Songklanakarin Journal of Science and Technology最新文献

Impact Of Mining Activities on Land Use Land Cover (Lulc) Using Geospatial Techniques in The Obuasi Municipality 基于地理空间技术的采矿活动对奥瓦西市土地利用和土地覆盖的影响

Songklanakarin Journal of Science and Technology Pub Date : 2025-09-04 DOI: 10.4314/just.v43i3.1

Samira Naa Yemoley Nsiah, Prof. Jonathan Arthur Quaye-Ballard, Jephthah Marfo Nimoh, Titus Tienaah, Kwame Obeng, Tina Dzigbordi Wemegah, Precious Adwoa Okyere

{"title":"Impact Of Mining Activities on Land Use Land Cover (Lulc) Using Geospatial Techniques in The Obuasi Municipality","authors":"Samira Naa Yemoley Nsiah, Prof. Jonathan Arthur Quaye-Ballard, Jephthah Marfo Nimoh, Titus Tienaah, Kwame Obeng, Tina Dzigbordi Wemegah, Precious Adwoa Okyere","doi":"10.4314/just.v43i3.1","DOIUrl":"https://doi.org/10.4314/just.v43i3.1","url":null,"abstract":"Introduction: Sustainable development, which balances economic, social, and environmental factors to meet the needs of the present and future generations, is a collective responsibility. Rapid population growth and intensification of socio-economic activities are causing significant changes in Land Use Land Cover (LULC), directly impacting ecosystem services, biodiversity, and climate. The Obuasi community is already facing environmental degradation and health problems due to gold mining. Methodology: The study assessed the spatial extent and intensity of mining activities in the Obuasi Municipality on the LULC and predicted future LULC changes due to mining activities using geospatial techniques. The LULC changes were analysed using Landsat satellite imagery from 1990 to 2024 using a Random Forest (RF) classifier. Results and Discussion: Mining Areas had a positive change of 27.655 km2 (18.846%) while tailing dams and flooded pits increased by 46.655 km2 (31.724%). Dense vegetation, less dense foliage, and built-up and bare land decreased by -34.692%, -8.024%, and -7.854%, respectively. These significant environmental changes show the need for effective land management strategies and geospatial techniques to monitor and mitigate adverse effects, promoting sustainable development policies and ecological resilience. Significance: The findings of this study provide valuable insights into the environmental impacts of mining, emphasising the need to make informed research and policy decisions in the field of environmental science.","PeriodicalId":21913,"journal":{"name":"Songklanakarin Journal of Science and Technology","volume":"43 3","pages":"1-22"},"PeriodicalIF":0.0,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ajol.info/index.php/just/article/download/304511/287000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147893531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Khảo sát tỉ lệ hỗn hợp cao chiết từ lá Sen, thân rễ Nghệ và thân rễ Hoàng liên nhằm nâng cao hoạt tính ức chế enzym α-amylase và lipase tuyến tụy 调查的比例高的叶子中提取出来的混合物Sen,是黄连根根茎姜黄,和亲人的活性,目的是为了提高酶的抑制α-amylase和lipase胰腺

Songklanakarin Journal of Science and Technology Pub Date : 2024-10-28 DOI: 10.55401/wgxnnz10

Lê Thị Trang, Võ Ngọc Tố Trinh, Nguyễn Đức Hoài Nam

{"title":"Khảo sát tỉ lệ hỗn hợp cao chiết từ lá Sen, thân rễ Nghệ và thân rễ Hoàng liên nhằm nâng cao hoạt tính ức chế enzym α-amylase và lipase tuyến tụy","authors":"Lê Thị Trang, Võ Ngọc Tố Trinh, Nguyễn Đức Hoài Nam","doi":"10.55401/wgxnnz10","DOIUrl":"https://doi.org/10.55401/wgxnnz10","url":null,"abstract":"Các thuốc tổng hợp như orlistat và acarbose hỗ trợ giảm cân thông qua ức chế α-amylase và lipase nhưng gây tác dụng phụ. Khảo sát tỉ lệ hỗn hợp cao chiết từ lá Sen, thân rễ Nghệ và thân rễ Hoàng liên có hoạt tính ức chế α-amylase và lipase tuyến tụy. Dùng phần mềm Design-Expert 13 và mô hình D-Optimal để thiết kế thí nghiệm với ba biến độc lập là tỉ lệ (%) các cao chiết: lá Sen (X1), thân rễ Nghệ (X2) và thân rễ Hoàng liên (X3). Các giá trị X1, X2, X3 biến thiên từ 0 % đến 100 % và X1 + X2 + X3= 100 %. Hàm mục tiêu Y1 và Y2 lần lượt là giá trị IC50 α-amylase và lipase tuyến tụy. Kết quả tỉ lệ hỗn hợp cao chiết tối ưu (X1: 58,2 %, X2: 36,6 % và X3: 5,2 %) và dự đoán Y1 = 3 μg/mL và Y2 = 8 μg/mL với α = 0,05. Kết quả kiểm chứng bằng thực nghiệm không chênh lệch nhiều với giá trị dự đoán với IC50 của α-amylase và lipase của hỗn hợp là (3,043 ± 0,074) μg/mL và (8,183 ± 0,275) μg/mL, so với acarbose (2,645 ± 0,138) μg/mL và orlistat (1,630 ± 0,004) μg/mL. Hỗn hợp cao chiết được đề xuất có hoạt tính ức chế α-amylase và lipase tốt nhất so với các nghiệm thức khảo sát.","PeriodicalId":21913,"journal":{"name":"Songklanakarin Journal of Science and Technology","volume":"7 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://jst.ntt.edu.vn/index.php/jst/article/download/507/484","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147880822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Usage of Banana Peels and Soybean Hull for the Treatment of Lake Water: Turbidity and Total Suspended Solids 香蕉皮和大豆壳在湖水处理中的应用:浊度和总悬浮物

Songklanakarin Journal of Science and Technology Pub Date : 2023-06-29 DOI: 10.30880/jst.2023.15.01.001

Nur Shahirah Mohd Aripen, N. A. Abdul Halim, Sabrina Saadon, Nur Danisya Akma Jamil

{"title":"The Usage of Banana Peels and Soybean Hull for the Treatment of Lake Water: Turbidity and Total Suspended Solids","authors":"Nur Shahirah Mohd Aripen, N. A. Abdul Halim, Sabrina Saadon, Nur Danisya Akma Jamil","doi":"10.30880/jst.2023.15.01.001","DOIUrl":"https://doi.org/10.30880/jst.2023.15.01.001","url":null,"abstract":"Lake water getcontaminate due to the growth of population and modernization which causing problems like sewage disposal has a high-volume and low-strength wastewater that can be reused for many purposes after being treated. It is crucial for wastewater to go through wastewater treatment to improves the quality of water where one of the processes involved is coagulation yet using conventional coagulant leaves excess heavy metal in the water causes in the absence of green chemistry. Chemical coagulants may have an adverse effect on the consumer and the environment such as aluminum build up in the environment, as well as have a harmful influence on the human body, resulting in Alzheimer's disease. The use of natural coagulants can be a secure replacement for chemical coagulants. Therefore, this study was conducted to reduce the usage of chemicals in the coagulation process by using natural coagulant of banana peels and soybean hulls. The main aim of this study is to investigate the effect of natural coagulant for wastewater treatment of lake water. Banana peels and soybean hulls were the main materials in making a plant-based coagulant by drying, grinding, and sieving. Jar test was carried out to investigate the effectiveness of natural coagulant by determining their turbidity and total suspended solids.It was found that banana peels perform effectively at a dosage of 400mg/L with turbidity removal achieved is almost 50%. On the other hand, soybean hulls work effectively at a dosage of 600mg/L with turbidity removal achieved is 54%. Based on the result, it is shown that using banana peels as a natural coagulant has effectively reduced the turbidity and total suspended solids of lake water with the optimum number of dosages of 600mg/L.","PeriodicalId":21913,"journal":{"name":"Songklanakarin Journal of Science and Technology","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78609152","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 Photocatalytic Activity of Green Zinc Oxide Nanoparticles in The Treatment of Aerobically Palm Oil Mill Effluent 绿色氧化锌纳米颗粒处理好氧棕榈油厂废水的光催化活性

Songklanakarin Journal of Science and Technology Pub Date : 2023-06-29 DOI: 10.30880/jst.2023.15.01.002

Dilaeleyana Abu Bakar Sidik, N. Hairom, Aniq Ikhmal Rozman, Mohamad Jauhar Shaqili Johari, Aida Muhammad

{"title":"The Photocatalytic Activity of Green Zinc Oxide Nanoparticles in The Treatment of Aerobically Palm Oil Mill Effluent","authors":"Dilaeleyana Abu Bakar Sidik, N. Hairom, Aniq Ikhmal Rozman, Mohamad Jauhar Shaqili Johari, Aida Muhammad","doi":"10.30880/jst.2023.15.01.002","DOIUrl":"https://doi.org/10.30880/jst.2023.15.01.002","url":null,"abstract":"Traditional treatment of aerobically palm oil mill effluent (A-POME) is incapable of removing the colour and organic load that does not exceed the discharge standard limit to the stream channel. Green synthesis nanoparticles (NPs) provide a significant potential for substantial performance in the photocatalytic degradation of high-strength wastewater. Therefore, the current project's goal is to investigate the photocatalytic degradation performance of A-POME in the addition of green Zinc Oxide Cymbopogon Citratus (ZnO–CC) NPs in terms of chemical oxygen demand (COD), turbidity, and colour removal. The outcomes showed that pH 8 and a ZnO-CC NPs loading of 0.3g/L was ideal for the photocatalytic degradation of A-POME with a significant percentage reduction of turbidity (68.03%), colour (48.11%), and COD (75.4%). The equilibrium data revealed a better fit Langmuir-Hinshelwood models with higher R2 and K values of 0.9906 and 0.0225, respectively. Increased ZnO–CC NPs loading in alkaline medium aided in the breakdown of A-POME pollutants by increasing the surface area accessible for UV light adsorption during the photocatalytic process. Thus, the finding from this study can assist the palm oil mill sector in improving A-POME treatment to provide high-quality treated effluent.","PeriodicalId":21913,"journal":{"name":"Songklanakarin Journal of Science and Technology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77155723","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

Rheological Study of Formate (Nacl) and Ethylene Glycol Based Drilling Fluid Using MATLAB 基于MATLAB的甲酸盐/乙二醇基钻井液流变学研究

Songklanakarin Journal of Science and Technology Pub Date : 2023-06-29 DOI: 10.30880/jst.2023.15.01.005

Bilal Sabiu, A. Bello, H.A. Adebisi

{"title":"Rheological Study of Formate (Nacl) and Ethylene Glycol Based Drilling Fluid Using MATLAB","authors":"Bilal Sabiu, A. Bello, H.A. Adebisi","doi":"10.30880/jst.2023.15.01.005","DOIUrl":"https://doi.org/10.30880/jst.2023.15.01.005","url":null,"abstract":"Non-Newtonian models are used in describing the rheology of drilling fluids. Models, such as Power Law, Bingham Plastic, and the Hershel-Buckley model are used to predict drilling fluid behaviour. Selection of the best rheological model that accurately represents the shear stress-shear rate data is optimal in determining fluid use and predicting realistic rheological behaviour. This research is aimed at studying the best rheology model to fit collected data from sodium chloride (NaCl) and ethylene glycol (EG) based drilling fluid. The assessment utilized a total of ten sets of experimental viscometry data from laboratory-formulated drilling fluid samples A to J with the varying volume of formate sodium chloride (NaCl) and ethylene glycol (EG). Using Equations relating shear rates to shear stress, MATLAB non-linear regression approach was used to determine the best of the three rheological models to fit the experimental. The Root square (R2), Adjusted Root square (Adj R2), and Root Mean Square Error (RMSE) were used in determining the goodness of fit and degree of deviation of the experimental data. data. High concentrations of both NaCl and ethylene glycols in the formulation provide a better shear rate shear stress fit. Although the ethylene glycol presence may have account for the improved fit, as Sample E, F and G despite containing high volume of the formate NaCl, the data where not effectively fitted by the models. From the results, the power law model was the least suitable with an R2 value of 0.881-0.956, Adj R2 83-96%, and a poor RSME in the range 2-9. The Herschel-Bulkley model showed an improved fit for the fluids with an R2 0.897-0.973, Adj R287- 98%, and a better RSME <3. this model also shows a good shear thinning behaviour from its three parameter consistency (n) index values. The Bingham plastic model best fits the rheology of the drilling fluid data R2 0.93-0.99, Adj R2 93-98%, and RSME of <2.","PeriodicalId":21913,"journal":{"name":"Songklanakarin Journal of Science and Technology","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90369083","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

Application of Exponentially Fitted Collocation Algorithm for Solving nth-Order Fredholm Integrodifferential Equations 指数拟合搭配算法在求解n阶Fredholm积分微分方程中的应用

Songklanakarin Journal of Science and Technology Pub Date : 2023-06-29 DOI: 10.30880/jst.2023.15.01.004

F. Iyanda, Taiwo. O. Adebayo

引用次数: 0

The Economics of Network Reconfiguration and Shunt Compensation on a 33 kV Distribution Network 33kv配电网重构与并联补偿的经济性研究

Songklanakarin Journal of Science and Technology Pub Date : 2023-06-29 DOI: 10.30880/jst.2023.15.01.003

M. Lawal, A. Olawuyi, Kayode Awomolo, A. Jimoh

引用次数: 0

Comparison of Approximate Methods for Solving Delay Differential Equations with Initial value problems 求解具有初值问题的时滞微分方程的近似方法比较

Songklanakarin Journal of Science and Technology Pub Date : 2023-02-28 DOI: 10.20428/jst.v27i2.2054

Hamood. M. Yousef, S. Alzaeemi

引用次数: 0

Land mines detection, mapping and clearance using Quadcopter in Yemen: A perspective study 也门使用四轴飞行器进行地雷探测、测绘和清除:一项远景研究

Songklanakarin Journal of Science and Technology Pub Date : 2023-02-28 DOI: 10.20428/jst.v27i2.2053

Shawqi Alwatiri, Zakarya Omar, Y. A. Algabri

引用次数: 0

Resource Allocation in Fog Computing: A Systematic Review 雾计算中的资源分配:系统综述

Songklanakarin Journal of Science and Technology Pub Date : 2023-02-28 DOI: 10.20428/jst.v27i2.2052

Asma'a Hassan Salem, Ghaleb H. Algaphari

引用次数: 1