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All Journal Eksergi: Chemical Engineering Journal Jurnal Matematika dan Ilmu Pengetahuan Alam Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Kimia Riset JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Abdi: Media Pengabdian Kepada Masyarakat Jurnal Layanan Masyarakat (Journal of Public Service) Berkala Penelitian Hayati
Handoko Darmokoesoemo
Departemen Kimia, Fakultas Sains Dan Teknologi, Universitas Airlangga
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Social Sciences Other

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Pemanfaatan Nanokitosan Sebagai Coating Agent dalam Pembuatan Pupuk NPK Berbasis Control Release Fertilizer Sastra, Richad Ade; Adiarto, Totok; Prasetyo, Antonius Budi; Darmokoesoemo, Handoko; Putri, Devi Indrasari Mustopa
Eksergi Vol 20 No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.10699

Abstract

Kitosan merupakan biopolimer yang terdiri atas monomer glukosamin serta memiliki potensi sangat besar untuk dikembangkan sebagai biomaterial. Berdasarkan karakternya, kitosan larut dalam asam lemah dan tidak larut dalam air. Pada penelitian ini, kitosan dimodifikasi menjadi ukuran nano (nanokitosan) untuk meningkatkan kapabilitasnya sebagai membran dan digunakan sebagai coating agent dalam pembuatan pupuk NPK yang berbasis Control Release Fertilizer. Sintesis nanokitosan dilakukan dengan metode gelasi ionik dengan memberikan variasi pada lama pengadukan dan konsentrasi crosslinker. Variasi lama waktu pengadukan yang diberikan adalah 5 menit, 10 menit, dan 15 menit. Crosslinker yang digunakan dalam penelitian ini adalah Sodium Tripolyphosphate (STPP) dengan variasi konsentrasi 0,2%; 0,25%; 0,3%. Dari hasil uji release yang dilakukan, didapatkan nanokitosan dengan variasi lama pengadukan 15 menit dengan konsentrasi STPP 0,3% sebagai variasi yang paling optimal dengan release paling kecil. Melalui karakterisasi PSA, didapatkan ukuran nanokitosan tersebut sebesar 202,1 nm, dengan bentuk morfologi yang berbentuk bulatan teraglomerasi pada hasil SEM. Karakterisasi XRD yang didapatkan menunjukkan bahwa partikel bersifat amorf. Sedangkan pada hasil FTIR, didapatkan perbedaan vibrasi antara kitosan dengan nanokitosan pada bagian ikatan crosslink yang terbentuk.
Increasing Production, Improving Product Quality, and Empowering the Cracker Entrepreneur Group in Ngelom Pesantren Village A'yuni, Qurrota; Widati, Alfa Akustia; Raharjo, Yanuardi; Pudjiastuti, Pratiwi; Adiarto, Tokok; Harsini, Muji; Prasetyo, A. Budi; Supriyanto, Ganden; Darmokoesoemo, Handoko; Izzah, Adiba Naila; Haula', Hamizah; Hermawan, Hamzah Hilmy; Rizqullah, Almaysh Haidar
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 12 No. 1 (2026): Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.12.1.139-150

Abstract

This community service aims to assist by disseminating technology related to production equipment, which will help increase both the quantity and quality of products. Additionally, the program offers training on oil quality and teaches how to process waste cooking oil into soap. This community service activity is a way to achieve SDGs in the Decent Work and Economic Growth category through Small Entrepreneur and the Rural Economy. The activities were held in Ngelom Pesantren Village from April until September 2023 to overcome the priority problems that exist in the cracker entrepreneur group. The participants of this activity were a group of cracker entrepreneurs in Ngelom Pesantren Village, totaling 30 participants. Activities were carried out through research methods, workshops, and procurement of tools to improve the production process and quality of cracker products. The workshop topics covered halal certification of food products, oil quality standards, and making soap from waste cooking oil. The survey results showed that participants had a satisfaction level of 92% towards the activities and 93% towards the procurement of tools provided, and the production increased by 202.78%. In addition, the crackers are less greasy and the packaging is well-sealed, which can improve the quality of cracker products.
Use of Placuna placenta Shells as Green Adsorbent for Pb(II) Ions Sequestration from Aqueous Solution Kuncoro, Eko Prasetyo; Matondang, Claudia Deborah Pretty; Hidayat, Muchlis Fajar; Darmokoesoemo, Handoko
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 3 (2023): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v8i3.77618

Abstract

Heavy metal treatment is crucial to mitigate these elements' adverse environmental impacts. Among various remediation methods, adsorption stands out due to its simplicity and high efficiency. In this context, Placuna placenta shell, a biowaste, has been explored for its potential in treating wastewater contaminated with Pb(II) ions. This research was designed to assess the Placuna placenta shell's proficiency in removing Pb(II) ions from aqueous solutions. The study involved two main components: an adsorption test to evaluate the heavy metal removal capability of the Placuna placenta shel and a comprehensive characterization of the shell-based adsorbent. The adsorption experiments were conducted using a batch system, where variables such as pH levels and contact time were meticulously altered to determine their effect on the adsorption efficiency. Concurrently, the adsorbent underwent thorough characterization through Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD) analysis. The experimental findings indicated that the optimal conditions for maximum Pb(II) ion removal were achieved at a pH of 7 and a contact time of 120 minutes. The FTIR analysis of the adsorbent revealed the presence of calcium carbonate (CaCO3), a finding further substantiated by the XRD analysis results. Additionally, SEM imaging provided visual evidence of metal ion deposition on the aggregates of the adsorbent. The study demonstrated that the Placuna placenta shell exhibits promising qualities as an adsorbent for removing heavy metals from contaminated water sources. This finding highlights the potential of utilizing biowaste in environmental remediation and offers a sustainable approach to addressing heavy metal pollution.
Co-Authors A. Budi Prasetya A.M. Albrecht Gary Adiarto, Totok AFAF BAKTIR Ahmadi Jaya Permana Alfa Akustia Widati Aziz, Rizky Abdul Badrud Tamam Ibnu Ali Budi Prasetyo, Antonius Denny Ika Rahmawati Eko Prasetyo Kuncoro Fatiha Khairunnisa Fetty, Amelia Julia Tria Ganden Supriyanto Hani Sudarmanto Harsasi Setyawati Hartati Hartati Hartati Hartati Haula', Hamizah Hermawan, Hamzah Hilmy Hidayat, Muchlis Fajar Hwei Voon, Lee Ishma, Ervina Fadhilatul Izzah, Adiba Naila Kautsar Ul Haq Mas Loegito Matondang, Claudia Deborah Pretty Mirartul Khasanah Miratul Khasanah Mochamad Zakki Fahmi Muji Harsini Mulyadi Tanjung Nadhifa Aliyya Himawan Nesti Widayanti Ni Nyoman Tri Puspaningsih Prasetyo, A. Budi Prasetyo, Antonius Budi Pudjiastuti, Pratiwi Purkan Purkan, Purkan Purwaningsih, Aning Putri, Devi Indrasari Mustopa Qurrota A’yuni Rico Ramadhan, Rico Rizqullah, Almaysh Haidar Salsabila, Fara Sastra, Richad Ade Sediono, Sediono Sofijan Hadi Sri Sumarsih Suyanto suyanto Tokok Adiarto Totok Ardiarto Trisnadi Widyaleksono Catur Putranto Yanuardi Raharjo, Yanuardi