Pub Date : 2022-07-14DOI: 10.5755/j01.erem.78.2.30322
Tiwi Nurjannati Utami, M. Fattah, Candra Adi Iintyas
Mangroves that grow in coastal areas have ecological and economic values. Research on the behavior of a mangrove ecotourism system is needed as a basis for management to provide sustainable benefits. This study aimed to describe the conceptualization of a mangrove ecotourism system, formulate a mangrove ecotourism model and formulate a scenario for Kampung Blekok mangrove ecotourism in Situbondo Regency. This study used a quantitative analysis with a dynamic system approach to see the behavior of the ecotourism system on the economic and ecological dimensions. The research results on the conceptualization of the ecotourism system with causal loop diagrams showed that the economic subsystem was composed of response variables in the form of ecotourism management income and community business income in ecotourism areas and gross regional domestic product. Meanwhile, the ecological subsystem consisted of response variables in mangroves’ death, planting, and rehabilitation. Model formulation with stock-flow diagrams demonstrated the relationship between response variables to explain the system. In the economic subsystem, the variable of community business acceptance had the highest sensitivity that could affect ecotourism income. While in the ecological subsystem, the highest sensitivity was on the variable of mangrove planting, which could affect the density of mangroves. The combination of economic subsystem scenarios optimized tourist visits and streamlined spending. The combination of ecological subsystem scenarios that became the priority was the addition of mangrove seedlings and controlling pests that caused the death of mangrove seedlings. Stakeholders are expected to synergize with each other in managing activities in ecotourism. Apart from exploiting their economic potential, the community and the private sector are also expected to participate in maintaining compliance with regulations to preserve mangroves. The government should monitor and enforce regulations related to ecotourism and support the development of mangrove ecotourism so that its benefits are sustainable.
{"title":"The System Dynamic of Mangrove Ecotourism of “Kampung Blekok” Situbondo East Java Indonesia: Economic and Ecological Dimension","authors":"Tiwi Nurjannati Utami, M. Fattah, Candra Adi Iintyas","doi":"10.5755/j01.erem.78.2.30322","DOIUrl":"https://doi.org/10.5755/j01.erem.78.2.30322","url":null,"abstract":"Mangroves that grow in coastal areas have ecological and economic values. Research on the behavior of a mangrove ecotourism system is needed as a basis for management to provide sustainable benefits. This study aimed to describe the conceptualization of a mangrove ecotourism system, formulate a mangrove ecotourism model and formulate a scenario for Kampung Blekok mangrove ecotourism in Situbondo Regency. This study used a quantitative analysis with a dynamic system approach to see the behavior of the ecotourism system on the economic and ecological dimensions. The research results on the conceptualization of the ecotourism system with causal loop diagrams showed that the economic subsystem was composed of response variables in the form of ecotourism management income and community business income in ecotourism areas and gross regional domestic product. Meanwhile, the ecological subsystem consisted of response variables in mangroves’ death, planting, and rehabilitation. Model formulation with stock-flow diagrams demonstrated the relationship between response variables to explain the system. In the economic subsystem, the variable of community business acceptance had the highest sensitivity that could affect ecotourism income. While in the ecological subsystem, the highest sensitivity was on the variable of mangrove planting, which could affect the density of mangroves. The combination of economic subsystem scenarios optimized tourist visits and streamlined spending. The combination of ecological subsystem scenarios that became the priority was the addition of mangrove seedlings and controlling pests that caused the death of mangrove seedlings. Stakeholders are expected to synergize with each other in managing activities in ecotourism. Apart from exploiting their economic potential, the community and the private sector are also expected to participate in maintaining compliance with regulations to preserve mangroves. The government should monitor and enforce regulations related to ecotourism and support the development of mangrove ecotourism so that its benefits are sustainable.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85489362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-14DOI: 10.5755/j01.erem.78.2.30421
Yomna Hesham, A. Yousry, S. Qutb, N. Saleh
Despite efforts to achieve environmental sustainability, the globe is not yet on the right track; various difficulties have lately emerged because of development, including natural resource depletion, biodiversity loss, and pollution issues. The strategic objectives of the environment for the year 2030 aim to achieve rational management of natural resource assets and the maintenance of the balance of ecosystems and biodiversity, and hence, it is necessary to deal with the important challenges of current urban development, which directly and indirectly affect resources and ecosystems, and human health. This has led to development of tools to consider the relationship between human activities and environmental sustainability in a policy-relevant way. Such tools can identify policies that might simultaneously achieve sustainability, preserve resources while protecting health and equity. This paper aims at understanding the impact of various urban development sectors on environmental ecosystems through employing a systematic framework to formulate appropriate measures and policies to confront these challenges. Various methodological frameworks are reviewed leading to selection of the ecosystems-enriched Drivers, Pressures, State, Exposure, Effect Action (eDPSEEA) as an appropriate tool for assessing and determining the cause and effect of an ecosystem to guide and direct responses and actions in the Egyptian context. El Fayoum Governorate is selected as a case study to test the suitability of this framework. The study concludes that the application of this systemic methodological approach can enhance understanding of the interrelationships among the multifaceted components within the urban system and its impacts on ecosystems, helping to enhance the decision-making and implementation processes.
{"title":"An Ecosystem-Enriched (EDPSEEA) Methodology for Sustainable Urban Development of Communities in Egypt","authors":"Yomna Hesham, A. Yousry, S. Qutb, N. Saleh","doi":"10.5755/j01.erem.78.2.30421","DOIUrl":"https://doi.org/10.5755/j01.erem.78.2.30421","url":null,"abstract":"Despite efforts to achieve environmental sustainability, the globe is not yet on the right track; various difficulties have lately emerged because of development, including natural resource depletion, biodiversity loss, and pollution issues. The strategic objectives of the environment for the year 2030 aim to achieve rational management of natural resource assets and the maintenance of the balance of ecosystems and biodiversity, and hence, it is necessary to deal with the important challenges of current urban development, which directly and indirectly affect resources and ecosystems, and human health. This has led to development of tools to consider the relationship between human activities and environmental sustainability in a policy-relevant way. Such tools can identify policies that might simultaneously achieve sustainability, preserve resources while protecting health and equity. This paper aims at understanding the impact of various urban development sectors on environmental ecosystems through employing a systematic framework to formulate appropriate measures and policies to confront these challenges. Various methodological frameworks are reviewed leading to selection of the ecosystems-enriched Drivers, Pressures, State, Exposure, Effect Action (eDPSEEA) as an appropriate tool for assessing and determining the cause and effect of an ecosystem to guide and direct responses and actions in the Egyptian context. El Fayoum Governorate is selected as a case study to test the suitability of this framework. The study concludes that the application of this systemic methodological approach can enhance understanding of the interrelationships among the multifaceted components within the urban system and its impacts on ecosystems, helping to enhance the decision-making and implementation processes.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78796403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-14DOI: 10.5755/j01.erem.78.2.30668
S. Rojas Flores, Orlando Pérez-Delgado, Nazario Naveda-Renny, Santiago M. Benites, M. De La Cruz –Noriega, D. D. Delfin Narciso
The large amount of molasses that are generated in sugar-processing companies are not always redistributed for commercialization in by-products. Because of this, the present research uses these wastes as fuel in low-cost, lab-scale, single-chamber microbial fuel cells. Zinc and copper electrodes were used as electrodes and 100 mL of molasse in the chamber as fuel, managing to generate current and voltage peaks of 1.73 ± 0.13 mA and 0.953 ± 0.142 V. In monitoring the conductivity of the substrate, a maximum peak of 111.156 ± 8.45 mS/cm was observed, and a slightly acidic pH was observed throughout the monitoring. It was possible to obtain a power density of 5.45 ± 0.31 W/cm2 for a current density of 308.06 mA/cm2, while the yeast count showed a logarithmic curve throughout the monitoring. Finally, the molecular technique identified 100% of the special C. boidinii present in the anodic electrode. This research will give great benefits to sugar companies because they will be able to generate electricity using the molasses that cannot generate by-products.
{"title":"Generation of Bioelectricity Using Molasses as Fuel in Microbial Fuel Cells","authors":"S. Rojas Flores, Orlando Pérez-Delgado, Nazario Naveda-Renny, Santiago M. Benites, M. De La Cruz –Noriega, D. D. Delfin Narciso","doi":"10.5755/j01.erem.78.2.30668","DOIUrl":"https://doi.org/10.5755/j01.erem.78.2.30668","url":null,"abstract":"The large amount of molasses that are generated in sugar-processing companies are not always redistributed for commercialization in by-products. Because of this, the present research uses these wastes as fuel in low-cost, lab-scale, single-chamber microbial fuel cells. Zinc and copper electrodes were used as electrodes and 100 mL of molasse in the chamber as fuel, managing to generate current and voltage peaks of 1.73 ± 0.13 mA and 0.953 ± 0.142 V. In monitoring the conductivity of the substrate, a maximum peak of 111.156 ± 8.45 mS/cm was observed, and a slightly acidic pH was observed throughout the monitoring. It was possible to obtain a power density of 5.45 ± 0.31 W/cm2 for a current density of 308.06 mA/cm2, while the yeast count showed a logarithmic curve throughout the monitoring. Finally, the molecular technique identified 100% of the special C. boidinii present in the anodic electrode. This research will give great benefits to sugar companies because they will be able to generate electricity using the molasses that cannot generate by-products.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"138 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86011149","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}
Indonesia is the world’s second greatest producer of plastic waste after China. The bulk of waste produced accumulates in metropolitan regions due to the increasing population, and the situation has spread to rural areas with a limited population. The residents of the Sinjai Regency have felt the impact of the growing amount of debris, and it is expected to worsen without immediate action. Coastal locations that accommodate waste from land and water are mostly affected by debris. The study was conducted in Bone Bay, Sinjai Regency’s coastline area. The bay’s condition is sheltered to decrease the current strength, but it varies from season to season. Furthermore, it used shoreline survey methodology, where debris grouping consisted of plastics, metal, rubber, glass, clothing, and others. The debris data were calculated and analyzed based on the seasons of the west (January) and east (July). The data were associated with the current pattern model in Bone Bay waters based on the season. In January and July, 86% of waste was plastic, 3% was metal, 4% was rubber, 2% was clothing, while 5% and 4% were glass. No other types of waste were identified in January, while 1% was detected in July. Garbage that enters through rivers, garbage deposited by local residents, and tourism activities at the four observation areas are all contributing to the presence of waste in Sinjai’s coastal area.
{"title":"Distribution and Composition of Marine Debris in the Shoreline Area of Bone Bay Indonesia","authors":"Ridha Alamsyah, A. Zulkifli, Irfan Fauzi, Andi Liswahyuni, Armita Permatasar, Hamzah Wahab","doi":"10.5755/j01.erem.78.2.28933","DOIUrl":"https://doi.org/10.5755/j01.erem.78.2.28933","url":null,"abstract":"Indonesia is the world’s second greatest producer of plastic waste after China. The bulk of waste produced accumulates in metropolitan regions due to the increasing population, and the situation has spread to rural areas with a limited population. The residents of the Sinjai Regency have felt the impact of the growing amount of debris, and it is expected to worsen without immediate action. Coastal locations that accommodate waste from land and water are mostly affected by debris. The study was conducted in Bone Bay, Sinjai Regency’s coastline area. The bay’s condition is sheltered to decrease the current strength, but it varies from season to season. Furthermore, it used shoreline survey methodology, where debris grouping consisted of plastics, metal, rubber, glass, clothing, and others. The debris data were calculated and analyzed based on the seasons of the west (January) and east (July). The data were associated with the current pattern model in Bone Bay waters based on the season. In January and July, 86% of waste was plastic, 3% was metal, 4% was rubber, 2% was clothing, while 5% and 4% were glass. No other types of waste were identified in January, while 1% was detected in July. Garbage that enters through rivers, garbage deposited by local residents, and tourism activities at the four observation areas are all contributing to the presence of waste in Sinjai’s coastal area.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72383828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-14DOI: 10.5755/j01.erem.78.2.29695
A. Arinkoola, S. Alagbe, I. Akinwole, Ayobami I Ogundiran, Lawrence Ajayi, O. Agbede, O. Ogunleye
The use of commercial activated carbon (AC) to remove organic micropollutants from aqueous solution is expensive and unsustainable. In this study, coconut shell activated carbon (CSAC) was synthesized and applied for the removal of ibuprofen, ketoprofen and naproxen from aqueous solutions. The effects of carbonization and acid activation on the CSAC were studied using Fourier-transform infrared spectroscopy, scanning electron microscope, proximate and ultimate analyses. The influence of initial concentration (200–1000 mg/L), contact time (10–200 min), and temperature (30–60°C) was also investigated. The adsorptive capacity of CSAC for various pollutants was found to increase with concentration up to 150 min. Ibuprofen, ketoprofen and naproxen removal obeyed Langmuir (R2 = 0.9978), Temkin (R2 = 0.9551) and Freundlich (R2 = 0.9879) isotherm, respectively. The kinetic data obtained for various pollutants are best described by the pseudo-first-order model with correlation coefficient values in the range 0.96–0.99. The free energy ( G) values ranged between 1.0 and 9.0 kJ/mol for all the pollutants investigated. The mechanism of adsorption is physical, endothermic, and non-spontaneous. This study shows that CSAC is an effective alternative adsorbent for sequestering mixture of organic pollutants from aqueous solution.
{"title":"Adsorptive Removal of Ibuprofen, Ketoprofen and Naproxen from Aqueous Solution Using Coconut Shell Biomass","authors":"A. Arinkoola, S. Alagbe, I. Akinwole, Ayobami I Ogundiran, Lawrence Ajayi, O. Agbede, O. Ogunleye","doi":"10.5755/j01.erem.78.2.29695","DOIUrl":"https://doi.org/10.5755/j01.erem.78.2.29695","url":null,"abstract":"The use of commercial activated carbon (AC) to remove organic micropollutants from aqueous solution is expensive and unsustainable. In this study, coconut shell activated carbon (CSAC) was synthesized and applied for the removal of ibuprofen, ketoprofen and naproxen from aqueous solutions. The effects of carbonization and acid activation on the CSAC were studied using Fourier-transform infrared spectroscopy, scanning electron microscope, proximate and ultimate analyses. The influence of initial concentration (200–1000 mg/L), contact time (10–200 min), and temperature (30–60°C) was also investigated. The adsorptive capacity of CSAC for various pollutants was found to increase with concentration up to 150 min. Ibuprofen, ketoprofen and naproxen removal obeyed Langmuir (R2 = 0.9978), Temkin (R2 = 0.9551) and Freundlich (R2 = 0.9879) isotherm, respectively. The kinetic data obtained for various pollutants are best described by the pseudo-first-order model with correlation coefficient values in the range 0.96–0.99. The free energy ( G) values ranged between 1.0 and 9.0 kJ/mol for all the pollutants investigated. The mechanism of adsorption is physical, endothermic, and non-spontaneous. This study shows that CSAC is an effective alternative adsorbent for sequestering mixture of organic pollutants from aqueous solution.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89664930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-14DOI: 10.5755/j01.erem.78.2.29971
R. Rabeiy, Saud Jaza Almutairi
The atmospheric stability and depth of the mixing layer are essential parameters in modelling the dispersion of pollutants and sandstorms in arid regions. In this study, a MATLAB model was used to determine the hourly atmospheric stability conditions and the depth of the mixing layer in the year 2019, especially during sandstorms events. The statistical analysis of hourly sandstorms was investigated over four decades (from 1980 to 2019) and its relationships with the weather conditions, especially wind speed and direction were figured in the study area. The average mixing layer during daytime hours in the summer season was 1800 ± 400 m, while during night hours, the average mixing height was 500 ± 200 m. The study concluded that the major wind direction during sandstorms was blowing to the south direction ± 22.5 degrees. It was noted that relative humidity increased while the average temperature decreased over the last decade during the sandstorm events due to the wide cultivation in this period. The cultivation of tall trees on the northwest side of the study area will decrease the severity of sandstorms in future. This study could be applied to arid regions that suffer sandstorms such as Arabian Peninsula.
{"title":"Modeling the Atmospheric Stability and the Mixing Layer Depth and their Relationship with Sandstorms in an Arid Area","authors":"R. Rabeiy, Saud Jaza Almutairi","doi":"10.5755/j01.erem.78.2.29971","DOIUrl":"https://doi.org/10.5755/j01.erem.78.2.29971","url":null,"abstract":"The atmospheric stability and depth of the mixing layer are essential parameters in modelling the dispersion of pollutants and sandstorms in arid regions. In this study, a MATLAB model was used to determine the hourly atmospheric stability conditions and the depth of the mixing layer in the year 2019, especially during sandstorms events. The statistical analysis of hourly sandstorms was investigated over four decades (from 1980 to 2019) and its relationships with the weather conditions, especially wind speed and direction were figured in the study area. The average mixing layer during daytime hours in the summer season was 1800 ± 400 m, while during night hours, the average mixing height was 500 ± 200 m. The study concluded that the major wind direction during sandstorms was blowing to the south direction ± 22.5 degrees. It was noted that relative humidity increased while the average temperature decreased over the last decade during the sandstorm events due to the wide cultivation in this period. The cultivation of tall trees on the northwest side of the study area will decrease the severity of sandstorms in future. This study could be applied to arid regions that suffer sandstorms such as Arabian Peninsula.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89231572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.5755/j01.erem.78.1.29597
Rawaa H. K. Al-Isawi, H. A. Al-Zubaidi, I. Idan, M. Scholz
In hot climates, achieving a good indoor environmental quality (IEQ) in existing buildings is important especially with climate change challenges as future heat waves will increase in frequency, duration, and intensity. In educational buildings, there is much more focus on the IEQ parameters and the interactions among them that need to be in line with the continuously changing learning environment. This study assesses the IEQ parameters (represented by noise, temperature and humidity) at three selected campus areas (lecture rooms of an administrative department building (LR), main hall of a management department building (MH) and a central library building (CL)) at the Al-Najaf Technical Institute (NTI), Al-Najaf City, Iraq, for the period from May to December 2019. A statistical analysis using a multi-linear regression model was performed to determine the relationship between the selected IEQ parameters and explain the noise level behavior as a function of the temperature and relative humidity. The research indicated that the noise levels and temperature values exceeded the maximum standard limits in all buildings reflecting the displeasing sound and heating quality within the studied areas, while the readings for relative humidity within each building environment complied with standards. Moreover, for both LR and MH buildings (R2 ≥ 0.8, significance F ≤ 0.01), the noise values were satisfactorily modeled by temperature and relative humidity highlighting the interactions between temperature, humidity and noise under consistent conditions. However, the results for the CL building (R2 = 0.6, significance F = 0.1) showed no relationship between the IEQ parameters, highlighting the fact that this building is exposed to unsteady conditions (an irregular number of people using this building during the daytime) resulting in a high variation of data measurements. The current results demonstrate that detailed modeling can be helpful to predict IEQ parameters depending on other known parameters in buildings. The results of the predictive model aligned with the directly measured data. Therefore, its performance is equally effective, but with a significant reduction in cost and time consumed.
{"title":"Prediction of Indoor Environmental Quality Using a Regression Model for Educational Buildings in Hot Arid Climate: A Case Study in the Al-Najaf Technical Institute – Iraq","authors":"Rawaa H. K. Al-Isawi, H. A. Al-Zubaidi, I. Idan, M. Scholz","doi":"10.5755/j01.erem.78.1.29597","DOIUrl":"https://doi.org/10.5755/j01.erem.78.1.29597","url":null,"abstract":"In hot climates, achieving a good indoor environmental quality (IEQ) in existing buildings is important especially with climate change challenges as future heat waves will increase in frequency, duration, and intensity. In educational buildings, there is much more focus on the IEQ parameters and the interactions among them that need to be in line with the continuously changing learning environment. This study assesses the IEQ parameters (represented by noise, temperature and humidity) at three selected campus areas (lecture rooms of an administrative department building (LR), main hall of a management department building (MH) and a central library building (CL)) at the Al-Najaf Technical Institute (NTI), Al-Najaf City, Iraq, for the period from May to December 2019. A statistical analysis using a multi-linear regression model was performed to determine the relationship between the selected IEQ parameters and explain the noise level behavior as a function of the temperature and relative humidity. The research indicated that the noise levels and temperature values exceeded the maximum standard limits in all buildings reflecting the displeasing sound and heating quality within the studied areas, while the readings for relative humidity within each building environment complied with standards. Moreover, for both LR and MH buildings (R2 ≥ 0.8, significance F ≤ 0.01), the noise values were satisfactorily modeled by temperature and relative humidity highlighting the interactions between temperature, humidity and noise under consistent conditions. However, the results for the CL building (R2 = 0.6, significance F = 0.1) showed no relationship between the IEQ parameters, highlighting the fact that this building is exposed to unsteady conditions (an irregular number of people using this building during the daytime) resulting in a high variation of data measurements. The current results demonstrate that detailed modeling can be helpful to predict IEQ parameters depending on other known parameters in buildings. The results of the predictive model aligned with the directly measured data. Therefore, its performance is equally effective, but with a significant reduction in cost and time consumed.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83128692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.5755/j01.erem.78.1.29591
M. De La Cruz-Noriega, S. Rojas-Flores, Santiago M. Benites, M. A. Quezada Álvarez, N. M. Otiniano García, Magda Rodríguez Yupanqui
In this study, we aimed to determine the in vitro activity of Leuconostoc mesenteroides var. mesenteroides isolatedfrom sugar-industry effluents to produce a dextran bioflocculant from sucrose as a low-cost substrate.L. mesenteroides strains present in residual cane juice from a sugar factory were isolated and biochemicallyidentified using Mayeux, Sandine, and Elliker agar (MSE) as a selective medium. The strain number 3 (LM03) wasbiochemically identified as L. mesenteroides var. mesenteroides, which was used for this study. The concentrationof dextran was quantified by dry weight, the morphology and purity were evaluated using Fourier-transforminfrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy(EDS). Flocculation was evaluated via turbidimetric assays in different pH ranges from sugar-industry effluentsand doses of dextran.To evaluate the flocculant activity according to the effect of pH, a jar test kit from Phipps and Bird, USA, wasused with the sample recollected from the effluent (sugar industry). The pH of the samples was adjusted to 7, 8,9, 10 and 11, with a dose of 40 ppm (dextran dose) at a fast and slow speed of 150 and 50 rpm, respectively. Toevaluate the influence of the dose of dextran, values of 5, 20 and 40 ppm were used with fast speeds of 180–150rpm and slow speeds of 30–50 rpm, respectively.The strain (LM03) was able to produce the highest concentration of dextran (26.87 g/L) in 76 h of incubation. Thepresence of dextran was identified in the MSE agar after incubation and characterized by FTIR, SEM, and EDS.Besides that, we observed that the best flocculation activity was observed at a pH of 9 and a concentration of 40ppm of dextran, with a fast agitation speed of 150 rpm for 5 min and a slow agitation speed of 50 rpm for 15 min,achieving 77.7% removal of turbidity from the sugar factory effluent.L. mesenteroides was responsible for the bioflocculation of dextran in different sugar-industry effluents
在这项研究中，我们旨在确定从制糖工业废水中分离的肠系膜芽孢杆菌(Leuconostoc mesenteroides)的体外活性，以蔗糖作为低成本底物生产葡聚糖生物絮凝剂。采用Mayeux、Sandine和Elliker琼脂(MSE)作为选择培养基，对某糖厂残蔗汁中的肠系膜菌株进行了分离和生化鉴定。菌株3号(LM03)经生化鉴定为L. mesenteroides var. mesenteroides，用于本研究。用干重法测定葡聚糖的浓度，用傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)和能量色散x射线光谱(EDS)评价葡聚糖的形貌和纯度。通过浊度法测定制糖工业废水在不同pH范围和葡聚糖剂量下的絮凝效果。为了根据pH值的影响来评估絮凝剂的活性，使用了美国Phipps and Bird公司的罐子测试试剂盒，对从废水(制糖工业)中收集的样品进行了测试。将样品的pH调整为7、8、9、10和11，以40 ppm(葡聚糖剂量)的剂量分别在150和50 rpm的快、慢转速下进行。为了评估右旋糖酐剂量的影响，分别在180-150rpm的快转速和30 - 50rpm的慢转速下使用5,20和40ppm的值。菌株LM03在培养76 h后葡聚糖的浓度最高，为26.87 g/L。培养后在MSE琼脂中发现葡聚糖的存在，并通过FTIR, SEM和EDS进行了表征。此外，我们还观察到，在pH = 9、葡聚糖浓度为40ppm的条件下，快速搅拌速度为150转/分，搅拌5分钟，慢速搅拌速度为50转/分，搅拌15分钟，絮凝活性最佳，糖厂出水浊度去除率达到77.7%。肠系膜菌负责葡聚糖在不同制糖工业废水中的生物絮凝
{"title":"Use of Leuconostoc Mesenteroides to Produce a Dextran Bioflocculant","authors":"M. De La Cruz-Noriega, S. Rojas-Flores, Santiago M. Benites, M. A. Quezada Álvarez, N. M. Otiniano García, Magda Rodríguez Yupanqui","doi":"10.5755/j01.erem.78.1.29591","DOIUrl":"https://doi.org/10.5755/j01.erem.78.1.29591","url":null,"abstract":"In this study, we aimed to determine the in vitro activity of Leuconostoc mesenteroides var. mesenteroides isolatedfrom sugar-industry effluents to produce a dextran bioflocculant from sucrose as a low-cost substrate.L. mesenteroides strains present in residual cane juice from a sugar factory were isolated and biochemicallyidentified using Mayeux, Sandine, and Elliker agar (MSE) as a selective medium. The strain number 3 (LM03) wasbiochemically identified as L. mesenteroides var. mesenteroides, which was used for this study. The concentrationof dextran was quantified by dry weight, the morphology and purity were evaluated using Fourier-transforminfrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy(EDS). Flocculation was evaluated via turbidimetric assays in different pH ranges from sugar-industry effluentsand doses of dextran.To evaluate the flocculant activity according to the effect of pH, a jar test kit from Phipps and Bird, USA, wasused with the sample recollected from the effluent (sugar industry). The pH of the samples was adjusted to 7, 8,9, 10 and 11, with a dose of 40 ppm (dextran dose) at a fast and slow speed of 150 and 50 rpm, respectively. Toevaluate the influence of the dose of dextran, values of 5, 20 and 40 ppm were used with fast speeds of 180–150rpm and slow speeds of 30–50 rpm, respectively.The strain (LM03) was able to produce the highest concentration of dextran (26.87 g/L) in 76 h of incubation. Thepresence of dextran was identified in the MSE agar after incubation and characterized by FTIR, SEM, and EDS.Besides that, we observed that the best flocculation activity was observed at a pH of 9 and a concentration of 40ppm of dextran, with a fast agitation speed of 150 rpm for 5 min and a slow agitation speed of 50 rpm for 15 min,achieving 77.7% removal of turbidity from the sugar factory effluent.L. mesenteroides was responsible for the bioflocculation of dextran in different sugar-industry effluents","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83559816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.5755/j01.erem.78.1.29963
Polina Lemenkova
Integrated mapping is essential in geological studies to assess risks of earthquake hazards. Cartographic techniques have become a commonplace approach to visualizing data in the continuous geologic and geophysical fields. However, traditional GIS mapping is a manual process with a time-consuming workflow that can lead to mistakes and misinterpretation of data. This study applied two mapping approaches to address this problem: Generic Mapping Tools (GMT) used for automated cartographic workflow employing scripts and QGIS used for traditional geologic mapping. The study area includes Ethiopia, notable for its complex geologic setting. The study aimed to analyse the relationships between the geophysical, geological, topographic and seismic setting of the country by presenting six new thematic maps:1 topography based on the GEBCO/SRTM15+ high-resolution grid;2 geological units with consistent lithology and age from the USGS database;3 geological provinces with major Amhara Plateau and Somali Province using USGS data;4 geoid based on the Earth Gravitational Model 2008 (EGM-2008) grid;5 free-air gravity anomaly model using satellite-based remote sensing data;6 seismicity showing earthquakes and volcanos from 05/03/1990 to 27/11/2020.The comparison of the topography, seismicity, geophysics and surface geology of the Afar Depression and the Great Rift Valley was based partly on extant literature on the geologic setting of Ethiopia which primarily focuses upon discussing tectonic processes that took place in the East African Rift System in the past. The current study contributes to the previous research and increases cartographic data on the geology and geophysics of Ethiopia. The outcomes can be implemented in similar regional projects in Ethiopia for geophysical and geological monitoring.
{"title":"Seismicity in the Afar Depression and Great Rift Valley, Ethiopia","authors":"Polina Lemenkova","doi":"10.5755/j01.erem.78.1.29963","DOIUrl":"https://doi.org/10.5755/j01.erem.78.1.29963","url":null,"abstract":"Integrated mapping is essential in geological studies to assess risks of earthquake hazards. Cartographic techniques have become a commonplace approach to visualizing data in the continuous geologic and geophysical fields. However, traditional GIS mapping is a manual process with a time-consuming workflow that can lead to mistakes and misinterpretation of data. This study applied two mapping approaches to address this problem: Generic Mapping Tools (GMT) used for automated cartographic workflow employing scripts and QGIS used for traditional geologic mapping. The study area includes Ethiopia, notable for its complex geologic setting. The study aimed to analyse the relationships between the geophysical, geological, topographic and seismic setting of the country by presenting six new thematic maps:1 topography based on the GEBCO/SRTM15+ high-resolution grid;2 geological units with consistent lithology and age from the USGS database;3 geological provinces with major Amhara Plateau and Somali Province using USGS data;4 geoid based on the Earth Gravitational Model 2008 (EGM-2008) grid;5 free-air gravity anomaly model using satellite-based remote sensing data;6 seismicity showing earthquakes and volcanos from 05/03/1990 to 27/11/2020.The comparison of the topography, seismicity, geophysics and surface geology of the Afar Depression and the Great Rift Valley was based partly on extant literature on the geologic setting of Ethiopia which primarily focuses upon discussing tectonic processes that took place in the East African Rift System in the past. The current study contributes to the previous research and increases cartographic data on the geology and geophysics of Ethiopia. The outcomes can be implemented in similar regional projects in Ethiopia for geophysical and geological monitoring.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"116 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75642243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.5755/j01.erem.78.1.29502
Chomnutcha Boonmee, C. Kositanont, T. Leejarkpai
In this study, three common biodegradable plastics, namely, poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV), poly(butylene succinate) (PBS) and poly(butylene adipate-co-terephthalate) (PBAT) were all buried in a mixture of landfill soil and wastewater sludge and incubated under thermophilic (61°C) oxygen-limited conditions. At the end of the 90-day test, the degradation ranking order was PHBV > PBS > PBAT. Only PHBV was completely degraded over the 60 days, while PBS and PBAT displayed 24.04% ± 3.37% and 18.26% ± 3.77% weight loss, respectively. The differences in the degradation and disintegration profiles among these materials were observed. The results showed that PHBV lost its thickness and degraded from the edges of the specimens. Both PBS and PBAT were reduced into small fragile fragments during the degradation process. SEM micrographs revealed that irregular roughness with many holes and cracks was characteristic of PHBV, while slightly smooth surfaces were found on PBS and PBAT. All the materials showed continuous decreases in the thermal stability and the percentage of carbon content in the molecular structures after the degradation test. Fourier transform infrared (FTIR) spectroscopy revealed that the chemical structure of PHBV was changed during the biodegradation test, while both PBS and PBAT were unchanged under the same test conditions. However, the peak for carboxylate ions was found after the degradation of all the samples. Having a deep understanding of the degradability behavior can contribute to the development of biodegradable plastic waste management in the future.
{"title":"Degradation Behavior of Biodegradable Plastics in Thermophilic Landfill Soil and Wastewater Sludge Conditions","authors":"Chomnutcha Boonmee, C. Kositanont, T. Leejarkpai","doi":"10.5755/j01.erem.78.1.29502","DOIUrl":"https://doi.org/10.5755/j01.erem.78.1.29502","url":null,"abstract":"In this study, three common biodegradable plastics, namely, poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV), poly(butylene succinate) (PBS) and poly(butylene adipate-co-terephthalate) (PBAT) were all buried in a mixture of landfill soil and wastewater sludge and incubated under thermophilic (61°C) oxygen-limited conditions. At the end of the 90-day test, the degradation ranking order was PHBV > PBS > PBAT. Only PHBV was completely degraded over the 60 days, while PBS and PBAT displayed 24.04% ± 3.37% and 18.26% ± 3.77% weight loss, respectively. The differences in the degradation and disintegration profiles among these materials were observed. The results showed that PHBV lost its thickness and degraded from the edges of the specimens. Both PBS and PBAT were reduced into small fragile fragments during the degradation process. SEM micrographs revealed that irregular roughness with many holes and cracks was characteristic of PHBV, while slightly smooth surfaces were found on PBS and PBAT. All the materials showed continuous decreases in the thermal stability and the percentage of carbon content in the molecular structures after the degradation test. Fourier transform infrared (FTIR) spectroscopy revealed that the chemical structure of PHBV was changed during the biodegradation test, while both PBS and PBAT were unchanged under the same test conditions. However, the peak for carboxylate ions was found after the degradation of all the samples. Having a deep understanding of the degradability behavior can contribute to the development of biodegradable plastic waste management in the future.","PeriodicalId":11703,"journal":{"name":"Environmental Research, Engineering and Management","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89437728","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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