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Ellysa Ellysa
Universitas Gunadarma
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Karakterisasi Performa Adsorben Cangkang Telur Pada Proses Penyerapan Logam Merkuri (Hg) Miftahurrahmah, Miftahurrahmah; Ellysa, Ellysa; Suhendrayatna, Suhendrayatna
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 1 (2024): Published in June 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i1.125

Abstract

Mercury (Hg) is a highly toxic heavy metal with no biological benefits, posing significant environmental and health risks upon exposure. This study investigates the adsorption characteristics of chicken eggshell-derived adsorbents for the removal of Hg from aqueous solutions. The adsorbent preparation involved washing, drying, calcination, and KOH activation. Results indicated that the 170-mesh size adsorbent exhibited the highest adsorption efficiency, achieving a 99.70% removal rate of Hg. adsorption capacity tests revealed values ranging from 79,90 to 88,90 mg/g, conforming to the Indonesian National Standard (SNI) for activated carbon. Functional group analysis using Fourier-Transform Infrared Spectroscopy (FT-IR) identified a significant increase in aldehyde and ketone groups post-activation. The adsorption process reached equilibrium within 90 minutes, with optimal removal efficiency observed at an initial Hg concentration of 3,0 mg/L. These findings suggest that chicken eggshell-based adsorbents are a cost-effective and efficient solution for mitigating Hg contamination in wastewater, offering a sustainable alternative to conventional methods.
ANALISA PENURUNAN PADA TANAH LUNAK AKIBAT TIMBUNAN (Studi Kasus: Kawasan Wisata Ancol Barat) Ellysa Ellysa; Juniarso Juniarso; Andi Asnur Pranata M. H.
Jurnal Ilmiah Desain & Konstruksi Vol 23, No 2 (2024)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/dk.2024.v23i2.13351

Abstract

Permasalahan keterbatasan lahan di wilayah wisata Ancol Barat menjadi kendala seiring berkembangnya wilayah wisata tersebut. Dalam mengatasi keterbatasan lahan tersebut, maka pihak Ancol berencana memperluas lahan parawisata dengan melakukan reklamasi di sekitar perairan pantai wilayah Ancol Barat. Berdasarkan hasil survei penyelidikan tanah didominasi oleh tanah lunak. Pada rencana penimbunan wilayah perairan pantai di wilayah wisata Ancol Barat yang dibangun pada tanah lunak akan digunakan PVD sebagai alat untuk mempercepat penurunan sehingga pelaksanaan konstruksi dapat segera dilaksanakan. Penulisan ini dilakukan berdasarkan data primer yang dilakukan di lokasi rencana wilayah reklamasi dengan melakukan tes tanah di lapangan serta mengambil sampel disturb dan undisturb untuk menguji di laboratorium untuk mendapatkan paramter-parameter yang akan digunakan dalam perhitungan. Berdasarkan hasil yang didapatkan, dapat diketahui bahwa penyelidikan tanah Bore Hole 1 didapatkan perhitungan penurunan tanah tanpa PVD adalah 1,31m, sedangkan waktu yang dibutuhkan untuk mencapai derajat konsolidasi 90% adalah 3,03 tahun. Sementara perhitungan dengan PVD didapatkan waktu penurunan untuk mencapai derajat 90% dengan pola persegi dengan jarak spasi 1m membutuhkan waktu 0,055 tahun (20 hari), pola persegi dengan jarak spasi 1,5m membutuhkan waktu 0,110 tahun (40 hari), pola persegi dengan jarak spasi 2m membutuhkan waktu 0,192 (70 hari), pola segitiga dengan jarak spasi 1m membutuhkan waktu 0,055 tahun (20 hari), pola segitiga dengan spasi 1,5m membutuhkan waktu 0,110 tahun (40 hari), dan pola segitiga dengan jarak spasi 2m membutuhkan waktu 0,164 tahun (60 hari).
ANALISA POTENSI LIKUIFAKSI BERDASARKAN NILAI N-SPT DI BANDARA INTERNASIONAL KUALANAMU MEDAN Juniarso Juniarso; Andi Asnur Pranata M H; Ellysa Ellysa
Jurnal Ilmiah Desain & Konstruksi Vol 23, No 1 (2024)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/dk.2024.v23i1.11170

Abstract

Liquefaction is a phenomenon where soil that was originally solid changes to liquid due to increased pore water pressure during earthquake vibrations. Liquefaction analysis is usually carried out using data from measurements and field analysis, as well as numerical simulations to predict the potential for liquefaction to occur at a location. In liquefaction analysis, there are several methods that can be used, such as the SPT (Standard Penetration Test) method, CPT (Cone Penetration Test). Kualanamu International Airport is an international airport that serves the Mebesarro area and is the central airport of North Sumatra Province. This airport is located in Deli Serdang Regency, 23 km east of Medan city center. In this research, an analysis of the potential for liquefaction in the soil at Kualanamu International Airport will be carried out to prevent damage to the structure above, loss of life and large economic losses. Calculation of liquefaction potential is carried out by comparing the ratio between the maximum cyclic stress and the effective stress on a soil or rock element exposed to cyclic loads (Cyclic Stress Ratio / CSR) with the ratio between the maximum resistive cyclic stress and the effective stress of the soil (Cyclic Resistance Ratio / CRR). The results of the analysis provide information that the potential for liquefaction occurs at a depth of > 1.5m to a depth of > 5m, where the soil above this depth is dominated by sandy soil with an SF value of ≤ 1.0 for each drill point.
Optimization Compresion Strength Of Concrete Using The Deterministic System With Simpleks Method Handayani, Tri; Mandasari, Febry; Ellysa, Ellysa; Pranata MH, Andi Asnur
Jurnal Ilmiah Multidisiplin Indonesia (JIM-ID) Vol. 1 No. 02 (2022): Jurnal Ilmiah Multidisiplin Indonesia (JIM-ID),July
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/esaprom.v1i02.339

Abstract

Scientific computing is the field of science that studies mathematical models and quantitative analysis related to involving the use of computersto assist planners in making decisions. The purpose of this research is to determine the compressive strength of concrete with 2 samples of normal concrete specimens that have K-200 and K-300 quality. This research method is carried out by conducting direct research in the laboratory and optimizing concrete compressive strength with the deterministic system of the simplex method. The Simplex method is used to find the optimal value of a linear program that involves many constraints and many variables (more than two variables). Based on the results of research in the laboratory, the K-200 quality concrete compressive strength of 167 kg / cm2 and K-300 quality concrete obtained 195 kg / cm2 compressive strength, while based on the data obtained through optimization with the simplex method it is known that for K-200 concrete quality a compressive strength of 116.5 kg / cm2 was obtained with material requirements of cement 10.56 kg, water 2.11 kg, fine aggregate 31.73 kg and coarse aggregates 13.05 kg. For K-300 quality concrete, compressive strength is 648.6 kg / cm2 with material requirements cement 2.4 kg, water 1.62 kg, fine aggregate 20.15 kg and crude aggregate 25.04 kg. The value of compressive strength in K-300 concrete is due to the amount of coarse aggregate material used which is much greater than the mix design, which is 25.04 kg. With the magnitude of the compressive strength value followed by the magnitude of material requirements reaching 2 times greater when compared with the results of mix design
ANALISIS PENURUNAN BANGUNAN WATER TANK PADA DEPO CIPINANG Ellysa, Ellysa; Juniarso, Juniarso; Pranata M H, Andi Asnur; Mujahidin, Maulana
Jurnal Ilmiah Desain & Konstruksi Vol 24, No 1 (2025)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/dk.2025.v24i1.14369

Abstract

Penelitian ini dilakukan untuk menganalisis penyebab dan besarnya penurunan bangunan water tank yang terletak di Depo Cipinang, Jakarta. Bangunan ini mengalami kerusakan pada bagian plesteran dan elemen non-struktural lainnya yang diduga sebagai dampak dari penurunan tanah yang tidak merata. Metode yang digunakan dalam penelitian ini meliputi survei visual bangunan, investigasi tanah menggunakan handboring dan uji sondir, serta perhitungan daya dukung dan penurunan berdasarkan teori Terzaghi dan konsep konsolidasi tanah. Hasil penyelidikan menunjukkan bahwa tanah di lokasi terdiri dari lapisan lanau kelempungan dengan karakteristik sangat lunak hingga kaku pada kedalaman tertentu. Beban struktur total sebesar 427,89 ton menghasilkan tegangan sebesar 7,78 t/m², masih berada di bawah daya dukung ijin sebesar 13,34 t/m². Penurunan total yang dihitung adalah 9,60 cm, terdiri dari penurunan segera, konsolidasi primer, dan konsolidasi sekunder. Nilai ini masih memenuhi syarat aman menurut standar SNI 8460:2017. Berdasarkan hasil tersebut, rekomendasi teknis berupa perbaikan ringan pada bagian non-struktural serta pemantauan kondisi geometri bangunan secara berkala dianggap memadai untuk menjamin keberlanjutan fungsi struktur.
Analisis Kandungan Mineral Pasir Pantai Tanjung Pasir Kota Tangerang Menggunakan Difraksi Sinar-X Ellysa, Ellysa; Pranata , Andi Asnur; Handayani, Tri; Suprapto, Heri; Andayani, Relly; Wulan, Asri
Jurnal Ekonomi Teknologi dan Bisnis (JETBIS) Vol. 2 No. 1 (2023): Jurnal Ekonomi, Teknologi dan Bisnis
Publisher : Al-Makki Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57185/jetbis.v2i1.25

Abstract

Identifikasi kandungan mineral pada tanah merupakan hal yang sangat penting agar dapat mengetahui sifat tanah. Salah satu teknik untuk mengetahui mineral yang terkandung pada tanah dapat dilakukan dengan mengunakan alat X-Ray Diffraction (XRD). Tanah pasir merupakan tanah yang tersebar cukup banyak di wilayah Indonesia. Penelitian ini dilakukan untuk mengetahui kandungan mineral Tanah pasir pantai Tanjung Pasir. Sampel tanah pasir pantai Tanjung Pasir diambil pada titik pengambilan sampel yang terletak pada 6o00’54,5”S; 106o40’51,5”E. Uji kandungan mineral dilakukan setelah uji sifat fisik tanah berupa uji kadar air tanah dan uji gradasi saringan. Kandungan mineral pada sampel tanah di uji di Pusat Teknologi Bahan Industri Nuklir - BATAN (Badan Tenaga Nuklir Nasional) yang berlokasi di Serpong. Hasil penelitian menunjukkan bahwa kandungan mineral dalam tanah pasir pantai Tanjung Pasir dapat disimpulkan bahwa tanah pasir tersebut mengandung Magnetite (Fe2+Fe3+2O4) sebesar 62,1 % dan kandungan mineral Quartz (SiO2) sebesar 37,9 %.
PERENCANAAN FONDASI BORED PILE UNTUK TANAH GRANULER PADA GEDUNG APARTEMEN 10 LANTAI DI BOGOR Wulan, Asri; Ellysa, Ellysa; Handayani, Tri; M.H, Andi Asnur Pranata; Andayani, Relly; Laksono, Alya Tasya Putri
Jurnal Cahaya Mandalika ISSN 2721-4796 (online) Vol. 4 No. 3 (2023)
Publisher : Institut Penelitian Dan Pengambangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jcm.v4i3.1761

Abstract

The construction of an apartment building that is used as a residential community has stages of construction work that will support the building to remain strong, stable and safe. Planning a building construction can not be separated from the planning of the foundation that must be calculated and designed properly to support the working load without experiencing shear failure and excessive settlement to ensure the stability of the building. The purpose of this plan is to design a bored pile foundation for the construction of a 10 floors apartment in Bogor. Based on the results of soil investigations in the planning area in Bogor, West Java, it was found that the type of soil was dominant granular soil. In the calculation of the foundation planning using a circular bored pile foundation type with a diameter of 0,7 meters at a depth of 18 meters. Calculation of the axial bearing capacity of single and group piles using the Reese & Wright and Converse- Labarre methods. Calculation of pile settlement using the semi-empirical method and the Vesic method. Calculation of lateral bearing capacity using the Broms method. Based on the calculation results, the bearing capacity of the foundation permit is 113,542 tons with the many piles needed as 132 piles. The pile subsidence in the group is 10,770 cm for the 6 pile group and the largest lateral pile deflection is 1,470 mm. The foundation uses 14D19 longitudinal reinforcement and D16-54 shear reinforcement and pile cap dimensions of 1,1 m – 4,5 m with a thickness of 0.9 m. Budget Plan The cost of planning the bored pile foundation for a 10 floors apartment building in Bogor, the total cost is Rp. 3,160,217,000.000 with a foundation price per pile of Rp. 15,626,817.010.
Co-Authors Agus Dharma Tohjiwa Anastasia Maya Widya Ekaputri Andi Asnur Pranata Andi Asnur Pranata Andi Asnur Pranata M H Andi Asnur Pranata M. H. Asri Wulan Asri Wulan Asri Wulan Asri Wulan Desyandri Desyandri Fani Yayuk Supomo Febry Mandasari Heri Suprapto Heri Suprapto Juniarso Juniarso Juniarso Juniarso Laksono, Alya Tasya Putri M.H, Andi Asnur Pranata Mandasari, Febry Miftahurrahmah Miftahurrahmah, Miftahurrahmah Mujahidin, Maulana Pranata , Andi Asnur Pranata M H, Andi Asnur Pranata MH, Andi Asnur Pranata, Andi Asnur Relly Andayani Relly Andayani Sri Wulandari Suhendrayatna Suhendrayatna Tri Handayani Tri Handayani Tri Handayani Tri Handayani