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All Journal Jurnal Pengelolaan Laboratorium Pendidikan
Esti Prihatini
IPB University
Education

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Pengembangan Metode Daur Ulang Limbah Silika Fase Diam Kromatografi Untuk Kegiatan Praktikum Di Laboratorium Rohmat Ismail; K Kurniawanti; S Sabur; Esti Prihatini
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.91-98

Abstract

Silika merupakan salah satu limbah laboratorium yang dapat merusak lingkungan. Daur ulang limbah silika mampu meminimalisasi jumlah limbah di laboratorium. Proses daur ulang limbah silika gel terdiri dari empat tahapan yaitu pencucian dengan metanol dan aseton secara maserasi, proses sonikasi dengan gelombang ultrasonik, pemanasan dengan tanur pada suhu 600oC selama 8 jam dan karakterisasi dengan radiasi sinar UV dan FTIR. Hasil karakterisasi dengan radiasi sinar UV pada berbagai perlakuan daur ulang limbah silika gel dapat membuktikan bahwa lama dan jumlah ulangan pencucian berpengaruh terhadap tingkat keberhasilan daur ulang limbah silika. Hal tersebut dapat diindikasikan dengan noda atau area hitam yang semakin memudar. Perlakuan proses daur ulang terbaik berdasarkan karakterisasi dengan lampu UV dilanjutkan proses karakterisasinya dengan FTIR. Berdasarkan hasil karakterisasi dengan radiasi sinar UV dan FTIR perlakuan terbaik untuk proses daur ulang limbah silika gel pada penelitian ini adalah pada perlakuan dengan proses tiga kali pencucian metanol dan aseton dalam waktu 6 jam dalam setiap tahap pencucian.  
Uji Performa Alat Vakum Tekan Termodifikasi Untuk Impregnasi Kayu Esti Prihatini; Rohmat Ismail; Istie Sekartining Rahayu; Rizky Ramdhani
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.75-82

Abstract

The impregnation process is carried out to increase the resistance of wood from the attack of microorganisms such as fungi and termite attacks by placing the wood in a vacuum tube and then placing an impregnan solution into it. The limited ability of impregnation tubes is an obstacle in carrying out research and practicum activities, therefore there needs to be modifications to the impregnation tube so that the impregnation process can provide better results. Verification of the results of impregnation is done by calculating the value of weight percent gain (WPG) and relative standard deviation (%RSD) for the test of the level of appreciation. Based on the results of the experiment the highest %WPG value in the water impregnan solution was obtained from the parameter conditions of the type 3 press vacuum tool, which is with a time of 1 hour and a pressure of 5 bars and is worth (178.29±10.97). The highest %WPG value in boron solution of 5% is obtained from the condition of the type 6 press vacuum tool with a time of 3 hours and a pressure of 5 bars and is worth (5.16±0.45). The smallest %RSD value of water impregnan solution is achieved under the parameter conditions of type 4 tools at 3 hours and pressure 1 bar and is worth 3.99%. The smallest %RSD value of boron impregnan solution is 5% achieved under the parameter conditions of type 2 tools, namely within 1 hour and pressure of 3 bars and is worth 5.36%.
Co-Authors Istie Rahayu K Kurniawanti Rizky Ramdhani Rohmat Ismail Rohmat Ismail S Sabur