mentah tersebut mengalami biodegradasi ke tingkat 2-3.
CHARACTERISATION OF DISSOLVED ORGANIC CARBON (DOC) LEACHED FROM LEAVES IN WATER Markus Heryanto Langsa
Jurnal Natural Vol. 6 No. 1 (2007): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Penelitian ini bertujuan untuk menentukan senyawa organik khususnya organic karbon terlarut (DOC) dari dua spesies daun tumbuhan (wandoo eucalyptus and pinus radiate, conifer) yang larut dalam air selama periode 5 bulan leaching eksperimen. Kecepatan melarutnya senyawa organic ditentukan secara kuantitatif dan kualitatif menggunakan kombinasi dari beberapa teknik diantaranya Total Organic Carbon (TOC) analyser, Ultraviolet-Visible (UV-VIS) spektrokopi dan pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). Hasil analisis DOC dan UV menunjukkan peningkatan yang tajam dari kelarutan senyawa organic di awal periode pengamatan yang selanjutnya berkurang seiring dengan waktu secara eksponensial. Jumlah relatif senyawa organic yang terlarut tergantung pada luas permukaan, aktifitas mikrobiologi dan jenis sampel tumbuhan (segar atau kering) yang digunakan. Fluktuasi profil DOC dan UV254 disebabkan oleh aktifitas mikrobiologi. Diperoleh bahwa daun kering lebih mudah terdegradasi menghasilkan senyawa organic dalam air dibandingkan dengan daun segar. Hasil pyrolysis secara umum menunjukkan bahwa senyawa hidrokarbon aromatic dan fenol (dan turunannya) lebih banyak ditemukan pada residue sampel setelah proses leaching kemungkinan karena adanya senyawa lignin atau aktifitas humifikasi mikrobiologi membuktikan bahwa senyawa-senyawa tersebut merupakan komponen penting dalam proses karakterisasi DOC.
PENGARUH PEMANFAATAN LIMBAH CAIR PABRIK KELAPA SAWIT TERHADAP SIFAT KIMIA DAN FISIKA TANAH PADA LAHAN PERKEBUNAN KELAPA SAWIT MILIK PT.PMP KABUPATEN MAYBRAT Aprilia Regita Sari; Markus Heryanto Langsa; Alfhons Daniel Sirampun
Jurnal Natural Vol. 15 No. 2 (2019): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v15i2.125

Abstract

Palm oil mill effluent (POME) is the most abundant waste produced from palm oil mills. POME waste products from palm oil mills can pollute the surrounding environment. The main objective of this study was to determine the use of POME on soil fertility and increase the growth of oil palm plants and minimize negative impacts on the environment. The results of the research obtained are a combination of primary data (results of analysis carried out in oil palm plantations owned by PT PMP, Maybrat Regency before the POME application) and secondary data (results of analysis carried out at Angsana Estate oil palm plantations, South Kalimantan after POME application). The results obtained indicate that generally after the application of POME to the land will increase the value of the bulk density and decrease the value of soil porosity and soil permeability. There was a decrease in the percentage of soil porosity in the application area (LA, 28.75% and Flatbed, 23.47%) compared to without application (LK, 36.83%) in the soil depth up to 30 cm. On soils with a deeper depth (30-60 cm) the percent of land subsidence is almost the same as at a depth of 30 cm. Conversely, the addition of POME in the land application (LA) had an impact on the increase in bulk density (1.81 g / cm3) and soil permeability (4.16 cm / hour) compared without POME (LK) (1.48 g / cm3 and 4.08 cm / hour) for soil samples to a depth of 30 cm. The POME application increases the availability of organic matter (C-organic and nitrogen) in the surface soils. The highest P-available values ​​are seen at a depth of 0-20 cm and 20-40 cm in the flatbed. Also, POME on oil palm land tends to increase nutrient content in oil palm leaves compared to control land (without POME).
PENGARUH PEMANFAATAN LIMBAH CAIR PABRIK KELAPA SAWIT TERHADAP KUALITAS AIR PADA LAHAN KELAPA SAWIT PT. PMP DI KABUPATEN MAYBRAT Kristina Daundi; Markus Heryanto Langsa; Alfhons Daniel Sirampun
Jurnal Natural Vol. 17 No. 2 (2021): JURNAL NATURAL
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v17i2.148

Abstract

Palm oil mill effluent (LCPKS) is waste produced from fresh fruit bunches of oil palm. Utilization of LCPKS as liquid fertilizer can help the growth of oil palm plants and increase the production of fresh fruit bunches. The purpose of this study was to determine the characteristics of LCPKS in maturity ponds or contact ponds that will be used as liquid fertilizer in oil palm plantations and the effect of LCPKS on groundwater and surface water quality in plantation areas. Secondary data (results of analysis conducted at PT. MSIP's oil palm plantation, Bengkayang Regency) were used to compare the impact of LCPKS after application. The characterization of LCPKS showed a significant decrease in pollutant levels when compared to the average range of untreated sewage pollutant levels. The BOD level of LCPKS in the final treatment pond was 5270 mg/L (almost meeting the quality standard value of 5000 mg/L) compared to the average level of BOD without treatment (21280 mg/L). The application of LCPKS to land can affect the environment, which has the potential to reduce the quality of ground water and surface water. The decline in water quality is indicated by an increase in the value of the pollution index and the status of water quality.
Komposit Kitosan-Silika Abu Sekam Padi Sebagai Pupuk Lepas lambat Fe2+ dan Mn2+ Bertha Mangallo; Roy Klivorth Max Raturoma; Markus Heryanto Langsa
Jurnal Natural Vol. 17 No. 2 (2021): JURNAL NATURAL
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v17i2.149

Abstract

Penelitian ini bertujuan untuk mengisolasi kitosan dari limbah kulit udang, sintesis komposit kitosan-abu sekam padi sebagai pupuk lepas lambat yang mampu melepaskan unsur hara secara slow release serta menguji pelepasan ion Fe²⁺ dan ion Mn²⁺ dari komposit kitosan-abu sekam padi. Metode yang digunakan untuk mengisolasi kitosan meliputi tahap deproteinasi menggunakan NaOH 2,5% , tahap demineralisasi menggunakan HCl 1,5 N, dan tahap deasetilasi menggunakan NaOH 50%. Rendemen kitosan yang dihasilkan dari cangkang udang asal Bintuni adalah 58,63%. Uji pelepasan Fe²⁺ dan Mn²⁺ dari komposit kitosan-abu sekam padi menunjukkan bahwa pelepasan Fe²⁺ dan Mn²⁺ dari media tanah terjadi secara bertahap atau secara perlahan, dimana pelepasan ion Fe²⁺ lebih cepat terlepas dibandingkan dengan ion Mn²⁺ yang disebabkan oleh perbedaan massa atom. Dengan demikian sintesis komposit kitosan-abu sekam padi sebagai pupuk lepas lambat dapat dikatakan mampu melepaskan unsur hara secara perlahan
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 Sonya Tururaja Yuliana Yuliana