Jurnal CrystalPub Date : 2023-09-30DOI: 10.36526/jc.v5i2.3101
Eko Malis, Rosyid Ridho, Qurrata Ayun, Reny Eka Evi Susanti
{"title":"SUPERKAPASITOR STUDI PERBANDINGAN SIFAT ELEKTRODA SUPERKAPASITOR DARI ARANG AKTIF TEMPURUNG KELAPA BANYUWANGI DENGAN ACTIVATOR ASAM DAN BASA","authors":"Eko Malis, Rosyid Ridho, Qurrata Ayun, Reny Eka Evi Susanti","doi":"10.36526/jc.v5i2.3101","DOIUrl":"https://doi.org/10.36526/jc.v5i2.3101","url":null,"abstract":"Telah dilakukan penelitian preparasi elektroda superkapasitor arang aktif dari tempurung kelapa. pembuatan arang aktif dari tempurung kelapa yang berasal dari pesisir pantai Banyuwangi. Arang aktif ditreatment surface area melalui beberapa Langkah yaitu karbonasi dan aktivasi. Karbonasi dilakukan dengan cara pirolisis yaitu memanaskan tempurung kelapa pada suhu 750oC pada kondisis aerob. Aktivasi dilakukan dengan membandingkan 2 activator kimia diantaranya asam klorida dan Kalium Hidroksida Dengan konsentrasi masing-masing 5 mol/L.
 Pada penelitian ini difokuskan pada pemanfaatan tempurung kelapa sebagai elektroda superkapasitor. Karbon aktof Dari tempurung kelapa dipilih disebabkan sebaran distribusi kapasitansi dan luas area terbaik. Superkapasitor merupakan penyimpan energi yang lebih efisien dibandingkan dengan baterai. Elektroda dibuat dengan Luas 1,5 cm x 1,5 mm. Karakterisasi Permukaan karbon aktif menggunakan titrasi iodometri, karakterisasi elektroda menggunakan metode voltametri. Kapasitansi kapasitor maksimum diperoleh 15,59 F/g/S, Morfologi SEM menunjukkan ukuran pori sebesar 8,457 , iod number optimal sebesar 2376,74.","PeriodicalId":477343,"journal":{"name":"Jurnal Crystal","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135085898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"KOMPONEN FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN RUMPUT LAUT EUCHEUMA COTTONII DI PERAIRAN DESA PAJUKUKANG BANTAENG","authors":"None Saadatul Husna, Nurlaida Nurlaida, Yusriadi Yusriadi, Hermin Utami, Najmah Najmah","doi":"10.36526/jc.v5i2.2769","DOIUrl":"https://doi.org/10.36526/jc.v5i2.2769","url":null,"abstract":"Red seaweed (Eucheuma cottoni) is a plant that has high cultivation potential and is growing rapidly. Bantaeng Regency is one of the 15 seaweed processing centers in Indonesia. The use of seaweed is very diverse, both for food, feed, fertilizer, cosmetics and pharmaceuticals. This is related to the content of nutrients, minerals and bioactive compounds contained in seaweed. This research aims to determine the water content, ash content, phytochemical compound and antioxidant activity of red seaweed in the waters of Pajukukang Village Bantaeng. The research result showed that water content and ash content of red seaweed were 7.21%,17.626% respectively. Red seaweed ethanol extract contains alkaloids, flavonoids, saponins, and steroids. The result of antioxidant test showed that the red seaweed ethanol extract has weak antioxidant activity with IC50 value of 961,83 ppm.","PeriodicalId":477343,"journal":{"name":"Jurnal Crystal","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135085780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jurnal CrystalPub Date : 2023-09-30DOI: 10.36526/jc.v5i2.3076
Jola Latupeirissa, Nikmans Hattu, Semuel S. Pada, Vonny W. Soplanit
{"title":"ANALYSIS OF ACID MIXTURE COMPARISON ON THE PROCESS OF DESTRUCTION OF LEAD METAL (Pb) ON SAMPLE OF CARPET SHELL’S MEAT (Ruditapes variegatus)","authors":"Jola Latupeirissa, Nikmans Hattu, Semuel S. Pada, Vonny W. Soplanit","doi":"10.36526/jc.v5i2.3076","DOIUrl":"https://doi.org/10.36526/jc.v5i2.3076","url":null,"abstract":"ABSTRACT
 
 Analysis of the acid mixture ratio in the lead (Pb) metal deconstruction process in carpet shell’s meat samples (Ruditapes variegatus). In the deconstruction agent HNO3 : HCl (1:3), the average lead metal concentration contained in sweet clam meat is 4.6305 ± 1.066 mg/kg and for the HNO3 : H2SO4 (3:1), the average lead metal concentration contained in the same sweet clam meat was 5.6516 ± 2.556 mg/kg. Statistical test results showed no significant difference in the dissolving power of the acid mixture HNO3 : HCl (1:3) and HNO3 acid mixture: H2SO4 (3:1) as seen from the p>0.005 value, so both the HNO3 acid mixture: HCl (1:3) and HNO3 acid mixture: H2SO4 (3:1) can be used to deconstruct Pb metal in sweet clam meat (Ruditapes variegatus) because there is no significant difference in the two acid mixtures.","PeriodicalId":477343,"journal":{"name":"Jurnal Crystal","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135085784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jurnal CrystalPub Date : 2023-09-30DOI: 10.36526/jc.v5i2.3075
Semuel Simra, Tarso Rudiana
{"title":"DEVELOPMENT OF CACAO VARIETY IDENTIFICATION METHOD USING COMBINATION OF FTIR SPEKTROSCOPY AND MULTIVARIATE ANALYSIS","authors":"Semuel Simra, Tarso Rudiana","doi":"10.36526/jc.v5i2.3075","DOIUrl":"https://doi.org/10.36526/jc.v5i2.3075","url":null,"abstract":"Abstract
 Indonesia is the third largest cocoa producing country after Ivory Coast and Ghana. Indonesian cocoa agribusiness still faces obstacles, among others, the low quality of cocoa beans caused by different types of cocoa plant varieties. The amount of phenolic compounds in cocoa depends on the variety. There are 3 variety of cocoa plants, namely Criollo (fine flavoured cocoa) Forestero (bulk cocoa) and Trinitario (Criollo and Forestero hybrids). This study aims to identify cocoa varieties quickly and efficiently to control the quality of cocoa bean production. The method used in this study is a combination of Fourier Transform Infrared (FTIR) Spectroscopy Method and Multivariate Analysis Method. The combination of these two methods has been widely developed for the identification and authentication of types of plants that have similar or close ties. Based on the results of FTIR (Fourier Transform Infrared) analysis at a wave number of 4000-400 cm-1 to 15 samples of cocoa beans, a spectrum that is multicomponent and relatively the same is obtained. The spectrum data is processed by the multivariate analysis method, Principle Component Analysis (PCA) and obtained that the 3 variety of cocoa can be clearly distinguished where the value of the main components (PC-1 and PC-2) is 92.03%.","PeriodicalId":477343,"journal":{"name":"Jurnal Crystal","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jurnal CrystalPub Date : 2023-09-30DOI: 10.36526/jc.v5i2.2732
Ayu Qurota A'yun, Rosyid Ridho
{"title":"PENGARUH PENAMBAHAN REMAZOL YELLOW TERHADAP EFEKTIVITAS FOTOREDUKSI ION Cr(VI) TERKATALISIS TiO2-RESIN","authors":"Ayu Qurota A'yun, Rosyid Ridho","doi":"10.36526/jc.v5i2.2732","DOIUrl":"https://doi.org/10.36526/jc.v5i2.2732","url":null,"abstract":"Pengaruh Remazol Yellow terhadap efektivitas fotoreduksi ion Cr(VI) yang dikatalisis TiO2-Resin telahditeliti. Penelitian ini diawali dengan pembuatan katalisis TiO2-Resin dengan perbandingan 1:1. Hasil preparasi Katalis TiO2-Resin dikarakterisasi menggunakan difraksisinar-X. Kemudian katalisis TiO2-Resin diujikan untuk mereduksi ion Cr (V) dan mendegradasi senyawa Remazol Yellow dalam limbah. Proses fotoreduksi ion Cr(VI) dan fotodegradasi Remazol Yellow dilakukan di dalam suatu sistem reaktor tertutup (sistem batch) yang dilengkapi dengan lampu UV yaitu dengan cara menyinari campuran yang terdiridari ion Cr(VI) dan serbuk fotokatalis TiO2-Resin disertai pengadukan selama waktu tertentu. Dalam penelitian ini dipelajari pengaruh waktu penyinaran, konsentrasi awal ion Cr(VI) dan keberadaan Remazol Yellow terhadap efektivitas fotoreduksi. Hasil penelitian ini menunjukkan bahwa fotokatalis TiO2-Resin dapat meningkatkan hasil fotoreduksi ion Cr(VI) yaitu waktu 48 jam hasil fotoreduksi sebesar 82,83%. Pengaruh konsentrasi awal ion Cr(VI) diperoleh hasil fotoreduksi ion Cr(VI) yaitu 5 ppm sebesar 89,54%. Adanya penambahan Remazol Yellow mempengaruhi efektivitas fotoreduksi ion Cr(VI) sebesar 76,44% pada konsentrasi 5 ppm ion Cr(VI). Hasil Fotodegradasi Remazol Yellow hasilterbesar juga terdapat pada konsentrasi ion Cr(VI) 5 ppm sebesar 29,28%. Ketersediaanradikal •OH yang diperlukan untuk mengoksidasi Remazol Yellow dalam jumlah yang tetap dan relative banyakmembuatfotodegradasi Remazol Yellow meningkat. Hasil pengaruhvariasi Remazol Yellow terhadap efektivitas fotoreduksi ion Cr(VI) sebesar 78,46% pada konsentrasi Remazol Yellow 10 ppm. Adanya penambahan Remazol Yellow dapat meningkatkan reduksi ion Cr(VI) dan sebaliknya, hal ini dikarenakan keberadaan Remazol Yellow dapat mencegah penggabungan kembali •OH dan elektron.","PeriodicalId":477343,"journal":{"name":"Jurnal Crystal","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135086000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jurnal CrystalPub Date : 2023-09-30DOI: 10.36526/jc.v5i2.3086
Kostiawan Sukamto
{"title":"RECOVERY TEMBAGA DARI LARUTAN TEMBAGA SULFAT MELALUI METODE SEMENTASI MENGGUNAKAN BESI","authors":"Kostiawan Sukamto","doi":"10.36526/jc.v5i2.3086","DOIUrl":"https://doi.org/10.36526/jc.v5i2.3086","url":null,"abstract":"This study aims to optimize the copper recovery process from copper sulfate solution using the cementation method with iron as the precipitating agent. This method offers an efficient and sustainable solution to address the challenges of copper recovery from copper sulfate solutions, which has become increasingly crucial due to the declining supply of high-grade copper ore. The variables optimized in this research encompass the optimization of stirring speed (50 RPM to 300 RPM), iron addition (0.5 to 3 times the stoichiometric reaction), temperature (30 to 70°C), and reaction time (15 to 120 minutes). The research results indicate that the optimal conditions for copper recovery are achieved at a stirring speed of 200 RPM, iron addition of 2 times the stoichiometric reaction, a temperature of 70°C, and a reaction time of 120 minutes. Under these conditions, the percentage of copper recovery from the copper sulfate solution using the cementation method reaches 99.37%, demonstrating a high level of efficiency in this approach.","PeriodicalId":477343,"journal":{"name":"Jurnal Crystal","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}