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All Journal Jurnal Pengabdian UntukMu NegeRI Indonesian Journal of Chemical Analysis (IJCA)
Itnawita
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Optimization of Contact Time and Stirring Speed in The Adsorption of Cd(II) Using Acacia crassicarpa Bark Powder as Adsorbent Mukhlis; Hidayah, Nurul; Hanifah, Abu; Itnawita; Anita, Sofia; Devi, Silvera; Tamboesai, Emrizal Mahidin
Indonesian Journal of Chemical Analysis (IJCA) Vol. 8 No. 2 (2025): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol8.iss2.art2

Abstract

Acacia crassicarpa bark powder showed potential as an adsorbent due to its high cellulose content of approximately 50%. This research aimed to determine the optimum contact time, stirring speed, and adsorption kinetic models of Acacia crassicarpa bark powder for Cd(II) removal. Adsorbent characterization was conducted using a Surface Area and Pore Size Analyzer, FTIR, and SEM-EDX, while batch adsorption experiments were conducted to evaluate performance. The adsorbent exhibited a specific surface area of 0.460 m²/g and pore diameters ranging from 32.707 to 45.426 Å, indicating mesoporous characteristics. FTIR analysis identified functional groups such as O–H, C=O, and O–Cd. SEM-EDX analysis before adsorption revealed a rough surface with open, irregular pores and dominant elements including C, N, and O. After adsorption, the surface appeared smoother, with pores filled by Cd(II), as confirmed by Cd peaks in the EDX spectrum. Optimum conditions were obtained at a contact time of 70 minutes and a stirring speed of 120 rpm, resulting in an adsorption efficiency of 96.93% and a 1.3613 mg/g capacity. The adsorption kinetics followed a pseudo-second-order model (R2 = 0.9985), indicating that the adsorption mechanism occurred via chemisorption.
Pengolahan Sampah Organik Rumah Tangga Menjadi Sabun Cair Eco-Enzym: Pemberdayaan dan Pelatihan di Desa Bungaraya Sophia, Halida; Mukhlis; Awaluddin, Amir; Emrizal M. Tamboesai; Silvera Devi; Siregar, Siti Saidah; Tengku Abu Hanifah; Muras , Yuharmen; Itnawita
Jurnal Pengabdian UntukMu NegeRI Vol. 9 No. 2 (2025): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v9i2.9638

Abstract

Pengelolaan sampah organik rumah tangga merupakan tantangan lingkungan yang signifikan di Desa Bungaraya, yang berdampak negatif terhadap kebersihan lingkungan dan kesehatan masyarakat. Program pengabdian ini bertujuan untuk memberdayakan masyarakat dalam mengurangi limbah organik melalui pelatihan pembuatan sabun cair eco-enzyme. Metode yang digunakan meliputi penyuluhan, demonstrasi, dan praktik langsung, dengan partisipasi aktif sebanyak 30 warga. Hasil kegiatan menunjukkan peningkatan pengetahuan dan keterampilan peserta terkait pengelolaan sampah dan produksi eco-enzyme. Selain berkontribusi dalam mengurangi sampah organik, produk sabun cair yang dihasilkan bernilai ekonomi dan dapat dimanfaatkan secara pribadi maupun dijual untuk menambah pendapatan rumah tangga serta memberikan kontribusi terhadap keberlanjutan lingkungan sekaligus menguatkan potensi ekonomi berbasis komunitas.
Co-Authors Abu Hanifah Amir Awaluddin Emrizal M. Tamboesai Emrizal Mahidin Tamboesai Halida Sophia Mukhlis Muras , Yuharmen NURUL HIDAYAH Silvera Devi Siregar, Siti Saidah Sofia Anita Tengku Abu Hanifah