Pub Date : 2020-09-22DOI: 10.21776/ub.jpacr.2020.009.03.524
Yovilianda M. Untoro, Diaz Ayu Widyasari, Edi Supriadi, S. N. A. Jenie
Rhodamine B can be used as a fluorophore to produce a fluorescent silica nanoparticles derived from geothermal sludge. The purpose of this research is to synthesize fluorescent silica nanoparticles (FSNP) modified with rhodamine B and cetyl trimethyl ammonium bromide (CTAB) using sol-gel method. Geothermal waste was used as a precursor and added with NaOH at 90 0 C to generate sodium silicate. Rhodamine B, as the fluorescent dye were added with concentration variations ranging from 0.156 mg/g to 10 mg/g.CTAB was used as template and HCl 2N was applied as gelling catalyst with aging time of 18 hours. Characterization of FSNP was measured using spectrofluorometer to identify the fluorescent intensity, fourier transform infrared (FT-IR) to determine the functional group of FSNP, BraunerEmmett-Teller (BET) adsorption to calculate the specific area of the particles, X-ray diffraction (XRD) to analyze the crystallographic phases, and transmission electron microscopy (TEM) to analyze the surface morphology of the FSNP. FT-IR and fluorescent intensity results showed that FSNP with 2.5 mg/g of rhodamine B had the optimum characteristics. The FSNP was in amorphous phase with uniform pore distribution. BET analysis showed that the specific surface of the FSNP was 190.22 m 2 /g.
{"title":"The Effect of Rhodamine B on The Properties of Fluorescent Nanoparticles Derived from Geothermal Silica","authors":"Yovilianda M. Untoro, Diaz Ayu Widyasari, Edi Supriadi, S. N. A. Jenie","doi":"10.21776/ub.jpacr.2020.009.03.524","DOIUrl":"https://doi.org/10.21776/ub.jpacr.2020.009.03.524","url":null,"abstract":"Rhodamine B can be used as a fluorophore to produce a fluorescent silica nanoparticles derived from geothermal sludge. The purpose of this research is to synthesize fluorescent silica nanoparticles (FSNP) modified with rhodamine B and cetyl trimethyl ammonium bromide (CTAB) using sol-gel method. Geothermal waste was used as a precursor and added with NaOH at 90 0 C to generate sodium silicate. Rhodamine B, as the fluorescent dye were added with concentration variations ranging from 0.156 mg/g to 10 mg/g.CTAB was used as template and HCl 2N was applied as gelling catalyst with aging time of 18 hours. Characterization of FSNP was measured using spectrofluorometer to identify the fluorescent intensity, fourier transform infrared (FT-IR) to determine the functional group of FSNP, BraunerEmmett-Teller (BET) adsorption to calculate the specific area of the particles, X-ray diffraction (XRD) to analyze the crystallographic phases, and transmission electron microscopy (TEM) to analyze the surface morphology of the FSNP. FT-IR and fluorescent intensity results showed that FSNP with 2.5 mg/g of rhodamine B had the optimum characteristics. The FSNP was in amorphous phase with uniform pore distribution. BET analysis showed that the specific surface of the FSNP was 190.22 m 2 /g.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"122 1","pages":"170-175"},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87670191","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 : 2020-09-22DOI: 10.21776/UB.JPACR.2020.009.03.534
D. A. Wulandari, G. Syahputra, M. Putra
The extreme development and resistance towards cancer drugs, and also the high toxicity, drug resistance and side effects of cancer chemotherapy drug triggers us to develop new drugs as one of the alternative substitutes or combinations of cancer drugs, one of the resources come from marine biodiversity especially sea cucumber. The bioactive compound from sea cucumber can inhibit cancer cell growth with the various mechanism. This study aims to analyze chemical composition, bioactive compound from sea cucumber to inhibit cancer cell line and to analyze mechanism of action of sea cucumber as anticancer with the most recent research studies. The result shows sea cucumber contained protein 44-82%, amino acid, fatty acid, collagen, peptide, micro essential. Each sea cucumber species produced the different secondary metabolites that can use as anticancer. Sea cucumbers contain triterpene glycosides, saponins, holothurin A, stichoposides, frondoside, cucumariosides, dsechinoside, fucoidan, triterpenoid aglycones (philinopgeni), non-glycosaminoglycan, sulfated glycans, sulfated polysaccharides, non-glycosaminosides) that can inhibit cancer cell line. Those bioactive compounds have a various mechanism such as apoptosis in cell line and mitochondria, antioxidative mechanism and membranolytic.
{"title":"The Bioactive Compound and Mechanism of Action of Sea Cucumber (Holothuridae) as Anticancer: A Review","authors":"D. A. Wulandari, G. Syahputra, M. Putra","doi":"10.21776/UB.JPACR.2020.009.03.534","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.03.534","url":null,"abstract":"The extreme development and resistance towards cancer drugs, and also the high toxicity, drug resistance and side effects of cancer chemotherapy drug triggers us to develop new drugs as one of the alternative substitutes or combinations of cancer drugs, one of the resources come from marine biodiversity especially sea cucumber. The bioactive compound from sea cucumber can inhibit cancer cell growth with the various mechanism. This study aims to analyze chemical composition, bioactive compound from sea cucumber to inhibit cancer cell line and to analyze mechanism of action of sea cucumber as anticancer with the most recent research studies. The result shows sea cucumber contained protein 44-82%, amino acid, fatty acid, collagen, peptide, micro essential. Each sea cucumber species produced the different secondary metabolites that can use as anticancer. Sea cucumbers contain triterpene glycosides, saponins, holothurin A, stichoposides, frondoside, cucumariosides, dsechinoside, fucoidan, triterpenoid aglycones (philinopgeni), non-glycosaminoglycan, sulfated glycans, sulfated polysaccharides, non-glycosaminosides) that can inhibit cancer cell line. Those bioactive compounds have a various mechanism such as apoptosis in cell line and mitochondria, antioxidative mechanism and membranolytic.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91221879","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.513
E. Iftitah, Rizki Wahyu Aji Wibowo, Masruroh Masruroh, K. Nisyak
Microwave-assisted synthesis of zinc oxide-silver (ZnO-Ag) nanocomposite using clove ( Syzygium aromaticum L.) oil has been investigated. Variation of solvents and irradiation time of microwave was studied. The product characterization was carried out using XRD, FT-IR, and SEM-EDS. The XRD analysis indicates ZnO-Ag nanocomposite has a polycrystalline structure. The ZnO peak was detected at 2θ = 31.99; 34.58 and 68.05, whereas the Ag peak was detected at 2θ = 38.36 and 44.49. The increasing of irradiation time reduces the crystallite size, and generally has size range between 9 and 12 nm. SEM-EDS confirmed the existence of the ZnO-Ag nanocomposite with percentage of Zn (46.89%), O (29.72%) and Ag (23.39%). Moreover, antibacterial evaluation on Staphylococcus aureus give the inhibition zone in 13.3 mm. This result slightly gives better activity than the reference.
{"title":"Green Microwave-assisted Synthesis of ZnO-Ag Nanocomposite using Clove Oil (Syzygium aromaticum L.) and Its Bioactivity against Staphylococcus aureus","authors":"E. Iftitah, Rizki Wahyu Aji Wibowo, Masruroh Masruroh, K. Nisyak","doi":"10.21776/UB.JPACR.2020.009.02.513","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.02.513","url":null,"abstract":"Microwave-assisted synthesis of zinc oxide-silver (ZnO-Ag) nanocomposite using clove ( Syzygium aromaticum L.) oil has been investigated. Variation of solvents and irradiation time of microwave was studied. The product characterization was carried out using XRD, FT-IR, and SEM-EDS. The XRD analysis indicates ZnO-Ag nanocomposite has a polycrystalline structure. The ZnO peak was detected at 2θ = 31.99; 34.58 and 68.05, whereas the Ag peak was detected at 2θ = 38.36 and 44.49. The increasing of irradiation time reduces the crystallite size, and generally has size range between 9 and 12 nm. SEM-EDS confirmed the existence of the ZnO-Ag nanocomposite with percentage of Zn (46.89%), O (29.72%) and Ag (23.39%). Moreover, antibacterial evaluation on Staphylococcus aureus give the inhibition zone in 13.3 mm. This result slightly gives better activity than the reference.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"65 1","pages":"82-90"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86389970","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.526
I. Oktavianawati, S. Arimurti, S. Suharjono
Bondowoso district is the predominant supplier of coffee beans, and also known as Republik Kopi. However, there was still insufficient data about the chemical characteristics of coffee from Bondowoso. This research has main aims to characterize the chemical characteristic of Coffea Arabica L. from Bondowoso, and determine the impact of traditional fermentation on them. Coffee beans were naturally-fermented through soaking in water for less than 12 hours. Unfermented coffee beans were used as a control. Both unfermented and fermented coffee beans were subjected to chemical analysis. Results show that total nitrogen and lipid contents of both fermented and unfermented beans decreased after fermentation into 0.19%±0.03 and 10.03%±0.14, respectively. LCMS analysis of coffee beans revealed that the majority of amino acid contents in fermented beans were higher than that found in unfermented beans, while caffeine and derivatives to be lower in fermented coffee beans than in unfermented beans. One exception for this was 7-methylxanthine, which was found only in fermented beans. Other metabolites, including procyanidines A and B, were found to decrease through fermentation. Interestingly, 3-flavanol was found only in fermented coffee beans. This research results would benefit on improving the quality of coffee through fermentation step.
{"title":"The Impacts of Traditional Fermentation Method on the Chemical Characteristics of Arabica Coffee Beans from Bondowoso District, East Java","authors":"I. Oktavianawati, S. Arimurti, S. Suharjono","doi":"10.21776/UB.JPACR.2020.009.02.526","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.02.526","url":null,"abstract":"Bondowoso district is the predominant supplier of coffee beans, and also known as Republik Kopi. However, there was still insufficient data about the chemical characteristics of coffee from Bondowoso. This research has main aims to characterize the chemical characteristic of Coffea Arabica L. from Bondowoso, and determine the impact of traditional fermentation on them. Coffee beans were naturally-fermented through soaking in water for less than 12 hours. Unfermented coffee beans were used as a control. Both unfermented and fermented coffee beans were subjected to chemical analysis. Results show that total nitrogen and lipid contents of both fermented and unfermented beans decreased after fermentation into 0.19%±0.03 and 10.03%±0.14, respectively. LCMS analysis of coffee beans revealed that the majority of amino acid contents in fermented beans were higher than that found in unfermented beans, while caffeine and derivatives to be lower in fermented coffee beans than in unfermented beans. One exception for this was 7-methylxanthine, which was found only in fermented beans. Other metabolites, including procyanidines A and B, were found to decrease through fermentation. Interestingly, 3-flavanol was found only in fermented coffee beans. This research results would benefit on improving the quality of coffee through fermentation step.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"7 1","pages":"133-141"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74243924","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.537
Rieska Dwi Widayati, T. Tanti, Erlana Nindya Maulida, Martin Luther Silubun
Synthetic cannabinoids are commonly known as Gorillas Tobacco, Hanomans Tobacco or Ganeshas Tobacco in Indonesia. Those products are camouflaged as a tobacco related to the number of smokers in Indonesia. The 5F-ADB (5F-MDMB-PINACA) has become an issue since 2016. It was undetectable by conventional drug testing methodology such as immunoassay method. GC-MS as a routine method analysis is not recommended also for detecting the metabolites from biological specimen with low concentration. The paper report LC-HRMS based method for identification of 5F-ADB and its metabolites in urine sample. Various of volume injections (1, 3, and 6 µL) was studied. Sample was acidified with concentrate of HCl, then undergo extraction with EXtrelut® Column NT3 prior to LC-HRMS analysis. The full method was operated for MS/dd-MS2 identification. The 5F-ADB and its ester hydrolysis metabolite, 5F-ADB metabolite 7 (C 19 H 27 FN 3 O 3 + ) was detected in urine sample.
{"title":"Identification of Synthetic Cannabinoid 5F-ADB (5F-MDMB-PINACA) and Its Metabolite in Urine Sample Using Liquid Chromatography – High Resolution Mass Spectrometer (LC-HRMS)","authors":"Rieska Dwi Widayati, T. Tanti, Erlana Nindya Maulida, Martin Luther Silubun","doi":"10.21776/UB.JPACR.2020.009.02.537","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.02.537","url":null,"abstract":"Synthetic cannabinoids are commonly known as Gorillas Tobacco, Hanomans Tobacco or Ganeshas Tobacco in Indonesia. Those products are camouflaged as a tobacco related to the number of smokers in Indonesia. The 5F-ADB (5F-MDMB-PINACA) has become an issue since 2016. It was undetectable by conventional drug testing methodology such as immunoassay method. GC-MS as a routine method analysis is not recommended also for detecting the metabolites from biological specimen with low concentration. The paper report LC-HRMS based method for identification of 5F-ADB and its metabolites in urine sample. Various of volume injections (1, 3, and 6 µL) was studied. Sample was acidified with concentrate of HCl, then undergo extraction with EXtrelut® Column NT3 prior to LC-HRMS analysis. The full method was operated for MS/dd-MS2 identification. The 5F-ADB and its ester hydrolysis metabolite, 5F-ADB metabolite 7 (C 19 H 27 FN 3 O 3 + ) was detected in urine sample.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"11 1","pages":"91-97"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78891976","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.518
T. Kusumaningsih, M. Wartono, Nais Puji Wijanarti
The isolation triterpenoid from Nyamplung ( Callophyllum inophyllum, Linn.) leaves has been conducted. The isolation was employed by maceration using ethanol as solvent and liquids extraction using ethyl acetate. Ethyl acetate extract was partitioned successively using nonpolar solvent with hexane, dichloromethane, and diethyl ether, respectively. The diethyl ether extract was purified by column chromatography. The isolated compound of fraction D1 was obtained as white solids crystal with yield of 0.0035%. The isolated compound was determined based on the FTIR, 1 HNMR, 13 CNMR, HSQC, and HMBC spectra. The isolated compound was identified as 28-hydroxy-3-friedelanone.
{"title":"Isolation and Elucidation Structure of 28-Hydroxy-3-Friedelanone of Nyamplung (Callophyllum inophyllum, Linn.) Leaves","authors":"T. Kusumaningsih, M. Wartono, Nais Puji Wijanarti","doi":"10.21776/UB.JPACR.2020.009.02.518","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.02.518","url":null,"abstract":"The isolation triterpenoid from Nyamplung ( Callophyllum inophyllum, Linn.) leaves has been conducted. The isolation was employed by maceration using ethanol as solvent and liquids extraction using ethyl acetate. Ethyl acetate extract was partitioned successively using nonpolar solvent with hexane, dichloromethane, and diethyl ether, respectively. The diethyl ether extract was purified by column chromatography. The isolated compound of fraction D1 was obtained as white solids crystal with yield of 0.0035%. The isolated compound was determined based on the FTIR, 1 HNMR, 13 CNMR, HSQC, and HMBC spectra. The isolated compound was identified as 28-hydroxy-3-friedelanone.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"12 4 1","pages":"117-125"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79892243","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.516
A. Azadi, Sugeng Supriyadi, H. Herawati
A biocomposite system incorporating sago starch and nano-chitosan (SS/NCS) were developed by casting and solvent evaporation method. The purpose of this experiment for characterization of the film based on sago starch (SS) with a variation of the addition of nano-chitosan (0, 2, 4, 6 and 8% by weight starch) and analyze its effect on mechanical properties, thermal properties, and morphological characteristics of mixed film (SS / NCS). Possible intermolecular interactions between SS and NCS were confirmed by Fourier-transform infrared spectroscopy (FTIR) and the reduction of crystallinity in XRD. The experimental data showed that the incorporation of nano-chitosan resulted in an increase in film solubility, tensile strength and elongation at break and a decrease in Young’s modulus. Elongation at break of the (SS/NCS) films increased with increasing of nano-chitosan concentration. The water vapor permeability (WVP) of (SS/NCS) films increased with an increase of chitosan concentration and the same tendency observed for the moisture content. Based on thermogravimetric analysis (TGA), the percentage of nano-chitosan content in starch-based films can increase thermal stability.. Scanning electron microscope (SEM) shows the surface morphology and interface of NCS/SS composite films and suggests sufficient homogenization of starch and chitosan in biodegradable composite films.
{"title":"Starch Based Biocomposite from Sago (Metroxylon sagu) with Nano-Chitosan reinforcement : Mechanical and Thermal Characteristics","authors":"A. Azadi, Sugeng Supriyadi, H. Herawati","doi":"10.21776/UB.JPACR.2020.009.02.516","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.02.516","url":null,"abstract":"A biocomposite system incorporating sago starch and nano-chitosan (SS/NCS) were developed by casting and solvent evaporation method. The purpose of this experiment for characterization of the film based on sago starch (SS) with a variation of the addition of nano-chitosan (0, 2, 4, 6 and 8% by weight starch) and analyze its effect on mechanical properties, thermal properties, and morphological characteristics of mixed film (SS / NCS). Possible intermolecular interactions between SS and NCS were confirmed by Fourier-transform infrared spectroscopy (FTIR) and the reduction of crystallinity in XRD. The experimental data showed that the incorporation of nano-chitosan resulted in an increase in film solubility, tensile strength and elongation at break and a decrease in Young’s modulus. Elongation at break of the (SS/NCS) films increased with increasing of nano-chitosan concentration. The water vapor permeability (WVP) of (SS/NCS) films increased with an increase of chitosan concentration and the same tendency observed for the moisture content. Based on thermogravimetric analysis (TGA), the percentage of nano-chitosan content in starch-based films can increase thermal stability.. Scanning electron microscope (SEM) shows the surface morphology and interface of NCS/SS composite films and suggests sufficient homogenization of starch and chitosan in biodegradable composite films.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"1 1","pages":"98-107"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79452404","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.504
A. Rosmawati, Barlah Rumhayati, A. Srihardyastutie
The increasing number of electroplating industries in this globalization era has a negative impact on the environment because of its liquid waste containing high concentrations of hexavalent chromium, Cr (VI). To overcome this problem, biochitin extracted from white shrimp shell waste ( L.vanamme ) has been used to adsorb Cr (VI) from electroplating waste. Biochitins were extracted through single and sequential fermentation method using L.plantarum and B.thuringiensis bacteria. The optimization process of Cr (VI) removal was done by using biochitin from different methods, at various mass of biochitin, the time of adsorption, and Cr (VI) concentration. Results showed that biochitin produced from the sequential fermentation method could optimally adsorb Cr (VI). By using 2 g of biochitin, Cr (VI) could be removed as much as 51.99 ± 0.41% during 6 hours. At the optimum condition, the selected adsorbent could remove Cr (VI) in the concentration range of 9.38 to 92.39 mg/L, which showed the adsorption capacity of 0.915 mg/g. The capability of biochitin for Cr (VI) removal was reinforced by the SEM EDS images, which show the presence of chromium compounds in the biochitin.
{"title":"Hexavalent Chromium Removal from Electroplating Waste Using Biochitin from L.Vanamme Shrimp Shell Waste","authors":"A. Rosmawati, Barlah Rumhayati, A. Srihardyastutie","doi":"10.21776/UB.JPACR.2020.009.02.504","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.02.504","url":null,"abstract":"The increasing number of electroplating industries in this globalization era has a negative impact on the environment because of its liquid waste containing high concentrations of hexavalent chromium, Cr (VI). To overcome this problem, biochitin extracted from white shrimp shell waste ( L.vanamme ) has been used to adsorb Cr (VI) from electroplating waste. Biochitins were extracted through single and sequential fermentation method using L.plantarum and B.thuringiensis bacteria. The optimization process of Cr (VI) removal was done by using biochitin from different methods, at various mass of biochitin, the time of adsorption, and Cr (VI) concentration. Results showed that biochitin produced from the sequential fermentation method could optimally adsorb Cr (VI). By using 2 g of biochitin, Cr (VI) could be removed as much as 51.99 ± 0.41% during 6 hours. At the optimum condition, the selected adsorbent could remove Cr (VI) in the concentration range of 9.38 to 92.39 mg/L, which showed the adsorption capacity of 0.915 mg/g. The capability of biochitin for Cr (VI) removal was reinforced by the SEM EDS images, which show the presence of chromium compounds in the biochitin.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"60 1","pages":"73-81"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76021952","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.519
T. Taher, Nyanyu Ummu Hani, N. Palapa, R. Mohadi, A. Lesbani
In this work, two synthetic layered double hydroxides (LDH) consists of Zn 2+ as M 2+ cation with different M 3+ cation, i.e., Al 3+ and Cr 3+ were used as an adsorbent for Congo Red removal aqueous solution. Both Zn-Al and Zn-Cr LDH were characterized by X-ray diffraction, FT-IR, and BET surface area analyzer. The effect of contact time, initial dye concentration, and temperature were evaluated in a batch technique in order to investigate the characteristic of Congo Red adsorption onto both adsorbents. The experimental data were assessed according to the parameter of adsorption kinetics, isotherm, and thermodynamics. The results of LDH characterization showed that Zn-Al LDH has a higher interlayer distance than Zn-Cr LDH, although Zn-Cr LDH has a higher surface area. The FT-IR analysis indicated the interlayer space of both Zn-Cr and Zn-Al LDH was dominated by CO 3 2- as the interlayer anion species. The adsorption kinetics study of Congo Red on both LDH revealed that the adsorption process followed the pseudo-second-order model. For the adsorption isotherm, the experimental data fit well with the Freundlich model rather than the Langmuir model. The thermodynamic study indicated that the adsorption process that occurred on both adsorbents was spontaneous with exothermic nature.
{"title":"A Comparative Study on The Adsorption Behavior of Congo Red on to ZnAl and ZnCr Layered Double Hydroxides","authors":"T. Taher, Nyanyu Ummu Hani, N. Palapa, R. Mohadi, A. Lesbani","doi":"10.21776/UB.JPACR.2020.009.02.519","DOIUrl":"https://doi.org/10.21776/UB.JPACR.2020.009.02.519","url":null,"abstract":"In this work, two synthetic layered double hydroxides (LDH) consists of Zn 2+ as M 2+ cation with different M 3+ cation, i.e., Al 3+ and Cr 3+ were used as an adsorbent for Congo Red removal aqueous solution. Both Zn-Al and Zn-Cr LDH were characterized by X-ray diffraction, FT-IR, and BET surface area analyzer. The effect of contact time, initial dye concentration, and temperature were evaluated in a batch technique in order to investigate the characteristic of Congo Red adsorption onto both adsorbents. The experimental data were assessed according to the parameter of adsorption kinetics, isotherm, and thermodynamics. The results of LDH characterization showed that Zn-Al LDH has a higher interlayer distance than Zn-Cr LDH, although Zn-Cr LDH has a higher surface area. The FT-IR analysis indicated the interlayer space of both Zn-Cr and Zn-Al LDH was dominated by CO 3 2- as the interlayer anion species. The adsorption kinetics study of Congo Red on both LDH revealed that the adsorption process followed the pseudo-second-order model. For the adsorption isotherm, the experimental data fit well with the Freundlich model rather than the Langmuir model. The thermodynamic study indicated that the adsorption process that occurred on both adsorbents was spontaneous with exothermic nature.","PeriodicalId":22728,"journal":{"name":"The Journal of Pure and Applied Chemistry Research","volume":"100 1","pages":"108-116"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73855465","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 : 2020-08-31DOI: 10.21776/UB.JPACR.2020.009.02.527
F. Rahmawati, D. A. N. Romadhona, Syulfi Faiz
Research to prepare NaFePO 4 cathode material from iron sand was conducted. The iron sand consists of ilmenite FeTiO 3 and hematite Fe 2 O 3 . A caustic fusion method used to precipitate iron as Fe(OH) 3 and it increased Fe content up to 94.71 %. Phosphate precipitation successfully produced trigonal FePO 4 and monoclinic FePO 4 comply with ICSD#412736 and ICSD#281079. The prepared-FePO 4 was then used as a precursor for Na insertion by applying cyclic voltammetry mode within 2.0 – 4.0 V with 0.05 mVs -1 of the scan rate. It produced orthorhombic olivine NaFePO 4 and a secondary phase of orthorhombic Na 0.7 FePO 4 . Impedance analysis at 20 Hz – 5 MHz found that the material provided a semicircle at 100 Hz peak point, indicating electrode-bulk interface with a resistance value of 1735W, comparable to the electrical conductivity of 5.36 x 10 -6 Scm -1 . Even though the conductivity value is quite lower than NaFePO 4 prepared from a commercial FePO 4 that has been conducted in our previous research, however the electrical conductivity still reliable for cathode.
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