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ANALISA PENGUJIAN KADAR NITRAT, NITRIT DAN KLORIDA PADA AIR MINERAL DENGAN METODE SPEKTROFOTOMETRI UV – VIS DAN TITRIMETRI
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Udara merupakan kebutuhan esensial bagi kehidupan manusia, Kualitas air minum menjadi perhatian utama dalam upaya menjaga kesehatan masyarakat. Keberadaan senyawa nitrat (NO₃⁻), nitrit (NO₂⁻), dan klorida (Cl⁻) dalam air mineral perlu dikaji mengingat potensi toksisitasnya apabila melebihi ambang batas yang ditetapkan oleh standar nasional. Penelitian ini bertujuan untuk menentukan kadar nitrat, nitrit, dan klorida dalam beberapa sampel air mineral menggunakan metode spektrofotometri UV–Vis dan...
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KONTRIBUSI AIR LIMBAH PENGOLAHAN SAGU TERHADAP KUALITAS AIR SUNGAI
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Ekstraksi pati sagu membutuhkan air dalam jumlah yang banyak sehingga dalam proses pengolahannya dihasilkan air limbah sagu dan ampas sagu yang sangat banyak. Studi ini dilakukan untuk mengetahui kontribusi bahan pencemar dari air limbah sagu yang masuk ke sungai sehingga mempengaruhi kualitas air sungai. Air limbah pengolahan sagu yang digunakan adalah air buangan pertama yang diambil langsung dari saluran pembuangan (T1), air buangan terakhir yang diambil dekat dengan pembuangan ke...
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SINTESIS DAN KARAKTERISASI FOTOKATALIS NANO TIO2-MEMBRAN POLIURETAN BERBASIS MINYAK ALPUKAT, HDI, DAN POLYETHYLENE GLYCOL (PEG) PADA FOTODEGRADASI METIL JINGGA
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Synthetic dyes such as methyl orange are classified as persistent pollutants that are difficult to degrade biologically, thus requiring effective and sustainable treatment technologies. This study develops a photocatalytic membrane based on polyurethane (PU) synthesized from avocado seed oil, hexamethylene diisocyanate (HDI), and polyethylene glycol (PEG) for immobilizing TiO₂ nanoparticles. PEG was used as a dispersing additive to prevent TiO₂ agglomeration and enhance the membrane's hydrophili...
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PROSES PEMUCATAN CRUDE PALM OIL DENGAN RECOVERY REACTIVATED SPENT BLEACHING EARTH (RSBE)
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Spent Bleaching Earth (SBE) merupakan limbah besar dari industri minyak kelapa sawit yang terbentuk selama proses pemurnian di refinery plant dan dipisahkan melalui proses filtrasi di niagara filter. SBE masih mengandung minyak sebanyak 20-40%, yang dapat dimanfaatkan kembali. Penelitian ini bertujuan untuk mengetahui pengaruh aktivasi SBE, kualitas asam lemak bebas, bilangan peroksida dan warna pada Crude Palm Oil yang telah dilakukan bleaching menggunakan karbon aktif RSBE. SBE direndam denga...
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SYNERGISTIC INTERFACIAL CHEMISTRY OF HUMIC ACID AND ACTIVATED FLY ASH FOR HIGH-PERFORMANCE Mn²⁺ ADSORPTION
Susparini, Ninik Triayu
; Ramadhan, Alamsyah Sultan
; Aferta, Lusi
; Benu, Marlon Jusak Renaldy
; Wijayanti, Sri
; Tantowi, Ali
Jurnal Inovasi Teknik Kimia
Vol 11
, No 1
(2025)
This study developed a hybrid adsorbent derived from activated fly ash (FA) and humic acid (HA) for effective Mn²⁺ removal from aqueous solutions. Fly ash was activated using 1 M NaOH to increase its surface hydroxyl groups (≡Si–OH and ≡Al–OH) and enhance reactivity. The activated FA was then composited with HA, which contains abundant –COOH and –OH groups, forming an inorganic–organic hybrid with improved adsorption capability. The HA–FA composite with a 1:3 mass ratio exhibited the highest Mn²...
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Unveiling the Link Between Numeracy Skills and Self-Efficacy: A Study on Physics Learning Through AKM Assessments
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
This study explores the relationship between numeracy skills and self-efficacy among grade 10 students within the context of the Minimum Competency Assessment (AKM) in physics, focusing on linear and parabolic motion. Employing a quantitative descriptive design, the research involved 140 students from a public high school in Bekasi, Indonesia. Instruments included a numeracy test comprising 17 AKM-based physics questions and a self-efficacy questionnaire adapted from Bandura's framework, coverin...
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ANALISIS KESALAHAN NUMERASI SISWA SMA DALAM MENYELESAIKAN SOAL MATEMATIKA BERBASIS AKM BERDASAKAN METODE NEWMAN
JIPMat (Jurnal Ilmiah Pendidikan Matematika)
Vol 10
, No 2
(2025)
Tujuan penelitian ini adalah untuk memeriksa kesalahan numerasi siswa SMA dalam soal matematika berbasis Asesmen Kompetensi Minimum (AKM) dengan menggunakan metode Newman. Metode ini mengidentifikasi kesalahan siswa dalam lima langkah: membaca, memahami, transformasi, keterampilan proses, dan penulisan jawaban. Siswa di kelas XII SMA Negeri 1 Kajen, yang dipilih berdasarkan hasil tes numerasi AKM, adalah subjek penelitian. Hasil penelitian menunjukkan bahwa kesalahan terbesar terjadi pada tahap...
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Development of E-Worksheets Discovery Learning Model Assisted by Augmented Reality for Renewable Energy Topic
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
The poor motivation and interest of students in learning physics which is frequently viewed as challenging and less interesting led to the conduct of this study. As a result, creating cutting-edge educational materials that may facilitate interactive learning and foster a deeper conceptual grasp is essential. Building an Electronic Student Worksheet on the subject of renewable energy using the Discovery Learning methodology enhanced by Augmented Reality is the aim of this study. The research and...
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Development of Augmented Reality (AR) Physics Learning Media Based on STEM-R for Students’ Concept Understanding
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
Learning media that can overcome students' difficulties in understanding abstract concepts through the integration of modern technology with character values is challenging. This study aims to develop, determine the feasibility, student response, and effectiveness of STEM-R-based AR media on concept understanding in heat temperature material. This research uses Research and Development (R&D) with the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). Data collection...
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Problem Based Learning Effect Using the TaRL Approach on Problem-Solving Skills in Global Warming Topic
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
Physics learning is often considered difficult because students are unable to relate concepts to real-world problems they encounter. This condition results in low problem-solving skills among students, especially on contextual topics such as global warming. This study aims to determine the effect of the Problem Based Learning (PBL) model with the Teaching at the Right Level (TaRL) approach on students' problem-solving skills in global warming material. The research method used was quantitative w...
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