Doni Prakasa Eka Putra
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KAJIAN KANDUNGAN LOGAM BERAT PADA SEDIMEN SUNGAI DI LOKASI PENAMBANGAN EMAS TRADISIONAL, DESA BOTO, KECAMATAN JATIROTO Dwijaya Pa, Efendi Putra; Budianta, Wawan; Eka Putra, Doni Prakasa
PROMINE Vol 7 No 2 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

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Abstract

Traditional and small-scale gold mining, known as ASGM (Small Scale Gold Mining), has been approved forpollution of the environment specifically for watersheds. This research was conducted in Boto Village,Jatiroto Subdistrict, Wonogiri Regency, Central Java Province. This study discusses the analysis ofcomposition and heavy metals and the factors that support heavy metals in the study site. The samplestaken were 22 samples along the river flow in the upstream and downstream areas. Tests of content werenot carried out by the ICP-AES method. Laboratory test results on river sediment samples were thenanalyzed statistically, geoaccumulation index and enrichment factors were calculated. Laboratory test resultsshow that most do not have heavy metal content exceeding the average concentration of heavy metals inriver sediments. The spread of heavy metals in river sediments in the study sites was found to be varied withdifferences in the upstream and downstream areas. In general, upstream areas have higher metal reservescompared to downstream. Distribution of heavy metals for everything that has not been planned, isprocessed by natural processes or human activities. Traditional mining activities contribute significantly incontributing to the addition of Hg, as well as contributing to the increase of other metals, most of which are inthe mineralized area, which fully contains high metal reserves.
SELECTING RELOCATION OF LAND USE IN HOT MUD DISASTER AREA BY APPLYING GEO-ENVIRONMENTAL EVALUATION. CASE STUDY: SIDOARJO, EAST JAVA, INDONESIA Eka Putra, Doni Prakasa; Syauqi, Syauqi; Juwarso, Juwarso; Hendratno, Agus; Wibowo, Handoko Teguh
Journal of Applied Geology Vol 2, No 3 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3476.471 KB) | DOI: 10.22146/jag.7273

Abstract

Since May 29, 2006, a sea of hot mud has been gushing from the ground in Sidoarjo, East Java, 35 kilometers south of Indonesia’s second largest city, Surabaya. Due to this disaster, approximately thousand of people have been forced from their homes because 600 ha of land and villages were submerged, farmland was ruined, businesses and schools closed as the mud inundated the surrounding area. Relocation of the land uses and supporting infrastructures are become important to support the human survivability and environmental sustainability in this disaster area. In order to select the suitable location for land uses and infrastructures, aspect of environmental geology must be concerned. Geo-Environmental parameters such as geological hazards and geological resources are used to select the suitable relocation area. Evaluation of the suitable land uses is conducted by applying simple overlay rating method. Result of this evaluation shows that the relocation of the land uses can be differentiated into three categories; (i) high risk land use/infrastructure, moderate risk land use/infrastructure and low risk land use/infrastructure. Each of these categories have difference map of relocation suitability, however all maps indicate that the suitable relocation area is in the west-part from the hot mud disaster area. Keywords: Hot mud blast, relocation of land uses, geo-environmental evaluation
THE IMPACT OF SANITATION ON GROUNDWATER NITRATE LEVEL IN BANTUL DISTRICT, BANTUL REGENCY, YOGYAKARTA SPECIAL PROVINCE, INDONESIA Heng, Salpisey; Eka Putra, Doni Prakasa; Wilopo, Wahyu
Journal of Applied Geology Vol 2, No 2
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1682.611 KB) | DOI: 10.22146/jag.7255

Abstract

Bantul is one district of Yogyakarta Special Province which residents mostly use on-site sanitation. On-site sanitation is well-known for hot-spot system of nitrate groundwater contamination. It is because the wide-practice of failure of on-site sanitation systems. Besides, the failure of on-site sanitation system, it will depend on the age of settlement, population density, sanitation arrangement and sanitation behavior including water use patterns. Because of this, nitrate has leaked to groundwater and polluted many supply wells surrounding the septic systems. Since the repeated intake of nitrate could cause various acute and chronic effects to human health, especially the infant’s health under 3 months (blue baby syndrome), it is crucial to undertake the study of impact of sanitation on groundwater nitrate level in Bantul district to acquire a better understanding of the effect of settlement age, population density, sanitation arrangement and sanitation behavior on the concentration of nitrate in groundwater. In order to recognize or achieve the understanding of this issue, a methodology is conducted by observation directly to the field, including the measuring of groundwater table and the distance of septic tank to well, and also make the questionnaires for the mentioned parameters. Finally, the result of each factors (Sanitation arrangement, Settlement age, House density) are shown a low relationship with nitrate concentration, although water use patterns does not. However, the combination of these three factors can show up to find out a better correlation than one factor with this nitrate concentration. Although it has a good relationship with nitrate concentration (average), the variation of nitrate concentration from high to low shows a low relationship. Therefore, the importance of groundwater vulnerability cannot be overlooked in explaining the variation in contaminant concentrations because the nitrate concentration in the groundwater does not only depend on contaminant loading but also groundwater vulnerability. Keywords: Groundwater, on-site sanitation, nitrate concentration, contaminant loading
GROUNDWATER VULNERABILITY OF PANDAK AND BAMBANGLIPURO, YOGYAKARTA SPECIAL PROVINCE, INDONESIA Snguon, Leakhena; Eka Putra, Doni Prakasa; Hendrayana, Heru
Journal of Applied Geology Vol 2, No 2
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6629.937 KB) | DOI: 10.22146/jag.7254

Abstract

The study of intrinsic vulnerability of groundwater was generated in order to delineate groundwater protection zone in Pandak and Bambanglipuro, Indonesia, whose mainly water supply is from groundwater. Two methods of vulnerability mapping are chosen for the evaluation; DRASTIC method and Hoelting method. The resulted maps conducted from these method are validated using the actual contaminant concentration through the impact of on-site sanitation, for instance nitrate as it is proved to be very stable contaminants in groundwater. Considered in different hydrogeological setting, these two methods have produced various results at the certain site. However, its reliability has been drawn upon the nitrate concentration at the study areas. Keywords: Intrinsic groundwater, vulnerability, DRASTIC, Hoelting methods, nitrate contamination
COPPER (Cu2+) REMOVAL FROM WATER USING NATURAL ZEOLITE FROM GEDANGSARI, GUNUNGKIDUL, YOGYAKARTA Wilopo, Wahyu; Haryono, Septiawan Nur; Eka Putra, Doni Prakasa; Warmada, I Wayan; Hirajima, Tsuyoshi
Journal of Applied Geology Vol 2, No 2
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (449.767 KB) | DOI: 10.22146/jag.7253

Abstract

Development of indusrialization and urbanization not only increase economic growth but also contribute to the environmental degradation, especially contamination of heavy metals in water. In other side, there are many geological materials have capability to immobilize heavy metals. Therefore, the objective of this research is to know the maximum capacity of natural zeolite from Trembono area, Gunung Kidul regency to immobilize copper (Cu2+) from water and to understand their mechanism. This experiment was carry out by a batch test. The result showed that the maximum capacity of zeolite to immobilize Cu (qmax) is 63,69 mmolCu/kg Zeolite according to Langmuir adsorption equilibrium model. In addition, the capability to immobilize Cu will increases due to decreasing the grain size. The result of this research can be used as an alternative for waste water treatment, especially Cu. Keywords: Removal, copper (Cu2+), natural zeolite, Langmuir isotherm
Engineering geology evaluation for predicting the collapse susceptibility of Sidoarjo hot mud earth levees: A hazard assessment Eka Putra, Doni Prakasa; Juwarso, Juwarso; Karnawati, Dwikorita
Journal of Applied Geology Vol 2, No 2
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.7252

Abstract

Since May 29, 2006, a sea of hot mud has been gushing from the ground in Sidoarjo, East Java, 35 kilometres south of Indonesia’s second largest city, Surabaya. Due to this disaster, approximately thousand of peoples have been forced from their homes because 600 ha of land and villages were submerged, farmland was ruined, businesses and schools closed as the mud inundated the surrounding area. The authorities response was to build containment ‘basins’ or ‘ponds’ by enclosing areas of land within earth dams, or levees. During the heavy rain on the rainy season, the earth dams and ringdykes have overflown and broken regularly, causing the flooding of more land and damaging infrastructures. However, not only in the rainy season, the levees had also collapses during the dry season. Therefore, an engineering geology study was conducted in order to evaluate the geological factors which causes this phenomena. The parameters used for the evaluation are the heterogeniety of lithology under the dams, geological discontinuity which indicated by the occuring of surface cracks and bubbles, and subsidence phenomena which indicated by the vertical displacement. Overlying method was used to build homogeniety zone of engineering geology based on those parameters, and the resulted map was once again overlay with the location of dams collapses. Result of this evaluation shows that the earth dams collapses were highly correlated with the existing geological discontinuities and subsidences, respectively. Based on this study, the susceptible location of earth dams collapses can be predicted and allow engineers to prepare and plan better engineering solution for the high probable collapses points in order to protect land and infrastructures from the damaging hot mud overflown. Keywords: Hot mud disaster, geological factors, homogeniety zone, earth levee failure points, Sidoarjo-Indonesia
JATIBARANG LANDFILL OF SEMARANG CITY: IS IT POTENTIAL AS THE WATER CONTAMINATION SOURCE? Hendrayana, Heru; Eka Putra, Doni Prakasa; T. Putranto, Thomas; Xaixongdeth, Ponhalath
Journal of Applied Geology Vol 2, No 1
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1383.141 KB) | DOI: 10.22146/jag.7233

Abstract

Like other million inhabitants Cities, Semarang which is the capital city of Central Java Province in Indonesia has a problem in solid waste management. One biggest landfill in the City is the Jatibarang Landfill. The landfill operated since 1992 and currently receives the domestic waste of about 337 ton/day with total volume of about 5.2 million m3 of solid waste. It located on the hill slope of sandstone tertiary rocks and relatively closed to the river of Kreo (which is the main source of drinking water for Semarang City). In order to evaluate the potentiality of landfill as the contamination source to groundwater and surface water, the quality of leachates were analyzed and the hydrogeology of the area was re-studied. Result of the study show that the leachates contain high chloride concentration of about 2600 mg/L however low concentration of heavymetals. Hydrogeology study show evidence that this leachate is already enters the groundwater system. However its load to the river can be neglected due to the fact that the chloride mass flux derived from the study area was significantly low comparing to the net river loads. Key Word: landfill, water contamination, chloride, groundwater and surface water interaction
ESTIMATION, REALITY AND TREND OF GROUNDWATER NITRATE CONCENTRATION UNDER UNSEWERED AREA OF YOGYAKARTA CITY – INDONESIA Eka Putra, Doni Prakasa
Journal of Applied Geology Vol 2, No 1
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2390.729 KB) | DOI: 10.22146/jag.7230

Abstract

In the last two decades, urbanization has transformed Yogyakarta City expanding beyond its administrative area with about one million inhabitants. The City sited on shallow unconfined aquifer has rapidly changed without appropriate access to sanitation and piped water supply. Until now, only 9% of the urban population is served by sewers system and less than 30% of urban population have access to clean water which supplied by the local public water-work. Most of the urban population depend on shallow groundwater for much of their water supply. Regards to the massive used of on-site sanitation systems in the city, contamination of nitrate in shallow groundwater is predicted to occur and surveys of domestic dug wells have revealed a widespread nitrate contamination of the groundwater. Comparison of groundwater nitrate and chloride concentration from several old data and the latest data shows clearly an evidence of the increasing of nitrate concentration and nitrate leaching in the shallow groundwater under Yogyakarta City overtime. Considering the trend, it is no doubt that most of nitrate concentration under urbanized area in the Yogyakarta City will be greater than 50 mg/L in the next several years, if appropriate management action to deal with the on-site sanitation system is not conducted.
Removal of mercury (Hg) from contaminated water at traditional gold mining area in Central Kalimantan Wilopo, Wahyu; Rahman, Denizar; Eka Putra, Doni Prakasa; Warmada, I Wayan
Journal of Applied Geology Vol 3, No 2
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.778 KB) | DOI: 10.22146/jag.7189

Abstract

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
Evolution of groundwater chemistry on shallow aquifer of Yogyakarta City urban area Eka Putra, Doni Prakasa
Journal of Applied Geology Vol 3, No 2
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1358.907 KB) | DOI: 10.22146/jag.7188

Abstract

Since 1980s, accelerated by urbanization, Yogyakarta City was shifting to many directions defined by main road networks and service centres. Urbanization has transformed rural dwellings to become urban settlements and generated urban agglomeration area. Until now, new business centres, education centres and tourism centres are growing hand in hand with new settlements (formal or informal) without proper provision of water supply and sanitation system. This condition increase the possibility of groundwater contamination from urban wastewater and a change of major chemistry of groundwater as shallow unconfined aquifer is lying under Yogyakarta City. To prove the evolution of groundwater chemistry, old data taken on 1980s were comparing with the recent groundwater chemistry data. The evaluation shows that nitrate content of groundwater in 1980s was a minor anion, but nowadays become a major anion, especially in the shallow groundwater in the centre of Yogyakarta City. This evidence shows that there is an evolution of groundwater chemistry in shallow groundwater below Yogyakarta City due to contamination from un-proper on-site sanitation system. Keywords: Urbanization, Yogyakarta city, rural dwellings, settlements, agglomeration, contamination, groundwater