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All Journal Journal Of Chemical Process Engineering (JCPE) International Journal of Studies in International Education
Deritawati Deritawati
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Languange, Linguistic, Communication & Media Mathematics Public Health Social Sciences

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PEMANFAATAN LIGNIN DARI LIMBAH KULIT BUAH COKLAT SEBAGAI ADSORBEN LOGAM (Cu) DENGAN PENAMBAHAN CaCO3 Deritawati Deritawati; Waliyadin Waliyadin; Rismawati Rasyid; N Nurjannah
Journal of Chemical Process Engineering Vol 2, No 2 (2017)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.89 KB) | DOI: 10.33536/jcpe.v2i2.164

Abstract

Logam Cu dalam konsentrasi tertentu dapat memberikan efek toksik yang berbahaya bagi kehidupan manusia dan lingkungan di sekitarnya. Salah satu cara sederhana dan ekonomis yang dapat dilakukan untuk menyerap logam Cu dengan cara adsorpsi dengan menggunakan bahan berpori. Penelitian ini bertujuan untuk menentukan Waktu dan pH optimum pada proses penyerapan Cu oleh lignin. Sampel kulit Cacao didapatkan di Mamuju Sulawesi Barat, sampel diprepasi terlebih dahulu kemudian diektraksi dengan Benzen:Ethanol. Setelah itu lignin diisolasi menggunakan NaOH, kemudian diendapkan menggunakan H2SO4 sehingga didapatkan sampel lignin murni. Lignin yang telah dikeringkan dikontakkan dengan larutan Cu pada Variabel pH dan Waktu. Dari hasil penelitian menunjukkan bahwa pH dan waktu kontak berpengaruh terhadap banyaknya konsentrasi Cu yang diadsorsi oleh lignin. Semakin banyak waktu yang dikontakkan antara larutan Cu dan lignin maka semakin banyak pula Cu yang diadsorpsi oleh lignin. Sedangkan pH basa akan menyebabkan berkurangnya daya kerja adsorben dari lignin, dan lebih baik pada pH Asam. Penelitian dapat disimpulkan bahwa pH optimum pada proses penyerapan logam Cu oleh lignin ialah pada pH larutan 6. Waktu kontak optimum pada proses penyerapan logam Cu oleh lignin ialah pada waktu 40 Menit. 
The Use of Digital Media to Improve Performance and Learning Skills in Bintan State Extraordinary Schools (SLB) Deritawati Deritawati; Muhajir Muhajir; Nuril Huda
International Journal of Studies in International Education Vol. 2 No. 1 (2025): International Journal of Studies in International Education
Publisher : Asosiasi Riset Ilmu Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/ijsie.v2i1.247

Abstract

This study aims to explore the use of canva digital media in improving achievement and learning skills at the Bintan State Special School (SLB). In the digital era, inclusive education is a priority to provide equal opportunities for students with special needs. Digital media such as interactive learning apps, videos, and other digital aids are used to assist deaf, visually impaired, and students with other special needs in improving their learning abilities. This study uses a descriptive qualitative method, with participatory observation and interviews as data collection techniques. The results of the study show that the use of digital media at SLB Negeri Bintan contributes positively to increasing students' learning motivation and independence. The use of digital aids, such as voice-based applications and interactive videos, makes it easier for students to understand the subject matter, especially those with visual or hearing impairments. Despite challenges such as limited infrastructure and training for teachers, digital media has been shown to significantly improve student academic achievement. This study concludes that digital media has great potential to create a learning environment that is more inclusive, adaptive, and responsive to the needs of students with special needs. Appropriate technology support and increased training for educators will strengthen the implementation of digital media in learning at SLB.
Co-Authors Muhajir Muhajir N Nurjannah, N Nurjannah Nuril Huda Rismawati Rasyid Waliyadin, Waliyadin