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All Journal Jurnal Teknik Kimia Journal of Research and Technology
Widodo, Laurentius Urip
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Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Industrial & Manufacturing Engineering

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ADSORPSI LOGAM Fe DALAM MINYAK NILAM MENGGUNAKAN KITOSAN SISIK IKAN Manalu, Nadia Kresentia; Presetyo, Dimas; Widodo, Laurentius Urip
Jurnal Teknik Kimia Vol 14, No 1 (2019): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v14i1.1652

Abstract

Minyak nilam merupakan komoditas ekspor yang besar untuk indonesia. Namun kualitas minyaknilam di indonesia masih sangat rendah. Hal ini dibuktikan dengan masih banyaknya logam Fe yangterdapat di dalam minyak nilam. Salah satu cara mengurangi kadar logam Fe tersebut yaitu, menggunakanadsorben kitosan. Kitosan dibuat dari sisik ikan mujair yang telah melewati tiga tahap proses yaknideproteinasi, demineralisasi dan deasetilasi. Kitosan yang terbentuk kemudian ditambahkanke dalam 200 mlminyak nilam dengan variasi 1%,2%,3%,4%, dan 5% ke dari berat minyak nilam. Kemudian dilakukanproses pengadukan dengan suhu pemanasan dijaga pada 400C dengan variasi waktu 30,45,60,75, dan 90menit. Hasil yang diperoleh menunjukkan proses adsorpsi yang paling baik pada penambahan kitosan 5%dengan waktu pengadukan 90 menit yaitu dengan kadar Fe dalam minyak nilam sebesar 5.83 mg / Kg.Kata kunci: , adsorben kitosan; logam Fe; minyak nilam; sisik ikan DOI : https://doi.org/10.33005/jurnal_tekkim.v14i1.1652
PIRING KUE BERBAHAN CMC DENGAN PELAPIS EDIBLE FILM DARI TALAS SATOIMO Sidik, Virgin Citra perdana; Pratiwi, Shinta Budi; Widodo, Laurentius Urip
Jurnal Teknik Kimia Vol 15, No 2 (2021): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v15i2.2546

Abstract

Satoimo (Colocasia esculenta (L.) Schott var antiquorum) merupakan salah satu jenis talas yangmemiliki ukuran umbi kecil (small corm taro) disebut juga sebagai talas jepang. CMC (Carboxy MethylCellulose) memiliki rumus molekul C8H16NaO8, bersifat biodegradable, tidak berwarna, tidak berbau,tidak beracun, berbentuk butiran atau bubuk yang larut dalam air namun tidak larut dalam larutanorganik. Penelitian ini memanfaatkan CMC dan pati talas Satoimo dijadikan produk edible film yaituberupa Piring Kue yang dapat dimakan serta untuk upaya mengurangi dampak negatif dari piringkertas yang membutuhkan waktu cukup lama dalam proses penguraiannya di lingkungan. PengolahanEdible film diawali dengan melarutkan 3gr kitosa dengan asam asetat 1%, melarutkan pati satoimo (1;1,5; 2 ; 2,5 ; 3 gr) dengan aquadest. Mencampurkan larutan Pati Satoimo-aquadest kedalam larutankitosan-asam asetat dan 10ml gliserol, dicetak, dioven suhu 70oC. Kemudian melarutkan CMC(0,1;0,2;0,3;0,4;0,5 %w/v) dengan aquadest, didiamkan suhu 4oC, dicetak, dioven suhu 70oC. Kemudianmenggabungkan Edible film dengan CMC dioven suhu 70oC, didiamkan suhu 25oC. Dari hasil penelitiandiperoleh hasil yang optimum, komposisi pati: CMC (3 gram: 0,5%) kuat tarik 0,454 MPa, Kuattekan 0,3572 MPa, Ketebalan 3,92 mm. Serta persentase kelarutan 50 % komposisi pati: CMC (3 gram:0,1%).DOI : https://doi.org/10.33005/jurnal_tekkim.v15i2.2546
PEMBUATAN ADSORBEN BERBAHAN BAKU TANAH LIAT DARI LIMBAH INDUSTRI PENCUCIAN PASIR SILIKA DENGAN PERBEDAAN KONSENTRASI HCl DAN WAKTU AKTIVASI Widodo, Laurentius Urip; Najah, Safinatun; Istiqomah, Cahya
Journal of Research and Technology Vol. 6 No. 1 (2020): JRT Volume 6 No 1 Jun 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.767 KB) | DOI: 10.55732/jrt.v6i1.134

Abstract

Clay is silicate frame-based mineral praticle with a diameter of less than 4 micrometers, clay contains fine fused silica and aluminium. The development of clay as an alternative adsorbent is very possible because the clay has a large surface area, high porosity, and high abundance in nature and also relatively inexpensive compared to other adsorbents. The purpose of this study was to determine the ratio of SiO₂/Al₂O₃ content in activated clay. Clay was activated by using hydrochloric acid (HCl) with variable time and concentration of Hydrochloric Acid. Variable concentrations of hydrochloric acid used were 1N, 2N, 3N, 4N, 5N 1000 ml and time variables were 1 hour, 1.5 hours, 2 hours, 2.5 hours, and 3 hours. The best ratio results were shown at 5 N hydrochloric acid (HCl) concentration with 3 hours activation time of 12,26%.
PEMANFAATAN LIMBAH BATANG UBI KAYU DAN PLASTIK SEBAGAI BAHAN BAKU PEMBUATAN PAPAN PARTIKEL Widodo, Laurentius Urip; Pratama, Fibriangi Miya Enggar; Prastya, Sandika Mudji
Journal of Research and Technology Vol. 6 No. 1 (2020): JRT Volume 6 No 1 Jun 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (539.099 KB) | DOI: 10.55732/jrt.v6i1.150

Abstract

Particle board consists of sheets of material made from wood chips or materials containing lignocellulose such as flakes and strands to be joined by using a binder and by providing various aids such as heat and press. The purpose of this research was to study the physical value (moisture content, thickness development, and density) and mechanical properties (elasticity and tensile strength) and its conformity to SNI. Particle board making in this study was a mixture of wood powder with plastic Low Density Polyethylene (LDPE) with a composition according to variable pressure pressed with 25 kg/cm2 with long pressing at the required temperature for an hour and added with 30 minutes of packing. The variables used were temperature and material composition. The making of particle board from cassava powder and plastic LDPE based on air content test, thickness development, and straight tensile strength were appropriate to SNI. The best results obtained in this study was the composition comparison of plastic LDPE: wood powder (80; 20) with a temperature of 160℃ with a moisture content of 1,2027%, thickness development of 9.217 %, density of 0,831 g/cm3, MOE of 21304,600 kgf/cm2, and perpendicular tensile strength of 31,094 kgf/cm2. This particle board passed all tests and have the average value and better characteristics compared to others.
Co-Authors Istiqomah, Cahya Manalu, Nadia Kresentia Najah, Safinatun Prastya, Sandika Mudji Pratama, Fibriangi Miya Enggar Pratiwi, Shinta Budi Presetyo, Dimas Sidik, Virgin Citra perdana