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All Journal Innofarm Jurnal Inovasi Pertanian SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Akademika Kimia Arus Jurnal Psikologi dan Pendidikan Jurnal Akademika Kimia
Puji Ardiningsih
Universitas Tanjungpura
Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Karakterisasi Biochar dari Ampas Tebu dan Kemampuan Penyerapan Nitrogen Sebagai Amelioran Pada Tanah Gambut Secara In Vitro Warsidah Warsidah; Suparnawati Suparnawati; Anthoni Batahan Aritonang; Puji Ardiningsih; Asri Mulya Ashari; Mega Sari Juane Sofiana
Innofarm:Jurnal Inovasi Pertanian Vol. 23 No. 1 (2021): Innofarm : Jurnal Inovasi Pertanian
Publisher : FAKULTAS PERTANIAN UNIVERSITAS SLAMET RIYADI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33061/innofarm.v23i1.5604

Abstract

Research has been carried out on the characterization of biochar pores produced from bagasse through a pyrolysis process at a temperature of 110oC for 4 hours, using the Scaning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX) method. The biochar of sugarcane pulp produced is then tested for its ability to absorb nitrogen content (% N-total), with the source of N is urea fertilizer through the Kjedhal method based on SNI (2801: 2010), and the source of nitrogen from a solution of ammonium sulfate (NH4)2SO4 by the titrimetric method. The SEM measurement results showed that the biochar pores were uniform and micro-sized, while the peat pores were macro in size and irregular. EDX results show that biochar is composed of 100% carbon, while peat soil consists of carbon compounds (C), Oxygen (O) Silica (Si) and Aluminum (Al). Both of biochar and peat have moisture content of 0.38% and 11.79%, ash content of 2.42% AND 24.44%, volatile content of 0.53% and 5.23% of bound or fixed carbon (cf) of 97.02% and 58.53%. The results of the biochar capacity test applied to peat soils can increase the pH of the peat from 5 to 6.5 with the ability to absorb N-total from urea (NH2)2CO and N-total fertilizer sources from ammonium sulfate (NH4)2SO4 solution of 38% - 66%, and 56.5% -84.5%.
Synthesis and Characterisation of B-CDs/TiO2 Composite Anthoni B. Aritonang; Ajuk Sapar; Uswatun Hasanah; Adhitiyawarman Adhitiyawarman; Puji Ardiningsih
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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Abstract

Synthesis of composite boron-doped carbon nanodots (B-CDs)/TiO2 using the sol-gel method performed with titanium tetraisopropoxide (TTIP) precursor and B-CDs prepared by the microwave method using citric acid monohydrate, urea, and boric acid as precursors. The optimum concentration of boron dopant (B) on B-CDs/TiO2 is 0.5% boron (w/w) which is then used as a composite on TiO2 resulting in a brown solid and has blue luminescent under UV light. The result with UV-Vis/DRS for variation in B-CDs concentration of 0.5%, 1.25%, and 2.5% showed Eg values of 2.34 eV, 2.00 eV, and 2.29 eV. B-CDs cause the maximum emission peak (λEm) to redshift and affect the intensity of photoluminescence TiO2. The characterization of FT-IR does not indicate a new peak, there is no bonding in the B-CDs/TiO2 composite. The TiO2 diffractogram was observed to shift towards a larger 2θ which caused the crystallinity of TiO2 to decrease. Based on the photocatalytic activity test on the degradation of methylene blue solution, it showed fairly good activity. It is expected that the B-CDs/TiO2 composite has the potential to be applied as a photocatalyst to degrade organic pollutants under visible light illumination.
Synthesis and Characterisation of B-CDs/TiO2 Composite Anthoni B. Aritonang; Ajuk Sapar; Uswatun Hasanah; Adhitiyawarman Adhitiyawarman; Puji Ardiningsih
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Synthesis of composite boron-doped carbon nanodots (B-CDs)/TiO2 using the sol-gel method performed with titanium tetraisopropoxide (TTIP) precursor and B-CDs prepared by the microwave method using citric acid monohydrate, urea, and boric acid as precursors. The optimum concentration of boron dopant (B) on B-CDs/TiO2 is 0.5% boron (w/w) which is then used as a composite on TiO2 resulting in a brown solid and has blue luminescent under UV light. The result with UV-Vis/DRS for variation in B-CDs concentration of 0.5%, 1.25%, and 2.5% showed Eg values of 2.34 eV, 2.00 eV, and 2.29 eV. B-CDs cause the maximum emission peak (λEm) to redshift and affect the intensity of photoluminescence TiO2. The characterization of FT-IR does not indicate a new peak, there is no bonding in the B-CDs/TiO2 composite. The TiO2 diffractogram was observed to shift towards a larger 2θ which caused the crystallinity of TiO2 to decrease. Based on the photocatalytic activity test on the degradation of methylene blue solution, it showed fairly good activity. It is expected that the B-CDs/TiO2 composite has the potential to be applied as a photocatalyst to degrade organic pollutants under visible light illumination.
Pembuatan lilin dari minyak jelantah: pelatihan peningkatan keterampilan dan nilai tambah produk rumah tangga bagi ibu rumah tangga di Kecamatan Entikong Kalimantan Barat Risya Sasri; Winda Rahmalia; Lia Destiarti; Adhitiyawarman Adhitiyawarman; Puji Ardiningsih; Afghani Jayuska; Berlian Sitorus; Anthoni B. Aritonang; Firman Shantya Budi; Nurlina Nurlina; Elliska Murni Harfinda; Ferdinand Hidayat
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 10, No 3 (2026): June
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v10i3.38992

Abstract

Abstrak Program Pengabdian kepada Masyarakat ini dilakukan dengan tujuan untuk memberdayakan ibu rumah tangga di Kecamatan Entikong melalui pelatihan keterampilan pengolahan minyak jelantah menjadi lilin. Kegiatan ini menggabungkan aspek edukasi lingkungan, peningkatan keterampilan praktis, serta pembukaan peluang ekonomi skala rumah tangga. Dengan pendekatan partisipatif dan praktik langsung, diharapkan peserta tidak hanya mendapatkan pengetahuan baru, tetapi juga mampu mereplikasi proses pembuatan lilin secara mandiri. Pelaksanaan kegiatan PKM dilakukan dalam beberapa tahap antara lain, persiapan, pelaksanaan dan evaluasi program PKM. Tahap persiapan meliputi orientasi lapangan dalam rangka mengidentifikasi masalah mitra dan kesepakatan teknologi yang akan diimplementasikan, perijinan dan sosialisasi.  Dilanjutkan dengan tahap pelaksanaan yang meliputi Pelatihan Pembuatan Lilin diawali dengan 1).Pengenalan bahan tambahan (asam stearat , pewarna, aromaterapi opsional); 2). Praktik pembuatan lilin dari minyak jelantah; 3). Pencetakan dan pendinginan lilin; 4). Tips keamanan dan penyimpanan. Pada tahap akhir dilakukan evaluasi secara kuantitatif dengan menganalisis kuesioner pengetahuan awal dan kuesioner evaluasi lanjutan. Dibuat bukti tertulis terkait keberhasilan pelaksanaan program. Kegiatan ini merupakan bentuk kontribusi Jurusan Kimia FMIPA Universitas Tanjungpura dalam mendukung pengelolaan limbah yang bertanggung jawab, pemberdayaan perempuan, serta pembangunan berkelanjutan di wilayah perbatasan. Kata kunci: lilin; minyak jelantah; perbatasan; pengabdian; pelatihan. Abstract This Community Service Program aims to empower homemakers in Entikong District through training in processing used cooking oil into candles. This activity combines aspects of environmental education, improving practical skills, and opening up economic opportunities on a household scale. With a participatory approach and direct practice, it is hoped that participants will not only gain new knowledge but also be able to replicate the candle-making process independently. The implementation of the PKM activity is carried out in several stages, including preparation, implementation, and evaluation of the PKM program. The preparation stage includes fieldwork in order to identify partner problems and technological agreements to be implemented, licensing, and socialization, and is continued with the implementation stage, which includes Candle Making Training, starting with 1). Introduction to additional materials (stearin, dyes, optional aromatherapy); 2). Practice making candles from used cooking oil; 3). Molding and cooling candles; 4). Safety and storage tips. In the final stage, a quantitative evaluation is conducted by analyzing the results of the pretest and posttest, as well as the questionnaire responses before and after the activity is implemented. Written evidence is made regarding the success of the program implementation. This activity is a contribution from the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Tanjungpura, in support of responsible waste management, women's empowerment, and sustainable development in border areas. Keywords: candles; used cooking oil; borders; community service; training.
Implikasi Proses Pembelajaran secara Luring dan Daring terhadap IPK Mahasiswa FMIPA Universitas Tanjungpura Sukal Minsas; Elvi Rusmiyanto P.W.; Reny Puspita Sari; Endah Sayekti; Hasanuddin; Muhardi; Nurfitri Imroah; Yudhi; Puji Ardiningsih; Irma Nirmala
Arus Jurnal Psikologi dan Pendidikan Vol 5 No 1: Februari (2026)
Publisher : Arden Jaya Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57250/ajpp.v5i1.2355

Abstract

Studi ini bertujuan untuk menganalisis dampak proses pembelajaran daring dan luring terhadap kepuasan mahasiswa dan korelasinya dengan peningkatan Indeks Prestasi Kumulatif (IPK) di Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Tanjungpura. Metode survei diterapkan dengan menggunakan pengambilan sampel acak bert stratified, melibatkan 437 responden dari berbagai program studi. Instrumen penelitian diuji validitas dan reliabilitasnya, menghasilkan nilai alpha Cronbach sebesar 0,917, menunjukkan reliabilitas yang tinggi. Data dianalisis menggunakan skala Likert untuk mengukur kepuasan mahasiswa di berbagai aspek pelayanan akademik. Hasil penelitian menunjukkan bahwa kualitas pelayanan akademik termasuk dalam kategori baik–sangat baik, dengan skor interval rata-rata berkisar antara 3,01 hingga 3,43. Analisis IPK menunjukkan peningkatan yang signifikan pada pembelajaran daring (3,12–3,48) dan hibrida (3,37–3,42) dibandingkan dengan pembelajaran luring (3,09–3,18). Hasil ini menegaskan bahwa variasi metode pembelajaran memengaruhi prestasi akademik mahasiswa, sementara survei kepuasan memberikan dasar empiris untuk pembuatan kebijakan guna meningkatkan kualitas akademik di Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Tanjungpura.
Co-Authors Adhitiyawarman, Adhitiyawarman Afghani Jayuska Ajuk Sapar Anthoni B. Aritonang Aritonang, Anthoni Batahan Ashari, Asri Mulya Berlian Sitorus Elliska Murni Harfinda Elvi Rusmiyanto P.W. Endah Sayekti Ferdinand Hidayat Firman Shantya Budi Hasanuddin Hasanuddin Irma Nirmala Lia Destiarti Mega Sari Juane Sofiana Muhardi Nurfitri Imroah Nurlina, Nurlina Reny Puspita Sari Risya Sasri Sukal Minsas Suparnawati Suparnawati Uswatun Hasanah Warsidah Warsidah Winda Rahmalia Yudhi