KOVALEN: Jurnal Riset Kimia最新文献_第4页

Pengaruh Penambahan Variasi KJ-CTAB Terhadap Karakteristik ZnO/KJ-CTAB yang Disintesis Menggunakan Metode Impregnasi Basah 使用湿内植入方法合成的KJ-CTAB变体对ZnO/KJ-CTAB特性的影响

KOVALEN: Jurnal Riset Kimia Pub Date : 2023-04-21 DOI: 10.22487/kovalen.2023.v9.i1.16036

Azzalina Nur Alviana, Aulia Dewi Rosanti, Rizky Arief Shobirin, Fahmi Hidayat

{"title":"Pengaruh Penambahan Variasi KJ-CTAB Terhadap Karakteristik ZnO/KJ-CTAB yang Disintesis Menggunakan Metode Impregnasi Basah","authors":"Azzalina Nur Alviana, Aulia Dewi Rosanti, Rizky Arief Shobirin, Fahmi Hidayat","doi":"10.22487/kovalen.2023.v9.i1.16036","DOIUrl":"https://doi.org/10.22487/kovalen.2023.v9.i1.16036","url":null,"abstract":"Semiconductor photocatalysts have great potential in solving environmental problems. The photocatalyst process using a semiconductor is one of the technology to oxidize organic compounds such as dyes. Orange peel (KJ) is one of the adsorbents that have the potential for purification of dyes that increase the photocatalytic activity of ZnO material. This study aims to determine the optimum variation of KJ-CTAB to be added to ZnO material. The results of the synthesis of ZnO/KJ-CTAB varasis 1:25, 2:25, and 3:25 (w/v) using the wet impregnation method were characterized on IR, XRD, SEM, DR-UV, and BET instruments. The results showed that FTIR also showed the presence of ZnO bonds in all samples, C-H in samples varied from 1:25, 2:25, and 3:25 (w/v). The XRD results showed that the percentage of crystallinity decreased and the SEM results showed that ZnO/KJ-CTAB 1:25 had a more homogeneous morphology. Based on the results of DR-UV ZnO/KJ-CTAB 1: 25 (w/v) has a band gap energy value of 3.20 eV which is good for use in photocatalyst processes. BET results show that all samples belong to the mesoporous size.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"2016 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86509949","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}

引用次数: 0

Studi Pemanfaatan Limbah Cair Ikan dan Udang sebagai Substrat dalam Produksi Listrik pada Sistem Microbial Fuel Cell (MFC) 研究鱼和虾的废弃物利用作为微生物燃料系统(MFC)电能生产的基质分析。

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.16033

A. Alif, Muhamad Jalil Baari, Amalyah Febryanti

{"title":"Studi Pemanfaatan Limbah Cair Ikan dan Udang sebagai Substrat dalam Produksi Listrik pada Sistem Microbial Fuel Cell (MFC)","authors":"A. Alif, Muhamad Jalil Baari, Amalyah Febryanti","doi":"10.22487/kovalen.2022.v8.i3.16033","DOIUrl":"https://doi.org/10.22487/kovalen.2022.v8.i3.16033","url":null,"abstract":"Microbial fuel cell (MFC) is a technology that utilizes bacteria in organic medium that can convert chemical energy into electrical energy. This technology can be used to treat fishery waste and shrimp waste which is rich in organic matter. This study aimed to measure the performance of the MFC system on fishery wastewater and shrimp wastewater as a means of producing bio-electricity while reducing the waste load. This study used different types of electrodes, including zinc, aluminum, copper, and carbon graphite. This technology used 0.2 M KMNO4 electrolyte solution. The research method includes three stages; production of fishery wastewater and shrimp wastewater, assembly of a dual chamber MFC bioreactor, and measurement of waste electrical energy produced. The value of electricity production with the highest average in fishery wastewater was obtained by adding electrolyte solution to the Zn/Cu electrode during 117 hours of observation were 6.86 mA with a potential difference of 1.469 V meanwhile in shrimp wastewater was obtained by adding electrolyte solution to the Al/Cu electrode were 4.38 mA with a potential difference of 1.335 V.This study can be concluded that higher electricity production is obtained from the utilization of fish wastewater using Zn/Cu electrode.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82489373","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}

引用次数: 1

Ekstraksi Teh Hijau dan Aplikasinya sebagai Pengendali Korosi Pada Pompa di Lingkungan Garam NaCl 3,56% 在NaCl 3.56%的环境中，绿茶的提取和作为腐蚀控制的应用

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.16160

Retno Indarti

{"title":"Ekstraksi Teh Hijau dan Aplikasinya sebagai Pengendali Korosi Pada Pompa di Lingkungan Garam NaCl 3,56%","authors":"Retno Indarti","doi":"10.22487/kovalen.2022.v8.i3.16160","DOIUrl":"https://doi.org/10.22487/kovalen.2022.v8.i3.16160","url":null,"abstract":"Green tea leaves contain antioxidant compounds that can be used as organic inhibitors in a corrosion process. Tea leaves were extracted by maceration method using 70% ethanol solution with a solid:solvent ratio of 1:8 (w/v) for 1 x 24 hours in an atmospheric room. The extract was then concentrated with a rotary evaporator and separated with solvent under vacuum conditions at 852 mbar, temperature of 70oC and rotation of 80 rpm. The results of the qualitative test of extra tea leaves using 10% NaOH and 1% FeCl3 changed the color to brownish orange and blue-black. This indicates the content of flavonoids and tannins. Green tea leaf extract is also applied to control the corrosion rate of brass metal. Variations in the concentration of tea leaves were 200, 400, 600 ppm in 3.56% NaCl solution. The pump circulation is carried out for 40 hours, the weight loss method is carried out every 8 hours. The average corrosion rate without inhibitor is 3.95 mmpy, the corrosion rate with 200 ppm inhibitor is 1.24 mmpy, the corrosion rate with 400 ppm inhibitor is 0.46 mmpy, the corrosion rate with 600 ppm inhibitor is 0.23 mmpy. A significant decrease in the corrosion rate occurred at a concentration of 600 ppm with an efficiency of 92.32%.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87813018","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}

引用次数: 1

Aktivitas Afrodisiak Ekstrak Etanol Daun Tumbuhan Bungkus (Smilax rotundifolia L.) terhadap Fertilitas Tikus Putih Jantan (Rattus norvegicus) 包叶植物乙醇提取物(笑)对雄性白老鼠的受精(学名Rattus norvegicus)的春药活性

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.15825

Ayu Wulandari, Recky Patala, K. Handayani, Monica Sandra Makatang

{"title":"Aktivitas Afrodisiak Ekstrak Etanol Daun Tumbuhan Bungkus (Smilax rotundifolia L.) terhadap Fertilitas Tikus Putih Jantan (Rattus norvegicus)","authors":"Ayu Wulandari, Recky Patala, K. Handayani, Monica Sandra Makatang","doi":"10.22487/kovalen.2022.v8.i3.15825","DOIUrl":"https://doi.org/10.22487/kovalen.2022.v8.i3.15825","url":null,"abstract":"Aphrodisiac is a substance that can increase stamina, libido (sexual desire), and male fertility. This study aims to determine the secondary metabolites contained in the leaves of the Bungkus plant (Smilax rotundifolia L.), to determine the aphrodisiac activity of the leaf extract of the Bungkus plant on the fertility parameters of male white rats (Rattus norvegicus). This study used an experimental method with a modified post-test randomized controlled group design using 15 male white rats and 30 female white rats which were divided into 3 treatment groups, namely pairing each male rat with 2 female white rats (1 : 2). Each group consisted of 5 male rats and 10 female rats, namely the normal control group (NaCMC 0.5%), the positive control group (X-Gra 51.37 mg/kgBW), the control group the leaf extract test sample of the Bungkus plant (S. rotundifolia L.) with a dose of 200 mg/kgBW. The research data were analyzed using the SPSS 25 statistical test. The results of this study indicate that the leaf extract of the Bungkus plant contains secondary metabolites flavonoids, saponins, alkaloids and tannins. The administration of Bungkus leaf extract at a dose of 200 mg/kgBW showed a difference in the percentage value of the pregnancy index and a significant effect on the fertility index value.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83285451","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}

引用次数: 0

Adsorpsi Ion Pb(II) Menggunakan Silika Berbasis Pasir Alam Takari-NTT Pb的地址是基于沙丘的天然沙丘

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.16143

Johnson N. Naat

引用次数: 1

Sintesis dan Karakterisasi Fe₂TiO₅ dari Besi Oksida dan Titanium Dioksida dengan Metode Planetary Ball-Mill 和Fe₂TiO₅描述合成氧化铁和二氧化钛的行星Ball-Mill方法

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.15644

L. Kadir, M. Azis, S. Musiam, V. A. Fabiani, Karnelasatri, D. Permana, T. Azis, Syahrir

引用次数: 0

Efektivitas Fotodegradasi Lignin dari Limbah Ampas Sagu (Metroxylon sagu Rottb.) Menggunakan Katalis TiO₂ 聚氨酯残留废物的光合作用。使用催化剂TiO₂

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.16149

M. Natsir, Aden Mula Pratiwi, Thamrin Azis, Nohong, Imran, Wa Ode Harlis, Alimin, La Ode Kadidae, Ruslan, C. Bijang, L. A. Kadir, Laily Nurliana

{"title":"Efektivitas Fotodegradasi Lignin dari Limbah Ampas Sagu (Metroxylon sagu Rottb.) Menggunakan Katalis TiO₂","authors":"M. Natsir, Aden Mula Pratiwi, Thamrin Azis, Nohong, Imran, Wa Ode Harlis, Alimin, La Ode Kadidae, Ruslan, C. Bijang, L. A. Kadir, Laily Nurliana","doi":"10.22487/kovalen.2022.v8.i3.16149","DOIUrl":"https://doi.org/10.22487/kovalen.2022.v8.i3.16149","url":null,"abstract":"Lignin degradation from sago (Metroxylon sagu Rottb.) waste has been carried out using a TiO2 catalyst. This research aims to determine the effectiveness of lignin degradation from sago waste using a TiO2 catalyst. Lignin from sago pulp was isolated using 10% NaOH and characterized using Fourier Transform Infra Red (FTIR) spectroscopy. The results of the characterization using FTIR show that the absorption at wave number 2937.59 cm-1 is the -C-H stretching vibration of the alkane functional groups, the absorption at wave number 2360.87 cm-1 is the vibration of the C≡C triple bond, the wave numbers 1795.73 cm-1 and 1637.56 cm-1 are associated with the stretching of the carbonyl group. The absorption at wave number 1427.32 cm-1 is a C-H vibration connected to an unsaturated bond in an aromatic ring. Absorptions at wave number 1105.21 cm-1, 1128.36 cm-1, 1153.43 cm-1 were the stretching vibration of -C-H on the guaiasil ring, and the absorption at wave number 1022.27 cm-1 was the stretching vibration of C-O-C ether. From this spectrum, it can be seen that lignin is not completely pure because it is probably still mixed with cellulose. The results of the effectiveness test of lignin degradation using a TiO2 catalyst with the help of UV light were able to degrade the lignin isolated by 31.43%, for 3 hours at a lignin concentration of 40 ppm.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74447506","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}

引用次数: 0

Penambatan Molekuler Penghambatan Aktivitas Enzim α-Amilase dan α-Glukosidase oleh Senyawa Aktif Daun Kirinyuh (Chromolaena odorata L.) 确保活动分子抑制酶α-Amilase和α-Glukosidase活跃树叶Kirinyuh化合物(Chromolaena odorata L .)

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.16046

Nelson Gaspersz, Matthew Adi Honey Amos, Sitti Hardiyanti Kalauw, Indrid Harjuni, M. R. Sohilait

{"title":"Penambatan Molekuler Penghambatan Aktivitas Enzim α-Amilase dan α-Glukosidase oleh Senyawa Aktif Daun Kirinyuh (Chromolaena odorata L.)","authors":"Nelson Gaspersz, Matthew Adi Honey Amos, Sitti Hardiyanti Kalauw, Indrid Harjuni, M. R. Sohilait","doi":"10.22487/kovalen.2022.v8.i3.16046","DOIUrl":"https://doi.org/10.22487/kovalen.2022.v8.i3.16046","url":null,"abstract":"An in silico study was conducted to inhibit the active compound in Kirinyuh leaves (Chromolaena odorata L.) against α-amylase and α-glucosidase enzymes using a molecular docking approach. The docking was carried out on 19 active compounds that had been identified in Kirinyuh leaves and were optimized using the PM3 method. The best results in inhibit on of the α-amylase enzyme were shown by compounds from the flavanone group, namely genkwanin and sakuranetin with binding affinities of -8.3 kcal/mol and -8.1 kcal/mol, respectively, while the best results in inhibiting on of the α-glucosidase enzyme were shown by two compounds from the hydroxybenzoic acid group, namely p-coumaric acid and p-hydroxybenzoic acid with bond affinities of -5.7 kcal.mol and -5.5 kcal.mol, respectively. The interaction between α-amylase with genkwanin and sakuranetin produces one conventional hydrogen bond GLU 233 and GLN 63 respectively. The interaction between α-glucosidase with p-coumaric acid and p-hydroxybenzoic acid produces three conventional hydrogen bonds, HIS 112; GLN 182; ASP 352 and GU 277; GLN 279; ASP 352.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"202 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73958869","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}

引用次数: 1

Analisis Kadar Merkuri (Hg) pada Rambut Pekerja Tambang di Pertambangan Emas Tanpa Ijin (PETI) Kabupaten Parigi Moutong dalam Hubungannya dengan Frekuensi Konsumsi Ikan 分析未经许可的帕里吉-穆当地区矿业工人头发中的汞(Hg)水平与鱼类消费频率有关

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.16121

Musafira, Ernawaty Rasul

{"title":"Analisis Kadar Merkuri (Hg) pada Rambut Pekerja Tambang di Pertambangan Emas Tanpa Ijin (PETI) Kabupaten Parigi Moutong dalam Hubungannya dengan Frekuensi Konsumsi Ikan","authors":"Musafira, Ernawaty Rasul","doi":"10.22487/kovalen.2022.v8.i3.16121","DOIUrl":"https://doi.org/10.22487/kovalen.2022.v8.i3.16121","url":null,"abstract":"Illegal gold mining is a mining activity using traditional methods. Mining activities in the traditional way process mining products using the amalgamation process. In the amalgamation process, gold is bound by adding mercury and the waste from the amalgamation process which may still contain mercury is discharged into the environment. It can have an impact on the accumulation of mercury in humans, especially the miners either directly or through the food chain. This study aims to determine the amount of mercury concentration that has accumulated in miners' hair in relation to the frequency of fish consumption. The sampling method is done by random sampling method in five sub-districts in Parigi Moutong Regency. Fish consumption frequency data was taken by filling out questionnaires by respondents (miners). Analysis of mercury content in hair samples was carried out using the Mercury Analyzer NIC MA-3000. The results showed that the concentration of mercury in miners in all sub-districts exceeded the quality standard set by USEPA, which was above 1 mg/Kg. The highest mercury content was found in the miner's hair in Moutong District which was 3.48 mg/kg, while the lowest mercury content was found in the miner’s hair in Kasimbar District which was 1.06 mg/kg. Based on these results, the gold miners in the five sub-districts have been contaminated with mercury. A correlation value above 0.5 indicates a correlation between fish consumption and mercury concentrations in hair, thereby it can be said that the source of mercury exposure to miners can also come from the fish they consume.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79369841","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}

引用次数: 1

Validasi Metode Penetapan Kadar Logam Kadmium (Cd) dalam Sampel Tanah Menggunakan Spektrofotometer Serapan Atom (SSA)-Nyala 使用原子吸收光谱仪(SSA - work)，验证土壤样品中镉(Cd)金属水平的方法

KOVALEN: Jurnal Riset Kimia Pub Date : 2022-12-29 DOI: 10.22487/kovalen.2022.v8.i3.16028

Tita Rosita, Dewi Arfina Prasetyo Ningrum, Yulisma Yanti, Zaekhan

{"title":"Validasi Metode Penetapan Kadar Logam Kadmium (Cd) dalam Sampel Tanah Menggunakan Spektrofotometer Serapan Atom (SSA)-Nyala","authors":"Tita Rosita, Dewi Arfina Prasetyo Ningrum, Yulisma Yanti, Zaekhan","doi":"10.22487/kovalen.2022.v8.i3.16028","DOIUrl":"https://doi.org/10.22487/kovalen.2022.v8.i3.16028","url":null,"abstract":"Soil has an important role in life on earth because it supports plant life by providing nutrients and water as well as supporting roots. One of the chemical elements that cause pollution is cadmium. The standard method for analyzing the content of cadmium metal in the soil is using a Flame Atomic Absorption Spectrophotometer (AAS) referring to SNI 8910:2021. This method changes the weight content from one gram to five grams of sample to obtain cadmium metal levels that can be detected by the instrument. Therefore, this method needs to be validated before being used for routine analysis in the laboratory. The validation parameters are linearity, precision, accuracy, method detection limit, and robustness. The Validation results were obtained for the linearity parameter correlation coefficient value of r = 0.999, %RSD repeatability precision parameter of 1.51%, and the intermediate precision was obtained by %RSD analyst 1 : 1.51% and analyst 2 : 0.82%, accuracy parameter obtained the %recovery results were (88.73-97.01)%, the LDM parameter was obtained at 2.03 mg/kg, the robustness parameter was obtained by F-count of 1.25 and F-table of 3.40 which shows the average assay of metals Cd weighing 1, 3, 5, and 8 grams that were not significantly different. Overall, the results of the validation show that the method of assaying cadmium metal using Flame-AAS complies with the acceptance requirements, therefore it can be used for routine analysis in the laboratory.","PeriodicalId":17905,"journal":{"name":"KOVALEN: Jurnal Riset Kimia","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86035351","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}

引用次数: 0