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Indonesian Journal of Chemical Science and Technology (IJCST)最新文献

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Effect of Flow Rate on Adsorption Cadmium Ion (II) Using Activated Carbon of Langsat Shell (Lansium Domesticum Corr) 流速对Langsat壳活性炭吸附镉离子的影响(ⅱ)
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2023-02-01 DOI: 10.24114/ijcst.v6i1.43175
F. Nabila, D. Kurniawati
{"title":"Effect of Flow Rate on Adsorption Cadmium Ion (II) Using Activated Carbon of Langsat Shell (Lansium Domesticum Corr)","authors":"F. Nabila, D. Kurniawati","doi":"10.24114/ijcst.v6i1.43175","DOIUrl":"https://doi.org/10.24114/ijcst.v6i1.43175","url":null,"abstract":"Cadmium is one of the dangerous heavy metals contained in industrial wastewater whose presence needs to be addressed. Adsorption is one method that can be used to reduce the levels of heavy metal ions contained in wastewater. Langsat peel activated carbon is used as an adsorbent to adsorb cadmium metal because it is easy to obtain and its use is still minimal in the community. The langsat peel was made into activated carbon with HNO3 activator as a metal ion absorber Cd2+ using the column method. The activated carbon obtained has been tested for quality according to the Indonesian National Standard (SNI) No.06-3730-1995. In this study, we determined the effect of flow rate on metal cadmium absorption. The results showed that the activated carbon met the quality standards set by SNI and the optimum value of Cd2+ metal ion adsorption was at a flow rate of 1 ml/min.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82875279","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
Effect of Adsorbent Dosage on Copper Ion Adsorption Using Activated Carbon of Langsat Shell (Lansium domesticum Corr) with Column Method 吸附剂用量对Langsat壳活性炭柱法吸附铜离子的影响
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2023-02-01 DOI: 10.24114/ijcst.v6i1.43173
Muhammad Yogi Yunanada, D. Kurniawati
{"title":"Effect of Adsorbent Dosage on Copper Ion Adsorption Using Activated Carbon of Langsat Shell (Lansium domesticum Corr) with Column Method","authors":"Muhammad Yogi Yunanada, D. Kurniawati","doi":"10.24114/ijcst.v6i1.43173","DOIUrl":"https://doi.org/10.24114/ijcst.v6i1.43173","url":null,"abstract":"Copper is one of the dangerous heavy metals contained in industrial wastewater, whose presence needs to be addressed. Adsorption is one method that can be used to adsorb heavy metals. Using a langsat shell as an adsorbent is used to adsorb copper because it is easy to obtain and its use is still minimal in people. Using the column method, the langsat shell was made into activated carbon with HNO3 as an adsorber of Cu2+ metal ions. The activated carbon obtained was tested for quality according to Standard Nasional Indonesia (SNI) No.06-3730-1995. In this research, we determine the effect of adsorbent dosage on the adsorption of copper ions. The results showed the activated carbon meets established quality standards of SNI and the optimum adsorption value of Cu2+ metal ions at an adsorbent dosage of 0.4 grams.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85375266","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
Effect of Contact Time on Biosorption of Pb(II) Metal Ions Using Biosorbent from Durian Peel (Durio zibethinus L) 接触时间对榴莲皮生物吸附剂吸附Pb(II)金属离子的影响
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2023-02-01 DOI: 10.24114/ijcst.v6i1.43174
E. Ramadhani, D. Kurniawati, F. Amelia, A. Putra
{"title":"Effect of Contact Time on Biosorption of Pb(II) Metal Ions Using Biosorbent from Durian Peel (Durio zibethinus L)","authors":"E. Ramadhani, D. Kurniawati, F. Amelia, A. Putra","doi":"10.24114/ijcst.v6i1.43174","DOIUrl":"https://doi.org/10.24114/ijcst.v6i1.43174","url":null,"abstract":"Lead metal (Pb2+) is a heavy metal that is dangerous and has high toxicity. Pb2+ metal comes from industrial waste such as electroplating, paint, and the textile industry so it can find air. An effective, efficient, and economical method to overcome air contact with the biosorption method. Pb2+ metal ion biosorption using durian peel (Durio zibethinus L) as biosorbent. The purpose of this study was to determine the optimal conditions for the absorption of Pb2+ metal ions using the batch method with variations in speed and stirring time. The results showed that the optimal condition for Pb2+ absorption occurred at a contact time of 60 minutes with an absorption capacity of 33.6163 mg/g.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75438357","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
Adsorption of Lead Ion (II) Using Activated Carbon of Langsat Shell (Lansium domesticum Corr) with Column Method Langsat壳活性炭柱法吸附铅离子(II)的研究
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2023-02-01 DOI: 10.24114/ijcst.v6i1.43178
M. Taufiq, D. Kurniawati
{"title":"Adsorption of Lead Ion (II) Using Activated Carbon of Langsat Shell (Lansium domesticum Corr) with Column Method","authors":"M. Taufiq, D. Kurniawati","doi":"10.24114/ijcst.v6i1.43178","DOIUrl":"https://doi.org/10.24114/ijcst.v6i1.43178","url":null,"abstract":"Lead (II) ion is one of the dangerous metal ions produced from various industrial wastes and its existence needs to be addressed. Adsorption using langsat peel activated carbon was proven to be able to absorb lead (II) ions. The stages of absorption are carried out by varying the adsorbent weight (0.2, 0.3, 0.4, and 0.5) g, and flow rate (1,2,3,4) mL/minute by column method then continued with testing using atomic absorption spectrophotometer (AAS). The results showed that the optimum conditions occurred at the weight of the adsorbent is 0.2 g, and the flow rate is 2 mL/min.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87401214","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
Kinetics Degradation and Shelf Life of Curcumin from Turmeric (Curcuma domestica Val) with Ethanol Extract Coated by Maltodextrin at Room Temperature Storage 麦芽糖糊精包被乙醇萃取物对姜黄中姜黄素常温降解动力学及保质期的影响
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2023-02-01 DOI: 10.24114/ijcst.v6i1.43186
J. Hardi, Ruslan Lina
{"title":"Kinetics Degradation and Shelf Life of Curcumin from Turmeric (Curcuma domestica Val) with Ethanol Extract Coated by Maltodextrin at Room Temperature Storage","authors":"J. Hardi, Ruslan Lina","doi":"10.24114/ijcst.v6i1.43186","DOIUrl":"https://doi.org/10.24114/ijcst.v6i1.43186","url":null,"abstract":"Curcumin extract from the turmeric plant is unstable to light, temperature and changes in pH, therefore it is necessary to be coated with biopolymers to have a longer shelf life. This study aims to determine the type of degradation kinetics of maltodextrin-coated curcumin and its shelf life at room temperature storage. Encapsulation was performed using an emulsion technique combined with freeze drying with the ratio of turmeric ethanol extract to maltodextrin of 7: 5 (w/w). The results showed that the efficiency of coating ethanol extract of turmeric with maltodextrin was 31.26%. Kinetics degradation of curcumin coated with maltodextrin follows zero-order reaction kinetics. Microcapsule of turmeric ethanol extract coated with maltodextrin has a shelf life at room temperature for 8.35 weeks.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86466166","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
Bioethanol Levels from Corn Cob Waste: Effect of Fermentation Time and Saccharomyces cerevisiae Yeast Amount (Zea mays) 玉米芯废弃物中生物乙醇含量:发酵时间和酵母量的影响
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-08-02 DOI: 10.24114/ijcst.v5i2.37448
Veronika Meiyuina Simatupang, R. Silaban
{"title":"Bioethanol Levels from Corn Cob Waste: Effect of Fermentation Time and Saccharomyces cerevisiae Yeast Amount (Zea mays)","authors":"Veronika Meiyuina Simatupang, R. Silaban","doi":"10.24114/ijcst.v5i2.37448","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37448","url":null,"abstract":"This study aims to determine the highest levels of bioethanol produced through the fermentation process, by looking at the effect of variations in the amount of Saccharomyces cerevisiae, immobilization, and fermentation time, as well as the effect of the amount of Saccharomyces cerevisiae and fermentation time on the ethanol content produced. The highest ethanol content was 39.5 percent in the bioethanol test, with the amount of Saccharomyces cerevisiae 8 grams and fermentation time of 9 days. The treatment given to the number of immobilized Saccharomyces cerevisiae cells and the length of time of fermentation had a major effect on the ethanol content produced, as shown by Anova.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81177846","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
Ethanol Production Comparison from Agricultural Waste of Cellulose Source Within Hydrolysis Hcl and Cellulose Enzyme 农业废弃物纤维素源水解Hcl和纤维素酶生产乙醇的比较
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-08-02 DOI: 10.24114/ijcst.v5i2.37456
Indra Masmur, Clairine Clairine, Mega Evelin Rajagukguk, Teti Purwita Sari, E. Sitinjak
{"title":"Ethanol Production Comparison from Agricultural Waste of Cellulose Source Within Hydrolysis Hcl and Cellulose Enzyme","authors":"Indra Masmur, Clairine Clairine, Mega Evelin Rajagukguk, Teti Purwita Sari, E. Sitinjak","doi":"10.24114/ijcst.v5i2.37456","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37456","url":null,"abstract":"The production of Ethanol has been utilized through the process of cellulose isolation from agricultural waste such as corn husk, rice straw and rice husk. Isolation of cellulose with pretreatment delignification using, NaOH 2% to produces cellulose of corn husk 16,6921 g (22,25%), rice straw 16,9021 g (22,53%) and rice husk 16,3691 g (21,85%) then analyzed the functional groups using FT-IR and SEM analysis. Cellulose as much as 2 g is hydrolyzed using HCl 30% and cellulase enzymes to obtain sugar that is qualitatively tested with Benedict and Tollens reagent and quantitatively tested with Luff Schoorl method and produces highest sugar content of rice husk 8,64% and 10,95%. The next stage sugar of hydrolysis will be fermented using  yeast (Saccharomyces cerevisiae) with 6 days, and then distilled at a temperature of 78-80oC. Ethanol was calculated by the potassium dichromate oxidation method to gave highest result from agricultral waste of ethanol chemical 5,97% and enzymatic 6,89% is rice husk.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78479744","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
Bioethanol Manufacturing from α-Cellulose Waste of Empty Palm Oil Frugs (Elaeis guineensis jack) with Hydrolysis Concetration Variations HCl and Cellulase Enzyme 不同水解浓度盐酸和纤维素酶对棕榈空果α-纤维素废制备生物乙醇的影响
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-08-02 DOI: 10.24114/ijcst.v5i2.37455
Indra Masmur, Herliana Herliana, Bramwell Sitompul, E. Sitinjak
{"title":"Bioethanol Manufacturing from α-Cellulose Waste of Empty Palm Oil Frugs (Elaeis guineensis jack) with Hydrolysis Concetration Variations HCl and Cellulase Enzyme","authors":"Indra Masmur, Herliana Herliana, Bramwell Sitompul, E. Sitinjak","doi":"10.24114/ijcst.v5i2.37455","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37455","url":null,"abstract":"This study uses raw materials containing lignocellulose, namely empty fruit bunches of oil palm. Oil palm empty fruit bunches were isolated to produce cellulose, hydrolyzed into simple sugars, fermented, and distilled. From the isolation of cellulose obtained α-cellulose of 19.9612 grams (26.6149%). Then it was hydrolyzed using HCl with a concentration variation of 15%; 20%; 25%; 30%; and enzymatically hydrolyzed using cellulase to produce simple sugars which were tested qualitatively with Benedict's reagent and Tollens reagent, then quantitatively tested by the Luff Schroll method. The higher the concentration of acid used, the higher the sugar will be. The best bioethanol obtained from acid hydrolysis is using 30% HCl with ethanol content of 6.54% and enzymatic 7.32%.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74092731","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
Cytotoxicity Test of Cocoa Leaf Ethanol Extract (Theobroma Cacao L.) With Brine Shrimp Lethality Test (BSLT) Method 可可叶乙醇提取物的细胞毒性试验采用卤虾致死试验(BSLT)方法
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-08-02 DOI: 10.24114/ijcst.v5i2.37452
Zulmai Rani, Ridwanto Ridwanto, Dikki Miswanda, Rafita Yuniarti, A. Sutiani, R. Syahputra, Reza Irma
{"title":"Cytotoxicity Test of Cocoa Leaf Ethanol Extract (Theobroma Cacao L.) With Brine Shrimp Lethality Test (BSLT) Method","authors":"Zulmai Rani, Ridwanto Ridwanto, Dikki Miswanda, Rafita Yuniarti, A. Sutiani, R. Syahputra, Reza Irma","doi":"10.24114/ijcst.v5i2.37452","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37452","url":null,"abstract":"Cancer is a disease characterized by uncontrolled cell division and the ability of these cells to invade other biological tissues, either by direct growth in adjacent tissues or by migration of cells to distant sites. The purpose of this study was to determine the class of secondary metabolites contained in the ethanol extract of cocoa leaves and their cytotoxicity by looking at the LC50 value using the Brine Shrimp Lethality Test (BSLT) method. This research includes phytochemical screening of ethanol extract and the BSLT method by looking at the number of deaths of Artemia salina leach larvae (LC50). The results of phytochemical screening tests showed that the cocoa leaves contained flavonoids, alkaloids, tannins, saponins, steroids, and glycosides. The cytotoxicity test with probit analysis showed an LC50 value of 269,15 µg/mL, so it was concluded that the ethanol extract of cocoa leaves was toxic and had potential as an anticancer.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77828885","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
Modification Of Natural Rubber Sir-20 With Cyclisation and Grafting Methods with Maleic Anhydride 马来酸酐环化和接枝改性天然橡胶Sir-20
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-08-02 DOI: 10.24114/ijcst.v5i2.37450
E. Eddiyanto, Andreas Nababan, A. Sinaga
{"title":"Modification Of Natural Rubber Sir-20 With Cyclisation and Grafting Methods with Maleic Anhydride","authors":"E. Eddiyanto, Andreas Nababan, A. Sinaga","doi":"10.24114/ijcst.v5i2.37450","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37450","url":null,"abstract":"Modification  has been carried out through a cyclization process using an organic solvent of Xylene in the various of concentration of P2O5 as a  Lewis Acid catalyst followed by the grafting process of Maleic Anhydride (MA) monomer using dicumyl peroxide (DCP) as the initiator. The success of the cyclization process of CNR formation can be seen from the FTIR analysis which shows typical peaks at the absorption wave of 741 cm-1 from the CH2 – CH2 cyclical strain vibration and a wavelength of 835 cm-1 from the non-cyclical strain vibration CH2 – CH2 indicating that cyclization has occurred. Furthermore, on the results of grafting, FTIR analysis was carried out to prove that the MA had been grafted on the Cyclic Natural rubber (CNR) so that the formation of CNR-g-MA as shown of the C=O wave number which was on wave number 1710 cm-1 and 1850 cm-1.  ","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86780494","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
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