Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

7.164

P-Index

This Author published in this journals

All Journal International Journal of Advances in Applied Sciences MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management ASEAN Journal of Systems Engineering Majalah Forum Teknik UGM Jurnal Penelitian Saintek Inersia : Jurnal Teknik Sipil dan Arsitektur Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan BIOTROPIA - The Southeast Asian Journal of Tropical Biology TAMBANG Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik JURNAL TEKNIK SIPIL ITP ISSN 2354-8452 Majalah Geografi Indonesia Jurnal Ketahanan Nasional Journal of Degraded and Mining Lands Management Jurnal Wilayah dan Lingkungan Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) JPSE (Journal of Physical Science and Engineering) Jurnal Teknologi Mineral dan Batubara Journal of Geoscience, Engineering, Environment, and Technology Journal of the Civil Engineering Forum Jurnal Geomine Indonesian Journal of Chemistry PROMINE Conference SENATIK STT Adisutjipto Yogyakarta Civil and Environmental Science Journal (CIVENSE) Jurnal Otomasi Kontrol dan Instrumentasi Journal of Appropriate Technology for Community Services Respati Community Development Journal: Jurnal Pengabdian Masyarakat Journal of Applied Geology Journal of the Civil Engineering Forum Jurnal Teknik Sipil Institut Teknologi Padang Techno Indonesian Journal of Physics (IJP) International Journal of Disaster Management JAGE BULLET : Jurnal Multidisiplin Ilmu ALTRON Jurnal Teknologi Mineral dan Batubara Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Jurnal Teknologi Sumberdaya Mineral Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir

Wahyu Wilopo

Department Of Geological Engineering, Universitas Gadjah Mada, Indonesia

Author-ID : 418061

Aerospace Engineering Agriculture, Biological Sciences & Forestry 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 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 Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary

Published : 107 Documents Claim Missing Document

Claim Missing Document

Articles

Title

1 2 3 4

Concentration of sheep manure bacteria in the immobilization of arsenic from groundwater using zero-valent Wahyu Wilopo; Keiko Sasaki; Tsuyoshi Hirajim
Journal of Applied Geology Vol 2, No 1 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Permeable reactive barrier column tests were performed to investigate whether anaerobic bacteria in sheep manure could help remove As from groundwater. One column served as a control and was packed with zero-valent iron (ZVI), compost leaf, wood chips, glass beads, and gravel, after which it was sterilized. The other (‘inoculated column’) was packed with the same ingredients, with the addition of sheep manure as a source of anaerobic bacteria. Simulated As-contaminated groundwater was prepared based on groundwater samples from Sumbawa Island, Indonesia, but with the arsenic concentration adjusted to 50 mg/L. The inoculated column was found to remove As more effectively from the simulated groundwater than the sterilized one. A gradual decrease in sulfate concentration was observed in the inoculated column at the rate of 0.26 mmol of sulfate/L/day, suggesting that there was sulfate-reducing activity in the microbial population. In addition, the sulfur isotope ratio showed -4.3 (‰) and 0.2 (‰) in influent and effluent, respectively, indicating that sulfate-reducing bacteria (SRB) consumed δ32S preferentially. Using population size estimates from the most probable number (MPN) method, the population of SRB was found to increase with distance traveled in the column. Profiling the community composition of the bacteria in different fractions of the inoculated column using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) on 16S rRNA sequences suggested that a majority of bacteria were various Clostridium species and one species of Proteobacteria, Geobacter metallireducens GS-15. Some of them may contribute to the removal of arsenic.Keywords: Sheep manure, zero valence iron, arsenic, immobilization, sulfate-reducing bacteria

Removal of mercury (Hg) from contaminated water at traditional gold mining area in Central Kalimantan Wahyu Wilopo; Denizar Rahman; Doni Prakasa Eka Putra; I Wayan Warmada
Journal of Applied Geology Vol 3, No 2 (2011)
Publisher : Geological Engineering Department Universitas Gadjah Mada

There are many traditional gold mining and processing in Murung Raya Regency, Central Kalimantan. The processing of gold mostly uses mercury (Hg) and produces a lot of waste water. It just throws to the river without any treatment. Therefore the concentration of mercury (Hg) in the river water is over than the standard of drinking water and reach up to 0.346 mg dm-3. This situation is very dangerous because almost of the people in the downstream area depend on the river water for their daily purposes. To solve this problem, tuff from local material was used to remove mercury using batch experiment. The result showed that tuff has capability to remove mercury in the significant amount. The main mechanism of mercury removal by tuff is cation exchange processes due to high surface area of tuff. The result of this study can be used as an alternative for waste water treatment in mining area. Keywords: Traditional mining, mercury removal, tuff

Removal Of Copper From Water Using Columns Experiment Of Lignite, Shale, And Ironsand Ty Boreborey; Wahyu Wilopo; Doni Prakasa Eka Putra
Journal of Applied Geology Vol 4, No 1 (2012)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Experimental studies using column testing of lignite, shale, and ironsand in copper solution were carried out to determine the adsorption capacity of lignite, shale, and ironsand in remediation of water contaminated with copper. Lignite, shale, and ironsand were analyzed using XRD, SEM/EDX, and XRF. The treatment process by column adsorption was carried out over a period of 24 hours at a stable velocity of 0.005ml/s. After treatment, the remaining copper in the solution was recorded, thus allowing the adsorption capacity of lignite, shale, and ironsand to be calculated. The results revealed that when the solution was treated by lignite and shale there was a good degree of copper removal, while the ironsand had very poor degree of copper removal. The best material for copper removal was lignite with 25-mesh grain size. Pyrite, graphite, calcite, and illite were found in lignite and smectite, calcite, pyrite, hematite, and illite were found in shale. These materials were also shown to contain an abundance of high-valence elements in Al2O3, SiO2, and Fe3O4 which contributes to additional adsorption capacity. CAC values for lignite and shale reached nearly to 100%, suggesting that lignite and shale have a high adsorption capacity. In contrast, ironsand, which has mostly sand minerals with little clay and organic content, caused the pollutant to move rapidly to the water table, reducing the adsorption potential. CAC values treated by ironsand were shown to be negative which showed an increasing of Cu2+ in natural ironsand into solution. Keywords: Copper, ironsand, shale, lignite, column experiment

Removal Of Lead (Pb2+) From Aqueous Solutions By Natural Bentonite Wahyu Wilopo; Doni Prakasa Eka Putra; I Wayan Warmada; Tsuyoshi Hirajima
Journal of Applied Geology Vol 4, No 1 (2012)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The aim of the present work is to investigate the ability of natural bentonite (untreated) from Pacitan, East Java to remove lead ions from aqueous solution. The bentonite has specific surface area and cation exchange capacity of 27.52 m2 g−1 and 65.20 meq/100 gr of bentonite, respectively. Towards this aim, batch adsorption experiments were carried out and the effect of various parameters on this removal process has been investigated. The effects of pH, grain size of bentonite, adsorption time and lead ion concentration on the adsorption process were examined. The optimum pH for adsorption was found to be 9, with the finer grain size of bentonite is more effective. In adsorption studies, residual lead ions concentration reached equilibrium in a duration of 24 hours. Adsorption of lead on bentonite appeared to follow Freundlich isotherm. Our results demonstrate that the adsorption process was mostly dominated by ion exchange process. Keywords: Removal, lead, aqueous solution, natural bentonite, adsorption.

SITE RESPONSE CHARACTERISTICS OF H/V SPECTRUM BY MICROTREMOR SINGLE STATION OBSERVATIONS AT PALU CITY, INDONESIA Pyi Soe Thein; Subagyo Pramumijoyo; Kirbani Sri Brotopuspito; Wahyu Wilopo; Junji Kiyono; Agung Setianto
Journal of Applied Geology Vol 5, No 1 (2013)
Publisher : Geological Engineering Department Universitas Gadjah Mada

In this study, we estimated predominant period of an H/V spectrum in Palu City, Indonesia, by using microtremor single station observations. Sulawesi Island, eastern Indonesia, is located at the junction between the converging Pacific-Philippine, Indo- Australian Plates and the Eurasian Plate. One of the major structures in Central Sulawesi is the Palu- Koro Fault system, which extends NNW-SSE direction and cross-cuts Sulawesi along more than 300 km from the North Sulawesi trench passing southward through Palu Bay then turn to the southeast, connecting to the Matano and Lawanopo Faults and further eastward both faults join to Tolo trench. Several earthquakes have been known along Palu-Koro Fault system such as Gimpu earthquake (1905), Kulawi earthquake (1907), Kantewu earthquake (1934), and offshore Donggala earthquake (1968) which caused tsunami that destroyed 800 houses and killed 200 people at Donggala district. Palu City, located at the northern tip of Palu depression, is a capital of the Central Sulawesi Province. It is located in the active seismic zone of the Palu-Koro fault. Spectral ratios for horizontal and vertical motion (H/V) from single-station microtremor records were used to identify the predominant periods of the ground vi- brations. Understanding the parameters of predominant period[s] and seismichazard is important for mitigation and environmental planning of the Palu region. Keywords: H/V spectrum, predominant period[s], microtremor single station observation

ESTIMATION OF THE GEOLOGICAL STRENGTH INDEX SYSTEM FOR CAVITY LIMESTONE LAYER IN QUARRY AREA, REMBANG, CENTRAL JAVA PROVINCE, INDONESIA R. Andy Erwin Wijaya; Dwikorita Karnawati; Srijono Srijono; Wahyu Wilopo
Journal of Applied Geology Vol 5, No 2 (2013)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Limestone mining needs a good mine design which is safe for the environment. Mine design is determined by the rock mass quality. The rock mass quality in each mine location is not necessary the same depending on the geological conditions. The research area is located in limestone quarry of Sale District, Rembang Regency, Center Java Province-Indonesia. In the limestone quarry area, there is cavity zone which consists of cavity limestone layer at the wall of quarry bench. This cavity layer in limestone quarry has occurred by solution process. The cavity layer zone is a potentially weak zone which has caused bench failures in the limestone quarry area. The objective of this research is to analyze the rock mass quality in the cavity limestone layer using Geological Strength Index (GSI) system. Final result of the research is a rock mass characterization, specifically for cavity limestone layer. Keywords: geological strength index, limestone, cavity layer

DETERMINATION OF NUCLEAR POWER PLANT SITE IN WEST BANGKA BASED ON ROCK MASS RATING AND GEOLOGICAL STRENGTH INDEX Irvani Irvani; Wahyu Wilopo; Dwikorita Karnawati
Journal of Applied Geology Vol 5, No 2 (2013)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Indonesian government through the National Atomic Energy Agency has planned to build a nuclear power plant. One of the proposed sites is in West Bangka Regency, Bangka Belitung Archipelago Province. The engineering geology of this area is, however, not fully understood and requires further investigations. Engineering geology investigations were carried out by assessing the rock mass quality and bearing capacity based on field observation and drilling data. The assessment was conducted using Rock Mass Rating (RMR) and Geological Strength Index (GSI) classification. The rock mass in the study area was divided into four units, namely Units of Sandstone, Granite, Mudstone and Pebbly Sandstone. The RMR and GSI values in the study area are influenced by the parameters of discontinuity space density, the slope of discontinuity orientation, grade of weathering and groundwater conditions. The assessment shows that the Granite Unit has the best quality which is shown by the average RMR value of 53 and GSI value of 66. Based on the average RMR value, the Granite Unit is estimated to have cohesion value between 0.2 and 0.3 MPa, friction angle between 25° and 35°, and allowable bearing pressure between 280 and 135 T/m2. Based on the GSI value, the Granite Unit is estimated to have uniaxial compressive strength value between 1.0465 and 183.8 MPa, tensile strength between (-0.0122) and (-5.2625) MPa, rock mass strength values between 24.5244 and 220.351 MPa, and modulus of deformation within a range of 1.73–86.68 GPa. The Granite Unit is considered to be the most appropriate location for the nuclear power plants. Keywords: Nuclear power plant foundation, geological strength index, rock mass rating, rock mass quality

CHEMICAL COMPOSITION AND HYDRAULIC CONNECTIVITY OF SPRINGS IN THE SOUTHERN SLOPE OF MERAPI VOLCANO Johnny Boulom; Doni Prakasa Eka Putra; Wahyu Wilopo
Journal of Applied Geology Vol 6, No 1 (2014)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Springs are easily found in the southern slope of Merapi volcano, Sleman Regency, Yogyakarta Special Province, Indonesia. Springs origins on this location are commonly related to the existing of Merapi Aquifer System, but importance question of all these springs are hydraulic connectivity among them. In response to the issue, the objective of this research is to determine hydraulic connectivity of springs based on their chemical composition. To answer the objectives, measurement of spring discharge and physicochemical properties of spring’s water and sampling of selected spring’s water were conducted on this research in the study area. Water chemistry composition was classify by Kurlov formula and displayed by Fingerprint diagram and Composition diagram. Results show that the chemical compositions of most all spring samples are almost similar and does not significantly different for most properties from upstream to downstream, which are Na–Ca–HCO3 water, only one spring of Umbul Jatiningsih spring had different chemical composition of Ca–Na–Mg– HCO3 water. Based on the Fingerprint diagram and Composition diagram evaluation, the spring’s water can be differentiated into three groups. Group 1 consists of ten springs which have similar chemical composition of Na–Ca–HCO3 and with electrical conductivity ranges between 150 to 200 mS/cm. Group 2 consists only one spring “Umbul Pajangan” which contain similar chemical composition to Group 1 but has significantly higher ions concentration (EC value about 400 mS/cm) and Group 3 consists also only one spring “Umbul Jatiningsih” which has significantly different ionic composition with Group 1 and 2. Regarding on this condition, it can be concluded that Group 1 spring is hydraulically connected and relate to the shallow aquifer system of Merapi Aquifer System. In other side, water of spring “Umbul Pajangan”possibly comes from deeper aquifer system of Merapi Aquifer System and this argument is supported by the spring discharge evaluation. Finally, spring “Umbul Jatiningsih” is originate mainly from different aquifer system of porous limestone aquifer. Keywords: Merapi aquifer system, spring, chemical composition, geological condition

ROCK MASS RATING OF CAVITY LIMESTONE LAYER IN REMBANG, CENTRAL JAVA, INDONESIA R. Andy Erwin Wijaya; Dwikorita Karnawati; Srijono Srijono; Wahyu Wilopo
Journal of Applied Geology Vol 6, No 1 (2014)
Publisher : Geological Engineering Department Universitas Gadjah Mada

mine design. Mine design is determined by the rock mass quality, which varies from one mine location to another, depending on the geological conditions. The research area is located in limestone quarry of Sale District, Rembang Regency, Central Java Province, Indonesia. In the study area, a cavity zone is exposed at the wall of quarry bench and occurs by a solution process. The cavity layer zone is a weak zone which has caused bench failures. The objective of this research is to evaluate the quality of the cavity limestone layer for a safe mine design using Rock Mass Rating (RMR) system. Final result of the research is a rock mass characterization, specifically for the cavity limestone layer. Keywords: Rock mass rating, limestone, cavity layer

LANDSLIDE SUSCEPTIBILITY ASSESSMENT OF KOKAP AREA USING MULTIPLE LOGISTIC REGRESSION Somyot Makealoun; Doni Prakasa Eka Putra; Wahyu Wilopo
Journal of Applied Geology Vol 6, No 2 (2014)
Publisher : Geological Engineering Department Universitas Gadjah Mada

A number of landslides have occured in Kokap SubDistrict, Kulon Progo Regency, Yogyakarta Special Province, Indonesia, which have influenced the communities. The natural disaster is commonly associated with a few days of heavy rainfall events. To mitigate the impact of landslides in this area, a landslide susceptibility assessment needs to be carried out. The main objective of this research is to develop a landslide susceptibility zonation in the research area by applying a logistic regression (LR) method. Field observation was conducted at 68 locations in the research area, in which 46 landslides occured. Data of slope angle, lithology, geologic structure and groundwater conditions were collected. The relationship between landslide occurrence and the slope angle, lithology, geologic structure and groundwater conditions was analysed using the LR method. The analysis results showed a 0.984 standard error, implying a good-fit model. The study area was classified into very low, low, moderate, high and very high landslide susceptibility zones with 0–20%, 20–40%, 40–60%, 60–80%, and 80–100%, respectively, probabilities of occurrence. A 60% area of the total study area was classified as a moderate to very high susceptibility to landslide. From 47 landslides, 80% landslides occured in high and very high landslide susceptibility zones, 17% landslides occured in the moderate susceptibility zone and 2% landslides occured in the low susceptible zone. None of landslides occured in the very low landslide susceptibility zone. The analysis results show that LR method is a very useful method for landslide prediction. Keywords: landslide susceptibility, multiple logistic regression, Kokap Kulon Progo-Indonesia

Co-Authors Abd Karim, Amirul Aiman Adelide Asriati Sekar Rianda Adhi Susanto Adi, Restu Dwi Cahyo Adriansyah, Yan Afandi, Moh Fahri Afrizal Abdi Musyafiq Agung Setianto Agus Aktawan Agus Budhie Wijatna Agus Prasetya Agus Prasetya Ahmad Agus Setiawan Ahmad Agus Setiawan Ahmad Taufiq Ahmad Tawfiequrrahman Yuliansyah Ainul Fatayaatis Salaamah Aisyah Shahirah Juhari Alessandro Pagliaroli AM Lelie Novia W Amalina, Anisa Nur Amirul Aiman Abd Karim Andriyanto Andriyanto Anh Bui, Tuan Ansori, Tirangga Aprilia, Faridha Ardiansyah Arief Budiman Arif Kusumawanto Arrisaldi, Thema Aspriadi, Feri Atikah Zahidah Atmaja, Ammar Dwi Avantio Pramaditya Bayu, Himawan Tri Boreborey, Ty Boulom, Johnny Bramono Dwi Kusumo Budi Nur Cahyo Daris, Pieter Jhon Joshua Deepak Chamlagain Defi Rizkasari Denizar Rahman Dianto Isnawan Didit Hadi Barianto Doni Prakasa Eka Putra Dwi Kusumo, Bramono Dwiana Muflihah Yulianti Dwikorita Karnawati Dwikorita Karnawati Egy Erzagian Ekasara, Adam Raka Emanuel G. Manek Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Esti Handini Fachry Abda El Rahman Fadliansyah, Fandi Fahriza Fawwas Asrory Fajrianto, Rizq Farma Dyva Ferardi Fathan, Teuku Faisal Fatmawati, Nurlaila Feikal Aprieza Ferardi, Farma Dyva Ferian Anggara Fikri Faris Fikri Faris, Fikri Firginawan Surya Wanda Fuady Ahmad Lathif, Iqbal Fuady Ahmad Galeh Nur Indriatno Putra Pratama Giuseppe Lanzo H Setiawan Harry Leo Kharisma Haryono, Septiawan Nur Hendy Setiawan Heng, Salpisey Hermawan, Much. Taufik Tri Heru Hendrayana Hirajim, Tsuyoshi Hirajima, Tsuyoshi I Gde Budi Indrawan I Wayan Warmada Inderawan, Gde Budi Irvani Irvani Irvani, Irvani Irvani, Irvani Irwan Setyaji Johnny Boulom Joko Waluyo Junji Kiyono Junji Kiyono Junun Sartohadi K D Setyawan Keiko Sasaki Kezia Kartika Windya Kezia Kartika Windya Khan, Kamran Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Kiyono, Junji Kusumaningrum, Serafica Btari Christiyani Laowattanabandit, Pipat Lathif, Iqbal Fuady Ahmad Luthfi Effendi Luthfi Effendi Makealoun, Somyot Manixone Thepgnothy Maris Setyo Nugroho Mohammad Kholid Ridwan Mohammad Pramono Hadi Muflih, Ghufron Zaida Muhammad Haikal Razi Muhammad Hidayat Furqon Muhammad Sulaiman Muhammad Zulfikrie Myat Thu Naing Nadia Sekarlangit Nugroho, Sunu Ardhi Nurul Huda Phyu Phyu Thin Puji Pratiknyo Puji Pratiknyo Pujo Widiyantoro, Wahid Pulung Arya Pranantya, Pulung Arya Purnamaningsih, Nur Aini Pyi Soe Thein Pyi Soe Thein Qurrahman, Alfian Hardi R Risanti R. Andy Erwin Wijaya Rahman, Denizar Rama Tri Saksono Ramesh Adhikari Restu Dwi Cahyo Adi Restu Tandirerung Retnaningrum, Endah Retnaningrum, Endah Ridwan Budi Prasetyo Rilo Restu Surya Atmaja Ronggo Sadono Salaamah, Ainul Fatayaatis Salahuddin Husein Salpisey Heng Samodra, Guruh Santie, Putri Anjary Widya Sasaki, Keiko Satoru Kawasaki Sekar Rianda, Adelide Asriati Septiawan Nur Haryono Setiawan, Ahamd Agus Setiawan, Muhammad Anggri Shinta Dwi Novianti Slamet Widodo Somyot Makealoun Soutsadachan Chandalsouk Sri Anggoro Prahastono Srijono ., Srijono Srijono Srijono Srijono Srijono Srijono Srijono, Srijono Su Dar mono Subagyo Pramumijoyo Subagyo Pramumijoyo Subagyo Pramumijoyo, Subagyo Subur Priyono Sudarno, Ignatius Sunarko Sunarko Sunarko Sunarko Surya Damar Sasongko Putro Susatio, Raja Taufiq Muhammad Wijayanto Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Thein, Pyi Soe Thema Arrisaldi, S.T., M.Eng. Thepgnothy, Manixone Tsuyoshi Hirajim Tsuyoshi Hirajima Tsuyoshi Hirajima Tuan Anh Bui Ty Boreborey umi barokah Vienti Hadsari Warmada, Wayan Wawan Budianta Wijayanto, Taufiq Muhammad Wisnu Rachmad Prihadi Yan Adriansyah Yuli Fajarwati Yulianti, Dwiana Muflihah Zuhdi, Rasyid Zulaikha Budi Astuti Zulkifli Zulkifli

Title Search

Found 34 Documents Search Journal : Journal of Applied Geology

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 34 Documents
Search
Journal : Journal of Applied Geology