Pub Date : 2024-06-10DOI: 10.51544/kimia.v8i1.4950
Maria Peratenta Sembiring, Rozanna Sri Irianty, Zulfansyah, Chairul
Proses pembakaran batu bara menghasilkan emisi berupa gas SO2, NO2, CO, CO2, volatile hydrocarbon (VHC), suspended particulate matter (SPM), serta residu padat berupa abu boiler. Abu boiler mengandung berbagai logam berat beracun, diantaranya tembaga (Cu), kobalt (Co), kromium (Cr), cadmium (Cd) dan timbal (Pb). Penelitian ini bertujuan untuk menentukan efisiensi reduksi logam berat Cu, Co, Cr, Pb, dan total dengan melakukan ekstraksi menggunakan pelarut kimia NaOH dan mengubah logam transisi menjadi kompleks dengan Ethylene diamine tetraacetic acid (EDTA) pada rasio EDTA: abu boiler sebesar 1:2, 1:1, 2:1; durasi pengadukan sebesar 2 dan 4 jam; serta suhu ekstraksi sebesar 25 dan 60 oC. Analisis Inductively Coupled Plasma (ICP) dilakukan untuk mengetahui penurunan kadar logam berat dari ekstrak abu boiler. Hasil penelitian menunjukkan bahwa kondisi ekstraksi berupa rasio EDTA: abu boiler sebesar 2:1, durasi pengadukan sebesar 4 jam, dan suhu ekstraksi sebesar 60 oC dapat menghasilkan persentase penurunan kadar logam berat total tertinggi yang mencapai 77,2% dengan persentase penurunan kadar Co, Cr, Cu, dan Pb secara berturut-turut sebesar 75,4%, 77,9%, 74,5%, dan 81,9%. Penelitian ini diharapkan dapat menjadi rekomendasi bagi penelitian selanjutnya dalam mengeksplor potensi pemanfaatan abu boiler yaitu sebagai bahan campuran aspal, pembuatan batako, dan sebagainya.
{"title":"UNJUK KERJA NaOH DALAM MEREDUKSI LOGAM BERAT PADA LIMBAH ABU BOILER","authors":"Maria Peratenta Sembiring, Rozanna Sri Irianty, Zulfansyah, Chairul","doi":"10.51544/kimia.v8i1.4950","DOIUrl":"https://doi.org/10.51544/kimia.v8i1.4950","url":null,"abstract":"Proses pembakaran batu bara menghasilkan emisi berupa gas SO2, NO2, CO, CO2, volatile hydrocarbon (VHC), suspended particulate matter (SPM), serta residu padat berupa abu boiler. Abu boiler mengandung berbagai logam berat beracun, diantaranya tembaga (Cu), kobalt (Co), kromium (Cr), cadmium (Cd) dan timbal (Pb). Penelitian ini bertujuan untuk menentukan efisiensi reduksi logam berat Cu, Co, Cr, Pb, dan total dengan melakukan ekstraksi menggunakan pelarut kimia NaOH dan mengubah logam transisi menjadi kompleks dengan Ethylene diamine tetraacetic acid (EDTA) pada rasio EDTA: abu boiler sebesar 1:2, 1:1, 2:1; durasi pengadukan sebesar 2 dan 4 jam; serta suhu ekstraksi sebesar 25 dan 60 oC. Analisis Inductively Coupled Plasma (ICP) dilakukan untuk mengetahui penurunan kadar logam berat dari ekstrak abu boiler. Hasil penelitian menunjukkan bahwa kondisi ekstraksi berupa rasio EDTA: abu boiler sebesar 2:1, durasi pengadukan sebesar 4 jam, dan suhu ekstraksi sebesar 60 oC dapat menghasilkan persentase penurunan kadar logam berat total tertinggi yang mencapai 77,2% dengan persentase penurunan kadar Co, Cr, Cu, dan Pb secara berturut-turut sebesar 75,4%, 77,9%, 74,5%, dan 81,9%. Penelitian ini diharapkan dapat menjadi rekomendasi bagi penelitian selanjutnya dalam mengeksplor potensi pemanfaatan abu boiler yaitu sebagai bahan campuran aspal, pembuatan batako, dan sebagainya.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141366583","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3986
Liver Zai, Estetika Niat Iman Halawa, Malemta Tarigan, Erdiana Gultom, V. Purwandari, Ong Amanda Jiamin
Along with the increase in population, the need for building materials, namely wood, will increase, thus triggering rampant illegal logging, which will cause floods, landslides, and global warming. One of the efforts made to reduce the use of wood is to make gypsum composite boards. This study aims to utilize mahogany wood waste and jati wood powder as gypsum board fillers. Research has been carried out on processing waste sawdust from mahogany and jati wood as a filling material for making gypsum ceilings with polyvinyl alcohol adhesive by mixing and compacting using a hot compressor at 70o C. Good quality with a density value of 0.82 g /cm3 and absorption capacity of 38.4% complied with SNI 03-2105-2006. Mechanical properties with variations in impact strength (95:5:10) of 19.014 J/m2, flexural strength of variation (95:5) of 395, 446 N/m2, and fracture strength of variation (95:5:5) of 1.7758 N/m2. A Gypsum board was obtained, which did not meet SNI 03-6384-2000 on the gypsum board specification for the results of testing for flexural strength and fracture strength.
随着人口的增加，对建筑材料，即木材的需求将会增加，从而引发猖獗的非法采伐，这将导致洪水，山体滑坡和全球变暖。为减少木材的使用所做的努力之一是制作石膏复合板。本研究的目的是利用红木废料和贾提木粉作为石膏板填料。研究了将红木、皂角木废锯末作为聚乙烯醇胶粘剂制作石膏顶棚的填充材料，在70℃高温下进行混合压实处理。质量优良，密度值为0.82 g /cm3，吸收量为38.4%，符合SNI 03-2105-2006标准。力学性能:冲击强度(95:5:10)变化为19.014 J/m2，弯曲强度(95:5)变化为395,446 N/m2，断裂强度(95:5:5)变化为1.7758 N/m2。所制石膏板的抗折强度和断裂强度试验结果不符合石膏板规范SNI 03-6384-2000的要求。
{"title":"PROCESSING OF SAWDOW WASTE OF MAHONI AND JATI WOOD AS A MATERIAL GYPSUM CEILING FILLERS WITH POLIVINYL ADHESIVE ALCOHOL","authors":"Liver Zai, Estetika Niat Iman Halawa, Malemta Tarigan, Erdiana Gultom, V. Purwandari, Ong Amanda Jiamin","doi":"10.51544/kimia.v7i1.3986","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3986","url":null,"abstract":"Along with the increase in population, the need for building materials, namely wood, will increase, thus triggering rampant illegal logging, which will cause floods, landslides, and global warming. One of the efforts made to reduce the use of wood is to make gypsum composite boards. This study aims to utilize mahogany wood waste and jati wood powder as gypsum board fillers. Research has been carried out on processing waste sawdust from mahogany and jati wood as a filling material for making gypsum ceilings with polyvinyl alcohol adhesive by mixing and compacting using a hot compressor at 70o C. Good quality with a density value of 0.82 g /cm3 and absorption capacity of 38.4% complied with SNI 03-2105-2006. Mechanical properties with variations in impact strength (95:5:10) of 19.014 J/m2, flexural strength of variation (95:5) of 395, 446 N/m2, and fracture strength of variation (95:5:5) of 1.7758 N/m2. A Gypsum board was obtained, which did not meet SNI 03-6384-2000 on the gypsum board specification for the results of testing for flexural strength and fracture strength.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133950501","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3906
Nelson Silitonga, Nurliana Tarigan, Gimelliya Saragih, Vivi Purwandari, Ahmad Zukhruf Akbari
Meningkatnya kesadaran tentang polusi telah menyebabkan pengembangan solusi untuk masalah lingkungan dengan memaksimalkan pemanfaatan biomassa yang berlimpah untuk pembuatan nanokarbon. Penelitian ini bertujuan untuk memanfaatkan limbah padat kelapa sawit menjadi material yang memiliki nilai guna dan nilai ekonomis menjadi nanokarbon dan material yang berteknologi tinggi. nanokarbon yang berasal dari pelepah dan cangkang sawit yang dibuat melalui metode hidrotermal dengan 180oC selama 2 jam dengan pelarut air dan dilakukan metode ultrasonikasi selama 15 menit. Nanokarbon yang didapat dikarakterisasi menggunakan Fourier Tranform Infrared (FTIR), X-Ray Difraktometer (XRD), dan Particle Size Analyzer (PSA). Dari hasil analisa gugus fungsi menggunakan FTIR telah menunjukan gugus fungsi nanokarbon dan ditemukan perubahan ukuran partikel yang sangat signifikan dari proses sebelum dan sesudah proses hidrotermal, yaitu 895,2 nm menjadi 334,2 nm. Peningkatan volume pori dan luas permukaan partikel masing-masing sebesar 3,5% dan 63% setelah proses hidrotermal.
{"title":"PEMBUATAN NANOKARBON DARI LIMBAH PADAT KELAPA SAWIT MENGGUNAKAN METODE HIDROTERMAL","authors":"Nelson Silitonga, Nurliana Tarigan, Gimelliya Saragih, Vivi Purwandari, Ahmad Zukhruf Akbari","doi":"10.51544/kimia.v7i1.3906","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3906","url":null,"abstract":"Meningkatnya kesadaran tentang polusi telah menyebabkan pengembangan solusi untuk masalah lingkungan dengan memaksimalkan pemanfaatan biomassa yang berlimpah untuk pembuatan nanokarbon. Penelitian ini bertujuan untuk memanfaatkan limbah padat kelapa sawit menjadi material yang memiliki nilai guna dan nilai ekonomis menjadi nanokarbon dan material yang berteknologi tinggi. nanokarbon yang berasal dari pelepah dan cangkang sawit yang dibuat melalui metode hidrotermal dengan 180oC selama 2 jam dengan pelarut air dan dilakukan metode ultrasonikasi selama 15 menit. Nanokarbon yang didapat dikarakterisasi menggunakan Fourier Tranform Infrared (FTIR), X-Ray Difraktometer (XRD), dan Particle Size Analyzer (PSA). Dari hasil analisa gugus fungsi menggunakan FTIR telah menunjukan gugus fungsi nanokarbon dan ditemukan perubahan ukuran partikel yang sangat signifikan dari proses sebelum dan sesudah proses hidrotermal, yaitu 895,2 nm menjadi 334,2 nm. Peningkatan volume pori dan luas permukaan partikel masing-masing sebesar 3,5% dan 63% setelah proses hidrotermal.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128016516","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3867
Donda Donda, E. Salim, Darni Paranita, Yosua Francisco
Telah dilakukan penelitian terhadap besar ukuran Tandan Kosong Kelapa Sawit (TKKS) terhadap beberapa bahan polimer yaitu LDPE (Low Density Polietilena), HDPE (High Density Polietilena, dan PVA (Polivinil Alkohol) diperoleh hasil terhadap daya serap air sangat dipengaruhi terhadap ukuran TKKS dimana semakin besar ukuran bahan (10 mesh) pada bahan LDPE semakin besar daya serap air = 9,47 %, sedangkan pada HDPE semakin besar ukuran TKKS (10 mesh) semakin besar daya serap = 2,34 %, dan untuk bahan PVA untuk TKKS (10 mesh) semakin besar kadar air semakin kecil =7,39%, kerapatan partikel pada bahan LDPE semakin kecil ukuran TKKS (60 mesh) kerapatan semakin besar = 1,39 g/ml, pada bahan HDPE semakin kecil ukuran TKKS (40 mesh) maka nilai kerapan makin tinggi =1,80 g/ml, sedang pada bahan PVA semakin besar ukuran TKKS akan lebih besar nilai kerapatannya untuk ukuran TKKS (20 mesh ) =1,09 g/ml. Keteguhan patah (MOR) untuk bahan LDPE semakin besar ukuran TKKS (10 mesh) semakin semakin besar = 0,70 x 102 kgf/cm2, untuk bahan HDPE semakin besar ukuran TKKS maka keteguhan patah (MOR) semakin besar untuk TKKS (10 mesh) = 0,81 x 102 kgf/cm2 dan untuk bahan PVA semakin kecil ukuran TKKS maka semakin besar nilai keteguhan patah (MOR) untuk TKKS ukuran bahan (60 mesh) = 0,70x 102 kgf/cm2
{"title":"PENGARUH UKURAN PARTIKEL TANDAN KOSONG KELAPA SAWIT (TKKS) DAN CANGKANG SAWIT DALAM PEMBUATAN PAPAN PARTIKEL MENGGUNAKAN POLIETILENA (PE) DAN POLIVINIL ALKOHOL (PVA)","authors":"Donda Donda, E. Salim, Darni Paranita, Yosua Francisco","doi":"10.51544/kimia.v7i1.3867","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3867","url":null,"abstract":"Telah dilakukan penelitian terhadap besar ukuran Tandan Kosong Kelapa Sawit (TKKS) terhadap beberapa bahan polimer yaitu LDPE (Low Density Polietilena), HDPE (High Density Polietilena, dan PVA (Polivinil Alkohol) diperoleh hasil terhadap daya serap air sangat dipengaruhi terhadap ukuran TKKS dimana semakin besar ukuran bahan (10 mesh) pada bahan LDPE semakin besar daya serap air = 9,47 %, sedangkan pada HDPE semakin besar ukuran TKKS (10 mesh) semakin besar daya serap = 2,34 %, dan untuk bahan PVA untuk TKKS (10 mesh) semakin besar kadar air semakin kecil =7,39%, kerapatan partikel pada bahan LDPE semakin kecil ukuran TKKS (60 mesh) kerapatan semakin besar = 1,39 g/ml, pada bahan HDPE semakin kecil ukuran TKKS (40 mesh) maka nilai kerapan makin tinggi =1,80 g/ml, sedang pada bahan PVA semakin besar ukuran TKKS akan lebih besar nilai kerapatannya untuk ukuran TKKS (20 mesh ) =1,09 g/ml. Keteguhan patah (MOR) untuk bahan LDPE semakin besar ukuran TKKS (10 mesh) semakin semakin besar = 0,70 x 102 kgf/cm2, untuk bahan HDPE semakin besar ukuran TKKS maka keteguhan patah (MOR) semakin besar untuk TKKS (10 mesh) = 0,81 x 102 kgf/cm2 dan untuk bahan PVA semakin kecil ukuran TKKS maka semakin besar nilai keteguhan patah (MOR) untuk TKKS ukuran bahan (60 mesh) = 0,70x 102 kgf/cm2","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133545228","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3868
Renny Futeri, Pevi Riani
Research on dissolution determination of Ketoprofen compounds by Spectrophotometry. Ketoprofen is a non-steroidal anti-inflammatory drug compound (NSAID) that works as an anti-inflammatory. Anti-inflammatory here is a group of drugs used to reduce inflammation and relieve pain. The dissolution test is a method used to determine the content of active compounds that dissolve in drugs, where the time, temperature and media are set according to the human stomach and intestines, and can find out how much the content of active compounds dissolves in the human intestines and stomach. This dissolution test, then the ketoprofen drug is read by spectrophotometry. Test the dissolution by spectrophotometer at a wavelength of 260 nm using HCl 0.1 N and buffer pH 7.4. The results of the determination of the dissolution test of the active substance on ketoprofen at the acid stage obtained an average of 0.009% and at the pH 7.4 buffer stage obtained an average content of 86.4155%. It can be concluded that the determination of the ketoprofen dissolution test in the sample meets the requirements (MS), in accordance with the specifications of the Internal Standard of PT Novell Pharmaceutical Laboratories, namely at the acid stage not more than 10% of ketoprofen dissolved in 2 hours, and at the pH 7.4 buffer stage it has a requirement of 75%. ketoprofen dissolved in 45 minutes. In the dissolution of acidic media, 0.1 N HCl is used because its condition resembles that of the stomach.
{"title":"PENENTUAN DISOLUSI PADA OBAT SENYAWA KETOPROFEN SECARA SPEKTROFOTOMETRI","authors":"Renny Futeri, Pevi Riani","doi":"10.51544/kimia.v7i1.3868","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3868","url":null,"abstract":"Research on dissolution determination of Ketoprofen compounds by Spectrophotometry. Ketoprofen is a non-steroidal anti-inflammatory drug compound (NSAID) that works as an anti-inflammatory. Anti-inflammatory here is a group of drugs used to reduce inflammation and relieve pain. The dissolution test is a method used to determine the content of active compounds that dissolve in drugs, where the time, temperature and media are set according to the human stomach and intestines, and can find out how much the content of active compounds dissolves in the human intestines and stomach. This dissolution test, then the ketoprofen drug is read by spectrophotometry. Test the dissolution by spectrophotometer at a wavelength of 260 nm using HCl 0.1 N and buffer pH 7.4. The results of the determination of the dissolution test of the active substance on ketoprofen at the acid stage obtained an average of 0.009% and at the pH 7.4 buffer stage obtained an average content of 86.4155%. It can be concluded that the determination of the ketoprofen dissolution test in the sample meets the requirements (MS), in accordance with the specifications of the Internal Standard of PT Novell Pharmaceutical Laboratories, namely at the acid stage not more than 10% of ketoprofen dissolved in 2 hours, and at the pH 7.4 buffer stage it has a requirement of 75%. ketoprofen dissolved in 45 minutes. In the dissolution of acidic media, 0.1 N HCl is used because its condition resembles that of the stomach.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125096012","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3904
Abdillah Abdillah, Gimelliya Saragih, Muhammad Zaim Akbari, Vivi Purwandari
Polusi udara merupakan masalah yang dihadapi di masa sekarang, kendaraan bermotor menyumbang 70% Polusi udara yang ada di Indonesia. Membran Keramik sebagai penyerap emisi karbon dengan nanokarbon sebagai filler digunakan untuk menyerap gas buang yang dihasilkan oleh kendaraan bermotor. Penelitian ini bertujuan untuk membantu pemerintah dalam mengatasi polusi udara dengan memanfaatkan limbah padat kelapa sawit. Tanah liat sebagai matriks di aktivasi menggunakan KOH, serbuk pelepah sawit sebagai pembentuk pori dan menggunakan nanokarbon sebagai filler yang berasal dari cangkang sawit yang dibuat melalui metode hidrotermal dengan 180oC selama 6 jam dengan pelarut air dengan perbandingan 80:15:5. Campuran di hotpress dengan suhu 120oC dilanjutkan dengan proses furnance dengan suhu 600oC selama 1 jam. menghasilkan kekuatan tarik sebesar 6.475 Mpa. Hasil analisa FTIR membran keramik berpori menunjukan adanya gugus fungsi bahan baku pembentuk membran keramik dan dari hasil analisa DSC membran keramik menunjukan bahwa kemampuan termal penggunaan membran keramik dapat digunakan dibawah temperatur 470oC. Hasil uji data filtrasi (emisi gas buang) pada keramik berpori yang dihasilkan dapat di lihat CO terserap 3,20%, CO2 terserap 5.6% dan HC terserap 418 ppm.
{"title":"PEMBUATAN PENYERAP GAS BUANG KENDARAAN BERMOTOR BERBASIS LIMBAH PADAT KELAPA SAWIT","authors":"Abdillah Abdillah, Gimelliya Saragih, Muhammad Zaim Akbari, Vivi Purwandari","doi":"10.51544/kimia.v7i1.3904","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3904","url":null,"abstract":"Polusi udara merupakan masalah yang dihadapi di masa sekarang, kendaraan bermotor menyumbang 70% Polusi udara yang ada di Indonesia. Membran Keramik sebagai penyerap emisi karbon dengan nanokarbon sebagai filler digunakan untuk menyerap gas buang yang dihasilkan oleh kendaraan bermotor. Penelitian ini bertujuan untuk membantu pemerintah dalam mengatasi polusi udara dengan memanfaatkan limbah padat kelapa sawit. Tanah liat sebagai matriks di aktivasi menggunakan KOH, serbuk pelepah sawit sebagai pembentuk pori dan menggunakan nanokarbon sebagai filler yang berasal dari cangkang sawit yang dibuat melalui metode hidrotermal dengan 180oC selama 6 jam dengan pelarut air dengan perbandingan 80:15:5. Campuran di hotpress dengan suhu 120oC dilanjutkan dengan proses furnance dengan suhu 600oC selama 1 jam. menghasilkan kekuatan tarik sebesar 6.475 Mpa. Hasil analisa FTIR membran keramik berpori menunjukan adanya gugus fungsi bahan baku pembentuk membran keramik dan dari hasil analisa DSC membran keramik menunjukan bahwa kemampuan termal penggunaan membran keramik dapat digunakan dibawah temperatur 470oC. Hasil uji data filtrasi (emisi gas buang) pada keramik berpori yang dihasilkan dapat di lihat CO terserap 3,20%, CO2 terserap 5.6% dan HC terserap 418 ppm.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128871916","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3884
Sherlyna Pertiwi, Malemta Tarigan, M. Harahap, Adiansyah
Paper production is currently important for various community needs due to the use in daily life. The aim of this study is to produce paper cellulose-based extracted from Nata de Coco with the addition of polyvinyl alcohol (PVA) as an adhesive. The paper was produced by using pulp method followed by ultrasonication with variation of ultrasonication from 10 min, 20 min, to 30 min. The sample was characterized in terms of functional groups and mechanical properties. The results showed that the longer the ultrasonication time, the lower the mechanical value. The highest tensile test was obtained at 10 min of ultrasonication with the value of 5.036 MPa.
{"title":"MECHANICAL PROPERTIES OF CELLULOSE-BASED EXTRACTED FROM NATA DE COCO","authors":"Sherlyna Pertiwi, Malemta Tarigan, M. Harahap, Adiansyah","doi":"10.51544/kimia.v7i1.3884","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3884","url":null,"abstract":"Paper production is currently important for various community needs due to the use in daily life. The aim of this study is to produce paper cellulose-based extracted from Nata de Coco with the addition of polyvinyl alcohol (PVA) as an adhesive. The paper was produced by using pulp method followed by ultrasonication with variation of ultrasonication from 10 min, 20 min, to 30 min. The sample was characterized in terms of functional groups and mechanical properties. The results showed that the longer the ultrasonication time, the lower the mechanical value. The highest tensile test was obtained at 10 min of ultrasonication with the value of 5.036 MPa.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131120675","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3869
Renny Futeri
Research on determination of Profenofos Pesticide Residue Levels on Agafha Tomatoes Using Gas Chromatography Method has been carried out. The purpose of conducting research on samples of tomatoes that are often consumed by the community is to find out whether the tomato plants are suitable for consumption by the community or whether they have a negative impact if consumed frequently and to find out whether the tomato samples reach the maximum residue limit that has been set. After analyzing the Agaftha tomato samples in the pesticide laboratory, data was obtained that the Agaftha tomatoes contained prefenofos pesticide residues with a concentration of 0.0805 mg/kg, and the results of this test stated that the Agaftha tomato samples could be consumed properly because the concentration did not exceed the maximum residue limit. Prefenofos residue is regulated in the Regulation of the Minister of Agriculture of the Republic of Indonesia Number 55/PERMENTAN/KR.040/11/2015. The maximum residue limit (BMR) for the active ingredient profenofos is 10 mg/Kg. Hence, it can be concluded that the Agaftha tomato sample is suitable for consumption because the concentration of residue levels in the Agaftha tomato sample is lower than the BMR which has been regulated in the Regulation of the Minister of Agriculture of the Republic of Indonesia.
{"title":"PENENTUAN KADAR RESIDU PESTISIDA PROFENOFOS PADA TANAMAN TOMAT GAFHA DENGAN METODE GAS CHROMATOGRAPHY","authors":"Renny Futeri","doi":"10.51544/kimia.v7i1.3869","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3869","url":null,"abstract":"Research on determination of Profenofos Pesticide Residue Levels on Agafha Tomatoes Using Gas Chromatography Method has been carried out. The purpose of conducting research on samples of tomatoes that are often consumed by the community is to find out whether the tomato plants are suitable for consumption by the community or whether they have a negative impact if consumed frequently and to find out whether the tomato samples reach the maximum residue limit that has been set. After analyzing the Agaftha tomato samples in the pesticide laboratory, data was obtained that the Agaftha tomatoes contained prefenofos pesticide residues with a concentration of 0.0805 mg/kg, and the results of this test stated that the Agaftha tomato samples could be consumed properly because the concentration did not exceed the maximum residue limit. Prefenofos residue is regulated in the Regulation of the Minister of Agriculture of the Republic of Indonesia Number 55/PERMENTAN/KR.040/11/2015. The maximum residue limit (BMR) for the active ingredient profenofos is 10 mg/Kg. Hence, it can be concluded that the Agaftha tomato sample is suitable for consumption because the concentration of residue levels in the Agaftha tomato sample is lower than the BMR which has been regulated in the Regulation of the Minister of Agriculture of the Republic of Indonesia.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126164078","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3909
Pevi Riani, Renny Futeri
This study aims to determine a suitable medium for the growth Trichoderma harzianum. The treatments tested were rice media (M1), bran media (M2), corn media (M3), potato media (M4), and rice husk mixed media (M5). The parameters observed in this study were the quality test of conidia density using a microscope and haemacytometer, macroscopic observation of the media for 7 days and microscopic observation of the media to evaluate the media that had the best effectiveness as a medium for propagation of Trichoderma harzianum. The initial isolate of Trichoderma harzianum used had a conidia density of 2,9x109conidia/ml. The results showed that the propagation of Trichoderma harzianum in various media affected the macroscopic, microscopic and conidia density changes of Trichoderma harzianum. Trichoderma harzianum can grow on all treatment media. The bran media is the medium with the highest conidia density compared to other media.
{"title":"PENENTUAN JENIS MEDIA TERHADAP EFEKTIVITAS PERTUMBUHAN JAMUR TRICHODERMA HARZIANUM","authors":"Pevi Riani, Renny Futeri","doi":"10.51544/kimia.v7i1.3909","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3909","url":null,"abstract":"This study aims to determine a suitable medium for the growth Trichoderma harzianum. The treatments tested were rice media (M1), bran media (M2), corn media (M3), potato media (M4), and rice husk mixed media (M5). The parameters observed in this study were the quality test of conidia density using a microscope and haemacytometer, macroscopic observation of the media for 7 days and microscopic observation of the media to evaluate the media that had the best effectiveness as a medium for propagation of Trichoderma harzianum. The initial isolate of Trichoderma harzianum used had a conidia density of 2,9x109conidia/ml. The results showed that the propagation of Trichoderma harzianum in various media affected the macroscopic, microscopic and conidia density changes of Trichoderma harzianum. Trichoderma harzianum can grow on all treatment media. The bran media is the medium with the highest conidia density compared to other media.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127488839","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}
Pub Date : 2023-06-14DOI: 10.51544/kimia.v7i1.3942
N. Sari
Dalam penentuan uji kadar karbohidrat , pada sampel limbah buah mengkudu dilakukan analisis, yaitu analisis secara kuantitatif dan kualitatif. Uji analisis yang sudah dilakukan dalam analisis hidrolisis selulosa limbah buah mengkudu secara kualitatif yaitu menggunakan uji benedict sehingga menghasilkan endapan merah bata dan secara kuantitatif menggunakan metode Nelson-Somogyi menghasilkan kadar gula reduksi sebsar 11.87%. Secara berkelanjutan dilakukan uji penentuan kadar karbohidrat dari hasil hidrolisis yaitu analisis karbohidrat total dan analisis gula reduksi dengan metode Luff Schoorl. Akhir penelitian yang sudah dilakukan dari hidrolisis selulosa limbah buah mengkudu, menunjukkan bahwa hasil rata-rata total kadar karbohidrat yaitu 51. 83% dan hasil gula reduksi rata-rata menurut metode Luff Schoorl adalah 16.52%. Karbohidrat berperan sebagai pemberi rasa manis, penentuan kadar karbohidrat dilakukan dengan mengukur jumlah gula reduksi yang dikandungnya. Rasa manis ini dikarenakan adanya gula reduksi.
{"title":"IDENTIFIKASI ANALISIS KADAR KARBOHIDRAT DAN KADAR GULA REDUKSI METODE LUFF SCHOORL DARI HIDROLISIS SELULOSA LIMBAH MENGKUDU (Morinda citrifolia L.)","authors":"N. Sari","doi":"10.51544/kimia.v7i1.3942","DOIUrl":"https://doi.org/10.51544/kimia.v7i1.3942","url":null,"abstract":"Dalam penentuan uji kadar karbohidrat , pada sampel limbah buah mengkudu dilakukan analisis, yaitu analisis secara kuantitatif dan kualitatif. Uji analisis yang sudah dilakukan dalam analisis hidrolisis selulosa limbah buah mengkudu secara kualitatif yaitu menggunakan uji benedict sehingga menghasilkan endapan merah bata dan secara kuantitatif menggunakan metode Nelson-Somogyi menghasilkan kadar gula reduksi sebsar 11.87%. Secara berkelanjutan dilakukan uji penentuan kadar karbohidrat dari hasil hidrolisis yaitu analisis karbohidrat total dan analisis gula reduksi dengan metode Luff Schoorl. Akhir penelitian yang sudah dilakukan dari hidrolisis selulosa limbah buah mengkudu, menunjukkan bahwa hasil rata-rata total kadar karbohidrat yaitu 51. 83% dan hasil gula reduksi rata-rata menurut metode Luff Schoorl adalah 16.52%. Karbohidrat berperan sebagai pemberi rasa manis, penentuan kadar karbohidrat dilakukan dengan mengukur jumlah gula reduksi yang dikandungnya. Rasa manis ini dikarenakan adanya gula reduksi.","PeriodicalId":332205,"journal":{"name":"JURNAL KIMIA SAINTEK DAN PENDIDIKAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131399625","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}
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