Pub Date : 2024-06-01DOI: 10.12912/27197050/186922
Nurul Amirah Abd Aziz, Zul Adlan Mohd Hir, Wan Khaima Azira Wan Mat Khalir, Waheeba Ahmed Al-Amrani, Megat Ahmad Kamal Megat Hanafiah
The present study manufactured and utilized the chitosan-coated fumed silica composite (CS@silica) for simultaneous adsorption of rare earth elements (REEs) of Ce(III), La(III), and Nd(III) cations in an aqueous solu - tion. The CS@silica composite underwent characterization using a CHNOS analyzer, Brunauer-Emmett-Teller (BET) surface area analyzer, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectrophotom - eter, scanning electron microscope coupled with energy-dispersive X-ray (SEM-EDX) spectrophotometer, and X-ray diffraction (XRD) analyzer. The findings indicated that the CS@silica composite exhibited a lack of pores and possessed a specific surface area of 1.27 m 2 /g. Additionally, it was observed that the composite contained a significant amount of oxygen and nitrogen atoms, which serve as the active sites for the adsorption of REEs. The maximum adsorption capacities of Ce(III), La(III), and Nd(III) cations were determined under optimal experimen - tal conditions. These parameters included a pH of 4, an adsorbent dose of 0.01 g, and an equilibrium duration of 20 min. The maximum adsorption capacities for Ce(III), La(III), and Nd(III) cations were found to be 341, 241, and 299 mg/g, respectively. The adsorption kinetics followed the pseudo-second-order kinetic model. The desorption percentage of REEs-loaded CS@silica composite was significantly low when exposed to deionized water and hydrochloric acid (0.01 and 0.02 M). This suggests that there is a chemical interaction between the REEs and the active site on the surface of the composite. The predominant adsorption process proposed was complexation, with ion exchange and electrostatic contact playing a minor role. The CS@silica composite is highly promising for the recovery of REEs because of its rapid adsorption and high adsorption capacities.
{"title":"Simultaneous Adsorption of Rare Earth Metal Ions on Chitosan-coated Fumed Silica: Characterization, Kinetics, and Isotherm Studies","authors":"Nurul Amirah Abd Aziz, Zul Adlan Mohd Hir, Wan Khaima Azira Wan Mat Khalir, Waheeba Ahmed Al-Amrani, Megat Ahmad Kamal Megat Hanafiah","doi":"10.12912/27197050/186922","DOIUrl":"https://doi.org/10.12912/27197050/186922","url":null,"abstract":"The present study manufactured and utilized the chitosan-coated fumed silica composite (CS@silica) for simultaneous adsorption of rare earth elements (REEs) of Ce(III), La(III), and Nd(III) cations in an aqueous solu - tion. The CS@silica composite underwent characterization using a CHNOS analyzer, Brunauer-Emmett-Teller (BET) surface area analyzer, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectrophotom - eter, scanning electron microscope coupled with energy-dispersive X-ray (SEM-EDX) spectrophotometer, and X-ray diffraction (XRD) analyzer. The findings indicated that the CS@silica composite exhibited a lack of pores and possessed a specific surface area of 1.27 m 2 /g. Additionally, it was observed that the composite contained a significant amount of oxygen and nitrogen atoms, which serve as the active sites for the adsorption of REEs. The maximum adsorption capacities of Ce(III), La(III), and Nd(III) cations were determined under optimal experimen - tal conditions. These parameters included a pH of 4, an adsorbent dose of 0.01 g, and an equilibrium duration of 20 min. The maximum adsorption capacities for Ce(III), La(III), and Nd(III) cations were found to be 341, 241, and 299 mg/g, respectively. The adsorption kinetics followed the pseudo-second-order kinetic model. The desorption percentage of REEs-loaded CS@silica composite was significantly low when exposed to deionized water and hydrochloric acid (0.01 and 0.02 M). This suggests that there is a chemical interaction between the REEs and the active site on the surface of the composite. The predominant adsorption process proposed was complexation, with ion exchange and electrostatic contact playing a minor role. The CS@silica composite is highly promising for the recovery of REEs because of its rapid adsorption and high adsorption capacities.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231819","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 : 2024-06-01DOI: 10.12912/27197050/186683
Soukaina El Idrissi, Oumaima Zerdeb, Allal Labriki, Sakina Mehdioui, Mariyam El Omari, S. Chakiri, S. Inekach
Coastal areas, vital for local communities, are subject to significant changes requiring rigorous management. This study focused on assessing the evolution of the Atlantic coastline between Larache and Moulay Bousselham over a period of 60 years, with an emphasis on erosion and accretion risks. The main objective was to understand coastal change trends and identify the most vulnerable areas. Using advanced techniques such as multi-temporal photo interpretation, geographic information system (GIS), and the digital shoreline analysis system (DSAS), the aerial and satellite images from 1963, 1991, 2014, and 2023 were analyzed. The results reveal that zones A (Msitro Beach) and B (Lhayayda Beach) are primarily affected by erosion, with minimal accretion, while zones C (Mersat lghnem beach) and D (Moulay Bousselham Beach) exhibit more intense erosion. This study provides an original contribution by combining advanced analytical methods to inform on the sustainable management of coastal resources.
沿海地区对当地社区至关重要，但其变化很大，需要严格管理。这项研究的重点是评估拉腊什和穆莱-布塞勒姆之间的大西洋海岸线在 60 年间的演变情况，重点是侵蚀和沉积风险。主要目的是了解海岸变化趋势，确定最脆弱的地区。利用多时相判读、地理信息系统（GIS）和数字海岸线分析系统（DSAS）等先进技术，对 1963 年、1991 年、2014 年和 2023 年的航空和卫星图像进行了分析。结果显示，A 区（Msitro 海滩）和 B 区（Lhayayda 海滩）主要受侵蚀影响，只有极少量的增生，而 C 区（Mersat lghnem 海滩）和 D 区（Moulay Bousselham 海滩）则表现出更强烈的侵蚀。这项研究结合了先进的分析方法，为沿海资源的可持续管理提供了信息，具有独创性。
{"title":"Diachronic Study of the North Atlantic Coast of Morocco between Larache and Moulay Bousselham: A Geometric Approach","authors":"Soukaina El Idrissi, Oumaima Zerdeb, Allal Labriki, Sakina Mehdioui, Mariyam El Omari, S. Chakiri, S. Inekach","doi":"10.12912/27197050/186683","DOIUrl":"https://doi.org/10.12912/27197050/186683","url":null,"abstract":"Coastal areas, vital for local communities, are subject to significant changes requiring rigorous management. This study focused on assessing the evolution of the Atlantic coastline between Larache and Moulay Bousselham over a period of 60 years, with an emphasis on erosion and accretion risks. The main objective was to understand coastal change trends and identify the most vulnerable areas. Using advanced techniques such as multi-temporal photo interpretation, geographic information system (GIS), and the digital shoreline analysis system (DSAS), the aerial and satellite images from 1963, 1991, 2014, and 2023 were analyzed. The results reveal that zones A (Msitro Beach) and B (Lhayayda Beach) are primarily affected by erosion, with minimal accretion, while zones C (Mersat lghnem beach) and D (Moulay Bousselham Beach) exhibit more intense erosion. This study provides an original contribution by combining advanced analytical methods to inform on the sustainable management of coastal resources.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"20 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233977","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 : 2024-06-01DOI: 10.12912/27197050/187227
Víctor Sánchez-Araujo, Marcelo Portuguez-Maurtua, P. Palomino-Pastrana, Mabel Escobar-Soldevilla, Wilfredo Sáez Huamán, Elmer Chávez-Araujo, José Antonio Llahuilla-Quea, Rommel Luis López-Alvarado, Yuli Anabel Chávez-Juanito, Eliana Contreras López
Water quality in rivers is affected as it passes through urban areas; this situation can be improved with good man - agement of water resources. High Andean rivers require further studies to indicate their quality status. In addition, it is important to estimate the health risks associated with exposure to contaminants in the river water. Therefore, it is proposed to assess the water quality index (WQI) using the National Sanitation Foundation (NSF) model and the health risks in the urban section of the Ichu River in Peru. Six monitoring points were selected in the section of the Ichu River that includes the urbanized part of the city of Huancavelica. The sample was taken during the months of February to April 2021. Critical parameters were analyzed by multivariate statistical analysis as principal components and cluster test. In addition, Pearson’s correlation test was performed, and the water quality status was evaluated using the WQI-NSF model. The Ichu River was of “bad” quality, unfit for human consumption, and confirming the impact of the population on water quality. The WQI-NSF model could be useful for high Andean watercourses suffering from anthropogenic deterioration of quality, with illegal effluent discharges and poor sanitation. There is a high health risk due to fecal coliform contamination from sewage discharges into the river. In addition, the total hazard index indicated that contaminants are causing negative health effects in adult males at a low risk level (risk 2), adult females at a moderate risk level (risk 3), and children at a negligible risk level (risk 1). With the help of this study, an appropriate management plan can be put in place to restore the ecological integrity of the Ichu River.
{"title":"Water Quality Index and Health Risks in a Peruvian High Andean River","authors":"Víctor Sánchez-Araujo, Marcelo Portuguez-Maurtua, P. Palomino-Pastrana, Mabel Escobar-Soldevilla, Wilfredo Sáez Huamán, Elmer Chávez-Araujo, José Antonio Llahuilla-Quea, Rommel Luis López-Alvarado, Yuli Anabel Chávez-Juanito, Eliana Contreras López","doi":"10.12912/27197050/187227","DOIUrl":"https://doi.org/10.12912/27197050/187227","url":null,"abstract":"Water quality in rivers is affected as it passes through urban areas; this situation can be improved with good man - agement of water resources. High Andean rivers require further studies to indicate their quality status. In addition, it is important to estimate the health risks associated with exposure to contaminants in the river water. Therefore, it is proposed to assess the water quality index (WQI) using the National Sanitation Foundation (NSF) model and the health risks in the urban section of the Ichu River in Peru. Six monitoring points were selected in the section of the Ichu River that includes the urbanized part of the city of Huancavelica. The sample was taken during the months of February to April 2021. Critical parameters were analyzed by multivariate statistical analysis as principal components and cluster test. In addition, Pearson’s correlation test was performed, and the water quality status was evaluated using the WQI-NSF model. The Ichu River was of “bad” quality, unfit for human consumption, and confirming the impact of the population on water quality. The WQI-NSF model could be useful for high Andean watercourses suffering from anthropogenic deterioration of quality, with illegal effluent discharges and poor sanitation. There is a high health risk due to fecal coliform contamination from sewage discharges into the river. In addition, the total hazard index indicated that contaminants are causing negative health effects in adult males at a low risk level (risk 2), adult females at a moderate risk level (risk 3), and children at a negligible risk level (risk 1). With the help of this study, an appropriate management plan can be put in place to restore the ecological integrity of the Ichu River.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"12 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141229713","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 : 2024-06-01DOI: 10.12912/27197050/187209
Maria Ulfah, Imelda Nurjanah Ziliwu, Sri Agustina, C. Octavina, Khairunnisa Khairunnisa, Mathinee Yucharoen
Microplastics are plastic fragments measuring < 5 mm, microplastics that enter the water can damage the growth of coral reefs. The aim of this research is to obtain accurate data on the distribution of microplastics, as an initial step in conservation and mitigation of the impact of plastic waste pollution in the Ujong Pancu area. Sediment samples were taken using coring method. Microplastic identification was carried out at the Marine Chemistry Laboratory, Faculty of Maritime Affairs and Fisheries, Syiah Kuala University using a binocular microscope with zig-zag pattern identification. The results of this study are that there are three types of microplastic found in Ujong Pancu waters, namely fiber, film, and fragment types. The average abundance of microplastics in Ujong Pancu Waters ranges from 32–68 particles/kg. The highest average abundance of microplastics is in the north-western part of Pulau Tuan and the lowest is in Lhok Mata Ie Beach. The highest type of microplastic found was film and the lowest type of microplastic found was fiber. The condition of coral reefs in Ujong Pancu waters is in the moderate category. The relationship between microplastic abundance and the percentage of live coral cover and environmental parameters was 85.01%.
{"title":"Microplastic Accumulation in Coral Reef Ecosystems at Peukan Bada District, Aceh Besar","authors":"Maria Ulfah, Imelda Nurjanah Ziliwu, Sri Agustina, C. Octavina, Khairunnisa Khairunnisa, Mathinee Yucharoen","doi":"10.12912/27197050/187209","DOIUrl":"https://doi.org/10.12912/27197050/187209","url":null,"abstract":"Microplastics are plastic fragments measuring < 5 mm, microplastics that enter the water can damage the growth of coral reefs. The aim of this research is to obtain accurate data on the distribution of microplastics, as an initial step in conservation and mitigation of the impact of plastic waste pollution in the Ujong Pancu area. Sediment samples were taken using coring method. Microplastic identification was carried out at the Marine Chemistry Laboratory, Faculty of Maritime Affairs and Fisheries, Syiah Kuala University using a binocular microscope with zig-zag pattern identification. The results of this study are that there are three types of microplastic found in Ujong Pancu waters, namely fiber, film, and fragment types. The average abundance of microplastics in Ujong Pancu Waters ranges from 32–68 particles/kg. The highest average abundance of microplastics is in the north-western part of Pulau Tuan and the lowest is in Lhok Mata Ie Beach. The highest type of microplastic found was film and the lowest type of microplastic found was fiber. The condition of coral reefs in Ujong Pancu waters is in the moderate category. The relationship between microplastic abundance and the percentage of live coral cover and environmental parameters was 85.01%.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"80 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231006","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 : 2024-06-01DOI: 10.12912/27197050/187041
Altin Dreshaj, Nimet Orqusha, Violeta Berlajolli, Arben Osmanaj
The study of soil physico-chemical properties is an important field related to the aspect of climate change and the storage of organic carbon in soil. This field of scientific research aims to identify the impact of land management practices on the physico-chemical parameters of soil composition. This study is based on laboratory analysis and various observations of various soil physicochemical parameters, such as pH-H 2 O, electrical conductivity (EC), organic matter (OM), soil organic carbon (SOC), SOC t/ha, and specific gravity (BD) g/cm 3 . This study helps develop strategies to implement improved land management sustainably. The soil specific gravity averages 1.38 g/ cm³, with low variability (Std. Dev. = 0.03337), the coefficient of variation (CV) is 2.410378%, indicating a low variation about the mean, while the skewness is negative (-0.78464), while the kurtosis is positive (1.766186). Some of the differences (OM, SOC, SOC t/ha) have a high variability, while others have a lower variability (EC μS/cm, pH 1:2.5, BD g/cm³). This may indicate that some soil characteristics are more stable, while others have a higher degree of variability.
{"title":"Quality Assessment Through Land Use Change, Land Surface Temperature - An Environmental Factors Analysis","authors":"Altin Dreshaj, Nimet Orqusha, Violeta Berlajolli, Arben Osmanaj","doi":"10.12912/27197050/187041","DOIUrl":"https://doi.org/10.12912/27197050/187041","url":null,"abstract":"The study of soil physico-chemical properties is an important field related to the aspect of climate change and the storage of organic carbon in soil. This field of scientific research aims to identify the impact of land management practices on the physico-chemical parameters of soil composition. This study is based on laboratory analysis and various observations of various soil physicochemical parameters, such as pH-H 2 O, electrical conductivity (EC), organic matter (OM), soil organic carbon (SOC), SOC t/ha, and specific gravity (BD) g/cm 3 . This study helps develop strategies to implement improved land management sustainably. The soil specific gravity averages 1.38 g/ cm³, with low variability (Std. Dev. = 0.03337), the coefficient of variation (CV) is 2.410378%, indicating a low variation about the mean, while the skewness is negative (-0.78464), while the kurtosis is positive (1.766186). Some of the differences (OM, SOC, SOC t/ha) have a high variability, while others have a lower variability (EC μS/cm, pH 1:2.5, BD g/cm³). This may indicate that some soil characteristics are more stable, while others have a higher degree of variability.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"23 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233375","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 : 2024-06-01DOI: 10.12912/27197050/186598
M. Madhusudhan, A.V. Shivapur, J.H. Surendra
To formulate an effective growth management plan, it is imperative to comprehend the dynamic changes that transpire. This study focused on identifying such shifts spanning four decades, from 1990 to 2020, and utilized a GIS-integrated approach, employing cellular automata Markov chain model within TerrSet software for the MRBC area, to predict land use and land cover (LULC) for 2030. The accuracy evaluation of the classification method yielded overall accuracy percentages of 94.11%, 94.11%, 90.19%, and 94.12% for 1990, 2000, 2010, and 2020, respectively, accompanied by Kappa values of 0.921, 0.921, 0.895 and 0.922. The LULC map for 2020 was forecasted and compared to the actual map for validation, revealing a discrepancy of less than 5% in class distribution. The study findings indicated a 12.32% reduction in agricultural land (151.7 km 2 ) compared to the 1990 LULC map in the projected 2030 map. In this future scenario, the converted region is allocated to urban and barren land classes. Consequently, decision-makers are urged to take necessary measures to preserve agricultural land from conversion, ensuring the enduring sustainability of agriculture.
{"title":"Forecasting Land Use and Land Cover Changes in the Malaprabha Right Bank Canal Command Area through Cellular Automata and Markov Chain Modeling","authors":"M. Madhusudhan, A.V. Shivapur, J.H. Surendra","doi":"10.12912/27197050/186598","DOIUrl":"https://doi.org/10.12912/27197050/186598","url":null,"abstract":"To formulate an effective growth management plan, it is imperative to comprehend the dynamic changes that transpire. This study focused on identifying such shifts spanning four decades, from 1990 to 2020, and utilized a GIS-integrated approach, employing cellular automata Markov chain model within TerrSet software for the MRBC area, to predict land use and land cover (LULC) for 2030. The accuracy evaluation of the classification method yielded overall accuracy percentages of 94.11%, 94.11%, 90.19%, and 94.12% for 1990, 2000, 2010, and 2020, respectively, accompanied by Kappa values of 0.921, 0.921, 0.895 and 0.922. The LULC map for 2020 was forecasted and compared to the actual map for validation, revealing a discrepancy of less than 5% in class distribution. The study findings indicated a 12.32% reduction in agricultural land (151.7 km 2 ) compared to the 1990 LULC map in the projected 2030 map. In this future scenario, the converted region is allocated to urban and barren land classes. Consequently, decision-makers are urged to take necessary measures to preserve agricultural land from conversion, ensuring the enduring sustainability of agriculture.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"52 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141232323","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 : 2024-06-01DOI: 10.12912/27197050/187771
Jana Renuka, Konda Rajasekhar
Rapid face of urbanization has lead to increase in concrete production, rising concerns about its implications for climate change, depletion of resource materials and environmental degradation. Concrete is prone to attacks by various aggressive environment effects. Depending upon the requirements, different types of concrete have been developed using nano based materials. One of the most used materials at nano scale is nano silica. The effect of use of nano silica in the form of colloidal silica is used in the present study as replacement and addition to cement to study the sulphuric acid attack on concrete. Colloidal silica with 30% of nano solids of SYCOL-TX is replaced and added to cement in different proportions i.e., 0, 0.5, 1, 1.5, 2, 2.5 and 3% respectively. Optimum mix is found out by conducting compressive strength test to concrete specimens after 28 days of curing. The test samples prepared with optimum content of colloidal silica are immersed in different concentrations of 1.5, 3, 4.5 and 6% sul - phuric acid solution for a time period of 28, 56, 90 and 180 days, after 28 days of water curing. Visual appearance, weight loss and compressive strength lossare determined in the study to study the effect of sulphuric acid attackon concrete specimens. From the results it is observed that incorporation of colloidal silica in concrete enhances its compressive strength and resistance to acidic environments in terms of durability.
{"title":"Studies on Effect of Sulphuric Acid Attack on Concrete Made with Colloidal Silica as Replacement and Addition to Cement","authors":"Jana Renuka, Konda Rajasekhar","doi":"10.12912/27197050/187771","DOIUrl":"https://doi.org/10.12912/27197050/187771","url":null,"abstract":"Rapid face of urbanization has lead to increase in concrete production, rising concerns about its implications for climate change, depletion of resource materials and environmental degradation. Concrete is prone to attacks by various aggressive environment effects. Depending upon the requirements, different types of concrete have been developed using nano based materials. One of the most used materials at nano scale is nano silica. The effect of use of nano silica in the form of colloidal silica is used in the present study as replacement and addition to cement to study the sulphuric acid attack on concrete. Colloidal silica with 30% of nano solids of SYCOL-TX is replaced and added to cement in different proportions i.e., 0, 0.5, 1, 1.5, 2, 2.5 and 3% respectively. Optimum mix is found out by conducting compressive strength test to concrete specimens after 28 days of curing. The test samples prepared with optimum content of colloidal silica are immersed in different concentrations of 1.5, 3, 4.5 and 6% sul - phuric acid solution for a time period of 28, 56, 90 and 180 days, after 28 days of water curing. Visual appearance, weight loss and compressive strength lossare determined in the study to study the effect of sulphuric acid attackon concrete specimens. From the results it is observed that incorporation of colloidal silica in concrete enhances its compressive strength and resistance to acidic environments in terms of durability.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"2 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141230290","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 present research explored the antioxidant capacities and phytochemical profile of Cistus ladanifer collected from North Morocco (Tangier), to identify potential medicinal sources of antioxidants. The antioxidant qualities of the extracts were assessed using a variety of analytical methods, such as 2,2-Diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and oxygen radical absorbance capacity (ORAC). Fourier transform infrared (FTIR) spectroscopy, gas chromatography-mass spectrometry (GC-MS), and high-performance liquid chromatography (HPLC) were employed to examine the chemical constituents present in the plant material. Finally, ICP-AES analysis was performed to characterize the nutritional components of the extract, providing detailed insights into its valuable nutrient content. The findings revealed that the methanolic extract displayed considerable antioxidant potential, as evidenced by its powerful scavenging activities against DPPH, with an IC 50 value of 0.115 ± 0.003 mg/ml and IC 50 of 0.251 ± 0.006 mg/ml ABTS radicals. Moreover, it displayed a higher reducing power using the FRAP test and excellent ORAC values, with 62.74 ± 0.07 mg/g and 40.21 ± 0.7 mg/g dry weight of extract, respectively. This research also assessed the total phenolic and total flavonoid compounds, while tannins were found in high concentrations in the methanolic extract, with 69.08 ± 1.69 mg of GAE/g dW, 47.86 ± 1.76 mg of QE/g dW, and 354.98 ± 15.29 mg of TAE/g dW, respectively. The presence of phenols, benzene rings, aromatic compounds, ethers, and methylene chains was verified by FTIR analysis. Finally, HPLC-MS and GC-MS analyses revealed a rich profile of bioactive phytochemicals. This study is the first of its kind to be conducted in Tangier, Northern Morocco, shedding light on the unique chemical composition of Cistus ladanifer in this region.
{"title":"Exploring the Bioactive Potential of Cistus ladanifer Leaves from Northern Morocco (Tangier)","authors":"Bahia Abdelfattah, Amena Mrabet, Ayoub Simou, Mohamed Khaddor","doi":"10.12912/27197050/187764","DOIUrl":"https://doi.org/10.12912/27197050/187764","url":null,"abstract":"The present research explored the antioxidant capacities and phytochemical profile of Cistus ladanifer collected from North Morocco (Tangier), to identify potential medicinal sources of antioxidants. The antioxidant qualities of the extracts were assessed using a variety of analytical methods, such as 2,2-Diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and oxygen radical absorbance capacity (ORAC). Fourier transform infrared (FTIR) spectroscopy, gas chromatography-mass spectrometry (GC-MS), and high-performance liquid chromatography (HPLC) were employed to examine the chemical constituents present in the plant material. Finally, ICP-AES analysis was performed to characterize the nutritional components of the extract, providing detailed insights into its valuable nutrient content. The findings revealed that the methanolic extract displayed considerable antioxidant potential, as evidenced by its powerful scavenging activities against DPPH, with an IC 50 value of 0.115 ± 0.003 mg/ml and IC 50 of 0.251 ± 0.006 mg/ml ABTS radicals. Moreover, it displayed a higher reducing power using the FRAP test and excellent ORAC values, with 62.74 ± 0.07 mg/g and 40.21 ± 0.7 mg/g dry weight of extract, respectively. This research also assessed the total phenolic and total flavonoid compounds, while tannins were found in high concentrations in the methanolic extract, with 69.08 ± 1.69 mg of GAE/g dW, 47.86 ± 1.76 mg of QE/g dW, and 354.98 ± 15.29 mg of TAE/g dW, respectively. The presence of phenols, benzene rings, aromatic compounds, ethers, and methylene chains was verified by FTIR analysis. Finally, HPLC-MS and GC-MS analyses revealed a rich profile of bioactive phytochemicals. This study is the first of its kind to be conducted in Tangier, Northern Morocco, shedding light on the unique chemical composition of Cistus ladanifer in this region.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"74 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141234344","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 : 2024-06-01DOI: 10.12912/27197050/186869
Lubna W. Said, Nadia A. Aziz, Luay Y. Hussein
One of the most common natural hazards that can endanger life and property is drought, which can happen under a variety of weather and environmental circumstances. This study aims to monitor the agricultural and metrologi - cal drought in the Wasit Province using remote sensing data. Landsat 8 images were used to create the agriculture drought maps based on the NDVI for the years 2013, and 2023. Additionally, SPI-12 was used for the same years to evaluate the meteorological drought. The findings demonstrated that while SPI readings in 2023 were lower, the SPI-12 in 2013 indicated near-normal drought types. Two types of drought have been identified: moderate and slight. The result shows that, for the year 2013 the percentage of moderate drought is 31%, slight drought 64%, and no drought 3.9% from the total area. While, in 2023 the percentage of moderate drought is 47%, slight drought 49%, and no drought 3.2% from the total area. It is noticed that in 2023, the moderate drought class increased by about 16%. Government planners may find this results valuable when developing and managing drought consequences .
{"title":"Spatiotemporal Mapping of Agricultural and Meteorological Drought in Wasit Province based on GIS and Remote Sensing Data","authors":"Lubna W. Said, Nadia A. Aziz, Luay Y. Hussein","doi":"10.12912/27197050/186869","DOIUrl":"https://doi.org/10.12912/27197050/186869","url":null,"abstract":"One of the most common natural hazards that can endanger life and property is drought, which can happen under a variety of weather and environmental circumstances. This study aims to monitor the agricultural and metrologi - cal drought in the Wasit Province using remote sensing data. Landsat 8 images were used to create the agriculture drought maps based on the NDVI for the years 2013, and 2023. Additionally, SPI-12 was used for the same years to evaluate the meteorological drought. The findings demonstrated that while SPI readings in 2023 were lower, the SPI-12 in 2013 indicated near-normal drought types. Two types of drought have been identified: moderate and slight. The result shows that, for the year 2013 the percentage of moderate drought is 31%, slight drought 64%, and no drought 3.9% from the total area. While, in 2023 the percentage of moderate drought is 47%, slight drought 49%, and no drought 3.2% from the total area. It is noticed that in 2023, the moderate drought class increased by about 16%. Government planners may find this results valuable when developing and managing drought consequences .","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"2 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141229789","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 : 2024-06-01DOI: 10.12912/27197050/187042
M. Kelmendi, Ismet Mulliqi, Sadija Kadriu, Yllka Mehana, Berat Sinani
Given that the Shala of Bajgora mountain massif geographically extends over a territory already known for its min - eral wealth, where heavy metals predominantly dominate, the groundwater and surface waters that traverse this part of Kosovo’s territory are in the vast majority of cases seriously contaminated with these metals. As a result of this pollution, the inhabitants of these 33 villages of this mountain massif, to varying degrees, both in the past and today, continue to face significant health problems, as the water they consume for drinking is taken from wells and natural sources of these settlements. Knowing the role that water plays in the health of humans and other living beings, our study object focuses on researching, analyzing, evaluating, and interpreting the actual condition of the presence or absence of heavy metals in the waters of some villages of this mountain massif. To ascertain the real condition of the quality of these waters, we have designated several monitoring points - representative, from where we will gather the necessary information about the state of these waters. To be as objective as possible in the analysis of water samples, we have applied classic (volumetric) and instrumental methods of chemical analysis. The results obtained were compared with the reference values of the EU Directive and the Administrative Instruction of Kosovo. The analyses have shown the presence beyond reference values of Pb, Zn, Cd, and Ni in some of the sampling sites.
{"title":"The Impact of Heavy Metals on the Quality of Drinking Water in Some Villages of the Shala of Bajgora Mountain Massif – Kosovo","authors":"M. Kelmendi, Ismet Mulliqi, Sadija Kadriu, Yllka Mehana, Berat Sinani","doi":"10.12912/27197050/187042","DOIUrl":"https://doi.org/10.12912/27197050/187042","url":null,"abstract":"Given that the Shala of Bajgora mountain massif geographically extends over a territory already known for its min - eral wealth, where heavy metals predominantly dominate, the groundwater and surface waters that traverse this part of Kosovo’s territory are in the vast majority of cases seriously contaminated with these metals. As a result of this pollution, the inhabitants of these 33 villages of this mountain massif, to varying degrees, both in the past and today, continue to face significant health problems, as the water they consume for drinking is taken from wells and natural sources of these settlements. Knowing the role that water plays in the health of humans and other living beings, our study object focuses on researching, analyzing, evaluating, and interpreting the actual condition of the presence or absence of heavy metals in the waters of some villages of this mountain massif. To ascertain the real condition of the quality of these waters, we have designated several monitoring points - representative, from where we will gather the necessary information about the state of these waters. To be as objective as possible in the analysis of water samples, we have applied classic (volumetric) and instrumental methods of chemical analysis. The results obtained were compared with the reference values of the EU Directive and the Administrative Instruction of Kosovo. The analyses have shown the presence beyond reference values of Pb, Zn, Cd, and Ni in some of the sampling sites.","PeriodicalId":448145,"journal":{"name":"Ecological Engineering & Environmental Technology","volume":"20 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233897","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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