Indonesian Chimica Letters最新文献_第2页

Synthesis of Zeolite Y from Lapindo Mud with the Comparative Variation of the Weight of NaOH/Mud and Molar SiO2/Al2O3 从Lapindo泥中合成Y型沸石，NaOH/Mud和SiO2/Al2O3摩尔数的变化比较

Indonesian Chimica Letters Pub Date : 2022-06-17 DOI: 10.19184/icl.v1i1.5

Novita Andarini, T. Haryati, S. Suwardiyanto, Yudi Aris Sulistiyo

{"title":"Synthesis of Zeolite Y from Lapindo Mud with the Comparative Variation of the Weight of NaOH/Mud and Molar SiO2/Al2O3","authors":"Novita Andarini, T. Haryati, S. Suwardiyanto, Yudi Aris Sulistiyo","doi":"10.19184/icl.v1i1.5","DOIUrl":"https://doi.org/10.19184/icl.v1i1.5","url":null,"abstract":"Lapindo mud is a waste that can be used as a zeolite formation material. Zeolite is a mineral there are silica and alumina. The zeolite synthesized was the zeolite Y. The synthesis of zeolite Y is carried out the melting method followed by hydrothermal process. The ratio of NaOH/sludge weight varied the weight of NaOH added to the sludge weight which was made constant, there were 1.1 gram of NaOH/1 gram of sludge; 1.3 gram of NaOH/1 gram of sludge; 1.5 gram of NaOH/1 gram of sludge; and 1.7 gram of NaOH/ 1 gram of sludge. The sludge was pretreated using HCl in the leaching process and NaOH for smelting. The melted sludge from the four variations was characterized using XRF. The results of characterization are used as the basis for determining the mass of SiO2 and NaOH that need to be added in the synthesis. The melted sludge was added with water, SiO2, and NaOH and cured for 48 hours at room temperature. The mixture that has been brooded is then filtered, the result of the filtering is the filtrate of sodium silicate and sodium aluminate solution. The filtrate was hydrothermal 100-105 °C for 24 hours. The resulting crystals were filtered and neutralized using aquademine. The resulting synthetic zeolite was white, then characterization was carried out using XRF and XRD. The characterization results on the variation of NaOH/sludge weight ratio could be seen from the XRF results. Zeolite Y varies the weight ratio of NaOH/sludge based on the character of the best zeolite produced at a weight ratio of NaOH/sludge 1.5.","PeriodicalId":429869,"journal":{"name":"Indonesian Chimica Letters","volume":"307 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134398950","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

Determination of Zone Degradation for Sulfide (S2-) and Ammonia (NH3) in the Leachate from TPA Pakusari (Pakusari Landfill), Jember, Using Spectrophotometric Method 用分光光度法测定帕库萨里垃圾填埋场渗滤液中硫化物(S2-)和氨(NH3)的区域降解

Indonesian Chimica Letters Pub Date : 2022-06-17 DOI: 10.19184/icl.v1i1.4

C. Wijayanti, S. Siswoyo, Mukh. Mintadi, Yeni Maulidah Muflihah

{"title":"Determination of Zone Degradation for Sulfide (S2-) and Ammonia (NH3) in the Leachate from TPA Pakusari (Pakusari Landfill), Jember, Using Spectrophotometric Method","authors":"C. Wijayanti, S. Siswoyo, Mukh. Mintadi, Yeni Maulidah Muflihah","doi":"10.19184/icl.v1i1.4","DOIUrl":"https://doi.org/10.19184/icl.v1i1.4","url":null,"abstract":"Leachate as a result from waste decomposition at landfills potentially contain toxic materials, including metals and organic matters. This leachate produces several environmental issues, including groundwater and surface water resources contamination. The landfill leachate can penetrate to the soil, blend with the soil water, flow to the soil surface, and then disembogue at the river channel. The contamination processes will vary depending on the contaminating substances and their degradation zone. Our study focused on analyzing sulfide and ammonia in the leachate. The sulfide and ammonia degradation zone have been determined by measuring the concentration of sulfide and ammonia using Spectro quant NOVA 60. The degradation zone determination ranged from the distances: 0 m, 50 m, 100 m, 150 m, and 200 m direct to the north, south, and west, and at distances of 0 m and 400 m in the east direction. The range of degradation zone based on the concentration of sulfide, ammonia, and DO (dissolved oxygen) was in a range between 150 m and 200 m from the leachate water reservoir located at TPA Pakusari (Pakusari Landfill) Jember.","PeriodicalId":429869,"journal":{"name":"Indonesian Chimica Letters","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114798559","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 pH in Coagulation Bath on Polysulfone-based Membrane Formation and Its Performance Characteristics 混凝浴pH对聚砜基膜形成及其性能的影响

Indonesian Chimica Letters Pub Date : 2022-06-17 DOI: 10.19184/icl.v1i1.6

Denik Dwi Jayanti, A. Asnawati, D. Indarti, Donatus S. Purwo Handoko, B. Piluharto

{"title":"Effect of pH in Coagulation Bath on Polysulfone-based Membrane Formation and Its Performance Characteristics","authors":"Denik Dwi Jayanti, A. Asnawati, D. Indarti, Donatus S. Purwo Handoko, B. Piluharto","doi":"10.19184/icl.v1i1.6","DOIUrl":"https://doi.org/10.19184/icl.v1i1.6","url":null,"abstract":"One of the factors that determine the formation of the membrane is the solution in the coagulation bath (non-solvent). In this study, the effect of pH treatment on the coagulation bath solution on membrane formation and its effect on membrane performance will be studied. The pH of the coagulation bath used was pH 1, 6.8 and 12. As the results, physically the three pH treatments produced the same white (opaque) membrane. Through morphological analysis, it appears that the three pH treatments produced an asymmetric membrane consisting of a top layer and a sublayer. The surface of the membrane with pH 1 treatment showed a denser surface than the pH 6.8 and pH 12 treatments. The results of the membrane performance characterization showed that the membrane permeability coefficient of the membrane with pH treatment was in the following order pH 1 < pH 12 < pH 6.8. While the value of the rejection coefficient showed that the membrane treated at pH 1 did not detect rejection because there was no permeate coming out, while at the treatment at pH 6.8 and 12, the rejection coefficient values were 74% and 76%, respectively.","PeriodicalId":429869,"journal":{"name":"Indonesian Chimica Letters","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124381509","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

Determination Kinetic Parameters of Endo-β-1,4-D-Xylanase from Abdomenal Termites with Xylan Oat and Birchwood 用木聚糖燕麦和桦木测定腹白蚁Endo-β-1,4- d木聚糖酶的动力学参数

Indonesian Chimica Letters Pub Date : 2022-06-17 DOI: 10.19184/icl.v1i1.3

Anak Agung Istri Ratnadewi, Linda Faiqotul Himmah, Tri Mulyono, Wuryanti Handayani, NG. Krishnabudi, Sudarko

引用次数: 0

Hydrogel Composite Based On Arrowroot Starch-G-Poly (Acrylamide-Co-Acrylic Acid)/Zeolite as Matrix of Controlled Release Urea Fertilizer 以竹淀粉- g -聚丙烯酰胺-共丙烯酸/沸石为基质的水凝胶复合材料控释尿素肥料

Indonesian Chimica Letters Pub Date : 2022-06-17 DOI: 10.19184/icl.v1i1.10

A. Sjaifullah, I. Winata, Ahmad Suhardiman

{"title":"Hydrogel Composite Based On Arrowroot Starch-G-Poly (Acrylamide-Co-Acrylic Acid)/Zeolite as Matrix of Controlled Release Urea Fertilizer","authors":"A. Sjaifullah, I. Winata, Ahmad Suhardiman","doi":"10.19184/icl.v1i1.10","DOIUrl":"https://doi.org/10.19184/icl.v1i1.10","url":null,"abstract":"Agricultural yields can be increased through fertilization. Conventional fertilization by spreading fertilizer on agricultural land is very ineffective. As much as 40-70% of the nitrogen from urea given through conventional fertilization will be leaching. This problem can be overcome by implementing a new fertilization system, namely by applying controlled fertilizer release technology or Control Release Fertilizer (CRF). The CRF system is made by loading or mixing urea fertilizer at the time of synthesis of a composite based on Arrowroot Starch-g-poly (acrylamide-co-acrylic acid)/zeolite. Fertilizer will come off gradually during fertilizing the land. Synthesis of starch-based hydrogel composite Arrowroot Starch-g-poly (acrylamide-co-acrylic acid)/zeolite loaded or mixed with urea fertilizer, has been successfully carried out. The composite's structure characterized by IR spectroscopy and its ability as CRF has also been tested through swelling and urea release tests in distilled water, phosphate buffer pH 5, pH 7 and pH 9. The results show that the swelling capacity and urea release in distilled water > Buffer pH 7 > pH 9 > pH 5. The welling degree in distilled water, Buffer pH 5, pH 7 and pH 9 is 39.078; 18,719; 36,296 and 33,510 g.g-1 respectively and the release of urea is 2,129; 1,829; 2,110; and 2,091 mg.mL-1 respectively and they showed significant differences.","PeriodicalId":429869,"journal":{"name":"Indonesian Chimica Letters","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127290131","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