Indonesia Conference Directory

Corresponding Author
Anugrah Ricky Wijaya

Institutions
Chemistry Department, FMIPA, Universitas Negeri Malang, Jl. Semarang No. 5 Malang 65145

*Email: anugrah.ricky.fmipa[at]um.ac.id

Abstract
The rapid development of the Psir Putih Beach location indicates the occurrence of environmental pollution that has an impact on human health. Pollution hazards can be overcome by knowing the pollution status of the location. Minerals of Fe are most found in sediments. We used to monitor and assess of Fe using microwave optimized BCR. In optimized leaching process, the variations the size of the sediment particles, pH and concentration of solvents in the oxidation fraction were analyzed to find the maximum assessment. The purposes in this study were, (1) Determination of sampling points and sediment sampling, (2) Preparation of sediment samples, (3) XRF test of sediment samples, (4) Accuracy and precision test of sediment samples by the Optimized Microwave BCR method, (5) Leaching of sediment samples using the optimized microwave BCR method, (6) Analysis of the effect of sediment particle size, pH and solvent concentration on the amount of Fe leached, (7) Analysis of heavy metal contamination factors in Pasir Putih sediments. Sediment particle size, pH and solvent concentration in the reduction fraction influenced the yield of Fe leaching. Fe concentration in sediments were recorded of 200 mesh more higher comparing those in 100 mesh. Concentrations of 0.5 M and pH of NH2OH. HCl were 1.5 times higher compared to other treated concentrations. The amount of Fe in the location of the Pasir Putih was still below the threshold indicating no pollution in the waters of the Pasir Putih Beach.

Keywords
Sediment, Fe, mesh, BCR, fraction, leaching

Topic
Geochemistry

Link: https://ifory.id/abstract/fAYUbH8vrWm7

Corresponding Author
Handoko Teguh Wibowo

Institutions
Geological Engineering Department, UPN “Veteran” Yogyakarta

Abstract
The eruption of Sidoarjo hot mudflow (LUSI) has occurred more than 13 (thirteen) years and there are no signs of stopping. Lusi eruption is still active and characterized by geyser activity along with the release of solid and liquid material (Vanderkluysen et al., 2014). Lusi eruption still has the potential to continue to occur in the future, affecting a larger area. Over time, the initial paradigm of LUSI as a mud volcano turned into a volcano phenomenon. Not only mud and hot steam, this eruption also triggers the release of methane gas around the site of the burst. The results of studies that have been carried out have not been able to reveal explicitly the potential occurrence of volcanism at this time (neovulcanism) which emerged in the Kendeng zone in the East Java Basin. Therefore the birth of LUSI as a geyser and some hot water that appears in the kendeng zones becomes a window as well as a new perspective and challenge about the connection of tectonism and volcanism in a sedimentary basin system. Analysis of the geochemical properties of fluid coming out at LUSI and some geochemical hotspring characters that appear in the Kendeng zone in East Java basin can show fingerprints originating from the process of magmatism or not.

Keywords
tectonics, sedimentary basin, magmatism, geochemical analysis, volcanism.

Topic
Geochemistry

Link: https://ifory.id/abstract/dQLnRJDxg4TF

Corresponding Author
Anugrah Ricky Wijaya

Institutions
Chemistry Department, FMIPA, Universitas Negeri Malang, Jalan Semarang No. 5 Malang, 65145
*Email: anugrah.ricky.fmipa[at]um.ac.id

Abstract
Anthropogenic activity in coastal areas cause environmental pollution by heavy metals. One of the heavy metals that polluted sea waters is iron (Fe), which is contributed from fishing boats and tourism activities. Monitoring and assessments of Fe are important to protect of environment. In order to assessment, we need develop method quickly. This study used a microwave optimized Bureau Community of Reference (BCR) method with variations in solvent concentration and pH to attack Fe at fraction 2. The sample used was sediment from the Pasir Putih Situbondo waters at 5 m below sea level. The results showed that increasing the concentration of solvent at fraction 2 reveals the leaching process of Fe more optimally. In the analysis of the level of Fe pollution to the environment around the Pasir Putih Beach did not indicate the potential for Fe pollution due to anthropogenic activity. Most of the Fe sources in the Pasir Putih Beach area were Fe sourced from nature.

Keywords
Iron, sediment, pH, BCR microwave, Situbondo.

Topic
Geochemistry

Link: https://ifory.id/abstract/QcbyaPhpeWxH

Corresponding Author
Ayi Syaeful Bahri

Institutions
a) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
*nugrahabahri[at]gmail.com
b) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
c) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
d) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
e) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
f) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
g) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
h) Geophysical Egineering Department
Faculty of Civil Engineering, Environment, and Geo Engineering
Sepuluh Nopember Institute of Technology
i) Badan Penelitian dan Pengembangan Daerah
Jl. DR. Wahidin No. 07 A Pacitan
j) PPI Madiun, BPSDM Perhubungan, Kemenhub
Jl. Tirta Raya, Kota Madiun, Jawa Timur 63129

Abstract
The Pringkuku karst area is located at the south-west of East Java. Pringkuku is a transition zone, in the west is the hill karst of mountain sewu and in the east is the structural hills from Gerindulu watershed to the Tegalombo area in the north of Pacitan district. Sampling and sample observations were carried out by considering 4 parameters: structural and non-structural non-clastic limestone from Wonosari Formation (Tmwl) and structural and non structural clastic limestone from Oyo Formation (Tmo). Both of these lithologies were traversed by the fault trending northeast-southwest in the eastern pringkuku region. Non-clastic limestone units consist of calcite and dolomite while clastic limestone units are dominated by calcite. They deposited on shallow-marine zones and have conformity contact. Both of the limestone lithologies undergone process of diagenesis, in non-structural limestones, the crystals still have euhedral forms while in structural units do not have perfect crystalline shapes, almost rounded due to dissolution. Chemical analysis of the two limestones units revealed the content of Ca, MgO and SiO2 and contained dolomite mineral content in several samples from non-clastic units. Based on petrographic studies, clastic units can be classified as lime-packstone and non-clastic units can be classified as lime-boundstone. The results of the petrographic and geochemical analysis showed an increase in quartz content and carbonate micrite in rock samples close to the fault zone and dolomitization in non-clastic units.

Keywords
Petrography; Geochemistry; Oyo Formation; Wonosari Formation; Limestone; Dolomitization

Topic
Geochemistry

Link: https://ifory.id/abstract/7mqZu6jwLH4b

Corresponding Author
SUMARI SUMARI

Institutions
1)Chemistry Department, Universitas Negeri Malang, Indonesia
2)Chemistry Department, Universiti Malaya, Malaysia

Corresponding author: sumari.fmipa[at]um.ac.id

Abstract
Abstract. This study aimed to synthesize zeolite NaX and HX using silica sand as a raw material. Silica purification was carried out using leaching method as a function of immersion time followed by the sol gel method. Purified silica was characterized using X-RF, X-RD and SEM. Synthesis of zeolite-X was carried out using the hydrothermal method by reacting NaOH, Al(OH)3, SiO2 with a mole composition ratio of 58: 58: 134. Synthesized zeolites were characterized using XRD, FT-IR, XRF, SEM, and BET. The results showed that the optimal immersion time is 12 hours where the highest silica yield obtained is 95.1 wt% and after treated with sol gel method is obtained yield of 98 wt% silica. The synthesized zeolite Na-X and H-X had SiO2/Al2O3 molar ratios of 2.94 and 3.14. The existence of the peak of FTIR spectrum at wave numbers of 484, 538, 818, and 999 cm-1 indicates the presence of a specific zeolite functional group which shows the zeolite X framework is formed. The SEM test shows that octahedral crystals are formed which confirmed the zeolite X. The sinthesized zeolite of Na-X and H-X have surface areas respectively of 14.229 m2/g and H-X of 25.147 m2/g.

Keywords
silica, leaching method, sol gel method, hydrothermal method, synthesis of zeolite Na-X and H-X.

Topic
Geochemistry

Link: https://ifory.id/abstract/rMZ9RzCBubXF