Kuwait Journal of Science最新文献_第3页

Improving kernel ridge regression for medical data classification based on meta-heuristic algorithms 基于元启发式算法的医学数据分类改进核脊回归

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-19 DOI: 10.1016/j.kjs.2025.100408

Shaimaa Waleed Mahmood , Ghalya Tawfeeq Basheer , Zakariya Yahya Algamal

{"title":"Improving kernel ridge regression for medical data classification based on meta-heuristic algorithms","authors":"Shaimaa Waleed Mahmood , Ghalya Tawfeeq Basheer , Zakariya Yahya Algamal","doi":"10.1016/j.kjs.2025.100408","DOIUrl":"10.1016/j.kjs.2025.100408","url":null,"abstract":"<div><div>Kernel ridge regression (KRR) is a type of machine learning approach that integrates ridge regression with the kernel trick. However, the performance of KRR is sensitive to the values of the hyperparameters that characterize the kernel type. There is a large processing cost, memory expense, and low accuracy performance associated with the existing methods for obtaining these hyperparameter values. The development of meta-heuristic algorithms has helped in solving difficult issues. In this paper, the main improvement is included in the pelican optimization algorithm by applying elite opposite-based learning (EOBL) to improve population diversity in the search space for selecting the best hyperparameters. To confirm and validate the performance of the proposed improvement of KRR, 10 publicly available medical datasets were applied. Depending on several assessment criteria, the results demonstrated that the proposed improvement outperforms all baseline methods in terms of classification performance. The proposed approach has provided more than 92 % of overall accuracy in seven datasets. Of the three datasets, it achieved an overall result of 79 % in producing the highest classification accuracy.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100408"},"PeriodicalIF":1.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microplastics' occurrence, distribution, and chemical toxicity in backwater sediments from Puducherry Coast, Southeast India 印度东南部普杜切里海岸回水沉积物中微塑料的发生、分布和化学毒性

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-17 DOI: 10.1016/j.kjs.2025.100406

Supriya Varshini Datchanamourthy, Shailajha Natarajan, Srinivasamoorthy Krishnaraj, Vinnarasi Francis, Babu Chinnaiyan, Ponnumani Govindhan, Ramesh Kamalapathy, Gopalakrishnan Viswalingam

{"title":"Microplastics' occurrence, distribution, and chemical toxicity in backwater sediments from Puducherry Coast, Southeast India","authors":"Supriya Varshini Datchanamourthy, Shailajha Natarajan, Srinivasamoorthy Krishnaraj, Vinnarasi Francis, Babu Chinnaiyan, Ponnumani Govindhan, Ramesh Kamalapathy, Gopalakrishnan Viswalingam","doi":"10.1016/j.kjs.2025.100406","DOIUrl":"10.1016/j.kjs.2025.100406","url":null,"abstract":"<div><div>Microplastics (MPs) are degraded particles (≤5.0 mm) that originate from macro-sized plastics that significantly impact ecosystems due to their extensive fragmentation. These lighter particles, impacted by various environmental factors, become negatively buoyant and sink into sediments. In the current study, the vertical distribution of MPs from three distinct locations along the Puducherry coastal region, Ariyankuppam River Bridge (S1), Thengaithittu Fishing Harbor (S2), and Chunnambar Beach (S3), was investigated. The three sediment core samples ranging from 0 to 10 cm depth were bifurcated into five sub-samples of 2 cm intervals. The MPs exhibited a gradually decreasing abundance with increasing depth. Higher MPs were observed within the top 0–2 cm sediment samples. The average MP concentration in S<sub>1</sub>, S<sub>2</sub>, and S<sub>3</sub> sediments was 138.5 MP cm<sup>−2</sup>, 107.5 MP cm<sup>−2</sup>, and 118.0 MP cm<sup>−2</sup>, respectively. The most dominant MPs identified in sediments were fibers, fragments, and film with the major composition of polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). The MPs exhibited morphological changes, including irregular cracks, micro-brittles, pores, and erosion-like amorphous characteristics, potentially threatening marine organisms. Samples from S1 had a high pollution risk index (1,25,230) and polymeric hazards. All the sampling sites recorded a high contamination factor (CF ≥ 6) of sediments due to high levels of MPs. The present study emphasizes the need for deeper sediment sampling to gain valuable insights into MPs within global budgets.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100406"},"PeriodicalIF":1.2,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation rates of greywater in Kuwaiti residential apartments 科威特住宅公寓中灰水的产生率

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-14 DOI: 10.1016/j.kjs.2025.100405

A. Abusam, H. Abdullah, M. Khajah, F. Al-Ajeel, A. Al-Haddad

{"title":"Generation rates of greywater in Kuwaiti residential apartments","authors":"A. Abusam, H. Abdullah, M. Khajah, F. Al-Ajeel, A. Al-Haddad","doi":"10.1016/j.kjs.2025.100405","DOIUrl":"10.1016/j.kjs.2025.100405","url":null,"abstract":"<div><div>The generation rate of greywater is typically estimated from the results of questionnaire surveys that aim to obtain information about the frequency and duration of usage of sanitary appliances. However, this method is inaccurate and prone to human error. The purpose of this study is to present an innovative approach for estimating greywater generation rates from records of high-resolution flow meters used to measure household water consumption. Ultrasonic flowmeters and data loggers were installed in the main water supply pipes in bathrooms and kitchens on the roof of a three-apartment housing complex in Kuwait. Water consumption patterns were remotely monitored for nine months using data loggers that transmitted information every 5 s. The TraceWizard® software was used to break down the time series of water consumption into various usage events for toilets, showers, hand basins, and kitchen sinks based on predetermined water usage profiles (flow rates and durations). According to the results obtained, the average daily per capita water consumption was 238 L. Furthermore, black water, light greywater, and dark greywater represented 9 %, 50 %, and 34 % of the per capita water consumption, respectively. Additionally, the leaks and unclassified volumes of water used were 1 % and 6 %, respectively. Accurate information is essential for the development of successful greywater reuse projects that significantly reduce freshwater demand.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100405"},"PeriodicalIF":1.2,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143641738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extraction and characterization of cellulose nanofibers from rice husk: Potential for electrospun PVA/CNF mat composites 稻壳中纤维素纳米纤维的提取和表征：静电纺PVA/CNF复合材料的潜力

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-12 DOI: 10.1016/j.kjs.2025.100403

Mahyuni Harahap , Vivi Purwandari , Devi Andiani Zebua , Nurkholidah Daulay , Suhut Alexander Situmorang , Yurika Almanda Perangin Angin , Amanda Jiamin Ong , Jonathan Siow , Ronn Goei , Alfred ling Yoong Tok , Saharman Gea

{"title":"Extraction and characterization of cellulose nanofibers from rice husk: Potential for electrospun PVA/CNF mat composites","authors":"Mahyuni Harahap , Vivi Purwandari , Devi Andiani Zebua , Nurkholidah Daulay , Suhut Alexander Situmorang , Yurika Almanda Perangin Angin , Amanda Jiamin Ong , Jonathan Siow , Ronn Goei , Alfred ling Yoong Tok , Saharman Gea","doi":"10.1016/j.kjs.2025.100403","DOIUrl":"10.1016/j.kjs.2025.100403","url":null,"abstract":"<div><div>The current study examined the viability of synthesizing cellulose nanofibers (CNFs) from rice husk using acid hydrolysis 10 % HCl. The PVA polymer solution was enhanced with Triton x-100 as a surfactant and different amounts of CNF were introduced before the electrospinning procedure. The CNF extracted in this study had a diameter of 9.6 nm. It exhibited elongated, fibrous formations like a web, with a crystallinity level of 70 %. The negative charge from the CNF was introduced to augment the conductivity and viscosity of the rotating fluid. The Fourier transform infrared (FTIR) studies validated the interaction between PVA and CNFs throughout their mixing process. The use of CNF enhanced the thermal stability of the PVA nanofibrous composite. The PVA/CNF nanofibrous composite displayed smooth surfaces and potential for diverse medical applications, food packaging, and water purification.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100403"},"PeriodicalIF":1.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sedimentary and geochemical characterization of the sediments of the Boca Paila Lagoon system, Yucatan Peninsula, Mexico 墨西哥尤卡坦半岛Boca Paila泻湖系统沉积物的沉积和地球化学特征

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-11 DOI: 10.1016/j.kjs.2025.100394

P. Guadarrama-Guzmán , S.B. Sujitha , M.P. Jonathan , P.D. Roy , Nagarajan Ramasamy , P.F. Rodríguez-Espinosa , Laura Arreola Mendoza , Lorena Elizabeth Campos Villegas

{"title":"Sedimentary and geochemical characterization of the sediments of the Boca Paila Lagoon system, Yucatan Peninsula, Mexico","authors":"P. Guadarrama-Guzmán , S.B. Sujitha , M.P. Jonathan , P.D. Roy , Nagarajan Ramasamy , P.F. Rodríguez-Espinosa , Laura Arreola Mendoza , Lorena Elizabeth Campos Villegas","doi":"10.1016/j.kjs.2025.100394","DOIUrl":"10.1016/j.kjs.2025.100394","url":null,"abstract":"<div><div>In this paper, we investigated the Boca Paila lagoon system that comprises the Campechen (CP), Boca Paila (BP) and San Martin (SM) lagoons along the eastern coast of the Yucatan Peninsula, Mexico to document the distribution and provenance of sediments. Henceforth, forty-one surface sediment samples were collected to analyze the geochemical, petrographical, carbonate content, magnetic susceptibility, and textural parameters. The average concentration of sand was found to be 88.26 % (BP), 81.64 % (CP), and 89.47 % (SM), depicting the fact that sand predominates in shallow water bodies with moderate to high energy environments. Petrography results revealed that the sediments majorly contained micritized bioclasts and calcite crystals formed from the recrystallization of carbonate mud or the direct precipitation of calcite in quiet water environment with minimal mud winnowing within the deposition basin. The major and trace element geochemistry revealed high concentrations of Ca (33.01 %), Mg (1.33 %), and Sr (3493.51 ppm) and the mineralogy was mainly composed of calcite and aragonite. In this study, trace element concentrations followed an order of (all values in ppm): Sr (3493.51) < Rb (13.12) < U (9.49) < Y (4.91) < Cd (2.5) and Mo (2.3). Likewise, elemental ratios (Ti/K, Sr/Ca, Fe/Ca, Ca/S) indicated the biogenic origin of the sediments with low inputs of terrigenous continental weathering. Although the sand grains are predominantly limestone, they are transported from shorter distances and are chemically less mature. This study enhances our comprehension of the lagoon system and offers crucial data for geochemical surveys in regions with similar geological features.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100394"},"PeriodicalIF":1.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functionalized textile microplastics: A closer look at the issues, strategy, and legislation on the microplastic reduction 功能化纺织微塑料：近距离观察微塑料减少的问题、策略和立法

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-11 DOI: 10.1016/j.kjs.2025.100395

Aravin Prince Periyasamy

{"title":"Functionalized textile microplastics: A closer look at the issues, strategy, and legislation on the microplastic reduction","authors":"Aravin Prince Periyasamy","doi":"10.1016/j.kjs.2025.100395","DOIUrl":"10.1016/j.kjs.2025.100395","url":null,"abstract":"<div><div>The problem of microplastic pollution has become more prominent as a worldwide concern. This article provides a thorough analysis of the various routes by which microplastics originating from textiles are released into the environment, encompassing soil, air, and water. This review paper provides a succinct summary of the current use of hazardous and toxic substances (such as per polyfluoroalkyl substances (PFAS), chlorine, bromine, phosphorous, halogen-based chemicals, and various formaldehyde compounds), as well as dyes (which frequently contain heavy metals like lead, arsenic, chromium, nickel, copper, cadmium, mercury, and zinc), and nanomaterials in the textile production process. Additionally, the paper examines the role of the United Nations Environment Assembly (UNEA) and the development of its resolutions on marine plastic pollution to tackle the issue of reducing microplastics in textiles. Though there is a dearth of comprehensive coverage on this topic, this paper provides an overview of the legislative and regulatory measures implemented by different countries in response to the issue of microplastic generation and focuses on textile origin.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100395"},"PeriodicalIF":1.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Commutant properties of w-core inverses w核逆的交换性

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-05 DOI: 10.1016/j.kjs.2025.100390

Chengcheng Wang , Huihui Zhu , Julio Benítez

引用次数: 0

Investigation of the bioactive constituents of Goniothalamus wightii: Antioxidant, anti-inflammation, antimicrobial, anticancer, and molecular docking studies 夜丘丘脑生物活性成分的研究：抗氧化、抗炎、抗菌、抗癌和分子对接研究

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-04 DOI: 10.1016/j.kjs.2025.100392

Vino Palani , Balamuralikrishnan Balasubramanian , Santhosh Chinnaraj , Arunkumar Malaisamy , Viji Maluventhen , Vijaya Anand Arumugam , Wen-Chao Liu , Maruthupandian Arumugam

{"title":"Investigation of the bioactive constituents of Goniothalamus wightii: Antioxidant, anti-inflammation, antimicrobial, anticancer, and molecular docking studies","authors":"Vino Palani , Balamuralikrishnan Balasubramanian , Santhosh Chinnaraj , Arunkumar Malaisamy , Viji Maluventhen , Vijaya Anand Arumugam , Wen-Chao Liu , Maruthupandian Arumugam","doi":"10.1016/j.kjs.2025.100392","DOIUrl":"10.1016/j.kjs.2025.100392","url":null,"abstract":"<div><div>The aim of the current study was to isolate and purify the bioactive metabolite compound using <em>Goniothalamus wightii</em> leaf extracts and evaluate the antioxidant, antibacterial, antibiofilm, and <em>in vitro</em> cytotoxic activities and their <em>in-silico</em> molecular docking studies. A novel compound of 6-[(E)-2-phenylethenyl]-5,6-dihydro-2H-pyran-2-one was purified by column chromatography and characterized by fourier transform infrared spectroscopy, liquid chromatography-mass spectrum, and types and numbers of nuclei in a molecule are examined by nuclear magnetic resonance. Antioxidant activities are evaluated by 2, 2-diphenyl-1-picyrl-hydrazyl, 2ʼ, -2ʼ azino bis-(3-ethylbenzothiazoline-6-sulphonic acid, and ferric reducing power assays. The antibacterial and antibiofilm activities of active bio compounds against human pathogens by agar well diffusion methods. Cytotoxic activities of the active compound were evaluated against breast and cervical cancer cell lines by cytotoxicity assay and acridine orange/ethidium bromide staining methods. Likewise, anti-inflammatory activities have more potent inhibitory effects on human red blood cell membrane stabilization and protein denaturation assays. Further, this compound was evaluated computationally using Schrödinger software. The antimicrobial, antioxidant, and anticancer protein markers were chosen based on their activity and properties. The discovered bioactive compound synergizes and may lead to new drugs shortly. This study concluded that the 6-[(E)-2-phenylethenyl]-5,6-dihydro-2H-pyran-2-one is a moral source isolated from the natural medicinal plant for therapeutic purposes.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100392"},"PeriodicalIF":1.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping landslide vulnerability using subsurface rock elastic parameters: A case study of Lebong Regency, Bengkulu 利用地下岩石弹性参数绘制滑坡脆弱性：以Bengkulu Lebong Regency为例

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-04 DOI: 10.1016/j.kjs.2025.100393

Arif Ismul Hadi , M. Farid , Lindung Zalbuin Mase , Refrizon , Reni Mulyasari , Muhammad Afif Nabhan , Darmawan Ikhlas Fadli , Eli Putriani , Erlan Sumanjaya

{"title":"Mapping landslide vulnerability using subsurface rock elastic parameters: A case study of Lebong Regency, Bengkulu","authors":"Arif Ismul Hadi , M. Farid , Lindung Zalbuin Mase , Refrizon , Reni Mulyasari , Muhammad Afif Nabhan , Darmawan Ikhlas Fadli , Eli Putriani , Erlan Sumanjaya","doi":"10.1016/j.kjs.2025.100393","DOIUrl":"10.1016/j.kjs.2025.100393","url":null,"abstract":"<div><div>The Ketahun segment fault, a part of the Sumatran Fault that crosses through Lebong Regency in Bengkulu Province, Indonesia, has the potential to trigger on-land earthquakes, leading to landslides. Our research, conducted with utmost meticulousness, aims to map landslide potential using the Analytical Hierarchy Process (AHP). We thoroughly analyse various parameters, including rock elasticity, fault distance to measurement points, rainfall, slope and elevation, land cover, ground shear strain (GSS), the time-averaged shear wave velocity for the first 30 m depth (<em>V</em><sub><em>s30</em></sub>), peak ground acceleration (PGA), and modified Mercalli intensity (MMI). The data acquisition process involves the field survey and secondary data collection. The latter is conducted to support the analysis and input of field survey data. The field survey entailed collecting microtremor data using the Horizontal Spectral Ratio (HVSR) method. Subsequently, microtremor data recorded through the HVSR method were processed using win-MASW 5.2 HVSR software. Based on these results, we can identify areas with potential landslides based on rock elastic parameters. The landslide potential map, performed by overlaying these parameters using AHP statistical weighting, highlights the dominant influence of landslide potential stemming from the GSS value, distance of faults to the measurement points, slope gradient, and high rainfall in the study area. In regions exhibiting a high potential for landslides, it is imperative to exercise caution and prepare for disaster mitigation activities to mitigate the risk of such occurrences.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100393"},"PeriodicalIF":1.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of ZnO content on activated carbon/ZnO for enhanced acetaminophen removal under very low light intensity: Kinetics, operational variables, and radical trapping response 氧化锌含量对极弱光下活性炭/氧化锌去除对乙酰氨基酚的影响：动力学、操作变量和自由基捕获响应

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-03 DOI: 10.1016/j.kjs.2025.100391

Nurul Izzati Izhar , Zul Adlan Mohd Hir , Hartini Ahmad Rafaie , Shaari Daud

{"title":"Influence of ZnO content on activated carbon/ZnO for enhanced acetaminophen removal under very low light intensity: Kinetics, operational variables, and radical trapping response","authors":"Nurul Izzati Izhar , Zul Adlan Mohd Hir , Hartini Ahmad Rafaie , Shaari Daud","doi":"10.1016/j.kjs.2025.100391","DOIUrl":"10.1016/j.kjs.2025.100391","url":null,"abstract":"<div><div>The activated carbon-supported ZnO (AC/ZnO) photocatalyst was prepared using a simple mixing approach with varying ZnO mass ratio. The photoactivity was tested against acetaminophen (ACE) in an aqueous solution, assisted by low UVC light intensity (7 W). Characterization analyses revealed that the AC/ZnO particles mainly exhibited irregular shapes with uniform distributions and high crystallinity, and the primary oxidation state in the structure is Zn<sup>2+</sup> with standard chemical state difference of 23 eV. The band gap of the AC/ZnO composite photocatalysts decreased when AC was integrated with ZnO. Among the composite photocatalysts, higher separation efficiency was observed comparatively with a low ZnO content. Interestingly, the fabrication of AC onto ZnO appeared to contribute to a significant enhancement in photoactivity of pristine ZnO. The photodegradation of ACE by AC/ZnO (0.05:1.5) followed pseudo-first order kinetics and almost complete removal of ACE was achieved under normal conditions. The photo-induced charge carrier's excellent separation efficiency, as demonstrated by the band gap and photoluminescence spectra, was associated with the optimized activities beneath UVC irradiation<strong>.</strong> The best photocatalyst can be recycled up to five times towards ACE degradation without any regeneration step or severe deactivation.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100391"},"PeriodicalIF":1.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0