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All Journal Jurnal Ilmiah Universitas Batanghari Jambi ALCHEMY Jurnal Penelitian Kimia Eksakta : Berkala Ilmiah Bidang MIPA International Journal of Research in Vocational Studies (IJRVOCAS) Gunung Djati Conference Series Journal of Biobased Chemicals (JOBC)
Silvia Devi Eka Putri
Akademi Kimia Analis Caraka Nusantara, Depok
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The Adsorption of Mercury from Aqueous Solution on Durian (Durio zibethinus) Seed Immobilized Alginate Intan Lestari; Silfia Devi Eka Putri Putri; Martina Asti Rahayu; Diah Riski Gusti
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 23 No. 01 (2022): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (908.974 KB) | DOI: 10.24036/eksakta/vol23-iss01/305

Abstract

The increasing pollution of toxic heavy metals in the environment is an important issue worldwide. Heavy metal ions such as mercury have attracted special attention because of their high toxicity and long half-life which increase the potential to accumulate in the food chain and cause serious damage to the environment. The potential of an adsorbent durian (Durio zibethinus) seed immobilized alginate bead was carried out and used for the adsorption of Mercury in an aqueous solution. Adsorbents were characterized by FTIR, SEM, and XRF. FTIR analysis shows the functional groups of alcohol, amine, and carboxylic acid. Scanning Electron Microscopy shows that the surface morphology of durian seed powder of granules and durian seed immobilized in Ca-alginate of like as tissue eggs in an egg box shape. XRF analysis durian seed immobilized showed that Hg(II) ion adsorbed as much as 37%. The adsorption parameter of Hg(II) ion are pH at 6 with an adsorption capacity was 1.553 mg/g, contact time at 150 minutes with adsorption capacity was 2.880 mg/g, mass 0.1 g with adsorption capacity of 2.274 mg/g, and concentration 250 mg/g with adsorption capacity of 62.067 mg/g.
Facile Synthesis of Composite Chitosan and Durio zibethinus Seed and Its Applications as Adsorbent of Metal Ion Ni(II) Silvia Devi Eka Putri; Sri Mulijani; Komar Sutriah
ALCHEMY Jurnal Penelitian Kimia Vol 19, No 2 (2023): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.19.2.65948.197-209

Abstract

Nickel is one of the most dangerous heavy metals that impact water ecosystems and human health. In the study, natural and harmless composite materials such as biochar and chitosan were modified to build adsorbent composites and form optimal conditions for the adsorption of nickel heavy metal ions from contaminated wastewater. Biochar was prepared from Durio zibethinus seeds by hydrothermal method to form nanopowder. It was treated with acid, while chitosan was designed as nanopowder by hydrothermal method, also without acid treatment. Composite adsorbents were prepared by mixing biochar and chitosan with a ratio of 4:3 (w/w). Fourier Transform Infrared characterizes composite materials as adsorbents, biochar, and chitosan. The surface morphology of the adsorbent was evaluated by scanning electron microscopy. Furthermore, Langmuir, Freundlich, and Temkin isotherms determine the adsorbent's performance. In addition, batch adsorption experiments were carried out to measure the effect of solution pH, adsorbent dosage, and initial concentration of metal ions. Nickel ion adsorption by the composite adsorbent showed an adsorption capacity of 26.69 mg/g, a maximum removal efficiency of 89.39% at optimum conditions of pH 6, an adsorbent dose of 0.5 g, and a contact time of 200 minutes. This adsorption capacity was better than chitosan and durian seed adsorbents. The nickel ion adsorption process by composite adsorbent shows a pattern in the Temkin isotherm model. In contrast, the chitosan and Durio zibethinus seed adsorbents tended to follow the Langmuir and Freundlich isotherm models. In addition, the adsorption kinetics of the composite material showed pseudo-second-order kinetics, and the reaction was exothermic.
Pemanfaatan Limbah Cair Tahu Sebagai Alternatif Produksi Pupuk Cair Dengan Teknik Fermentasi Anaerob Saskia Eka Dian; Rasya Septinania Az Zahra; Agus Taufiq; Mutiara Dewi Rukmana; Silvia Devi Eka Putri
Gunung Djati Conference Series Vol. 44 (2024): Seminar Nasional (SEMNAS) Kimia Tahun 2024
Publisher : UIN Sunan Gunung Djati Bandung

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Abstract

Proses pembuatan tahu menghasilkan limbah dalam jumlah yang signifikan, terutama limbah cair. Limbah cair tahu ini terurai dengan cepat dan memiliki kandungan protein yang tinggi. Cairan ini dapat mencemari lingkungan jika dibuang ke lingkungan tanpa terlebih dahulu diolah. Limbah cair tahu juga mempunyai kandungan unsur hara yang tinggi, dengan melihat potensi dari kandungan tersebut maka dilakukan pengolahan limbah cair tahu dengan memanfaatkannya sebagai bahan baku pupuk organik cair (POC) secara fermentasi anaerob. Dengan memanfaatkan limbah cair tahu sebagai pupuk organik cair, terdapat beberapa keuntungan yang diperoleh. Pertama, mengurangi kemungkinan polusi yang disebabkan oleh pembuangan limbah cair tahu secara langsung ke lingkungan. Kedua, mendukung gagasan keberlanjutan dengan memanfaatkan sampah sebagai sumber daya yang berharga. Terakhir, hal ini menciptakan nilai ekonomi bagi industri tahu dan komunitas di sekitarnya. Dengan menambahkan EM4, air kelapa, larutan gula, dan air secukupnya, semua bahan tersebut dicampur dan dilakukan proses fermentasi secara anaerob selama 14 hari. Setelah proses fermentasi, pengukuran dilakukan dari karakteristik fisikokimia pupuk organik cair yang dihasilkan. Hasil pengukuran diperoleh pupuk organik cair berwarna coklat kekuningan dengan terdapat buih dan jamur, bau fermentik serta Total Dissolved Solids (TDS) sebesar 1,82 ppt, kadar garam sebesar 1,87 ppt, konduktivitas listrik sebesar 3,68 mS dan pH sebesar 4. Hasil ini menunjukkan bahwa pupuk organik cair dari limbah cair tahu memiliki potensi untuk digunakan sebagai pupuk alternatif yang ramah lingkungan.
Peningkatan Kualitas Air Limbah Tahu dengan Penggunaan Arang Aktif dan Zeolit Alam dalam Sistem Filtrasi Mahdanisa Aulia; Muhammad Dzaky Arifin; Agus Taufiq; Mutiara Dewi Rukmana; Silvia Devi Eka Putri
Gunung Djati Conference Series Vol. 44 (2024): Seminar Nasional (SEMNAS) Kimia Tahun 2024
Publisher : UIN Sunan Gunung Djati Bandung

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Abstract

Tahu adalah makanan yang sangat populer di Indonesia karena harga yang terjangkau dan kandungan gizi yang tinggi. Namun, dalam memproduksi tahu menghasilkan limbah padat dan cair. Limbah cair tahu mengandung karbohidrat, protein, dan lemak yang dapat terurai oleh bakteri, menyebabkan penurunan oksigen terlarut dan kondisi anaerobik yang merusak kualitas air. Limbah cair tahu yang dibuang langsung ke badan air tanpa pengolahan dapat menghasilkan senyawa asam yang menurunkan pH air, mengurangi penetrasi cahaya matahari, dan menghambat fotosintesis tanaman air, sehingga mengurangi oksigen dalam air. Salah satu metode untuk mengolah limbah tahu agar dapat dibuang dengan aman adalah metode filtrasi. Penelitian ini bertujuan untuk meningkatkan kualitas air limbah tahu menggunakan metode filtrasi dengan media berupa arang aktif dan zeolit. Penelitian ini dilakukan dengan menggunakan media berupa arang aktif, zeolit, bioball, dan bioring selama tujuh hari, dengan pengukuran pH pada hari ke-1, ke-3, ke-5, dan ke-7. Hasil menunjukkan bahwa pada hari pertama, pH limbah cair tahu meningkat dari 4 menjadi 8, dan stabil pada pH 7 pada hari-hari berikutnya. Ini menunjukkan efektivitas arang aktif dan zeolit dalam menetralkan keasaman melalui penyerapan dan pertukaran ion, sementara bioball dan bioring menyediakan permukaan bagi mikroorganisme yang membantu menguraikan bahan organik dan menjaga keseimbangan pH. Sistem filtrasi yang menggabungkan arang aktif, zeolit, bioball, dan bioring terbukti efektif dalam meningkatkan kualitas air limbah tahu. Metode ini menawarkan solusi yang ramah lingkungan untuk mengurangi dampak pencemaran limbah cair dan mendukung keberlanjutan ekosistem akuatik. Implementasi sistem filtrasi ini berpotensi memberikan kontribusi positif terhadap perlindungan lingkungan serta pemeliharaan kualitas air.
Variasi Waktu Pengadukan dan Rasio Poly Aluminium Chloride (PAC) Terhadap Pengolahan Limbah Cair Industri Tahu Cahyo, Ari Dwi; Riyanto, Andi; Rukmana, Mutiara Dewi; Putri, Silvia Devi Eka; Adriansyah, Endi; Suzana, Asih; Sufra, Rifqi
Jurnal Ilmiah Universitas Batanghari Jambi Vol 25, No 1 (2025): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v25i1.6002

Abstract

Liquid waste from the tofu industry contains various organic and inorganic substances which can reduce water quality. This research aims to assess the effectiveness of Poly Aluminum Chloride (PAC) as a coagulant in reducing pollution parameters in liquid waste from the tofu industry. In this study, experiments were carried out with three variations of PAC doses (75 mg/L, 150 mg/L, and 225 mg/L) and different stirring times (10, 15, and 20 minutes) using the jar test method. The jar test method is a standard laboratory technique used to determine the optimal dose of coagulant needed to remove turbidity from wastewater. The results show that a PAC dose of 225 mg/L with a stirring time of 20 minutes is the optimal condition, reducing Total Dissolved Solids (TDS) from 996 ppm to significantly lower. The initial conductivity of 1971 µs decreased after the addition of high doses of PAC and longer stirring times. The pH parameter increased from 4 to 5. Although still acidic, this increase indicates a reduction in acidity, which can be useful in reducing negative impacts on the aquatic environment. The color of the wastewater becomes clearer and the odor decreases, indicating a decrease in organic compounds and dissolved substances. The temperature remained stable at 28ºC before and after treatment. This research confirms that PAC is effective in improving the quality of wastewater from the tofu industry through the coagulation mechanism, producing cleaner and clearer water with a significant reduction.
Environmental Quality Monitoring of Road Preservation in the Paal X Area Adriansyah, Endi; Nalendra, Brama; Radinal; Qolbi, M. Khofidul; Syahfutra, Juanda Edo; Sufra, Rifqi; Syaiful, M.; Putri, Silvia Devi Eka; Dony, Wari
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 1 (2025): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i1.388

Abstract

Transportation plays a very important role in economic development in Indonesia. The contribution of construction services to national development is very large, especially in preparing road facilities and infrastructure which have a great influence on economic development in Indonesia. In order to integrate the transportation system in Indonesia, this indicates the increasing number of road maintenance project activities. Jambi Province has a national road where road maintenance activities are carried out every year. The increasing number of road maintenance activities means that based on existing regulations, it is important to carry out environmental testing during the construction period. The purpose of this study is to carry out environmental testing on the Preservation work of the X road section which includes surface water analysis, ambient air testing, n. The method used in this study is descriptive quantitative, the quality standards in this test include Government Regulation No. 22 of 2021. The results of this study at the location obtained all test results with the nationally accredited laboratory KAN are still below the environmental quality standard parameters.
Evaluasi Efektivitas Kolom Biofilter dengan Media Campuran untuk Pengolahan Limbah Cair Tahu Eka, Silvia Devi Eka Putri; Mutiara Dewi Rukmana; Istiqomah Rahmawati; Tazkia Maulida Putri; Zahwa Annaya
Journal of Biobased Chemicals Vol. 5 No. 1 (2025): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v5i1.5595

Abstract

Indonesia's increasing number of tofu industries has led to a rise in waste volume from this sector, requiring exceptional management. Tofu wastewater, a byproduct of tofu production that is no longer utilized, contains a high concentration of organic matter and can adversely affect water supplies if discharged untreated. This study aims to investigate an efficient filtration technique using filtration media for processing tofu wastewater. The biofilter column used in this study was made from a Le Minerale gallon and comprised layers of zeolite, bio balls, bearings, and activated charcoal to filter and purify the water from organic substances. The results showed that while filtration effectively reduced Total Dissolved Solids (TDS) from 995 ppm to 129 ppm after the fourth filtration, it was ineffective in neutralizing the pH of the tofu wastewater, which remained at pH 4 before and after filtration. This indicates that the wastewater remains acidic and cannot be directly discharged into the environment. Additionally, conductivity and salt levels increased after multiple filtrations, possibly due to ion release from the filter materials or saturation effects. This study reveals that the column configuration and filtration materials used were ineffective in removing acidic components from tofu wastewater. Therefore, design adjustments and filtration media selection are needed to achieve better results in treating tofu wastewater.
Co-Authors Agus Taufiq Andi Riyanto Brama Nalendra Cahyo, Ari Dwi Diah Riski Gusti Endi Adriansyah Intan Lestari Istiqomah Rahmawati Komar Sutriah M. Syaiful Mahdanisa Aulia Martina Asti Rahayu Muhammad Dzaky Arifin Mutiara Dewi Rukmana Mutiara Dewi Rukmana Mutiara Dewi Rukmana, Mutiara Dewi Qolbi, M. Khofidul Radinal Rasya Septinania Az Zahra Saskia Eka Dian Sri Mulijani Sufra, Rifqi Suzana, Asih Syahfutra, Juanda Edo Tazkia Maulida Putri Wari Dony Zahwa Annaya