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All Journal JURNAL INTEGRASI PROSES Nusantara Science and Technology Proceedings Equilibrium Journal of Chemical Engineering
Retno Dewati
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Pembangunan Nasional (UPN) “Veteran” Jawa Timur, Gunung Anyar 60294 Surabaya, Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Energy Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Other

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Reducing Zinc and Chromium in Wastewater Treatment Biosolid Through Sulfuric Acid Extraction Mu’tassim Billah; Disty Nur Rohmah; Faisal Amri Sholahuddin; Renova Panjaitan; Kindriari Nurma Wahyusi; Retno Dewati
Nusantara Science and Technology Proceedings 3rd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2022.2755

Abstract

The separation of heavy metals, zinc (Zn) and chromium (Cr), in biosolid waste can be carried out by an extraction process using H2SO4 as a solvent. The extraction process was carried out with a variation of time agitation and sulfuric acid concentration. The extracted cake was then analyzed using the atomic absorption spectrophotometry (AAS) method. The most effective reduction in Zn and Cr levels was obtained at 120 minutes and a solvent concentration of 1.5M with an efficiency of 98.80% and 97.89%, respectively.
SINTESIS KARBON AKTIF DARI SHORT FLAMING COAL LOKAL INDONESIA DENGAN AKTIVATOR KOH SEBAGAI ADSORBEN Yonathan Juanto; Izam Arrazhi; Retno Dewati; Sani Sani
JURNAL INTEGRASI PROSES Vol 13, No 2 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i2.26997

Abstract

Batu bara merupakan batuan organik yang terbentuk dari fosil tumbuhan yang berwarna gelap dan terasosiasi oleh kandungan mineral seperti abu dan belerang. Ada 3 tingkatan yang terdapat dalam batu bara antara lain lignit, bituminus, dan antrasit. Antrasit merupakan jenis batu bara terbaik dikarenakan memiliki kandungan karbon terbesar diantara ketiganya, untuk itu pada penelitian ini digunakan batu bara jenis Antrasit. Kandungan karbon yang terdapat pada batu bara dapat dimanfaatkan untuk menjadi karbon aktif yang berfungsi sebagai adsorben. Metode yang digunakan yaitu gabungan antara metode fisika dan kimia, dimulai dengan proses dehidrasi, karbonisasi, dan aktivasi. Hasil yang didapatkan ialah rasio penggunaan KOH dan suhu optimum terbaik untuk mengaktivasi batu bara antrasit ada pada perbandingan batu bara terhadap KOH 1:5 pada suhu 700°C dengan kadar air sebesar 9,9%, kadar abu sebesar 9,9%, kadar zat terbang sebesar 13%, kadar karbon terikat sebesar 77,1%, serapan iodin sebesar 1040,58 mg/g, dan luas permukaan sebesar 317,328 m2/g.
Effectiveness of Activated Carbon from Jackfruit Skin for The Heavy Metal Lead (Pb) Adsorption Using The Langmuir and Freundlich Equations Nadya Ramadhani Arke; Dewa Ayu Made Dearwita Sari; Retno Dewati
Equilibrium Journal of Chemical Engineering Vol 8, No 1 (2024): Volume 8, No 1 July 2024
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v8i1.86765

Abstract

Activated carbon is a commonly used medium for adsorption to combat environmental pollution in both water and air. It is produced from plant or plantation waste containing carbon. Jackfruit skin, often considered as plantation waste, contains lignocellulosic compounds and has the potential to be used as active carbon. Activated carbon from jackfruit skin has a good absorption capacity and can absorb heavy metal waste such as lead (Pb). A recent study aimed to evaluate the absorption effectiveness of active carbon from jackfruit skin. The process involved making activated carbon using the pyrolysis method, and then analyzing its lead absorption capacity in lead nitrate solution by varying the weight of the activated carbon (10g, 15g, 20g, 25g, 30g) and the adsorption time in minutes (40, 60, 80, 100, 120). The levels of absorbed lead on activated carbon were tested using Atomic Absorption Spectrophotometry (AAS) at a wavelength of 283.3 nm. The research findings indicate that the effectiveness of activated carbon absorption reaches 99%, and the appropriate equation model for the adsorption process is the Freundlich isotherm, indicating a multilayer adsorption process.Keywords:Adsorption Isotherm, Activated Carbon Jackfruit Skin, Lead (Pb)
Co-Authors Dewa Ayu Made Dearwita Sari Disty Nur Rohmah Faisal Amri Sholahuddin Izam Arrazhi Kindriari Nurma Wahyusi Mu’tassim Billah Nadya Ramadhani Arke Renova Panjaitan Sani Sani Yonathan Juanto