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Journal : JURNAL REKAYASA KIMIA

Adsorption of Mercury (II) Ions from Water Using Carbon-Based Monolith with Manganese Oxide Filler Kusuma, Debby Widya; Mahidin, Mahidin; darmadi, darmadi
Jurnal Rekayasa Kimia & Lingkungan Vol 17, No 2 (2022): Jurnal Rekayasa Kimia & Lingkungan (December, 2022)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v17i2.27747

Abstract

Mercury is harmful to humans and the ecological environment. The adsorption process is known as an effective method for removing heavy metals. This research is devoted to developing new adsorbents based on carbon materials to remove metal ions Hg(II) with carbon-based monolith adsorbents without and with manganese oxide fillers (KM and KMM). The results of adsorption efficiency, adsorption kinetics, and isotherm models were made in a batch system with varying concentrations of mercury solution from 2 mg/L to 6 mg/L with adsorbents without and with manganese oxide fillers (KM and KMM). The highest removal efficiency reached 96% on KMM and 47% on KM. The adsorption isotherm of Hg(II) ions corresponds to the Freundlich model, with intensity and volume constants obtained respectively 0.042 and 1.347 L/mg on KM adsorbents, while on KMM adsorbents the intensity and volume constants obtained are 0.291 and 2.079, respectively. L/mg. These results indicate that physical adsorption occurs more dominantly than chemical adsorption. The adsorption of Hg(II) ions was in accordance with the pseudo-first-order adsorption kinetics, with the adsorption capacity and rate constant on the KM adsorbent obtained were 0.0505 mg/g and 0.0072 g/mg, while the adsorption capacity and rate constant for the KMM adsorbent were on KM adsorbents obtained were 0.0848 mg/g and 0.0239 g/mg.
Transesterifikasi Minyak Biji Buta-Buta menjadi Biodiesel pada Katalis Heterogen Kalsium Oksida (CaO) Zaki, Muhammad; Husin, M.T., Husni; Alam, Pocut Nurul; Darmadi, Darmadi; Rosnelly, Cut Meurah; Nurhazanah, Nurhazanah
Jurnal Rekayasa Kimia & Lingkungan Vol 14, No 1 (2019): Jurnal Rekayasa Kimia & Lingkungan (June, 2019)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v14i1.13495

Abstract

Penelitian ini menggunakan katalis padat CaO untuk reaksi transesterifikasi minyak biji buta-buta menjadi biodiesel. Minyak biji buta-buta diekstraksi menggunakan alat press. Katalis CaO disiapkan dari cangkang kerang dengan cara dipijar pada suhu 850 oC. Sampel katalis dikarakterisasi dengan metode scanning electron microscopy (SEM) dan x-ray diffractometer (XRD). Katalis cangkang kerang memiliki ukuran partikel antara 200-2000 nm. Hal ini karena pemanasan cangkang pada 850 oC menyebabkan terjadi aglomerasi. Dari rekaman XRD teridentifikasi bahwa katalis didominasi oleh senyawa CaO dan terdapat sedikit CaCO3. Reaksi transesterifikasi dilangsungkan dalam reaktor batch dengan variasi suhu (55 oC, 60 oC, 65oC, dan 70oC), rasio metanol terhadap minyak: 3:1, 6:1, 9:1, 12:1, dan 15:1. Reaksi dilangsungkan selama 3 jam dan katalis didispersi 6 % berat dari minyak. Perolehan metil ester maksimum dicapai 96,7% pada kondisi reaksi, yaitu: molar metanol:minyak 12:1 dan suhu reaksi 65 oC. Karakteristik biodiesel hasil penelitian ini memenuhi sifat-sifat bahan bakar berkualitas tinggi sesuai dengan standar SNI dan ASTM. Proses transesterifikasi minyak biji buta-buta dan metanol menggunakan CaO sebagai katalis basa heterogen layak diaplikasikan secara komersial untuk produksi biodiesel dalam skala industri.
Aplikasi Metode Advance Oxidation Process (AOP) Fenton pada Pengolahan Limbah Cair Pabrik Kelapa Sawit Yulia, Ruka; Meilina, Hesti; Adisalamun, Adisalamun; Darmadi, Darmadi
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 1 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v11i1.4098

Abstract

Penelitian ini bertujuan untuk mengetahui kemampuan proses Fenton dalam menurunkan kadar chemical oxygen demand (COD) dan kadar total suspended solid (TSS) dari limbah cair pabrik kelapa sawit (PKS) dan menentukan kondisi optimum dari parameter yang digunakan dengan Response Surface Methodology menurut Box- Behnken design. Sampel diambil pada keluaran pertama kolam anaerobik ketiga dari instalasi pengolahan limbah cair kelapa sawit yang mengandung nilai COD berkisar antara 8.000 hingga 12.000 ppm. Pada penelitian ini, dilakukan pengujian pada berbagai pH, konsentrasi FeSO4.7H2O dan konsentrasi hidrogen peroksida. Hasil penelitian menunjukkan bahwa kemampuan proses AOP dengan metode Fenton dapat menurunkan konsentrasi COD dan TSS masing-masing adalah 70,7704% dan 88,3897% pada konsentrasi FeSO4.7H2O 3703,52 ppm, konsentrasi H2O2 5586,43 ppm, dan pH 3.
Pengolahan Limbah Cair Pabrik Pupuk Urea Menggunakan Advanced Oxidation Processes Darmadi, Darmadi
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 1 (2014): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v10i1.2166

Abstract

Limbah cair pabrik pupuk urea terdiri dari urea dan amonium yang masing-masing mempunyai konsentrasi berkisar antara 1500-10000 ppm dan 400-3000 ppm. Konsentrasi urea yang tinggi di dalam badan air dapat menyebabkan blooming algae dalam ekosistem tersebut yang dapat mengakibatkan kehidupan biota air lain terserang penyakit. Peristiwa ini terjadi karena kurangnya nutrisi bagi biota air dan sedikitnya sinar matahari yang dapat menembusi permukaan air. Disamping kedua hal tersebut di atas, algae juga dapat memproduksi senyawa beracun bagi biota air dan manusia. Penelitian ini bertujuan untuk mengolah urea menggunakan oksidasi konvensional (H2O2) dan Advanced Oxidation Processes (kombinasi H2O2-Fe2+) pada pH 5 dengan parameter yang digunakan adalah variasi konsen-trasi awal H2O2 dan konsentrasi Fe2+. Hasil percobaan menunjukkan bahwa penurunan konsentrasi urea tertinggi diperoleh pada penggunaan reagen fenton (8000 ppm H2O2 dan 500 ppm Fe2+), yaitu dapat menurunkan urea dari konsentrasi awal urea 2566,145 ppm menjadi 0 ppm. Kinetika reaksi dekomposisi urea menjadi amonium dan amonium menjadi nitrit dan nitrat yang diuji mengikuti laju kinetika reaksi orde 1 (satu) terhadap urea dan orde satu terhadap amonium dengan konstanta laju reaksi masing-masing k1 = 0,019 dan k2 = 0,022 min-1.
Linear Driving Force Model for Adsorption onto Activated Carbon Monolith Darmadi, Darmadi; Choong, Thomas S.Y.; Chuah, T. G.; Yunus, Robiah; Yap, Taufiq Y.H.
Jurnal Rekayasa Kimia & Lingkungan Vol 5, No 1 (2006): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A mathematical model on carbon coated monolith using the linear driving force model is develop. The computer program is writted in MATLAB and simulation using data from [4] for cell density 200 cpsi was used to studies the effect of different variables on breakthrough profiles. The result showed that the breakthrough curve of the monolith is very sharp. Because of its an open structure and lower pressure drop, monolith is an attractive alternative internals for separation.Keywords: Adsorption, modeling, simulation, carbon coated monolith, breakthrough
Pengolahan Limbah Cair Laundry Menggunakan Membran Selulosa Diasetat Berbasis Selulosa Pulp Kayu Sengon (Paraserianthes falcataria) Setiawan, Vera Roni; Rosnelly, Cut Meurah; Darmadi, Darmadi
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 3 (2013): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v9i3.782

Abstract

The improvement of laundry activity brought a negative effect on the environment because laundry wastewater have a high content pollutants such as phosphate, surfactants, mineral, nitrogen, COD and other components, so the treatment is needed before being discharged into terristorial water. Laundry wastewater treatment has been conducted by membrane technology. Preparation of cellulose diacetate membranes with ultrafiltration process had be done by phase inversion using dimethylformamide (DMF) as a solvent. The filtration experiment showed that the highest membrane flux was 77,408 L/m2.h at TMP 3 bar. While the lowest flux at TMP 1 bar was 55.649 L/m2.h. Rejection of membrane ultrafiltration for parameters of COD, phosphate, and surfactant were 67%, 72%, and 63% respectively.Keywords: cellulose diacetate membranes, laundry wastewater, flux, rejection
Adsorption of Anion Dye from Aqueous Solution by Activated Carbon Coated Monolith in a Batch System Darmadi, Darmadi; Thaib, Anwar
Jurnal Rekayasa Kimia & Lingkungan Vol 7, No 4 (2010): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

The adsorption of an anion dye, methyl orange, from aqueous solutions on polymer based carbon coated monolith was studied in a batch system. The kinetics of adsorption with respect to the initial dye concentration was investigated. Langmuir and Freundlich isotherms were applied to describe the experimental data. Equilibrium data fitted well to the Freundlich model for concentration range (0 160 mg/L). The maximum adsorption capacity of the carbon with BET surface area of 431 m2/g obtained from the Freundlich model was 36.72 (mg/g) (L/mg)1/n. The pseudo-first-order and pseudo-second-order kinetic models were employed to describe the kinetic data. The experimental data fitted well to the pseudo-second-order kinetic model with constant rates 5.42x10-4 and 2.22x10-4 g/(min-mg) for initial concentrations 50 and 100 mg/L, respectively. Keywords: adsorption, anion dye, carbon coated monolith
Co-Authors Abdul Aziz Adisalamun Adisalamun Agus Suhartono Agustin, Adinda Eka Ahyani, Ahyani Alhuda Amelia, Resty Ayu Andriani, Laura Ikhsa Anwar Thaib Ariska, Maiata Devi Aryuningtias, Inda Rizky Asiska Permata Dewi Asmara, Josi Farda Khafid Audia, Clara Ayu, Giovanni Ayuningtias, Ratih Balqist, Tanaya Barus, Rona Ganta Budiono Budiono Budiyono Budiyono Choirunnisa, Nastiti Cut Meurah Rosnelly Dahnilsyah, Dahnilsyah Daliani, Putri Destiana, Ristian Diva Dewi Permata Sari dharma Lindarto, dharma Dhoti, Shofi Ma'rifaturriya Dianti, Putri Rahma Dipuja, Diah Anugrah Divi Handoko Diyah, Anggraeni Djati, Sri Sasmita Djati, Sri Sasmito Donalizarti, Donalizarti Dorti Faot Dwi Rohman Soleh, Dwi Rohman Eliyani, Fitri Endarwati, Tri Erida, Zulfa Ermina Sari Ernidawati, Ernidawati Evi Suryawati Fadhilla, Febriana Nor Fadila, Sarah Faisal Haitomi Faizin, T. Faizin Fani, Syahmila Nanda Farhani, Lailatul Farid Farid, Farid Fathan, Muhammad Fashanul Fatihah, Salsabilla Rima Fatimah, Dafina Febiana, Maissy Feriandi, Yoga Ardian Fitra Suzanti Fitri, Ailsa Fitriana, Elza Fitriana, Nimas Nur Fitriyadi, Enjah Pipit Fitriyani, Novi Yanti Duwi Gaho, Daratul Aini Giovanni, Giovanni Gontar Alamsyah Siregar Gunarda, Gunarda Guruh, Muhamad Halomoan, Yan Kristian Hariyanti, Mariya Keke Hasan, Dedy Haryadi Hasbullah Hasbullah Herlina, Sara Hery Widijanto Hesti Meilina Husni Husin I Gusti Bagus Wiksuana Iballa, Brilian Dini MA Idris Idris Imelda Rey Imma Widyawati Agustin Indah, Erika Irda Sayuti IRWANTO Isa, M ismaningsih, ismaningsih Jelita, Aulia Vinda Junaidi, M. Junizar, Herdya Juwita, Sellia Kamaludin, Insan Kamaruzzaman, Suraiya Kustini, Endang Kusuma, Debby Widya Kusuma, Rinda Tri Lenny Prastiyowati, Lenny Leonardo Basa Dairi Lestari, Aulia Liantoro, Liantoro M, Iqhramullah M, Irfan Mahidin Mahidin Mariani Natalina Mariani Natalina L, Mariani Masrul Lubis Mawaddah , Nurul Medyan Riza Mirna Rahmah Lubis Mitri Irianti Moch. Rifai Muhammad Hatta Muhammad Rifai Muhammad Zainul Arifin Muhammad Zaki Mujahidah, Lathifah Mujiastutik, Dhea Putri Murtafi’ah, Wasilatul Muslim*, Abrar Musriyani, Iin Muzasti, Riri A. Nabil Nabil, Nabil Nadia Rahmadhani Naila Fauza Nartini, Nartini Natalia, Dilla Natalina. L, Mariani Nur Aysah, Ervinda Ika Nur, Doni Haidar Nurhazanah, Nurhazanah Nursal Nursal, Nursal Pamungkas, Dimas Tri Patmawati, Ike Permata Dewi, Asiska Pertiwi, Hernin Diah Permata Pocut Nurul Alam Prasetyo, Yohannes Eko Pratama, Aidilla Putri Nanda Pratama, Guruh Dwi Pratikso Pratikso Priyandani, Marisa Ayu Priyatna, Priyatna Pujiastutik, Novi Purba, Ernova Viorely Purbayani, Dina Rizky Purwaningsih, Riani Putri Dwi Sundari Putri, Aldila Rahma Putri, Ava Emalia Selviana Putri, Karisma Anisa Rachmat, Mudiyono Rahayu, Khatrina Rintis Lintang Rahmad Setiawan Rahmat, Mudiyono Rahmawati, Alfina Pristya Rasulyanti, Amalia Ratih Setiawati RIFAI, MOH. Riska Habriel Ruslie Rivalino, Ricky Robiah Yunus Rodi Wahyudi Rofi, Latifa Hammimatu Rosyida, Dina Safera, Della Dwi Safitri, Tania Saiful Saiful Saniya, Saniya Sanusi Sanusi Sardulo Gembong, Sardulo Sari Wulandari Satiti, Ihsani Hanif Setyo Septiyaningrum, Fina Dwi Putri Serly, Widya Ambar Setiawan Setiawan Setiawan, Johan Shufyani, Fahma Siti Juariah Siti Qomariah, Siti Siti Sarah, Siti Solihin, Dede Solikah, Nurul Islami Sri Adi Widodo Sri Wulandari Suadi Zainal sukri Sukri, sukri Suryani, N Lilis Suryaningputri, Dwi Amartani Susanti, Nurdieni Susanto, Noto Sutoro, Moh. Suwanto Suwanto Suwondo Suwondo Swasti Maharani, Swasti Syachrofi, Muhammad Syaflita, Dina Syahira, Juniva Syatoto, Iman Syavela, Gea T. G. Chuah T. M. Diansyah Tandana, Ester Taufiq Y.H. Yap Thomas S.Y. Choong Triasroza, Alrohma Nikmawati Turrahmah, Laila Tyas, Nazwa Julia Madyaning Utami, Dhiba Putri Setyari Vera Roni Setiawan Vindi, Yessika Wahyu, Eka Wahyuni, Liya Tri Wan Syafii Wardani, Yulia Nindi Wasilatul Murtafiah Weni Puji Hastuti Wibisono, Putri Sindy Wiwi Sartika Wulandini, Putri Yose Rizal Yulia Yesti, Yulia Yulia, Ruka Yulianti, Lia Mustika Novita Yusmadi, Y Yusrita, Eli Yustina Yustina Zafrida , Siska Zamzam, Zamzam Zulfah Zulfah Zulfarina, Zulfarina