Jurnal Teknologi最新文献_第9页

FERRIHYDRITE-CHITOSAN NANOCOMPOSITE AS A RECYCLABLE FLOCCULANT FOR PALM OIL MILL EFFLUENT 作为棕榈油厂污水可回收絮凝剂的亚铁-壳聚糖纳米复合材料

Jurnal Teknologi Pub Date : 2024-01-16 DOI: 10.11113/jurnalteknologi.v86.20187

J. Jumadi, A. Kamari, Nurulsaidah Abdul Rahim, Norjan Yusof, I. W. Sutapa, Sunardi Sunardi

{"title":"FERRIHYDRITE-CHITOSAN NANOCOMPOSITE AS A RECYCLABLE FLOCCULANT FOR PALM OIL MILL EFFLUENT","authors":"J. Jumadi, A. Kamari, Nurulsaidah Abdul Rahim, Norjan Yusof, I. W. Sutapa, Sunardi Sunardi","doi":"10.11113/jurnalteknologi.v86.20187","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20187","url":null,"abstract":"In the present study, ferrihydrite-chitosan nanocomposite (FCN) was successfully produced by co-precipitation method and used for the first time as a recyclable flocculant for pre-treatment of palm oil mill effluent (POME). The physicochemical properties of FCN were studied using Raman spectrometer, Scanning Electron Microscope (SEM) and Thermogravimetric Analyser (TGA). The feasibility of FCN to remove total suspended solids (TSS), turbidity, chemical oxygen demand (COD), and, oil and grease (O&G) from POME was investigated using a jar test method. The optimum conditions for contaminant removal from POME were determined by varying the experimental parameters such as flocculant dosage, solution pH and settling time. The results obtained showed that FCN, at a dosage of 1.5 g/L, a contact time of 60 min and pH of 5.0 gave a highest reduction of turbidity, TSS, COD and O&G levels by 72.38%, 77.32%, 71.60% and 53.40%, respectively. Besides that, FCN exhibited a better flocculation performance as compared to alum and chitosan. After three cycles of flocculation/deflocculation process, FCN retained satisfying flocculation efficiency and flocculants recovery in the range of 80-83% and 43.2-78.6%, respectively. Combination of charge neutralisation and polymer bridging was the main key mechanism of interaction between FCN and POME contaminants. The synergy effect between iron oxide/oxyhydroxide nanoparticle and chitosan has increased the physicochemical properties and flocculation performance of the FCN nanocomposite. Overall, FCN nanocomposite can be used an alternative flocculant for POME treatment.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"15 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506100","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

THE USE OF PVDF-BASED MEMBRANE FOR TREATING INDUSTRIAL WASTEWATER IN THE PERSPECTIVE OF FABRICATION TECHNIQUE AND FOULING MITIGATION VIA ADDITIVE BLENDING AND SURFACE COATING 从制造技术以及通过添加剂混合和表面涂层减少污垢的角度看使用基于 pvdf 的膜来处理工业废水

Jurnal Teknologi Pub Date : 2024-01-16 DOI: 10.11113/jurnalteknologi.v86.19389

Sri Martini, M. Mardwita, Sharmeen Afroze, Eka Sri Yusmartini, Dian Kharismadewi

{"title":"THE USE OF PVDF-BASED MEMBRANE FOR TREATING INDUSTRIAL WASTEWATER IN THE PERSPECTIVE OF FABRICATION TECHNIQUE AND FOULING MITIGATION VIA ADDITIVE BLENDING AND SURFACE COATING","authors":"Sri Martini, M. Mardwita, Sharmeen Afroze, Eka Sri Yusmartini, Dian Kharismadewi","doi":"10.11113/jurnalteknologi.v86.19389","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.19389","url":null,"abstract":"This review particularly discusses current development of PVDF (polyvinylidene fluoride)-based membrane technology for wastewater purification in terms of the potentiality, various fabrication techniques and specific fouling mitigation. Firstly, membrane technology for treating industrial wastewater and other polluted water is presented properly. In this section, essential aspects in membrane technology such as membrane usage in wastewater treatment field, fouling phenomena, fouling characteristics, and its mechanism would be explained. The second part then includes PVDF polymer, the utilization of conventional and green solvents used in membrane fabrication process as well as prominent methods available for fabricating PVDF-based membranes. Ultimately, the last section critically covers fouling mitigation efforts covering two prominent strategies namely additive blending and surface coating using novel substances as reported in current literature. Although some research related to the preparation of membrane materials has existed in the literature, there are still several challenging issues that need to be critically discussed deeper for establishing a reliable PVDF-based membrane and modifying the membrane for obtaining better properties of permeate flux, selectivity and anti-fouling leading to better membrane performance for purifying industrial wastewater containing high concentration of recalcitrant organic and inorganic pollutants. Overall, this review will considerately contribute to understand membrane fabrication and current surface modification as part of possible dependable loopholes for reducing fouling rate especially on PVDF-based membranes, and it will be a strong foundation for future research regarding the fabrication of polymeric membrane derived from PVDF having better durability and antifouling property.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"1 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506322","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

SEISMIC BEHAVIOR OF MULTI-STORIED RC BUILDING WITH RE-ENTRANT CORNER 带后倾角的多层 RC 建筑的抗震性能

Jurnal Teknologi Pub Date : 2024-01-16 DOI: 10.11113/jurnalteknologi.v86.20656

Md. Nazmul Hassan, Sharmin Reza Chowdhury, R. I. Shuvo

{"title":"SEISMIC BEHAVIOR OF MULTI-STORIED RC BUILDING WITH RE-ENTRANT CORNER","authors":"Md. Nazmul Hassan, Sharmin Reza Chowdhury, R. I. Shuvo","doi":"10.11113/jurnalteknologi.v86.20656","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20656","url":null,"abstract":"Nowadays, buildings often feature irregular floor plans for functional, aesthetic, or economic reasons. Constructing earthquake-resistant structures in seismic areas, especially with irregular shapes like re-entrant corners, poses challenges. Such corners are common when maximizing limited space is a priority. In earthquakes, re-entrant corners in structures pose major vulnerabilities, causing stress concentration and torsion problems. The main aim of this paper is to develop finite element structural analysis models of 10, 12, and 15-storied L-shaped RC buildings with a re-entrant corner under different seismic zones using equivalent static analysis (ESA) and response spectrum analysis (RSA). This research also focuses on the overall behavior of analysis results (story drift, overturning moment, base shear, etc.) with the influence of re-entrant corner. It also investigates the performance of columns and beams near re-entrant corners as the number of stories increases in different seismic zones. For the current study, ETABS V19 is used. Models consider seismic, dead, and live loads. The Bangladesh National Building Code (BNBC) 2020 is used to examine the equivalent static analysis (ESA) and the response spectrum analysis (RSA) methods. It has been concluded from the study that re-entrant corner beams consistently exhibit the highest bending moments and torsion levels across all seismic zones. Similarly, re-entrant corner columns consistently demand the most axial force and rebar when compared to similar column types. Furthermore, the study identifies maximum stress levels in re-entrant corner slabs across all seismic zones.\u0000 \u0000 \u0000 \u0000 ","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"13 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506275","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

PROTEIN INTERACTION STUDIES OF CROSS-LINKED ENDOLEVANASE AGGREGATES FROM BACILLUS LEHENSIS G1 交联内切酶 G1 聚合体的蛋白质相互作用研究

Jurnal Teknologi Pub Date : 2024-01-16 DOI: 10.11113/jurnalteknologi.v86.20888

Hotaf Hassan Makki, N. R. Jaafar, Roshanida A. Rahman, Z. Rahmat, Ni Nyoman Tri Puspaningsih, Rosli Md Illias

引用次数: 0

GELLAN GUM- AND PECTIN-MAGNETIC GRAPHENE OXIDE NANOCARRIERS LOADED WITH CINNAMALDEHYDE FOR MOSQUITO LARVAE CONTROL 载入肉桂醛的结冷胶和果胶磁性氧化石墨烯纳米载体用于控制蚊子幼虫

Jurnal Teknologi Pub Date : 2024-01-16 DOI: 10.11113/jurnalteknologi.v86.20213

S. T. S. Wong, A. Kamari, Siti Najiah Mohd Yusoff, Mohd Zobir Hussein, Hidayatulfathi Othman, S. Mustafar, Adulsman Sukkaew, Is Fatimah

{"title":"GELLAN GUM- AND PECTIN-MAGNETIC GRAPHENE OXIDE NANOCARRIERS LOADED WITH CINNAMALDEHYDE FOR MOSQUITO LARVAE CONTROL","authors":"S. T. S. Wong, A. Kamari, Siti Najiah Mohd Yusoff, Mohd Zobir Hussein, Hidayatulfathi Othman, S. Mustafar, Adulsman Sukkaew, Is Fatimah","doi":"10.11113/jurnalteknologi.v86.20213","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20213","url":null,"abstract":"\u0000\u0000\u0000\u0000Magnetic nanoparticles have evolved over the last few decades as nanocarriers in drug delivery systems for hydrophobic drugs. Here, novel gellan gum magnetic graphene oxide (GG-GO-Fe3O4) and pectin magnetic graphene oxide (PEC-GO-Fe3O4) nanocomposites were prepared to carry cinnamaldehyde to control Aedes aegypti larvae. Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM) and scanning transmission electron microscopy (STEM) were employed to investigate the physicochemical characteristics of the nanocomposites. Entrapment efficiencies and loading capacities of nanocomposites on cinnamaldehyde were examined using ultraviolet-visible analysis. The successful cinnamaldehyde loading was confirmed by C-C and C-O stretches in the FTIR spectra. Results of in vitro release study showed the capabilities of GG-GO-Fe3O4 as a drug carrier system, extending the cinnamaldehyde release period for 36 h, and the release profiles for both nanocomposites fit the Korsmeyer-Peppas kinetic model with correlation coefficient (R2) values of over 0.9809. The cinnamaldehyde-loaded GG-GO-Fe3O4 nanocomposites induced 68% mortality after 72 h of exposure, with LC50 values ranging from 2.0488 and 15.9121 mg/L. The conjugation of GO-Fe3O4 with biopolymers improved the water solubility of cinnamaldehyde by 36.41 to 62.83 times vs. free cinnamaldehyde in water (1.42 mg/mL). Overall, these results are beneficial for researchers dealing with mosquito control and prevention.\u0000\u0000\u0000\u0000","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"54 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140505670","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

THE EFFECT OF HARDENING TECHNIQUES ON WEAR RESISTANCE AND FATIGUE LIFE OF DUCTILE CAST IRON 淬火技术对球墨铸铁耐磨性和疲劳寿命的影响

Jurnal Teknologi Pub Date : 2024-01-15 DOI: 10.11113/jurnalteknologi.v86.20563

A. Y. Obaid, Riyadh A. AlSamarai, Saad R. Ahmed, Y. Al-Douri

引用次数: 0

DEVELOPMENT OF ECOFRIENDLY PLASTIC BAGS FROM BIOTHERMOPLASTIC COMPOSITE OF MODIFIED CASSAVA STARCH–GLUCOMANNAN-POLYVINYL ALCOHOL-POLYCAPROLACTONE 利用改性木薯淀粉-葡甘露聚糖-聚乙烯醇-聚己内酯的生物热塑性复合材料开发环保塑料袋

Jurnal Teknologi Pub Date : 2024-01-15 DOI: 10.11113/jurnalteknologi.v86.19963

B. A. Harsojuwono, Wayan Arnata, A. Hartiati, Ida Bagus, Wayan Gunam, Y. Setiyo

{"title":"DEVELOPMENT OF ECOFRIENDLY PLASTIC BAGS FROM BIOTHERMOPLASTIC COMPOSITE OF MODIFIED CASSAVA STARCH–GLUCOMANNAN-POLYVINYL ALCOHOL-POLYCAPROLACTONE","authors":"B. A. Harsojuwono, Wayan Arnata, A. Hartiati, Ida Bagus, Wayan Gunam, Y. Setiyo","doi":"10.11113/jurnalteknologi.v86.19963","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.19963","url":null,"abstract":"The purpose of the study was to determine the type of molding material and the sealing temperature in the formation of ecofriendly plastic bags made from a Modified Starch – Glucomannan – Polyvinyl Alcohol – Polycaprolactone (MSGPVAPCL) biothermoplastic composites. The study used a factorial randomized block design experiment. Factor 1: the type of molding material consists of Teflon and acrylic while factoring 2: the sealing temperature with levels of 90, 95, 100, 105, and 110 °C. Mechanical, physical, biological and chemical characteristics were observed. The research results show that the type of teflon molding material and the sealing temperature of 105°C gave the best characteristics of ecofriendly plastic bags with a tensile strength value of 28.62 MPa, elongation at break of 8.68%, Young's modulus 449.44 MPa, a heat seal tensile strength on the bag handle of 6.10 N, a heat seal tensile strength on the bag bottom of 4.10 N, tear strength direction longitudinally of 3.61 N, transverse tear strength of 1.78 N, WVTR of 91.23 g/m2/day, swelling of 5.31% and biodegradation time of 7.00 days, the maximum evaporation temperature of 72.43 °C, degradation temperature of 220.97 °C and a weight loss of 30.07%, a crystalline degree of 20.71% and an amorphous degree of 79.29%, a smooth longitudinal surface profile with slight waves and a transverse surface profile showing the presence of waves and fine fibers, containing functional groups O-H alcohol, C=O, C=C, C-O and (CH2)n and no heavy metals were detected. ","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"55 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140508088","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

REFORMULATED STRAIN GRADIENT (RSG) ELASTICITY THEORY FOR FREE VIBRATION OF THERMAL BI-DIRECTIONAL FG MICROBEAM 用于热双向 FG 微梁自由振动的重拟应变梯度（RSG）弹性理论

Jurnal Teknologi Pub Date : 2024-01-15 DOI: 10.11113/jurnalteknologi.v86.21047

Safa Hameed Majeed, Talib Ehraize Elaikh, Adnan Abdul-hussien Ugla

引用次数: 0

ASSESSING TROPHIC STATE AND WATER QUALITY OF SMALL LAKES AND PONDS IN PERAK 评估霹雳州小湖泊和池塘的营养状态和水质

Jurnal Teknologi Pub Date : 2024-01-15 DOI: 10.11113/jurnalteknologi.v86.20566

Z. Sharip, Mohd Hafiz Zulkifli, Mohd Nur Farhan Abd Wahab, Zubaidi Johar, Mohd Zaki Mat Amin

{"title":"ASSESSING TROPHIC STATE AND WATER QUALITY OF SMALL LAKES AND PONDS IN PERAK","authors":"Z. Sharip, Mohd Hafiz Zulkifli, Mohd Nur Farhan Abd Wahab, Zubaidi Johar, Mohd Zaki Mat Amin","doi":"10.11113/jurnalteknologi.v86.20566","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20566","url":null,"abstract":"Nowadays, the advancement in autonomous robots is the latest influenced by the development of a world surrounded by new technologies. Deep Reinforcement Learning (DRL) allows systems to operate automatically, so the robot will learn the next movement based on the interaction with the environment. Moreover, since robots require continuous action, Soft Actor Critic Deep Reinforcement Learning (SAC DRL) is considered the latest DRL approach solution. SAC is used because its ability to control continuous action to produce more accurate movements. SAC fundamental is robust against unpredictability, but some weaknesses have been identified, particularly in the exploration process for accuracy learning with faster maturity. To address this issue, the study identified a solution using a reward function appropriate for the system to guide in the learning process. This research proposes several types of reward functions based on sparse and shaping reward in SAC method to investigate the effectiveness of mobile robot learning. Finally, the experiment shows that using fusion sparse and shaping rewards in the SAC DRL successfully navigates to the target position and can also increase accuracy based on the average error result of 4.99%.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"14 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507299","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

DETERMINATION OF THE ANTIHYPERTENSIVE DRUGS CAPTOPRIL, ATENOLOL, AND METOPROLOL IN DOSAGE FORMS 测定剂型中的降压药卡托普利、阿替洛尔和美托洛尔

Jurnal Teknologi Pub Date : 2024-01-15 DOI: 10.11113/jurnalteknologi.v86.20088

Wallada H. Ibrahim, Hana Sh. Mahmood

引用次数: 0