Breast cancer is the most frequent cancer among women worldwide, and it is also the main cause of death from cancer. Fern Angiopteris angustifolia C. Presl and Liverwort Mastigophora diclados (Birs.ex Web) Nees are the plants that grow in Indonesia that are limited explored for their phytochemical and biological activity. This study aims to evaluate the cytotoxic effect of ethanolic extracts leaves of A. angustifolia and M. diclados against breast cancer cell lines (MCF-7). The MTT assay was used to determine cytotoxic activity, which revealed that the ethanol extract of A. Angustifolia and M. diclados exhibited cytotoxic activity with an IC50 value of 121.8 ± 13.3 and 29.2 ±1.4 µg /mL, respectively.
{"title":"Cytotoxic Activity of the Indonesian Fern Angiopteris angustifolia C. Presl and Liverwort Mastigophora diclados (Birs. ex Web) Nees Against Breast Cancer Cell Lines (MCF-7)","authors":"Ismiarni Komala, Stevani Sitorus, Fitri Ratna Dewi, Nurmeilis Nurmeilis, L. Hendarmin","doi":"10.15408/jkv.v8i1.22645","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.22645","url":null,"abstract":"Breast cancer is the most frequent cancer among women worldwide, and it is also the main cause of death from cancer. Fern Angiopteris angustifolia C. Presl and Liverwort Mastigophora diclados (Birs.ex Web) Nees are the plants that grow in Indonesia that are limited explored for their phytochemical and biological activity. This study aims to evaluate the cytotoxic effect of ethanolic extracts leaves of A. angustifolia and M. diclados against breast cancer cell lines (MCF-7). The MTT assay was used to determine cytotoxic activity, which revealed that the ethanol extract of A. Angustifolia and M. diclados exhibited cytotoxic activity with an IC50 value of 121.8 ± 13.3 and 29.2 ±1.4 µg /mL, respectively.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45740649","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}
U. Pratomo, A. Hardianto, Y. Hartati, H. Bahti, S. Wyantuti
There is often a drawback during the determination of Eu in aqueous solvents using the voltammetric method. The current signal from water can reduce that of the element, which causes difficulty while separating the Eu signal from other rare earth elements (REE). Therefore, this study used acetonitrile as a solvent due to its high electrical conductivity and wide potential range. The optimum conditions for the determination of Eu in acetonitrile using the Box-Behnken design include 74.56 seconds deposition time, 0.125 V amplitude modulation, and -2.0 V potential deposition. The platinum electrode's performance showed a recovery value of 98.91% and accuracy and precision (in %RSD) of 96.67% and 1.11%, respectively. Furthermore, detection and quantitation limits of 0.6 mg/L and 5.1 mg/L were recorded from the analysis. It concluded that the differential pulse voltammetry method was applied to determine the presence of Eu in acetonitrile.
{"title":"The Effect of Acetonitrile Solvent on the Quantitative Determination of Europium (III) by Voltammetry and its Optimization using the Box-Behnken Design","authors":"U. Pratomo, A. Hardianto, Y. Hartati, H. Bahti, S. Wyantuti","doi":"10.15408/jkv.v8i1.22508","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.22508","url":null,"abstract":"There is often a drawback during the determination of Eu in aqueous solvents using the voltammetric method. The current signal from water can reduce that of the element, which causes difficulty while separating the Eu signal from other rare earth elements (REE). Therefore, this study used acetonitrile as a solvent due to its high electrical conductivity and wide potential range. The optimum conditions for the determination of Eu in acetonitrile using the Box-Behnken design include 74.56 seconds deposition time, 0.125 V amplitude modulation, and -2.0 V potential deposition. The platinum electrode's performance showed a recovery value of 98.91% and accuracy and precision (in %RSD) of 96.67% and 1.11%, respectively. Furthermore, detection and quantitation limits of 0.6 mg/L and 5.1 mg/L were recorded from the analysis. It concluded that the differential pulse voltammetry method was applied to determine the presence of Eu in acetonitrile.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44768119","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}
Umi Baroroh, A. Firmansyah, Deni Deni, Lina Maudyawati, Ahmad Zainuddin
Despite the positive impact of the rapid industrial growth in Indonesia, it has caused several problems. The non-biodegradable pollutant, such as reactive dyes that result from the textile industry, is harmful to the environment and human health. This contaminating agent should be removed from the waste before being disposed to the surrounding ecosystem. Adsorption is one of the simple and low-cost techniques to eliminate dye from the effluent. Waste from coral reefs is interesting to be explored as a dye-removing adsorbent because it is abundant in nature, cheap, and reusable. Therefore, this study aims to determine the adsorption performance of coral reef waste in removing several dyes, i.e., methylene blue (MB), remazol brilliant blue (RBB), disperse orange (DO), and vinyl sulfone (VS) from wastewater. The adsorption capacity was determined to evaluate the effectiveness of coral reef waste in removing the dyes at the isotherm model. Adsorption capacity and isotherm model were used to evaluate the effectiveness of this natural adsorbent. Based on the percentage removal and coefficient distribution value, the removal selectivity of RBB was the best, followed by DO, VS, and MB, respectively. In conclusion, coral reef waste is promising to be developed as a low-cost adsorbent for removing dyes from wastewater.
{"title":"Dyes Removal from Wastewater by Coral Reef Waste as a Low-Cost Adsorbent","authors":"Umi Baroroh, A. Firmansyah, Deni Deni, Lina Maudyawati, Ahmad Zainuddin","doi":"10.15408/jkv.v8i1.20673","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.20673","url":null,"abstract":"Despite the positive impact of the rapid industrial growth in Indonesia, it has caused several problems. The non-biodegradable pollutant, such as reactive dyes that result from the textile industry, is harmful to the environment and human health. This contaminating agent should be removed from the waste before being disposed to the surrounding ecosystem. Adsorption is one of the simple and low-cost techniques to eliminate dye from the effluent. Waste from coral reefs is interesting to be explored as a dye-removing adsorbent because it is abundant in nature, cheap, and reusable. Therefore, this study aims to determine the adsorption performance of coral reef waste in removing several dyes, i.e., methylene blue (MB), remazol brilliant blue (RBB), disperse orange (DO), and vinyl sulfone (VS) from wastewater. The adsorption capacity was determined to evaluate the effectiveness of coral reef waste in removing the dyes at the isotherm model. Adsorption capacity and isotherm model were used to evaluate the effectiveness of this natural adsorbent. Based on the percentage removal and coefficient distribution value, the removal selectivity of RBB was the best, followed by DO, VS, and MB, respectively. In conclusion, coral reef waste is promising to be developed as a low-cost adsorbent for removing dyes from wastewater.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47238292","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}
R. Satoto, Rijal Ahmadi, D. Rusdiana, Erni Ernawaty, A. Syampurwadi, A. H. Abdullah
Due to ecological considerations, natural biodegradation composites are widespread in tailoring plastics properties to specific needs. This work aims to demonstrate the available opportunity in using 100 and 140 mesh powdered mango leaf (PML) waste as a filler in polypropylene (PP) composites. Composites were produced via melt blending on a twin-screw internal mixer, with a different particulate size and a weight ratio of PML. Morphology, tensile, flexural, hardness, tear, puncture, thermal, and water absorption properties of the composites were assessed after 0, 1, 7, 14, and 28 days of water immersion. We found that the smaller particle size shows a better mechanical and water absorption of the composites, but not for thermal properties. The mechanical properties decreased with increasing PML content; however, these properties did not differ considerably from pure PP and other composites with natural filler. Besides, these polypropylene/PML composites showed excellent properties in water absorption.
{"title":"Plastic Composites Using Mango Leaf Waste for Cost Effectiveness and Green Environment","authors":"R. Satoto, Rijal Ahmadi, D. Rusdiana, Erni Ernawaty, A. Syampurwadi, A. H. Abdullah","doi":"10.15408/jkv.v8i1.24557","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.24557","url":null,"abstract":"Due to ecological considerations, natural biodegradation composites are widespread in tailoring plastics properties to specific needs. This work aims to demonstrate the available opportunity in using 100 and 140 mesh powdered mango leaf (PML) waste as a filler in polypropylene (PP) composites. Composites were produced via melt blending on a twin-screw internal mixer, with a different particulate size and a weight ratio of PML. Morphology, tensile, flexural, hardness, tear, puncture, thermal, and water absorption properties of the composites were assessed after 0, 1, 7, 14, and 28 days of water immersion. We found that the smaller particle size shows a better mechanical and water absorption of the composites, but not for thermal properties. The mechanical properties decreased with increasing PML content; however, these properties did not differ considerably from pure PP and other composites with natural filler. Besides, these polypropylene/PML composites showed excellent properties in water absorption.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46581979","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}
Hydrogel products are currently widely used in various fields, one of which is agriculture. Most hydrogels are made of synthetic polymers because they have good absorption but are not biodegradable. Glucomannan is a natural polymer that is able to absorb large amounts of water and biodegradable but it is difficult to maintain water content. One method to improve the mechanical properties of hydrogels is by modifying the hydrogels through the formation of an interpenetrating network (IPN) between natural polymers and synthetic polymers. In this study, the IPN hydrogel based on polyvinyl alcohol and glucomannan and acrylamide as a crosslinker was made by combining freeze-thaw and gamma irradiation techniques. The results showed that the hydrogel water absorption after immersion for 24 hours was 311.09% where the weight of glucomannan was 1 g and acrylamide was 0.75 g and the irradiation dose was 30 kGy. The result of cumulative release test of paraquat immobilized into the hydrogel was 12.00% within 10 days. This indicates that the PVA-glucomannan-acrylamide hydrogel can be used as a controlled paraquat release matrix so as to minimize the effect on the overuse of pesticides.
{"title":"Improvement of PVA-Glucomanan-Acrylamide Hydrogel as Base Material of Immobilization","authors":"Repita Sari, S. Mulijani, M. Suhartini","doi":"10.15408/jkv.v8i1.20332","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.20332","url":null,"abstract":"Hydrogel products are currently widely used in various fields, one of which is agriculture. Most hydrogels are made of synthetic polymers because they have good absorption but are not biodegradable. Glucomannan is a natural polymer that is able to absorb large amounts of water and biodegradable but it is difficult to maintain water content. One method to improve the mechanical properties of hydrogels is by modifying the hydrogels through the formation of an interpenetrating network (IPN) between natural polymers and synthetic polymers. In this study, the IPN hydrogel based on polyvinyl alcohol and glucomannan and acrylamide as a crosslinker was made by combining freeze-thaw and gamma irradiation techniques. The results showed that the hydrogel water absorption after immersion for 24 hours was 311.09% where the weight of glucomannan was 1 g and acrylamide was 0.75 g and the irradiation dose was 30 kGy. The result of cumulative release test of paraquat immobilized into the hydrogel was 12.00% within 10 days. This indicates that the PVA-glucomannan-acrylamide hydrogel can be used as a controlled paraquat release matrix so as to minimize the effect on the overuse of pesticides.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49413995","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}
Asmi’ Munadhiroh, H. W. Wijaya, Nani Farida, S. Golhen, I. Dasna
This study aims to synthesize complex compounds from the Co(II) ion with mixed ligands of 2-aminopyridine and thiocyanate ions. The complexes obtained have Co(II) : 2-aminopyridine: thiocyanate ratio of 1:2:2 based on preliminary analysis by SEM-EDX, DHL, and FTIR. The complex in the form of a blue needle crystal is stable at room temperature and melts at 169 °C. Characterization shows that the complex formed is neutral. The antibacterial activity test was carried out using the diffusion method and show that the resulting complex compounds could inhibit the growth of S. typhi and S. aureus bacteria better than 2-aminopyridine.
{"title":"Synthesis, Characterization, and Preliminary Study of [Co(2- aminopyridine)2(NCS)2] or bis(2-aminopyridine)dithiocyanato cobalt(II) as An Antibacterial","authors":"Asmi’ Munadhiroh, H. W. Wijaya, Nani Farida, S. Golhen, I. Dasna","doi":"10.15408/jkv.v8i1.22685","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.22685","url":null,"abstract":"This study aims to synthesize complex compounds from the Co(II) ion with mixed ligands of 2-aminopyridine and thiocyanate ions. The complexes obtained have Co(II) : 2-aminopyridine: thiocyanate ratio of 1:2:2 based on preliminary analysis by SEM-EDX, DHL, and FTIR. The complex in the form of a blue needle crystal is stable at room temperature and melts at 169 °C. Characterization shows that the complex formed is neutral. The antibacterial activity test was carried out using the diffusion method and show that the resulting complex compounds could inhibit the growth of S. typhi and S. aureus bacteria better than 2-aminopyridine.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45764075","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}
R. Zein, Z. Chaidir, Zilfa Zilfa, S. Fauzia, P. Ramadhani
The present study investigated the ability of modified shrimp shell by Polyethylenimine (PEI) for enhanced removal of metanil yellow. The modification was carried out using citric acid as a cross linker. The removal of metanil yellow by modified shrimp shell-PEI was conducted by batch method and investigated some parameters affected adsorption including pH, initial dye concentration, and contact time. The optimum conditions were achieved at pH 5, initial dye concentration 1200 mg/L, and contact time 90 minutes. The adsorption isotherm study showed that the adsorption of metanil yellow dye by modified shrimp shell-PEI followed the Langmuir isotherm model with a maximum adsorption capacity (qm) 121.951 mg/g. The kinetic study indicated that the adsorption process suited to the pseudo-second-order model. The characterization results revealed the differences in the adsorbent characteristics before and after the adsorption of metanil yellow dye. The cross-linked PEI onto shrimp shell provided more active sites (amine groups) to bind dye molecules. It can be concluded that modified shrimp shell by PEI has increased its ability in metanil yellow removal.
{"title":"Isotherm and Kinetic Studies on the Adsorption Behavior of Metanil Yellow Dyes onto Modified Shrimp Shell-Polyethylenimine (SS-PEI)","authors":"R. Zein, Z. Chaidir, Zilfa Zilfa, S. Fauzia, P. Ramadhani","doi":"10.15408/jkv.v8i1.22566","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.22566","url":null,"abstract":"The present study investigated the ability of modified shrimp shell by Polyethylenimine (PEI) for enhanced removal of metanil yellow. The modification was carried out using citric acid as a cross linker. The removal of metanil yellow by modified shrimp shell-PEI was conducted by batch method and investigated some parameters affected adsorption including pH, initial dye concentration, and contact time. The optimum conditions were achieved at pH 5, initial dye concentration 1200 mg/L, and contact time 90 minutes. The adsorption isotherm study showed that the adsorption of metanil yellow dye by modified shrimp shell-PEI followed the Langmuir isotherm model with a maximum adsorption capacity (qm) 121.951 mg/g. The kinetic study indicated that the adsorption process suited to the pseudo-second-order model. The characterization results revealed the differences in the adsorbent characteristics before and after the adsorption of metanil yellow dye. The cross-linked PEI onto shrimp shell provided more active sites (amine groups) to bind dye molecules. It can be concluded that modified shrimp shell by PEI has increased its ability in metanil yellow removal.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43556374","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}
S. Sulfikar, Gotot Junarto, M. A. Syam, Andi Zulfikar Efendy, Mohamad Sahrir, Hilda Ningsih
Bacteria may become resistant to antibiotics due to gene mutation or adopting resistance genes from other bacteria via horizontal gene transfer. The existence of toxic substances to bacteria, such as antibiotics, biocides, and heavy metals, may influence the pathway into the genome. This study aimed to detect the presence of antibiotic-resistance bacteria in air particulates in Makassar - a provincial capital located in Indonesia with a low to moderate air quality index (AQI). We determined the correlations between antibiotic resistance (resistance rate, RR) and the heavy-metal concentrations in the air particulates. Air particulate samples were taken from seven locations in the summer (Dry Season: July - August 2019). We analyzed the concentration of As, Cu, and Zn of the air particulates and determined RR from presumptive Escherichia coli (E. coli) isolated from the air particulates. We estimated the RR towards five antibiotics with different mechanisms of action: amoxicillin-clavulanate, chloramphenicol, amikacin, norfloxacin, and trimethoprim. The concentrations of the heavy metals were relatively low, ranging from (µg/Nm3) 0.001 – 0.009 for As, 0.001 – 0.003 for Cu, and 0.007 to 0.783 for Zn. We observed different antibiotic resistance at various locations, ranging from 25% to 100% RR. While there were indications of possible antibiotic resistance patterns in the different areas sampled, the power of this perspective snapshot was insufficient to make statistically valid generalizations.
{"title":"A Snapshot of Antibiotic Resistances in Air Particulate of a Provincial Capital City, Indonesia","authors":"S. Sulfikar, Gotot Junarto, M. A. Syam, Andi Zulfikar Efendy, Mohamad Sahrir, Hilda Ningsih","doi":"10.15408/jkv.v8i1.24559","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.24559","url":null,"abstract":"Bacteria may become resistant to antibiotics due to gene mutation or adopting resistance genes from other bacteria via horizontal gene transfer. The existence of toxic substances to bacteria, such as antibiotics, biocides, and heavy metals, may influence the pathway into the genome. This study aimed to detect the presence of antibiotic-resistance bacteria in air particulates in Makassar - a provincial capital located in Indonesia with a low to moderate air quality index (AQI). We determined the correlations between antibiotic resistance (resistance rate, RR) and the heavy-metal concentrations in the air particulates. Air particulate samples were taken from seven locations in the summer (Dry Season: July - August 2019). We analyzed the concentration of As, Cu, and Zn of the air particulates and determined RR from presumptive Escherichia coli (E. coli) isolated from the air particulates. We estimated the RR towards five antibiotics with different mechanisms of action: amoxicillin-clavulanate, chloramphenicol, amikacin, norfloxacin, and trimethoprim. The concentrations of the heavy metals were relatively low, ranging from (µg/Nm3) 0.001 – 0.009 for As, 0.001 – 0.003 for Cu, and 0.007 to 0.783 for Zn. We observed different antibiotic resistance at various locations, ranging from 25% to 100% RR. While there were indications of possible antibiotic resistance patterns in the different areas sampled, the power of this perspective snapshot was insufficient to make statistically valid generalizations.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44395619","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}
Indigosol blue is one of the dyes that has not been widely studied for photodegradation. This study aims to determine the photodegradation activity of indigosol blue using TiO2/Natural zeolite. TiO2 embedded in natural zeolite was synthesized using the sol-gel method. The synthesis results were characterized using X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF), and UV-Vis Diffuse Reflectance Spectroscopy (DRS). The characterization of TiO2-zeolite obtained a bandgap energy of 2.62 eV that could be seen in the UV-Vis DRS spectra. UV light is used during the photodegradation process to irradiate TiO2-zeolite photocatalyst. The results show that the optimum mass of natural TiO2-zeolite photocatalyst was 0.02 g with a degradation percentage of 58.3%. The optimum radiation time was 30 min with a degradation percentage of 58.7%, and the optimum concentration of blue indigosol was 600 ppm with a degradation percentage of 58.7%. TiO2/Natural zeolite photocatalyst could degrade indigosol blue dye effectively at the optimum condition.
{"title":"Photodegradation of Indigosol Blue Dye Using TiO2/Natural Zeolite Photocatalyst","authors":"Lulu’atul Hamidatu Ulya, Husnul Fatimah, Nasrul Alif","doi":"10.15408/jkv.v8i1.24558","DOIUrl":"https://doi.org/10.15408/jkv.v8i1.24558","url":null,"abstract":"Indigosol blue is one of the dyes that has not been widely studied for photodegradation. This study aims to determine the photodegradation activity of indigosol blue using TiO2/Natural zeolite. TiO2 embedded in natural zeolite was synthesized using the sol-gel method. The synthesis results were characterized using X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF), and UV-Vis Diffuse Reflectance Spectroscopy (DRS). The characterization of TiO2-zeolite obtained a bandgap energy of 2.62 eV that could be seen in the UV-Vis DRS spectra. UV light is used during the photodegradation process to irradiate TiO2-zeolite photocatalyst. The results show that the optimum mass of natural TiO2-zeolite photocatalyst was 0.02 g with a degradation percentage of 58.3%. The optimum radiation time was 30 min with a degradation percentage of 58.7%, and the optimum concentration of blue indigosol was 600 ppm with a degradation percentage of 58.7%. TiO2/Natural zeolite photocatalyst could degrade indigosol blue dye effectively at the optimum condition.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44687632","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}
Deden Indra Dinata, R. Maharani, Fauzan Muttaqien, U. Supratman, M. N. Azmi, Y. Shiono
Amomum compactum Soland Ex Maton is one of the Zingiberaceae family plants which is the endemic plants from West Java, Indonesia. This study was aimed to determine the chemical structure of flavonoid compounds from n-hexane extract of A.compactum Sol. Ex Maton roots. Dried powder of the roots was extracted consecutively with n-hexane, ethyl acetate, and methanol solvents. Three flavonoids, 5-hydroxy-3,7,4`-trimethoxy kaempferol (1), 5-hydroxy-3,7,3',4'-tetra methoxy kaempferol (2) and 4'-hydroxy-3,5,7-trimethoxy kaempferol (3), have been isolated from the roots of A. compactum Sol. Ex Maton. The chemical structures of compounds 1-3 were identified by spectroscopy data including infrared 1D-NMR, 2D-NMR and HRTOF-MS as well as by comparison with previously reported spectral data. Compounds 1-3 were isolated from this plant for the first time and showed free radical DPPH scavenging activity.
{"title":"Flavonoids from the Roots of Amomum compactum Soland Ex Maton (Zingiberaceae)","authors":"Deden Indra Dinata, R. Maharani, Fauzan Muttaqien, U. Supratman, M. N. Azmi, Y. Shiono","doi":"10.15408/jkv.v7i2.21599","DOIUrl":"https://doi.org/10.15408/jkv.v7i2.21599","url":null,"abstract":"Amomum compactum Soland Ex Maton is one of the Zingiberaceae family plants which is the endemic plants from West Java, Indonesia. This study was aimed to determine the chemical structure of flavonoid compounds from n-hexane extract of A.compactum Sol. Ex Maton roots. Dried powder of the roots was extracted consecutively with n-hexane, ethyl acetate, and methanol solvents. Three flavonoids, 5-hydroxy-3,7,4`-trimethoxy kaempferol (1), 5-hydroxy-3,7,3',4'-tetra methoxy kaempferol (2) and 4'-hydroxy-3,5,7-trimethoxy kaempferol (3), have been isolated from the roots of A. compactum Sol. Ex Maton. The chemical structures of compounds 1-3 were identified by spectroscopy data including infrared 1D-NMR, 2D-NMR and HRTOF-MS as well as by comparison with previously reported spectral data. Compounds 1-3 were isolated from this plant for the first time and showed free radical DPPH scavenging activity.","PeriodicalId":17786,"journal":{"name":"Jurnal Kimia Valensi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48858902","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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