Air limbah sisa deterjen yang berasal dari pencucian pakaian (laundry) berpotensi mencemari kelestarian lingkungan seperti sungai dan tanah jika dibuang dalam volume yang besar tanpa ada pengolahan terlebih dahulu. Metode pengolahan air limbah laundry yang mudah dan murah untuk skala rumah tangga telah dilakukan dan terbukti dapat menurunkan kadar polutan-polutan yang terkandung dalam air limbah laundry seperti fosfat dan amonia. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan media filtrasi menggunakan kombinasi adsorben arang aktif, zeolit, pasir silika, antrasit dan ferolit dalam menurunkan kadar fosfat dan amonia dalam air limbah laundry. Berdasarkan hasil uji laboratorium terhadap parameter uji fosfat dan amonia didapatkan hasil bahwa setelah proses filtrasi, terjadi penurunan kadar fosfat dan amonia dalam sampel air limbah laundry masing-masing sebesar 83,3% dan 63,6%. Dengan demikian, dari data hasil penelitian dapat disimpulkan bahwa media filtrasi berupa kombinasi adsorben yang digunakan dalam penelitian ini terbukti dapat menurunkan kadar fosfat dan amonia pada sampel air limbah laundry.

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PEMANFAATAN KARBON AKTIF DARI BAMBU SEBAGAI ELEKTRODA SUPERKAPASITOR ABSTRAKPada penelitian ini, karbon aktif berbasis bambu telah digunakan untuk pembuatan superkapasitor. Uji daya jerap iodin dilakukan untuk mengukur tingkat serapan pori sampel karbon aktif yang ukurannya relatif kecil (mikropori). Karakteristik bahan karbon aktif yang meliputi struktur kristal dan morfologi permukaannya diuji dengan menggunakan SEM dan XRD. Bahan elektroda dengan komposisi (Karbon aktif : PVDF = 9:1 (b/b)), kolektor arus dan separator telah dirangkai untuk diuji kinerjanya sebagai perangkat penyimpanan muatan listrik. Metode siklik voltametri digunakan untuk melihat kinerja perangkat superkapasitor dengan mengukur nilai kapasitansi spesifik berdasarkan kurva voltammogram. Berdasarkan hasil perhitungan nilai kapasitansi spesifik diperoleh nilai kapasitansi spesifik tertinggi pada superkapasitor dengan elektroda bambu yang diaktivasi dengan steam 50 mL/bar yaitu sebesar  59.50 F.Kata kunci: Karbon aktif bambu, siklik voltametri, kapasitansi spesifik, superkapasitor.  UTILIZATION OF BAMBOO BASED ACTIVATED CARBON AS SUPERCAPACITOR ELECTRODE ABSTRACT In this study, bamboo based activated carbon has been used for fabrication of supercapacitors. Iodine absorption test is performed to measured absorption level porous activated carbon sample size is relatively small (microporous). Characteristics of the activated carbon material covering the surface morphology and structure were tested using SEM and XRD. Electrode materials with composition (Activated charcoal: PVDF = 9: 1 (w / w)), the current collector and separator has been assembled to be tested its performance as an electrical charge storage device. The test results by cyclic voltammetry method was to look at the performance supercapacitor devices at once to obtain the value of the capacitance curve obtained voltammograms. Based on the results of the calculation of the capacitance, the highest capacitance values obtained in the supercapacitor with activated carbon electrodes in bamboo steam 50 mL / bar with a capacitance value is 59.50 F / g.Keywords: Bamboo activated carbon, cyclic voltammetry, the specific capacitance, supercapacitor.

Pada penelitian ini, karbon aktif berbasis sabut kelapa telah digunakan untuk pembuatan superkapasitor. Uji daya jerap iodin dilakukan untuk mengukur tingkat serapan pori sampel karbon aktif yang ukurannya relatif kecil  (mikropori). Karakteristik bahan karbon aktif yang meliputi struktur kristal dan morfologi permukaannya diuji dengan menggunakan SEM dan XRD. Bahan elektroda dengan komposisi (Karbon aktif : PVDF = 9:1 (b/b)), kolektor arus dan separator telah dirangkai untuk diuji kinerjanya sebagai perangkat penyimpanan muatan listrik. Metode siklik voltametri digunakan untuk melihat kinerja perangkat superkapasitor dengan mengukur nilai kapasitansi spesifik berdasarkan kurva voltammogram. Berdasarkan hasil perhitungan nilai kapasitansi spesifik diperoleh nilai kapasitansi spesifik tertinggi pada superkapasitor dengan elektroda sabut kelapa yang diaktivasi dengan steam 50 mL/bar yaitu sebesar  50.73 F/g.

Research on physics learning on magnetic field has been carried with the PIMCA Learning Model (Presentation, Idea Mapping, Conceptualization, Formative Assessment introduced by Cosmas Poluakan). The research objective was to develop a PIMCA learning model based on Multiple Representation-Semiotic Resources. This research and development with reference to the 10 steps of developing the Dick and Carey model. This research was conducted in the Physics Education department of Manado State University, with 30 student teachers candidate as respondents. The research procedure starts from the development step by doing the validity of the expert test and then doing trials in small groups and large groups with pre-test and post-test. The results showed that the validity of the expert test got an average value of 3. 28 so that the learning model was in the very good category and was worthy to be disseminated. In the small group trial results, the pre-test mean score was 0.2 and the post-test mean score was 2.2. Whereas for the large group the results of the pre-test and post-test trials were 0.7 and 2.5. In the student response, 46.6% chose very good, 40% chose were good, and 13.4% chose were quite good. The results of this research indicate that the PIMCA learning model is suitable for use as a learning model that can help students understand the concept of magnetic fields. 6% chose very good, 40% chose were good, and 13.4% chose were quite good. The results of this research indicate that the PIMCA learning model is suitable for use as a learning model that can help students understand the concept of magnetic fields. 6% chose very good, 40% chose were good, and 13.4% chose were quite good. The results of this research indicate that the PIMCA learning model is suitable for use as a learning model that can help students understand the concept of magnetic fields.