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All Journal Edu Sains: Jurnal Pendidikan Sains dan Matematika Indonesian Journal of Science and Education Indonesian Journal of Education and Learning Walisongo Journal of Chemistry JURNAL PENDIDIKAN MIPA Indonesian Journal of Natural Science Education JIPB (Jurnal Inovasi Pembelajaran Biologi) Jurnal Abdimas Bina Bangsa Jurnal Pengabdian KOLABORATIF Indonesian Journal of Education and Learning Indonesian Journal of Science and Education
Rina Rahayu
Universitas Tidar
Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Poly Aluminum Chloride (PAC) as Coagulant in Liquid Waste Treatment of Tofu Riva Ismawati; Rina Rahayu; Rizqa Puspitarini; Ahmad Muhlisin; Alene Tawang
Walisongo Journal of Chemistry Vol 5, No 1 (2022): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v5i1.9417

Abstract

The tofu craftsmen have not processed the liquid waste produced and disposed of the liquid waste directly into the waters as a result, the water quality has decreased. Tofu liquid waste has BOD (Biological Oxygen Demand), COD (Chemical Oxygen Demand), and TSS (Total Suspended Solid) exceeding the permitted quality standards. Treatment of tofu liquid waste needs to be done before being disposed of, one of which is by using coagulant. The purpose of this research is to know the value of BOD, COD, TSS, and pH of tofu liquid waste before and after the addition of PAC. The study was conducted by varying the concentration of PAC (10 mg/L, 30 mg/L, and 75 mg/L). The test results show that the tofu liquid waste has a BOD value of 3,890 mg/L, COD 9558.7 mg/L, TSS 2,905 mg/L, and a pH of 3.7. The use of PAC as a coagulant reduced the values of BOD, COD, TSS, and pH. PAC concentration of 75 mg/L can reduce BOD, COD, TSS, and pH values to 3,015 mg/L, 6,900 mg/L, 840 mg/L, and 3.59, respectively.
Efektifitas Online Project Based Learning Berbasis Ethnosains Pada Pembelajaran IPA terhadap Keterampilan Proses Sains Mahasiswa Selama Pandemi Rina Rahayu; Riva Ismawati
JURNAL PENDIDIKAN MIPA Vol 12 No 4 (2022): JURNAL PENDIDIKAN MIPA
Publisher : Pusat Publikasi Ilmiah, STKIP Taman Siswa Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37630/jpm.v12i4.738

Abstract

Pendidikan merupakan poin penting yang menjadi perhatian khusus selama masa pandemi Covid-19. Terlebih lagi pendidikan menjadi bagian yang sangat penting dalam membangun generasi penerus bangsa yang mampu menciptakan sumber daya manusia yang unggul dan mampu bersaing secara global. Pembelajaran yang dilakukan secara daring sebaiknya lebih memperhatikan kondisi yang ada disekitar mahasiswa. Model pembelajaran berbasis proyek dilakukan dengan menerapkan kegiatan dalam pembelajaran. Tujuan dari penelitian ini yaitu untuk mengetahui efektifitas online project based learning berbasis etnosains pada pembelajaran IPA terhadap keterampilan proses mahasiswa selama pandemi. Penelitian yang dilakukan menggunakan penelitian quasi experimental dengan desain penelitian one group pretest posttest. Populasi penelitian yaitu mahasiswa Pendidikan IPA. Pengambilan sampel dilakukan dengan metode acak. Instrumen penelitian berupa lembar soal keterampilan proses sains. Teknik pengumpulan data dilakukan melalui tes. Hasil penelitian menunjukkan bahwa pada hasil pretest nilai tertinngi yaitu 83 dan nilai terendah yaitu 50. Pada hasil posttest nilai tertinggi yaitu 95 dan nilai terendah adalah 67. Hasil nilai rata-rata nilai pretest yaitu 74, sedangkan nilai rata-rata posttest yaitu 88. Pada hasil uji N-gain menunjukkan rata-rata sebesar 0,518 yang masuk dalam kategori sedang. Berdasarkan pada hasil penelitian menyatakan bahwa pembelajaran berbasis proyek (PjBL) cukup efektif dalam meningkat keterampilan proses sains mahasiswa Prodi Pendidikan IPA.
PENGEMBANGAN DESAIN PEMBELAJARAN IPA UNTUK MENINGKATKAN KARAKTER PELAJAR PANCASILA PADA ASPEK BERNALAR KRITIS DAN KREATIF DI SMPIT IHSANUL FIKRI KOTA MAGELANG ahmad muhlisin; jiantika Rahmawati; Rina Rahayu
Jurnal Inovasi Pembelajaran Biologi Vol 3 No 2 (2022)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jipb.v3n2.p88-109

Abstract

Penerapan nilai dalam kegiatan pembelajaran merupakan salah satu upaya penguatan karakter siswa. Upaya tersebut linier dengan komitmen Kemendikbud dalam mewujudkan Pelajar Pancasila. Pelajar Pancasila merupakan perwujudan pelajar Indonesia yang berkarakter baik dengan kompetensi yang dapat bersaing secara global dan mencerminkan nilai luhur Pancasila di setiap perilakunya. Hasil studi pendahuluan pada kegiatan pembelajaran IPA di SMPIT Ihsanul Fikri Kota Magelang menunjukkan rendahnya karakter Pelajar Pancasila pada aspek bernalar kritis dan kreatif siswa. Perlu adanya alternatif desain pembelajaran yang mampu mengakomodasi karakter Pelajar Pancasila pada aspek keterampilan bernalar kritis dan kreatif siswa. Penelitian ini merupakan penelitian pengembangan dengan model Learning Development Cycle (LDC). Siklus model penelitian ini meliputi tahap scope, creation, user experience, meta evaluation, dan evaluation. Penelitian ini bertujuan untuk mendeskripsikan produk hasil pengembangan berupa desain pembelajaran IPA dalam meningkatkan karakter Pelajar Pancasila pada aspek bernalar kritis dan kreatif. Deskripsi produk ditinjau berdasarkan data yang diperoleh yaitu hasil validasi produk yang diberikan oleh para ahli dengan kriteria valid apabila mencapai kategori valid-sangat valid, data hasil keefektifan ditinjau dari ketercapaian indikator bernalar kritis dan kreatif melalui pretest dan posttest dengan kriteria efektif jika mencapai kategori sedang-tinggi, dan kepraktisan ditinjau berdasarkan penilaian keterlaksanaan oleh observer dengan kriteria praktis jika mencapai kategori praktis-sangat praktis. Hasil penelitian ini menunjukkan bahwa desain instruksional pembelajaran yang dikembangkan dinyatakan valid dengan perolehan nilai validasi isi sebesar 4,00 dan validasi konstruk sebesar 4,18, dinyatakan efektif pada kategori sedang dengan perolehan skor N-Gain sebesar 0,40, dan dinyatakan sangat praktis berdasarkan penilaian keterlaksanaan aktivitas guru dengan persentase 88,12% dan aktivitas siswa dengan persentase sebesar 84,93%.
Game Sains Pemanfaatan Barang Bekas menjadi Alat Sederhana IPA sebagai Media Belajar Siswa SMP selama Pandemi Rina Rahayu; Riva Ismawati
Jurnal Pengabdian KOLABORATIF Vol 1, No 1 (2023): January
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jpk.v1i1.5941

Abstract

Many used goods that are not utilized can contribute to the production of more and more waste. Students at partner schools are not used to using used materials for science learning media. This causes students to be unable to apply theory in science in everyday life which makes students' scientific literacy in partner schools still lacking. The difficulties of students in partner schools in learning science are possible because students do not know scientific phenomena that occur in everyday life and students are not introduced to science practices. Through the management of used goods into simple science tools, it is hoped that they can be used as learning media for students in partner schools. The method used in this activity is lecture, discussion, and practice. This activity was carried out for 3 meetings at each partner. These activities included delivering materials and making simple science teaching aids using used materials. Making simple science tools from used goods makes students learn about science. It also teaches students to take advantage of used goods in the surrounding environment, so that indirectly they can also maintain the environmental sustainability. The obstacle found in this activity was the limited time needed to make science teaching aids.
PENGEMBANGAN BAHAN AJAR IPA BERBASIS AKTIVITAS ARGUMENTASI ILMIAH PADA TOPIK KLASIFIKASI MAKHLUK HIDUP Siswanto Siswanto; Yolanda Darnaningrum; Rina Rahayu; Nuryunita Dewantari
Indonesian Journal of Education and Learning Vol. 7 No. 2 (2024): April
Publisher : Universitas Tidar

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

Abstract

Topik klasifikasi makhluk hidup yang diajarkan pada peserta didik pada tingkat menegah tergolong dalam topik yang sulit dan mengakibatkan masih terdapatnya miskonsepsi. Miskonsepsi yang terjadi dapat diatasi melalui argumentasi ilmiah dalam pembelajaran. Namun kemampuan argumentasi ilmiah yang dimiliki oleh peserta didik di indonesia masih tergolong rendah. Salah satu cara dalam melatihkan argumentasi ialah melalui buku teks. Namun, buku teks yang digunakan di indonesia masih berada pada level 2 pada tingkatan argumentasi ilmiah. Analisis data pada penelitian ini dilakukan dengan metode fuzzy delphi dan grafik fry. Penelitian terdiri atas 4 tahapan yaitu 1) menganalisis indikator kognitif pada topik klasifikasi makhluk hidup. 2) pengembangan bahan ajar. 3) menganalisis keterbacaan pada bahan ajar. 4) menganalisis validitas pada bahan ajar. Hasil penelitian diperoleh bahwa 1) terdapat 7 indikator kognitif yang perlu dilatihkan pada topik klasifikasi makhluk hidup. 2) hasil uji keterbacaan menunjukan bahwa bahan ajar telah sesuai bagi tingkatan pembaca pada kelas 7. 3) hasil validitas memperoleh kesepakatan bersama para ahli pada setiap sub bab atau valid.
Pemberdayaan Siswa dalam Pengolahan Sampah Organik menjadi Pupuk Kompos untuk Menanamkan Literasi Lingkungan Riva Ismawati; Rina Rahayu
Jurnal Pengabdian KOLABORATIF Vol. 2 No. 1 (2024): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jpk.v2i1.7442

Abstract

Education needs to play a role in overcoming environmental problems by forming environmentally literate individuals. Environmentally literate individuals are individuals who are responsible for their behavior, respect the environment, and understand the problems that occur in the environment. Therefore, environmental literacy needs to be instilled and trained from an early age. It is known that students are not aware of various environmental problems, and efforts to preserve the environment, environmental education has not been integrated into classroom learning, and the absence of waste management practices in schools makes students' environmental literacy low. The methods used in PKM include (a) case studies and discussions, and (b) the practice of making compost and using it to fertilize plants. PKM activities begin with contracts and at the end of the activity, an evaluation is carried out to find out the achievements of PKM implementation. PKM activities were carried out in two partner schools namely SD Muhammadiyah 2 Alternative and SD Negeri Keramat 5 Magelang. Participants who are students from the two partner schools have understood environmental issues, and waste management as an effort to preserve the environment, and are skilled in processing organic waste into compost. Participants showed interest and enthusiasm during the PKM activities.
Potential Utilization of Lamtoro Leaves (Leucaena leucocephala) as Natural Coagulants Riva Ismawati; Rina Rahayu; Rizqa Puspitarini
Indonesian Journal of Science and Education Vol. 7 No. 1 (2023): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v7i1.566

Abstract

Water is a vital element for human beings. However, there are still limited clean water services in Indonesia. Raw water treatment is needed to ensure the availability of clean water. One of the methods is by using the coagulation process. The coagulant functions to speed up the coagulation process. Although effective in water treatment, chemical coagulants have some disadvantages. Therefore, it is necessary to develop natural coagulants to overcome the weakness of chemical ones. Natural ingredients can be used as coagulants if they have many macromolecules. Lamtoro leaves are one of the natural materials that are only used to feed the animal. This research aims to examine the potential of lamtoro leaf as a natural coagulant in terms of its content. The research is conducted by testing lamtoro leaf powder using Fourier Transform Infrared Spectroscopy and proximate test. Infrared spectra of lamtoro leaves show the presence of absorption peaks for specific groups of carbohydrate and protein compounds. The proximate test results show that lamtoro leaves contain 24.7% protein and 53.71% carbohydrates. The high protein and carbohydrate contents in lamtoro leaves enable them to be used as a natural coagulant.
Co-Authors Ahmad Muhlisin Ahmad Muhlisin Alene Tawang Diah Rosita Dewi Eli Trisnowati Fadhilah Rahmawati Fifit Firmadani Hapsari Catur Mahardika Heny Sholikhatul Awwaliyah jiantika Rahmawati Novi Purnamasari Nuryunita Dewantari Pamungkas, Megita Dwi Riva Ismawati Rizqa Puspitarini Rizqa Puspitarini rudi susilo Singgih, Suwito Siswanto Siswanto Tutik Arifah Wartini Wartini Yolanda Darnaningrum