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Adsorption of Fe(III) Ion in Tablets Fe Supplement by Black Tea Dregs and its Application in Inorganic Chemistry Learning Yuli Nurmayanti; Detris Poba; Meida E. Marpaung
Jurnal Akademika Kimia Vol. 11 No. 3 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i3.pp197-201

The study of the adsorption of Fe(III) ion in Fe supplement by black tea dregs has been done. This study aims to investigate: (a) the Adsorption ability of Fe(III) ion in Fe supplement by black tea dregs (b) the Analysis result of Fe(III) amounts in a sample of Fe supplement when using black tea dregs. Several parameters were analyzed, such as; water and ash contents of the adsorbent, the optimum time, and the concentration of ion Fe(III) with tea dregs in a buffer medium (pH 4,8). The analysis of sample solution concentration of Fe(III) in this study using Genesys spectrophotometry at 590 nm. The result showed that the water and ash contents were 3.03 % and 0.9 %, respectively. Small percentages indicate that the adsorbent has met the standard (SNI) 06–3730-1995. The time and concentration optimum adsorption of Fe(III)-tea dregs were 60 minutes and 100 mg/L, respectively. The result of the adsorption ability of Fe(III) ion in Fe supplement by tea dregs was 70.4% with the adsorption concentration of ion Fe(III) were 7.07 mg/L. The research results obtained can be used as teaching materials for inorganic chemistry learning, and as a reference for new materials in the field of coordination chemistry and materials.

Adsorption of Fe(III) Ion in Tablets Fe Supplement by Black Tea Dregs and its Application in Inorganic Chemistry Learning Yuli Nurmayanti; Detris Poba; Meida E. Marpaung
Jurnal Akademika Kimia Vol. 11 No. 3 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i3.pp197-201

The study of the adsorption of Fe(III) ion in Fe supplement by black tea dregs has been done. This study aims to investigate: (a) the Adsorption ability of Fe(III) ion in Fe supplement by black tea dregs (b) the Analysis result of Fe(III) amounts in a sample of Fe supplement when using black tea dregs. Several parameters were analyzed, such as; water and ash contents of the adsorbent, the optimum time, and the concentration of ion Fe(III) with tea dregs in a buffer medium (pH 4,8). The analysis of sample solution concentration of Fe(III) in this study using Genesys spectrophotometry at 590 nm. The result showed that the water and ash contents were 3.03 % and 0.9 %, respectively. Small percentages indicate that the adsorbent has met the standard (SNI) 06–3730-1995. The time and concentration optimum adsorption of Fe(III)-tea dregs were 60 minutes and 100 mg/L, respectively. The result of the adsorption ability of Fe(III) ion in Fe supplement by tea dregs was 70.4% with the adsorption concentration of ion Fe(III) were 7.07 mg/L. The research results obtained can be used as teaching materials for inorganic chemistry learning, and as a reference for new materials in the field of coordination chemistry and materials.

Pelatihan Penyusunan Instrumen Penilaian Pembelajaran Berdeferensiasi Bagi Guru Kimia Di Kota Palu dengan Alur MERRDEKA Afadil; Nuryanti, Siti; Diah, Anang Wahid M.; Nurmayanti, Yuli; Rahmawati, Sitti
Panrannuangku Jurnal Pengabdian Masyarakat Vol. 4 No. 3 (2024)
Publisher : Lembaga Penelitian dan Pengembangan Teknologi dan Rekayasa, Yayasan Ahmar Cendekia Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/panrannuangku3113

Musyawarah Guru Mata Pelajaran (MGMP) Kimia di Kota Palu menyadari pentingnya melakukan berbagai upaya agar proses pembelajaran kimia berjalan baik dari segi penyampaian materi pembelajaran maupun pelaksanaan praktikum di laboratorium merupakan wujud nyata dari pembelajaran yang berdiferensiasi. Permasalahan yang terjadi saat ini berupa: (1) guru masih bingung memaknai strategi pembelajaran berdiferensiasi sebagai bagian dari pembelajaran paradigma baru melalui praktik pembelajaran yang berpusat pada peserta didik; (2) guru belum mampu menerapkan kesatuan siklus pembelajaran yang berawal dari pemetaan kompetensi, perencanaan proses, dan pelaksanaan asesmen pembelajaran; (3) kemampuan guru melakukan perumusan rancangan pembelajaran dan asesmen sesuai dengan karakteristik kebutuhan peserta didik masih kurang, dan (4) guru masih mengalami kendala dalam menyusun instrumen penilaian keberhasilan penerapan strategi pembelajaran berdiferensiasi pada pembelajaran kimia. Peserta pelatihan sebanyak 40 orang yang merupakan guru-guru mata pelajaran kimia yang tergabung dalam kelompok MGMP Kimia SMA Kota Palu. Kegiatan Pengabdian kepada Masyarakat ini bertujuan untuk memberikan pemahaman tentang prinsip penyusunan instrument penilaian strategu pembelajaran berdiferensiasi yang meliputi diferensiasi konten, proses, dan produk pada materi pelajaran kimia pada tingkat SMA atau sederajad dengan alur MERRDEKA. Kegiatan yang akan dilakukan berupa workshop, pelatihan, dan pendampingan yang dilaksanakan dengan model partisipatif.

Analysis Levels of Calcium Oxide (CaO) in Limestone from Leok Village, Biau Sub-district, Buol District Tiwow, Vanny M. A.; Istiqomah, Almia; Abram, Hengky P.; Nurmayanti, Yuli
Jurnal Akademika Kimia Vol. 13 No. 1 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i1.pp20-24

Limestone is one of the rocks that is very abundant in Indonesia and has many benefits, especially in the field of industry. This study aims to determine the levels of calcium oxide (CaO) in limestone at Desa Leok, Kecamatan Biau, Kabupaten Buol. XRF (X-ray fluorescence) was the analytical technique utilized to ascertain the amount of calcium oxide (CaO) present in the limestone. Both the coast area and the hill area provided samples. The measurement results indicate that the level of CaO is 92.41 % in the coast area and 93.74 % in the hill area.

Biochar from Kapuk Randu (Ceiba pentandra) Seeds for Adsorption of Remazol Blue Dye in Wastewater Napitupulu*, Mery; Walanda, Daud Karel; Nakazawa, Koyomi; Poba, Detris; Tiwow, Vanny M A; Nurmayanti, Yuli; Rahma, Sri
Jurnal IPA & Pembelajaran IPA Vol 9, No 3 (2025): SEPTEMBER 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v9i3.47600

The use of synthetic dyes such as remazol by textile companies can harm the environment because they are toxic, long-lasting, and hard to break down. This study aims to find out how well biochar made from randu kapuk seeds can absorb colors in water by determining the best weight, contact time, and pH level. The study's findings indicate that the moisture content of biochar made from randu kapuk seeds at temperatures of 400C, 450C, and 500C is 5.7%, 5.1%, and 4.3%, respectively. The ash concentration at temperatures of 400, 450, and 500 was 7.7%, 6.8%, and 6.3%, respectively. The best amount of biochar tested was 100 mg, which could absorb 25 mg of remazol Blue, giving it an adsorption capacity of 1.65 mg/g. The best time for biochar made from kapuk seeds to absorb remazol Blue was 30 minutes, with an absorption ability of 1.59 mg/g. The optimal pH for the adsorption of remazol Blue was 4, with a capacity of 5.39 mg/g. The results showed that biochar made from kapuk seeds was excellent at soaking up substances and followed certain patterns that suggest it works through a single layer of chemical bonding. This study highlights how effective biochar made from kapuk seeds is as a safe and eco-friendly material for cleaning dye-polluted water, which helps promote sustainable water management in line with SDG 6: clean water and sanitation

Ethnomathscience Identification of Traditional Weapons of Sigi Biromaru H.Mailili, Wahyuni; Gustina, Gustina; Nurmayanti, Yuli; Irmawati, Irmawati
12 Waiheru Vol. 9 No. 2 (2023): 12 Waiheru
Publisher : Balai Diklat Keagamaan Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47655/12waiheru.v9i2.175

This descriptive research uses an ethnographic approach to identify ethnomascience on parts of Sigi Biromaru's traditional weapons that can be used as media and innovation in learning mathematics and science/IPA. The results of literature reviews show that concepts in the fields of mathematics, and science/IPA are found in parts of the traditional weapon described in the descriptions of the table. The results of the research show that the Kaliavo, Guma, and Doke shapes include triangular, square-long, quadrilateral, horizontal, hexadecimal, symmetrical, structural, quadrillary, and straight lines. On the other hand, physical concepts such as momentum, implosive, style, pressure, cultivation, tree morphology biology, tree anatomy, forest ecology, roles and cycles of carbon, forestry, plants, ecosystems, and human interaction with its natural environment, human development, ecological, technological, and cultural. Then ideas about chemistry, such as solid substances, and chemical elements of iron and steel.

PELATIHAN PENGEMBANGAN BAHAN AJAR DIGITAL UNTUK KELOMPOK MGMP KIMIA KOTA PALU MENGGUNAKAN ICE CREAM RECORDER Afadil, Afadil; Rahmawati, Sitti; Nuryanti, Siti; M. Diah, Anang Wahid; Nurmayanti, Yuli
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 6 No. 2 (2022): JUNI
Publisher : LPPM Univ. Ibn Khaldun Bogor

Di masa Pandemi Covid-19 telah terjadi perubahan mendasar dalam pelaksanaan pembelajaran kimia Perkuliahan tatap muka dan praktek di laboratorium untuk mengakomodasi keterhubungan tiga level representasi tidak lagi dapat dilaksanakan. Pembelajaran kimia digantikan secara penuh melalui pembelajaran online. MGMP Kimia di Kota Palu menyadari pentingnya melakukan berbagai upaya agar proses pembelajaran kimia berjalan baik dari segi penyampaian materi pembelajaran maupun pelaksanaan praktikum di laboratorium. Salah satu aplikasi yang bisa digunakan dengan mengkombinasikan berbagai media pembelajaran yang selama ini digunakan oleh guru-guru kimia (antara lain: aplikasi zoom, whatsapp, Google Class Room, LMS, dll) adalah mengunakan Ice Cream Screen Recorder. Peserta pelatihan sebanyak 40 orang yang merupakan guru-guru mata pelajaran kimia yang tergabung dalam kelompok MGMP Kimia SMA Kota Palu. Kegiatan pengabdian pada mitra Musyawarah Guru Mata Pelajaran (MGMP) Kimia kota Palu dalam Bahan Ajar Digital Menggunakan ice cream recorder dalam pembelajaran online, telah terlaksana dengan baik berkat kerjasama yang baik dengan berbagai pihak. Hal tersebut tergambar dengan adanya luaran berupa bahan ajar digital menggunakan ice cream recorder yang telah peserta buat dari hasil pelatihan dan pendampingan pengabdian ini.

TRAINING ON DIFFERENTIATED LEARNING STRATEGIES WITH MERRDEKA FLOW FOR CHEMISTRY TEACHERS IN PALU CITY Afadil, Afadil; Rahmawati, Sitti; Nuryanti, Siti; Diah, Anang Wahid M.; Nurmayanti, Yuli
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 7 No. 4 (2023): DESEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v7i4.2050

The development of the implementation of the independent curriculum today requires learning with a new paradigm to be realized through differentiated learning strategies so that each student learns according to their needs, culture, and stage of development. MGMP Chemistry in Palu City realizes the importance of making various efforts so that the chemistry learning process runs both in terms of delivering learning materials and implementing practicum in the laboratory is a tangible manifestation of differentiated learning. The current problems are (1) teachers are still confused about interpreting differentiated learning strategies as part of a new paradigm of learning through student-centered learning practices, (2) teachers have not been able to apply the unity of the learning cycle starting from competency mapping, process planning, and implementation of learning assessments, (3) the ability of teachers to formulate learning designs and assessments according to the characteristics of participants' needs Education is still lacking, and (4) teachers still experience obstacles in the realization of the Pancasila Student Profile through learning. The training participants were 30 people who were teachers of chemistry subjects who were members of the Chemistry MGMP group of SMA Kota Palu. This Community Service activity aims to provide an understanding of the principles and application of differentiated learning which includes differentiation of content, processes, and products in chemistry subject matter at the high school level or the same level as the MERRDEKA flow. Activities that have been carried out in the form of workshops, training, and mentoring are carried out with a participatory model. The resulting output targets are scientific publications, differentiated learning guidebooks, and IPR.

Analysis of Nitrogen and Potassium in Liquid Organic Fertilizer from Rice Washing and Mature Coconut Water Bolang, Pinkan K.; Tiwow, Vanny M. A.; Abram, Paulus H.; Nurmayanti, Yuli
Jurnal Akademika Kimia Vol. 14 No. 2 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i2.pp64-69

Mature coconut and rice washing water contain nitrogen and potassium, which are helpful for plants. This study aims to determine the levels of nitrogen and potassium in liquid organic fertilizer from a mixture of mature coconut water and rice washing water. Nitrogen content was analyzed using the Kjeldahl method. Potassium levels were analyzed using a flame photometer. The results indicated that the best nitrogen and potassium levels were obtained in liquid organic fertilizer with a mixture ratio 50:50, namely N 1.26% and K 1.27%. The highest nitrogen content was obtained in liquid organic fertilizer (LOF) with a mixture ratio of 25:75, 1.40%, and the highest potassium content was obtained in liquid organic fertilizer with a mixture ratio of 50:50, 1.27%. When mixed, the increase in nitrogen and potassium levels was caused by the bacteria in the liquid organic fertilizer, which breaks down protein during digestion.

Analysis of Calcium (Ca) and Potassium (K) Contents in Tin Fruits (Ficus carica Linn) Hamzah, Abdul; Aminah, Sitti; Said, Irwan; Nurmayanti, Yuli
Jurnal Akademika Kimia Vol. 12 No. 1 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i1.pp52-57

Tin Fruits (Ficus carica Linn) are typical Middle Eastern plants that have been cultivated in Indonesia. Tin fruits are rich in minerals, especially calcium and potassium. In addition, they also contain benzaldehyde which is beneficial against cancer cells. This study aimed to determine the concentrations of calcium and potassium contained in tin fruits. Determination of calcium and potassium contents using an atomic absorption spectrophotometer (AAS). The results showed an analysis of the water content of the sample obtained was 89.065 %, ash content was 1.0165 % and biomass content was 9.9185 %. While the analysis of calcium contents at a wavelength of 422.7 nm and potassium at a wavelength of 766.5 nm respectively obtained that an average yield of calcium was 354.97 mg/100g and 752.68 mg/100g for potassium. The results of this study are expected to be able to attract the interest of the community to cultivate tin fruits, especially in Central Sulawesi.

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