Pub Date : 2022-11-30DOI: 10.53564/akademika.v15i1.835
Mulyadi, Ahmad Asyhadi
The information system for journalists at the Jambi Ekspres Morning Daily initially used an agenda or manual system. With the development of the organizational structure, it becomes bigger and the problem becomes even bigger if a fixed and systematic information system is not used. The change from the old system to a new system, namely a computerized system, makes work faster and produces more accurate reports to support a fast-growing organization.The author here designs an application program that uses visual basic 6.0 with a new design in terms of processing news data to make a journalist professional allowance report at the editorial secretariat of the Jambi Express Daily Morning. The author hopes that the management and secretariat of the editorial secretariat of the Jambi Express Daily Morning can optimize existing facilities to implement a more efficient and effective work system.
{"title":"SISTEM INFORMASI DATA WARTAWAN MENGGUNAKAN VISUAL BASIC 6.0. (STUDI KASUS HARIAN PAGI JAMBI EKSPRES)","authors":"Mulyadi, Ahmad Asyhadi","doi":"10.53564/akademika.v15i1.835","DOIUrl":"https://doi.org/10.53564/akademika.v15i1.835","url":null,"abstract":"The information system for journalists at the Jambi Ekspres Morning Daily initially used an agenda or manual system. With the development of the organizational structure, it becomes bigger and the problem becomes even bigger if a fixed and systematic information system is not used. The change from the old system to a new system, namely a computerized system, makes work faster and produces more accurate reports to support a fast-growing organization.The author here designs an application program that uses visual basic 6.0 with a new design in terms of processing news data to make a journalist professional allowance report at the editorial secretariat of the Jambi Express Daily Morning. The author hopes that the management and secretariat of the editorial secretariat of the Jambi Express Daily Morning can optimize existing facilities to implement a more efficient and effective work system.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86808474","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}
The extracurricular system at SMP Negeri 7 Jambi City which is currently running is still manual, that is, by means of every activity announcement, it is still notified or delivered in the school wall or directly on the school field and notification via WhatsApp group. The management of extracurricular activities makes the academic section of students experience internal problems which will make the process of managing extracurricular activities take a long time. The method used in making this system by means of data collection, system planning, system analysis, system design and database. The system built on this website uses the PHP programming language and MySQL database. The input needs on the Extracurricular Website of SMP Negeri 7 Jambi City are extracurricular data, student data, and registration data. Process requirements needed are: Login Process, Registration Process, and input, edit, and delete processes. The output data produced is in the form of information that will be attached, including: registration activity reports. The purpose of making this Job Training is the creation of an extracurricular website for SMP Negeri 7 Jambi City. With the existence of a new system that has been designed and created by researchers, it can help facilitate the parties involved in developing extracurricular activities effectively.
目前运行的SMP Negeri 7 Jambi City的课外系统仍然是手动的，即通过每次活动公告，仍然在学校墙上或直接在学校场地上通知或发送，并通过WhatsApp群通知。课外活动的管理使学生学术部门经历了内部问题，这将使课外活动管理的过程旷日持久。通过数据收集、系统规划、系统分析、系统设计和数据库的建立，阐述了本系统的开发方法。本网站所构建的系统采用PHP编程语言和MySQL数据库。SMP Negeri 7 Jambi City课外网站的输入需求是课外数据、学生数据和注册数据。所需的流程需求包括:登录流程、注册流程以及输入、编辑和删除流程。所产生的输出数据是将附加的信息形式，包括:注册活动报告。制作这个职业培训的目的是为SMP Negeri 7占碑市创建一个课外网站。有了一个由研究人员设计和创造的新系统，它可以帮助促进各方有效地开展课外活动。
{"title":"SISTEM INFORMASI MONITORING EKSTRA KURIKULER SMP NEGERI 7 KOTA JAMBI BERBASIS WEB","authors":"Lailyn Puad, Rike Limia Budiarti, Yuli Prisdawarti","doi":"10.53564/akademika.v15i1.833","DOIUrl":"https://doi.org/10.53564/akademika.v15i1.833","url":null,"abstract":"The extracurricular system at SMP Negeri 7 Jambi City which is currently running is still manual, that is, by means of every activity announcement, it is still notified or delivered in the school wall or directly on the school field and notification via WhatsApp group. The management of extracurricular activities makes the academic section of students experience internal problems which will make the process of managing extracurricular activities take a long time. The method used in making this system by means of data collection, system planning, system analysis, system design and database. The system built on this website uses the PHP programming language and MySQL database. The input needs on the Extracurricular Website of SMP Negeri 7 Jambi City are extracurricular data, student data, and registration data. Process requirements needed are: Login Process, Registration Process, and input, edit, and delete processes. The output data produced is in the form of information that will be attached, including: registration activity reports. The purpose of making this Job Training is the creation of an extracurricular website for SMP Negeri 7 Jambi City. With the existence of a new system that has been designed and created by researchers, it can help facilitate the parties involved in developing extracurricular activities effectively.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91445410","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp117-121
Irma Ragentu, S. Suherman
This study aimed to describe the student's capability of grade XI Science at SMA 3 Palu in understanding Fundamental Chemical Laws. This study was a qualitative descriptive study. The sample was students in the class XI Science 7, which amounted to 29 students, and XI Science 8, which amounted to 31 students. The sample was determined based on nonprobability sampling with a purposive technique based on the suggestions from the chemistry teacher that the two classes were homogeneous. Data were obtained from the test of students' understanding of fundamental Chemical Laws consisting of six essay questions and supported by the interview results. Respondents for the interview were six students based on the categorization of high, medium, and low scores, which were obtained from the calculation of the average score of students and standard deviation. The results showed that the capability on understanding Fundamental Chemical Laws of students of grade XI Science at SMA 3 Palu which was included in the high category was the ability to interpret as much as 79.58%, and included in the sufficient category was the ability to classify as much as 56.25%, while those included in the low category was the ability to exemplify, conclude, compare, and explain, with successive as much as 30, 24.58, 32.08, and 40.42%, respectively.
{"title":"Analysis of the Ability to Understand the Basic Law of Chemistry for Science High School Students","authors":"Irma Ragentu, S. Suherman","doi":"10.22487/j24775185.2022.v11.i2.pp117-121","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp117-121","url":null,"abstract":"This study aimed to describe the student's capability of grade XI Science at SMA 3 Palu in understanding Fundamental Chemical Laws. This study was a qualitative descriptive study. The sample was students in the class XI Science 7, which amounted to 29 students, and XI Science 8, which amounted to 31 students. The sample was determined based on nonprobability sampling with a purposive technique based on the suggestions from the chemistry teacher that the two classes were homogeneous. Data were obtained from the test of students' understanding of fundamental Chemical Laws consisting of six essay questions and supported by the interview results. Respondents for the interview were six students based on the categorization of high, medium, and low scores, which were obtained from the calculation of the average score of students and standard deviation. The results showed that the capability on understanding Fundamental Chemical Laws of students of grade XI Science at SMA 3 Palu which was included in the high category was the ability to interpret as much as 79.58%, and included in the sufficient category was the ability to classify as much as 56.25%, while those included in the low category was the ability to exemplify, conclude, compare, and explain, with successive as much as 30, 24.58, 32.08, and 40.42%, respectively.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80084359","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp129-133
R. Ratman, Nurafni Nurafni, Kasmudin Mustapa, M. R. Jura, Nurida Nurida, N. Nurasiah
This study aims to identify the percentage of misconceptions that occur in students on colloid material in class XI MIPA 2 SMA Negeri 1 Dampal Selatan Kabupaten Tolitoli is based on the results of a three-level diagnostic test and shows which subconcepts have the highest and lowest conceptions. The instrument used in this study was a three-level multiple choice diagnostic test. The results showed students' misconceptions about colloid material in class XI MIPA 2, which was 65.51%. The results of this study indicate that the level of students' misconceptions about colloidal material is a high category.
{"title":"Identification of Student Misconception using a Three-tier Diagnostic Test on Colloid","authors":"R. Ratman, Nurafni Nurafni, Kasmudin Mustapa, M. R. Jura, Nurida Nurida, N. Nurasiah","doi":"10.22487/j24775185.2022.v11.i2.pp129-133","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp129-133","url":null,"abstract":"This study aims to identify the percentage of misconceptions that occur in students on colloid material in class XI MIPA 2 SMA Negeri 1 Dampal Selatan Kabupaten Tolitoli is based on the results of a three-level diagnostic test and shows which subconcepts have the highest and lowest conceptions. The instrument used in this study was a three-level multiple choice diagnostic test. The results showed students' misconceptions about colloid material in class XI MIPA 2, which was 65.51%. The results of this study indicate that the level of students' misconceptions about colloidal material is a high category.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91453445","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp96-104
Roza Ruspita, Atika Aulia
Karangantu fishing port symbolizes the rapid fishing industry in Serang, Banten. So many activities in the Karangantu fishing port area, such as a place for landing fisherman’s boats, shipping fish catches, and tourism object. These activities may impact the water quality. This research aims to analyze the water quality and pollution index in Karangantu fishing port. The water sample was carried out by purposive sampling in three stations around the Karangantu fishing port area: the estuary area, the fish auction, and the dock. Twelve parameters were analyzed: temperature, turbidity, transparency, TDS, TSS, pH, DO, COD, nitrate, cadmium, lead, and total coliforms. The water quality analysis result was compared by Class III water classification based on PP RI Nomor 82. Water quality was determined by the pollution index based on the minister of environment decree No. 115/2003. The result indicates that the estuary area is polluted, with a PIj score of 6.35; the fish auction and the dock f are in the moderately polluted categories, with PIj scores of 4.99 and 3.90. The worse pollution can be prevented by raising public awareness about the importance of clean water and providing waste management facilities.
卡兰甘杜渔港象征着万丹市雪朗市快速发展的渔业。因此，卡兰甘杜渔港地区有许多活动，如渔民船只登陆的地方，运送渔获物，和旅游对象。这些活动可能会影响水质。本研究旨在分析卡兰甘杜渔港的水质及污染指数。在卡兰甘杜渔港附近的三个站点:河口区、鱼拍卖区和码头进行了有目的的水样采集。分析了12个参数:温度、浊度、透明度、TDS、TSS、pH、DO、COD、硝酸盐、镉、铅和总大肠菌群。采用基于PP RI Nomor 82的III类水质分类对水质分析结果进行比较。水质是根据环境部第115/2003号法令的污染指数确定的。结果表明:河口区受到污染，PIj指数为6.35;鱼类拍卖和码头f属于中度污染类别，PIj得分分别为4.99和3.90。通过提高公众对清洁水重要性的认识和提供废物管理设施，可以防止更严重的污染。
{"title":"Analysis of Water Quality and Pollution Index at Karangantu Fishing Port Area, Banten","authors":"Roza Ruspita, Atika Aulia","doi":"10.22487/j24775185.2022.v11.i2.pp96-104","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp96-104","url":null,"abstract":"Karangantu fishing port symbolizes the rapid fishing industry in Serang, Banten. So many activities in the Karangantu fishing port area, such as a place for landing fisherman’s boats, shipping fish catches, and tourism object. These activities may impact the water quality. This research aims to analyze the water quality and pollution index in Karangantu fishing port. The water sample was carried out by purposive sampling in three stations around the Karangantu fishing port area: the estuary area, the fish auction, and the dock. Twelve parameters were analyzed: temperature, turbidity, transparency, TDS, TSS, pH, DO, COD, nitrate, cadmium, lead, and total coliforms. The water quality analysis result was compared by Class III water classification based on PP RI Nomor 82. Water quality was determined by the pollution index based on the minister of environment decree No. 115/2003. The result indicates that the estuary area is polluted, with a PIj score of 6.35; the fish auction and the dock f are in the moderately polluted categories, with PIj scores of 4.99 and 3.90. The worse pollution can be prevented by raising public awareness about the importance of clean water and providing waste management facilities.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82173964","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp72-76
S. Side, S. Putri
Clay is one of the essential natural minerals in human life, especially in the industrial sector, which is widely used as a raw material for ceramics fabrication, adsorbents, and photocatalysts. The characteristics of clay significantly affect the quality of the resulting material. This study will study the aspects of natural clay in Gowa Regency, South Sulawesi Province, without the leaching process and with acid leaching. Acid leaching uses 3 M HCl, previously roasted at a temperature of 600 oC. The characterization consisted of metal oxide analysis using XRF, mineral content analysis using XRD, morphological analysis, and compound content using SEM-EDX. The results showed that the primary metal oxide content in natural clay was Fe2O3, Al2O3, and SiO2, the content of Fe2O3 decreased after the raw clay was treated with acid. The main mineral content in the sample is quartz, kaolinite, and hematite. The sample's morphology looks different after being given acid treatment; the acid leaching natural clay sample shows a porous morphology, while the natural clay without acid leaching shows the morphology in the form of lumps. The EDX mapping analysis showed that the number of impurities decreased after being given acid treatment.
粘土是人类生活中必不可少的天然矿物之一，特别是在工业领域，它被广泛用作陶瓷制造的原料、吸附剂和光催化剂。粘土的特性对最终材料的质量影响很大。本研究将研究南苏拉威西省Gowa Regency天然粘土的各个方面，没有浸出过程和酸浸。酸浸使用3 M HCl，之前在600℃的温度下烘烤。表征包括XRF分析金属氧化物、XRD分析矿物含量、形貌分析和SEM-EDX分析化合物含量。结果表明:天然粘土中主要金属氧化物为Fe2O3、Al2O3和SiO2，经酸处理后，Fe2O3含量降低;样品中主要矿物为石英、高岭石和赤铁矿。样品经酸处理后形貌不同;酸浸天然粘土样品呈多孔形态，未酸浸天然粘土样品呈块状形态。EDX作图分析表明，酸处理后杂质数量减少。
{"title":"Characterization of Natural Clay from Gowa Regency, South Sulawesi Province, Indonesia","authors":"S. Side, S. Putri","doi":"10.22487/j24775185.2022.v11.i2.pp72-76","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp72-76","url":null,"abstract":"Clay is one of the essential natural minerals in human life, especially in the industrial sector, which is widely used as a raw material for ceramics fabrication, adsorbents, and photocatalysts. The characteristics of clay significantly affect the quality of the resulting material. This study will study the aspects of natural clay in Gowa Regency, South Sulawesi Province, without the leaching process and with acid leaching. Acid leaching uses 3 M HCl, previously roasted at a temperature of 600 oC. The characterization consisted of metal oxide analysis using XRF, mineral content analysis using XRD, morphological analysis, and compound content using SEM-EDX. The results showed that the primary metal oxide content in natural clay was Fe2O3, Al2O3, and SiO2, the content of Fe2O3 decreased after the raw clay was treated with acid. The main mineral content in the sample is quartz, kaolinite, and hematite. The sample's morphology looks different after being given acid treatment; the acid leaching natural clay sample shows a porous morphology, while the natural clay without acid leaching shows the morphology in the form of lumps. The EDX mapping analysis showed that the number of impurities decreased after being given acid treatment.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72769044","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp111-116
L. Ahmad, Ulfa H. Syam, L. A. Kadir, N. Nohong, M. Natsir, Nasriadi Dali, I. Imran, Tahril Tahril, T. Azis
Heavy metal concentration exceeding the threshold amount is hazardous to the environment, so it needs some treatment. The study aimed to know the capacity and kinetics of adsorption. This study used the adsorption method to remove the heavy metal ion Ni(II) using persimmon tannin gel. Influences of time contact, pH, and ion concentration in the adsorption process were also investigated. Results showed optimum adsorption at 60 minutes of time contact and pH 5. Variation of concentration made the adsorption decrease as metal ion Ni(II) concentration increased. The maximum adsorption capacity was 23.14 mg/g by using pseudo-second-order adsorption kinetic model.
{"title":"Equilibrium and Adsorption Kinetic Study of Metal Ni(II) using Persimmon Tannin Gel","authors":"L. Ahmad, Ulfa H. Syam, L. A. Kadir, N. Nohong, M. Natsir, Nasriadi Dali, I. Imran, Tahril Tahril, T. Azis","doi":"10.22487/j24775185.2022.v11.i2.pp111-116","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp111-116","url":null,"abstract":"Heavy metal concentration exceeding the threshold amount is hazardous to the environment, so it needs some treatment. The study aimed to know the capacity and kinetics of adsorption. This study used the adsorption method to remove the heavy metal ion Ni(II) using persimmon tannin gel. Influences of time contact, pH, and ion concentration in the adsorption process were also investigated. Results showed optimum adsorption at 60 minutes of time contact and pH 5. Variation of concentration made the adsorption decrease as metal ion Ni(II) concentration increased. The maximum adsorption capacity was 23.14 mg/g by using pseudo-second-order adsorption kinetic model.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82987225","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp83-90
A. I. Agipa, Muhamad F. Muarif
This study discusses the rate of phosphate release in Silica Gel (SG) and Amino Silica Hybrid (ASH) sorbents using Lagergren pseudo-first Order Kinetic and Lagergren Pseudo-second Order Kinetic. ASH synthesis was done by adding a 3-aminopropyltriethoxysilane (APTES) modifier to sodium silicate from Lapindo Mud. Phosphate binding was carried out at 30 minutes with a stirring speed of 250 rpm. Analysis using IR spectrophotometer showed the success of ASH synthesis as indicated by the appearance of functional groups -NH2 and -CH2 at wavenumbers 1635 cm-1 and 1473 cm-1. With the continuous method, SG and ASH sorbents that have bound phosphate were then desorbed at various times of 2, 3, 4, 7, 8, and 9 days. The amount of phosphate anion released from SG and ASH was tested using a UV-Vis instrument then modeling was carried out to determine the rate of phosphate release. The desorption results showed the amount of phosphate released from the ASH sorbent was less than that of the SG sorbent. Through modeling, the proceeds of the phosphate release rate follow the Lagergren Pseudo-second Order Kinetic with an experimental QE of 0.22089 M/g for SG sorbent and 0.33333 M/g for ASH sorbent.
{"title":"Phospate Release Study on Silica Gel and Amino Silica Hybrid Sorbent from Lapindo Mud","authors":"A. I. Agipa, Muhamad F. Muarif","doi":"10.22487/j24775185.2022.v11.i2.pp83-90","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp83-90","url":null,"abstract":"This study discusses the rate of phosphate release in Silica Gel (SG) and Amino Silica Hybrid (ASH) sorbents using Lagergren pseudo-first Order Kinetic and Lagergren Pseudo-second Order Kinetic. ASH synthesis was done by adding a 3-aminopropyltriethoxysilane (APTES) modifier to sodium silicate from Lapindo Mud. Phosphate binding was carried out at 30 minutes with a stirring speed of 250 rpm. Analysis using IR spectrophotometer showed the success of ASH synthesis as indicated by the appearance of functional groups -NH2 and -CH2 at wavenumbers 1635 cm-1 and 1473 cm-1. With the continuous method, SG and ASH sorbents that have bound phosphate were then desorbed at various times of 2, 3, 4, 7, 8, and 9 days. The amount of phosphate anion released from SG and ASH was tested using a UV-Vis instrument then modeling was carried out to determine the rate of phosphate release. The desorption results showed the amount of phosphate released from the ASH sorbent was less than that of the SG sorbent. Through modeling, the proceeds of the phosphate release rate follow the Lagergren Pseudo-second Order Kinetic with an experimental QE of 0.22089 M/g for SG sorbent and 0.33333 M/g for ASH sorbent.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80243384","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp77-82
Hartarti Uminah, Ijirana Ijirana, S. Nuryanti
Varied initial concepts can be an obstacle or support in understanding a new concept. The study of changes in students' chemical concepts was carried out on thermochemical material. This study aimed to examine changes in students' thermochemical concepts in each subject of high, medium, and low ability. Qualitative descriptive research with mixed methods was conducted on SMAN 1 Bumi Raya Morowali, Central Sulawesi students. The study began by giving an initial test to all students of class XI IPA 1 and 2, as many as 60 students, to obtain initial concept data and the basis for grouping subjects on each ability criterion (high, medium, and low). Every two people from each ability group in semi-structured interviews. Thermochemical material is re-taught using a metacognitive skill learning model and given a final test and interview to get concept data after learning to assess conceptual changes. Five concepts become variables in this study: the heat of reaction, enthalpy of reaction in a calorimeter, Hess's law, energy diagrams, and bond energies. The results showed that concept changes occurred in all high, medium, and low ability subjects. Changes in students' conceptions occurred in the concepts of the heat of reaction, reaction enthalpy, calorimeter, Hess's law, energy diagrams, and bond energy. The most significant conceptual change occurred in the subject of medium ability and low ability, namely the concept of bond energy.
不同的初始概念可能是理解新概念的障碍或支持。在热化学材料上对学生化学概念的变化进行了研究。本研究旨在考察学生在高、中、低能力各科目中热化学概念的变化。采用混合方法对中苏拉威西Bumi Raya Morowali学生进行定性描述性研究。每个能力组每两个人参加半结构化面试。使用元认知技能学习模型重新教授热化学材料，并在学习后进行最终测试和访谈以获得概念数据，以评估概念变化。在这项研究中，五个概念成为变量:反应热、量热计中的反应焓、赫斯定律、能量图和键能。结果表明，所有高、中、低能力被试的概念都发生了改变。学生对反应热、反应焓、量热计、赫斯定律、能图、键能等概念的认识发生了变化。最显著的概念变化发生在中能力和低能力的主体，即键能的概念。
{"title":"Study of Conceptual Change in Chemistry for Class XI Science High School Students","authors":"Hartarti Uminah, Ijirana Ijirana, S. Nuryanti","doi":"10.22487/j24775185.2022.v11.i2.pp77-82","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp77-82","url":null,"abstract":"Varied initial concepts can be an obstacle or support in understanding a new concept. The study of changes in students' chemical concepts was carried out on thermochemical material. This study aimed to examine changes in students' thermochemical concepts in each subject of high, medium, and low ability. Qualitative descriptive research with mixed methods was conducted on SMAN 1 Bumi Raya Morowali, Central Sulawesi students. The study began by giving an initial test to all students of class XI IPA 1 and 2, as many as 60 students, to obtain initial concept data and the basis for grouping subjects on each ability criterion (high, medium, and low). Every two people from each ability group in semi-structured interviews. Thermochemical material is re-taught using a metacognitive skill learning model and given a final test and interview to get concept data after learning to assess conceptual changes. Five concepts become variables in this study: the heat of reaction, enthalpy of reaction in a calorimeter, Hess's law, energy diagrams, and bond energies. The results showed that concept changes occurred in all high, medium, and low ability subjects. Changes in students' conceptions occurred in the concepts of the heat of reaction, reaction enthalpy, calorimeter, Hess's law, energy diagrams, and bond energy. The most significant conceptual change occurred in the subject of medium ability and low ability, namely the concept of bond energy.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78851758","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 : 2022-05-30DOI: 10.22487/j24775185.2022.v11.i2.pp91-95
I. W. Wirawan, D. K. Walanda, M. Napitupulu
Nickel extraction from Morowali laterite ore has been carried out with nitric acid as the solvent. This study aims to determine the effect of nitric acid concentration, temperature, and stirring time on nickel content in laterite ore originating from Morowali. Morowali laterite seeds were extracted using the leaching method using nitric acid as the solvent with various concentrations of 0.5, 1, and 2, temperatures of 30, 60, and 95, and stirring times of 3, 6, and 12. Taguchi analysis was used in this study to obtain the effect of the three parameters used. The results showed that the optimum conditions were obtained at a concentration of 2 molars nitric acid, a temperature of 95°C, and a stirring time of 12 hours, with a nickel content of 16.469 ppm and a nickel recovery percent of 3.88%.
{"title":"Extraction of Nickel from Morowali Laterite Ore with Nitric Acid","authors":"I. W. Wirawan, D. K. Walanda, M. Napitupulu","doi":"10.22487/j24775185.2022.v11.i2.pp91-95","DOIUrl":"https://doi.org/10.22487/j24775185.2022.v11.i2.pp91-95","url":null,"abstract":"Nickel extraction from Morowali laterite ore has been carried out with nitric acid as the solvent. This study aims to determine the effect of nitric acid concentration, temperature, and stirring time on nickel content in laterite ore originating from Morowali. Morowali laterite seeds were extracted using the leaching method using nitric acid as the solvent with various concentrations of 0.5, 1, and 2, temperatures of 30, 60, and 95, and stirring times of 3, 6, and 12. Taguchi analysis was used in this study to obtain the effect of the three parameters used. The results showed that the optimum conditions were obtained at a concentration of 2 molars nitric acid, a temperature of 95°C, and a stirring time of 12 hours, with a nickel content of 16.469 ppm and a nickel recovery percent of 3.88%.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79772742","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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