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Penjerapan Natrium pada Hasil Ekstraksi Silika dari Lumpur Panas Bumi Akmal, Afiffurroyan Aflah; Purnomo, Chandra Wahyu; Ariyanto, Teguh
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Geothermal sludge contains silica which can be used as plant fertilizer. Extraction of silica from geothermal sludge can be carried out by the extraction method using sodium hydroxide solution to form sodium silicate. This extraction was conducted by varying the extraction time of 10, 20, 30, 40, 50, 60, 70 and 80 minutes; NaOH concentration of 1,5N; and extraction temperature of 80oC. Extracted silica concentration was analyzed using UV-Vis Spectrophotometry. The best extracted silica content was 158673 ppm under 60 minutes of extraction time, 80oC of extraction temperature, and 1.5N of NaOH concentration. The results of this extraction still contain sodium at a concentration and need to be reduced so that it can be used as fertilizer. The process of reducing sodium concentration using the ion exchange method in a batch system. This process uses variations of initial sodium concentration with a resin mass of 20 grams and temperature of 45oC. From the Atomic Adsorption Spectroscopy (AAS) analysis, the adsorption capacity (qe) increases with increasing the initial sodium concentration. Langmuir's equilibrium provide a match to the adsorption equilibrium experimental data.

Effect of Presence of Ammonia in Aqueous Solution on Urea Adsorption Capacity Using Porous Carbon Prasetyo, Imam; Rahayu, Theresia Evila Purwanti Sri; Ariyanto, Teguh
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 1 No. 01 (2019): JPPL, September 2019
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v1i01.47

Urea is the main source of nitrogen for plants. Conventional urea fertilizer is made by reacting ammonia and carbon dioxide. Wastewater produced by urea fertilizer plants usually contains urea and ammonia in high concentrations. In each m3 of wastewater urea content can reach 650 - 4000 ppm and ammonia amounting to 100 - 1300 ppm. The disposal of wastewater that still contains urea and ammonia with high levels can cause eutrophication in waters which is very detrimental to aquatic organisms. The uptake of urea in the urea fertilizer plant wastewater is an interesting study because it can provide a double benefit of reducing the concentration of urea in wastewater so that it can meet environmental quality standards that are environmentally friendly and obtain cheap urea fertilizer for plants. This study aims to determine the adsorption capacity of urea with porous carbon if there is ammonia in the liquid. Porous carbon is made from pyrolysis of coconut shell which is oxidized with sulfuric acid. The oxidation process is carried out by heating porous carbon which is immersed in a 50% w/w sulfuric acid solution at 90oC for 2 hours. The adsorption process is carried out at room temperature with an initial concentration of urea between 500 - 8000 ppm in a solution of urea-ammonia as a simulated liquid. The results showed that the urea adsorption capacity increased significantly in urea-ammonia solution compared to urea solution with an increase of 41%. The capacity of urea adsorption in urea-ammonia solution is 27 - 444 mg urea / g carbon.

Removal of metronidazole from simulated wastewater using Fe/C catalyst with a combination of heterogenous Fenton and ozonation Panandita, Budi Satria; Prasetyo, Imam; Ariyanto, Teguh
Jurnal Rekayasa Proses Vol 17, No 2 (2023)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.75633

This study examined roles of iron oxide/porous carbon material (Fe/C) for removing metronidazole in simulated wastewater by adsorption and then followed by a degradation using advanced oxidation process (H2O2, O3 and combination of H2O2/O3). Fe/C was produced by an impregnation of iron oxide precursors during resorcinol-formaldehyde synthesis followed by pyrolysis at 800 °C. For comparison, blank carbon (without iron loading) was also synthesized. The properties of porous carbon were investigated by SEM-EDX and N2-sorption analyzer. Blank carbon and Fe/C featured the specific surface area of 755 m2g-1 and 394 m2g-1, respectively. The loading of iron oxide altered the pore structures of material. The adsorption isotherm data were followed by the Langmuir isotherm model with metronidazole uptake up to 46.07 mg g-1 and 39.97 mg g-1 at 30oC by Fe/C and blank carbon. The degradation study was then carried out with catalyst dosage of 0.1 g/100 mL solution and 120 min reaction time at 30 oC. It is noticeably that, the degradation of metronidazole was better when a combination of H2O2/O3 was employed, compared with an individual of H2O2 or O3. Regarding the stability, Fe/C maintained its high activity upon four consecutive runs.

PERTANGGUNGJAWABAN PIDANA NOTARIS DALAM TINDAK PIDANA MEMBANTU MENYURUH MENEMPATKAN KETERANGAN PALSU KEDALAM AKTA OTENTIK Ariyanto, Teguh; Sudarto, Sudarto
IBLAM LAW REVIEW Vol. 4 No. 3 (2024): IBLAM LAW REVIEW
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM IBLAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52249/ilr.v4i3.514

Dalam praktek banyak ditemukan kasus pidana yang berkaitan dengan profesi jabatan Notaris. Keterlibatan notaris dalam suatu perkara pidana disebabkan oleh kelengahan notaris yang biasanya dimanfaatkan oleh para pihak dengan memalsukan bukti-bukti materiil, seperti identitas diri. Tidak dipungkiri bahwa ada pula notaris yang terlibat tindak pidana pada sebuah akta, seperti tindak pidana pemalsuan terhadap akta yang dibuatnya. Untuk akan diteliti lebih lanjut bagaimana pengaturan notaris dalam tindak pidana membantu menyuruh menempatkan keterangan palsu kedalam akta otentik berdasarkan perundang-undangan di Indonesia dan bagaimana pertanggungjawaban pidana notaris dalam tindak pidana membantu menyuruh menempatkan keterangan palsu kedalam akta otentik berdasarkan praktek peradilan di Indonesia. Metode penelitian yang digunakan dalam penelitian ini adalah metode penelitian hukum normatif. Dari hasil penelitian ditemukan Pengaturan Notaris Dalam Tindak Pidana Membantu Menyuruh Menempatkan Keterangan Palsu Kedalam Akta Otentik Berdasarkan Perundang-Undangan di Indonesia diatur dalam ketentuan Pasal 266 ayat (1) KUHP dan Pertanggungjawaban Pidana Notaris Dalam Tindak Pidana Membantu Menyuruh Menempatkan Keterangan Palsu Kedalam Akta Otentik Berdasarkan Praktek Peradilan di Indonesia dengan menjatuhkan pidana terhadap Terdakwa Charles dengan pidana penjara selama 1 (satu) tahun, karena terdakwa telah terbukti secara sah dan meyakinkan bersalah melakukan tindak pidana membantu Menyuruh Menempatkan Keterangan Palsu Kedalam Akta Otentik sebagaimana ketentuan Pasal 266 ayat (1) KUHP Jo Pasal 56 ayat (1) KUHP. Dari hasil penelitian untuk perbaikan dibuatkan pengaturan mengenai tindak pidana notaris yang membantu menyuruh menempatkan keterangan palsu kedalam akta otentik dibuatkan secara khusus dalam UU, Perundang-undangan, Peraturan Pemerintah, Permenkumham. Dan Majelis Hakim yang memutus perkara seharusnya memberikan saksi etika terhadap notaris selain memberikan sanksi pidana agar memberikan efek jera bagi notaris.

PELAKSANAAN AKAD MURABAHAH PADA PERBANKAN SYARIAH (STUDI BANK SYARIAH INDONESIA) DI KANTOR CABANG. HASANUDIN KEDIRI Ariyanto, Teguh; Nurbaedah, Nurbaedah
MIZAN, Jurnal Ilmu Hukum Vol 14 No 1 in press (2025): Mizan: Jurnal Ilmu Hukum
Publisher : Universitas Islam Kadiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32503/mizan.v14i1.6881

Akad Murabahah adalah akad jual beli, antara dua pihak dimana pihak pertama sebagai penjual (al-bai’) berkewajiban menjual barang yang dibutuhkan nasabah, sedangkan pihak kedua disebut pembeli (musytari) berkewajiban membayar barang yang akan dibeli. Dalam akad murabahah, pihak pertama atau penjual (al-bai’ memberitahukan kepada pembeli harga pokok ditambah dengan keuntungan yang disepakati. Pembiayaan Akad Murabahah dapat dilakukan secara tunai maupun angsuran. Dalam angsuran apabila nasabah terlambat membayar angsuran, maka bank syariah mengenakan denda (ta’zir) kepada nasabah. Akan tetapi dalam prakteknya, penulis menemukan pemberlakuan denda yang diperuntukkan kepada nasabah secara umum sehingga menyebabkan ketidak adilan, apabila memang nasabah tersebut tidak mampu bayar bank wajib memberi kelonggaran dan tidak mengenakan denda. Rumusan Masalah dalam penelitian ini adalah : 1) Bagaimana Pelaksanaan Akad Murabahah pada Perbankan Syariah di Bank Syariah (BSI) Kantor Cabang Hasanudin Kediri. 2) Apa Hambatan, Tantangan dan Peluang Akad Murabahah pada Perbankan Syariah di Bank Syariah (BSI) Kantor Cabang Hasanudin Kediri. Jenis Penelitian ini adalah penelitian yuridis normatif, dengan menggunakan metode pendekatan perundang-undangan dan peraturan terkait. Dalam penelitian ini menggunakan bahan hukum primer, bahan hukum sekunder dan bahan hukum tersier yang merupakan sumber utama. Metode analisis yang digunakan dalam penelitian ini adalah metode preskriptif dan deskriptif kualitatif. Hasil penelitian menunjukan dalam fiqh, denda (ta’zir) diperbolehkan bagi nasabah yang mampu, tetapi menunda-nunda pembayaran dan bagi nasabah yang tidak mampu tidak boleh dikenakan denda (ta’zir) serta diberi kelonggaran waktu membayar angsuran pokok. Penerapan denda (ta’zir) yang diterapkan bank syariah BSI termasuk riba nasiah/riba jahiliyyah. Sehingga pengalokasian denda (ta’zir) dimasukkan dalam pendapatan non halal bank syariah dan digunakan untuk kegiatan sosial. Denda di bank syariah BSI Kantor Cabang Hasaundin Kediri diberlakukan kepada nasabah yang terlambat membayar angsuran secara menyuluruh tanpa melihat nasabah tersebut mampu atau tidak mampu dalam membayar angsuran dalam pembiayaan murabahah. Menjadi tidak adil apabila nasabah yang tidak mampu juga dikenakan denda. Bank seharusnya mencari tahu penyebab nasabah tidak membayar angsuran sehingga dapat diterapkan secara adil.

Pemberdayaan Posyandu Lansia sebagai Sarana Skrining Sindrom Metabolik pada Lansia di Dusun Iroyudan, Kapanewon Pajangan, Bantul, DIY Ariyanto, Teguh; Mayang Rachma Aninstya; Budiarto, Arief
Jurnal Pengabdian, Riset, Kreativitas, Inovasi, dan Teknologi Tepat Guna Vol 1 No 2 (2023): November
Publisher : Direktorat Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/parikesit.v1i2.9616

One of the main diseases in the adult population in Indonesia is metabolic disorders. Metabolic syndrome is a group of several metabolic disorders such as central obesity, high blood pressure, glucose intolerance, and abnormal amounts of fat in the blood (dyslipidemia) which can potentially cause various degenerative diseases such as cardiovascular disease, stroke and type 2 diabetes mellitus. Metabolic syndrome in Indonesia still ranks the highest for the state financial burden with such high mortality and morbidity rates. One of the steps commonly used for initial diagnosis and screening for metabolic syndrome is through Community Health Centers (Puskesmas) and Integrated Health Service Posts (Posyandu). This applied research regarding the empowerment of elderly posyandu presents descriptive data regarding the prevalence of metabolic syndrome in Iroyudan District, provides an evaluation of various risk factors related to metabolic syndrome, especially in the elderly population of Iroyudan District, and provides interventions and impacts to increase the screening capacity at elderly posyandu in Iroyudan District. Based on the research results, demographic data was obtained for the elderly in Iroyudan District regarding several metabolic syndrome screening indicators, namely the abdominal circumference indicator (central obesity) with a total of 31.25% in the elderly population with details of elderly women at 45.4% (n=15) and 0 % in elderly men (n=0); total blood pressure (hypertension) indicators were 68.7% in the elderly population with the details of elderly women at 63.6% (n=21) and 80% among elderly men (n=12); and the blood sugar indicator when above 200 mg/dL was a total of 16.6% in the elderly population with the details of elderly women at 18.1% (n=6) and 13.33% among elderly men (n=2). The total prevalence of metabolic syndrome in the elderly population of Iroyudan District was 8.3% (n=4). Based on this research data and results, it is necessary to increase screening and early detection of metabolic syndrome, one of the strategies is by through empowering elderly posyandu by increasing the knowledge and skills of health cadres, ensuring the quantity and quality of health examination tools, as well as increasing the number of health cadres adjusted to the total population.

Removal of metronidazole from simulated wastewater using Fe/C catalyst with a combination of heterogenous Fenton and ozonation Panandita, Budi Satria; Prasetyo, Imam; Ariyanto, Teguh
Jurnal Rekayasa Proses Vol 17 No 2 (2023): Volume 17, Number 2, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.75633

This study examined roles of iron oxide/porous carbon material (Fe/C) for removing metronidazole in simulated wastewater by adsorption and then followed by a degradation using advanced oxidation process (H2O2, O3 and combination of H2O2/O3). Fe/C was produced by an impregnation of iron oxide precursors during resorcinol-formaldehyde synthesis followed by pyrolysis at 800 °C. For comparison, blank carbon (without iron loading) was also synthesized. The properties of porous carbon were investigated by SEM-EDX and N2-sorption analyzer. Blank carbon and Fe/C featured the specific surface area of 755 m2g-1 and 394 m2g-1, respectively. The loading of iron oxide altered the pore structures of material. The adsorption isotherm data were followed by the Langmuir isotherm model with metronidazole uptake up to 46.07 mg g-1 and 39.97 mg g-1 at 30oC by Fe/C and blank carbon. The degradation study was then carried out with catalyst dosage of 0.1 g/100 mL solution and 120 min reaction time at 30 oC. It is noticeably that, the degradation of metronidazole was better when a combination of H2O2/O3 was employed, compared with an individual of H2O2 or O3. Regarding the stability, Fe/C maintained its high activity upon four consecutive runs.

Potassium Permanganate Confined in Porous Carbon Pretreated Using Wet Ozone Oxidation for Hydrogen Sulfide Removal (H2S): Kalium Permanganat Terimpregnasi dalam Karbon Aktif Teraktivasi Oksidasi Ozon Basah untuk Penghilangan Hidrogen Sulfida (H2S) Suhirman; Ariyanto, Teguh; Prasetyo, Imam; Hardhianti, Meiga Putri Wahyu
Jurnal Teknologi Lingkungan Vol. 26 No. 2 (2025)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2025.11385

Abstrak Kontaminan gas merupakan masalah besar pada proses industri dan lingkungan, terutama hidrogen sulfida (H2S). Gas ini tidak berwarna, tidak berbau, korosif terhadap jaringan pipa gas alam, merusak katalis logam, dan menyebabkan hujan asam. Selain itu, gas ini sangat mudah terbakar dan sangat beracun, sehingga perlu dihilangkan meskipun dalam konsentrasi kecil. Salah satu metode untuk menghilangkan H2S, yang belum dipelajari secara luas, adalah oksidasi dengan kalium permanganat (KMnO4) yang diimpregnasikan pada karbon berpori atau dinamai nano-confinement KMnO4. Cangkang sawit (PKS) digunakan sebagai bahan baku karbon berpori, yang melimpah, terbarukan, dan murah. Proses produksi nano-confinement KMnO4 terdiri atas eberapa langkah. Langkah pertama adalah pirolisis cangkang sawit dalam tungku pada suhu 800°C, diikuti oleh aktivasi karbon uap. Ini menghasilkan karbon berpori cangkang sawit (CPKS). Tahap kedua adalah pembuatan karbon berpori dari cangkang sawit yang cenderung hidrofilik dengan cara oksidasi praperlakuan menggunakan ozonasi basah, yang selanjutnya dinamakan CKPS-Oz. Kalium permanganat yang teremban dalam karbon berpori dari cangkang sawit (KMnO4/CPKS-Oz) diproduksi dengan cara impregnasi secara basah variasi KMnO4 sebesar 5, 10, dan 20% wt. Hasil uji kinerja menunjukkan bahwa KMnO4/CPKS-Oz mampu menghilangkan H2S hingga 98% dan lebih efektif dibandingkan hanya menggunakan KMnO4 (67%). Penelitian ini menunjukkan bahwa kombinasi antara oksidasi ozon basah dan impregnasi KMnO₄ ke dalam karbon aktif dari tempurung kelapa sawit (CPKS) menghasilkan peningkatan kapasitas oksidasi gas H₂S secara signifikan. Metode ini merupakan pendekatan baru yang belum banyak dilaporkan dalam pemanfaatan CPKS untuk penghilangan gas H₂S Abstrak A gas contaminant is a big problem in the process industry and environment, especially hydrogen sulfide (H2S). It is colorless, odorless, corrosive to natural gas pipelines, damages metal catalysts, and causes acid rain. Moreover, it is extremely flammable and highly toxic, so it needs to be removed even in small concentrations. One method to remove H2S, which has yet to be studied widely, is oxidation by nano-confinement permanganate potassium (KMnO4) in a porous carbon support. Palm kernel shells (PKS) were used as a raw material of porous carbon, which is abundant, renewable, and cheap. The production process of nano-confinement KMnO4 consists of several steps. The first step is the pyrolysis of palm kernel shells in the furnace at 800°C, followed by steam activation of carbon. It produced palm kernel shells porous carbon (CPKS). The second step was to produce porous carbon of palm kernel shell that tends to be hydrophilic by pretreatment oxidation using wet ozone treatment, which was then named CKPS-Oz. Potassium permanganate confined in porous carbon from palm kernel shell (KMnO4/CPKS-Oz) was produced by incipient wet-impregnation with KMnO4 variations of 5, 10, and 20%wt. The performance test showed that KMnO4/CPKS-Oz could remove H2S up to 98% and was more effective than only using KMnO4 (67%). This work presents a novel synergistic strategy by integrating wet ozone oxidation and KMnO₄ confinement within palm kernel shell–derived porous carbon (CPKS), providing a sustainable and highly efficient material tailored explicitly for hydrogen sulfide (H₂S) removal from gas streams.

Kinetic study of bioactive compound extraction from cacao shell waste by conventional and deep eutectic solvent Irsal, Muh.; Kusumastuti, Yuni; Ariyanto, Teguh; Putri, Nur Rofiqoh Eviana
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1606

Cacao shells contain bioactive compounds such as phenolic acids and flavonoids. This study investigated the potential of bioactive compound extraction in cacao shells using conventional and green solvents like deep eutectic solvent (DES) (choline chloride: lactic acid). Specifically, it investigated the extraction kinetic models and parameters, which are critical to scale up the extraction process. The extraction of cacao shell was conducted using various conventional solvents (ethanol, methanol, n-hexane, and water) and DES (100 % and 70%) in which the result showed that DES 100% had the highest total phenolic content of 337.92?±?9.55 mg GAE/g dry weight. Meanwhile, pseudo-second order and Peleg’s model provided the best fit for the experimental data with higher R2 values. DES 70% showed a higher total flavonoid content of 76.51?±?1.59 mg RE/g dry weight. FT-IR and Raman spectroscopy confirmed the presence of bioactive compounds in DES-based extracts, which revealed characteristic vibrational bands associated with polyphenolic structures. These include bands corresponding to hydroxyl (–OH), carbonyl (C=O), and aromatic C=C stretching—functional groups commonly found in quercetin and other bioactive compounds.

Binary Composite of Chitosan-Derived Porous Carbon/PANI for High Capacitance Performance of Supercapacitors Gala, Kyla Amalia; Henra Gurning; Prasetyo, Imam; Ariyanto, Teguh
Jurnal Sains Materi Indonesia Vol. 27 No. 1 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.9207

The study of carbonaceous electrode materials for supercapacitors is expanding and remains challenging. Chitosan is one of the many biomasses found in nature that can be converted into porous carbon for electrode materials in supercapacitors. Despite having a high specific surface area and good chemical stability, porous carbons have a limitation of specific capacitance. On the other hand, polyaniline (PANI), a conductor polymer, typically exhibits high specific capacitance but has low stability. Thus, a binary nanocomposite of chitosan-derived porous carbon (CCS) and PANI is suggested to obtain an optimal performance. Porous carbon was produced from chitosan through two steps: (i) hydrothermal carbonization; (ii) chemical activation using steam at a temperature of 800 °C for 2 hours. The CCS was then oxidized with diluted H2O2 to increase surface wettability. Binary nanocomposites were produced by a nanocompositing method of in situ polymerization of PANI with a variation of 5% (CCS/PANI5%), 10% (CCS/PANI10%), and 15% (CCS/PANI15%). The materials were characterized by scanning electron microscopy–energy dispersive X-ray (SEM-EDX), Fourier-transform infrared (FTIR), N2-sorption analysis, and thermogravimetric analysis (TGA). Meanwhile, electrochemical tests were performed using a three-electrode method to obtain cyclic voltammetry and the capacitance of each sample. The N2-sorption analysis showed that the surface area of samples CCS, CCS/PANI5%, CCS/PANI10%, and CCS/PANI15% are 1305 m2.g-1, 430 m2.g-1, 333 m2.g-1, and 238 m2.g-1, respectively. SEM-EDX, FTIR, and TGA proved that PANI is loaded in the carbon surface. From the electrochemical tests conducted at a scan rate of 5 mV.s⁻¹, the specific capacitance values for the samples CCS, PANI, CCS/PANI5%, CCS/PANI10%, and CCS/PANI15% were determined to be 220.27 F.g⁻¹, 143.81 F.g⁻¹, 330.42 F.g⁻¹, 434.73 F.g⁻¹, and 391.27 F.g⁻¹, respectively. The CCS/PANI10% sample exhibited the highest specific capacitance of 434.73 F.g⁻¹, corresponding to an energy density of 86.9 Wh.kg⁻¹ and a power density of 1.3 kW.kg⁻¹. These significant enhancements in specific capacitance underscore the effectiveness of the nanocomposite approach and highlight its potential for improving electrode performance. As a result, the chitosan-based porous carbon and polyaniline nanocomposite developed in this study is a promising candidate for supercapacitor electrode materials.

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