Extended Abstract Recently, acetaminophen, estrogen and bisphenol-A have become emerging contaminants in water systems and environment due to their increased presence in water that causes adverse effects in health and aquatic ecosystems [1-4]. The first two contaminants are the result of the increased human excretion and improper disposal [1,2]. Although the concentrations of these contaminants are very low, typically in the nanomolar range, acetaminophen’s long-term exposure to individuals can cause increased mortality, as well as heart, gastrointestinal, and kidney diseases, and estrogen is toxic and can cause breast and prostate cancers. Estrogen is a plasticizers' derivative chemical, resulting from leaching from packaging materials such as feeding bottles, water bottles, and beverage cans into food and water. Exposure to bisphenol-A can also adversely affect on brain, thyroid, and reproductive organs, leading to neurodegenerative, cardiovascular, and carcinogenic diseases due to its toxic behaviour [3,4]. Therefore, frequent monitoring of these contaminants is critical to predict their exposure and adverse effect to humans. Conventional analytical techniques such as liquid chromatography and enzymelinked immunosorbent assay are commonly used for detecting these contaminants [3]. However, recently, electrochemical sensing techniques have shown much promise for simple, rapid, and precise detection of these contaminants. These electrochemical sensors are simple to fabricate and have small
{"title":"Nanomaterials-based Electrochemical Sensors for the Detection of Emerging Contaminants","authors":"M. Howlader","doi":"10.11159/icnfa23.003","DOIUrl":"https://doi.org/10.11159/icnfa23.003","url":null,"abstract":"Extended Abstract Recently, acetaminophen, estrogen and bisphenol-A have become emerging contaminants in water systems and environment due to their increased presence in water that causes adverse effects in health and aquatic ecosystems [1-4]. The first two contaminants are the result of the increased human excretion and improper disposal [1,2]. Although the concentrations of these contaminants are very low, typically in the nanomolar range, acetaminophen’s long-term exposure to individuals can cause increased mortality, as well as heart, gastrointestinal, and kidney diseases, and estrogen is toxic and can cause breast and prostate cancers. Estrogen is a plasticizers' derivative chemical, resulting from leaching from packaging materials such as feeding bottles, water bottles, and beverage cans into food and water. Exposure to bisphenol-A can also adversely affect on brain, thyroid, and reproductive organs, leading to neurodegenerative, cardiovascular, and carcinogenic diseases due to its toxic behaviour [3,4]. Therefore, frequent monitoring of these contaminants is critical to predict their exposure and adverse effect to humans. Conventional analytical techniques such as liquid chromatography and enzymelinked immunosorbent assay are commonly used for detecting these contaminants [3]. However, recently, electrochemical sensing techniques have shown much promise for simple, rapid, and precise detection of these contaminants. These electrochemical sensors are simple to fabricate and have small","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134112452","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}
Umangi H. Mehta, V. Botlaguduru, M. Bose, V. Sethi
Dust resuspension caused by wind over open stockyard surfaces is a widespread issue in various industries, particularly in ports that handle dusty cargo. Previous research has identified windscreens as an effective measure to mitigate dust resuspension from stockpiles [1]. However, the efficiency of these measures is significantly influenced by factors such as wind conditions, pile and windscreen configuration, and stockpile arrangement [1]. Previous studies conducted using field and experimental methods have been resource-intensive and faced difficulties in establishing a controlled environment that without interfering with ongoing operations [2], and in scaling of the experiments [3]. To supplement these studies, the present work utilized Computational Fluid Dynamics (CFD) simulations to assess the impact of wind erosion on dust resuspension from stockpiles [4] [5][6]. CFD simulations were conducted using a numerical modeling approach to investigate the fluid flow over stockpiles and the resulting dust resuspension. The model was scaled at a ratio of 1:100 to represent two stockpile geometries for bulk materials: a conical pile and a flat oval top pile, both with a height of 11m and an angle of repose of 37˚, with a domain ar ea of 4m (L) x 1m (W) x 1m (H) [1][5]. The domain was discretized using the tetrahedral method, and the lateral walls were assigned symmetry boundary conditions. The bottom wall was set at a roughness of 4 mm with a no-slip condition. Inlet
风在露天堆场表面引起的粉尘悬浮是各行业普遍存在的问题，特别是在处理含尘货物的港口。先前的研究已经确定挡风玻璃是减少库存粉尘再悬浮的有效措施[1]。然而，这些措施的效率受到风况、桩与挡风玻璃配置、堆垛布置等因素的显著影响[1]。以往使用现场和实验方法进行的研究资源密集，难以建立不干扰正在进行的操作的受控环境[2]，也难以扩大实验规模[3]。为了补充这些研究，本工作利用计算流体动力学(CFD)模拟来评估风蚀对库存粉尘再悬浮的影响[4][5][6]。采用数值模拟方法进行了CFD模拟，研究了储存库上的流体流动和由此产生的粉尘再悬浮。模型按1:100的比例进行缩放，表示两种散体物料的储存几何形状:锥形桩和扁平椭圆形顶桩，高度均为11m，休止角为37˚，域面积为4m (L) x 1m (W) x 1m (H)[1][5]。采用四面体方法对区域进行离散化，并赋予侧壁对称边界条件。底壁设置为4毫米的粗糙度，无滑移条件。入口
{"title":"Studies for Mitigation Measures for Dust Resuspension from Stockpiles","authors":"Umangi H. Mehta, V. Botlaguduru, M. Bose, V. Sethi","doi":"10.11159/icepr23.123","DOIUrl":"https://doi.org/10.11159/icepr23.123","url":null,"abstract":"Dust resuspension caused by wind over open stockyard surfaces is a widespread issue in various industries, particularly in ports that handle dusty cargo. Previous research has identified windscreens as an effective measure to mitigate dust resuspension from stockpiles [1]. However, the efficiency of these measures is significantly influenced by factors such as wind conditions, pile and windscreen configuration, and stockpile arrangement [1]. Previous studies conducted using field and experimental methods have been resource-intensive and faced difficulties in establishing a controlled environment that without interfering with ongoing operations [2], and in scaling of the experiments [3]. To supplement these studies, the present work utilized Computational Fluid Dynamics (CFD) simulations to assess the impact of wind erosion on dust resuspension from stockpiles [4] [5][6]. CFD simulations were conducted using a numerical modeling approach to investigate the fluid flow over stockpiles and the resulting dust resuspension. The model was scaled at a ratio of 1:100 to represent two stockpile geometries for bulk materials: a conical pile and a flat oval top pile, both with a height of 11m and an angle of repose of 37˚, with a domain ar ea of 4m (L) x 1m (W) x 1m (H) [1][5]. The domain was discretized using the tetrahedral method, and the lateral walls were assigned symmetry boundary conditions. The bottom wall was set at a roughness of 4 mm with a no-slip condition. Inlet","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116188492","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}
- Laundering clothes by consumers is paramount for maintaining health and hygiene. Drying of clothes is a crucial part of laundry, and in most developing countries this means spreading clothes on lines to be dried by the sun, or passive outdoor drying (POD). However, due to urbanisation and the proliferation of condos there is little room for sun drying clothes. Additionally, electric washing machines and clothes dryers have become commonplace in many modern homes, however, they consume enormous amounts of energy when drying clothes. Moreover, most families in under-served countries often cannot afford exorbitant electricity bills making these methods to domestic laundry not sustainable. With the continued drive for sustainable living, there is a need for energy conservation alternatives. In other related research work solar energy has been applied in agriculture for drying and preserving food, in electricity and lighting using Photovoltaic (PV) cells, and for heating via radiation. This article explores an alternative for domestic laundry with solar energy, harnessed heat and related technologies. This work does not rely solely on PV cells to generate electrical energy to power heaters, rather we borrow from the food drying process used in agriculture. This entails combining solar concentrators, which focus the sun’s energy into a chamber, with a system that channels household heat sources into the same chamber. Within this chamber clothes are hung using smart clothes pegs, which hold the clothes in place. The pegs also measure the moisture level of each garment, then use the telemetry data to control the heat within the chamber. Using these combined systems, enormous amounts of grid electricity and carbon-dioxide emissions can be saved. Actor Network Theory (ANT) and relevant adoption models and theories will investigate consumer adoption and how this technological design is shaped by encompassing socio-cultural factors and physical realities.
{"title":"A Conceptual Model for Clothes Drying Using Composite Energy Sources","authors":"Michael Conyette, Olasupo O. Ajayi","doi":"10.11159/icert23.110","DOIUrl":"https://doi.org/10.11159/icert23.110","url":null,"abstract":"- Laundering clothes by consumers is paramount for maintaining health and hygiene. Drying of clothes is a crucial part of laundry, and in most developing countries this means spreading clothes on lines to be dried by the sun, or passive outdoor drying (POD). However, due to urbanisation and the proliferation of condos there is little room for sun drying clothes. Additionally, electric washing machines and clothes dryers have become commonplace in many modern homes, however, they consume enormous amounts of energy when drying clothes. Moreover, most families in under-served countries often cannot afford exorbitant electricity bills making these methods to domestic laundry not sustainable. With the continued drive for sustainable living, there is a need for energy conservation alternatives. In other related research work solar energy has been applied in agriculture for drying and preserving food, in electricity and lighting using Photovoltaic (PV) cells, and for heating via radiation. This article explores an alternative for domestic laundry with solar energy, harnessed heat and related technologies. This work does not rely solely on PV cells to generate electrical energy to power heaters, rather we borrow from the food drying process used in agriculture. This entails combining solar concentrators, which focus the sun’s energy into a chamber, with a system that channels household heat sources into the same chamber. Within this chamber clothes are hung using smart clothes pegs, which hold the clothes in place. The pegs also measure the moisture level of each garment, then use the telemetry data to control the heat within the chamber. Using these combined systems, enormous amounts of grid electricity and carbon-dioxide emissions can be saved. Actor Network Theory (ANT) and relevant adoption models and theories will investigate consumer adoption and how this technological design is shaped by encompassing socio-cultural factors and physical realities.","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123318790","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 rapid advancement of nanotechnology contributed to revolutionising science, technology and industry in the 21 st century. Inorganic nanoparticles (NPs), due to their unique physicochemical properties, have become attractive materials for various commercial and technological applications. Using metal NPs is most commonly associated with implementing their bactericidal and bacteriostatic properties. Unfortunately, the progressive production and use of nanoproducts with such amenities significantly increase the risk of their release into the environment, where they may threaten non-target microorganisms. Unfortunately, the lack of appropriate tools makes it impossible to distinguish NPs of anthropogenic origin from those naturally occurring in the environment and perform a full risk assessment. Therefore, extensive toxicological studies using both model microorganisms and environmental strains to evaluate the biological effects of NPs are of utmost importance. The mechanisms responsible for the biocidal activity of metallic NPs are still not fully understood due to their variety and non-specific mechanisms of action. However, the response of microorganisms to NPs is believed to be mediated by numerous cellular phenomena and processes. Firstly, NPs act on the bacterial cell’s outer layers, interacting with the surface structures and leading to changes in cell membrane integrity and permeability [1,2]. The discrepancy and inconsistency of findings on this subject and the
{"title":"Unrevealing Alterations and Disturbances in Bacterial Outer Layers in Response to Metallic Nanoparticle Stress","authors":"Oliwia Metryka, D. Wasilkowski, A. Mrozik","doi":"10.11159/icnfa23.121","DOIUrl":"https://doi.org/10.11159/icnfa23.121","url":null,"abstract":"The rapid advancement of nanotechnology contributed to revolutionising science, technology and industry in the 21 st century. Inorganic nanoparticles (NPs), due to their unique physicochemical properties, have become attractive materials for various commercial and technological applications. Using metal NPs is most commonly associated with implementing their bactericidal and bacteriostatic properties. Unfortunately, the progressive production and use of nanoproducts with such amenities significantly increase the risk of their release into the environment, where they may threaten non-target microorganisms. Unfortunately, the lack of appropriate tools makes it impossible to distinguish NPs of anthropogenic origin from those naturally occurring in the environment and perform a full risk assessment. Therefore, extensive toxicological studies using both model microorganisms and environmental strains to evaluate the biological effects of NPs are of utmost importance. The mechanisms responsible for the biocidal activity of metallic NPs are still not fully understood due to their variety and non-specific mechanisms of action. However, the response of microorganisms to NPs is believed to be mediated by numerous cellular phenomena and processes. Firstly, NPs act on the bacterial cell’s outer layers, interacting with the surface structures and leading to changes in cell membrane integrity and permeability [1,2]. The discrepancy and inconsistency of findings on this subject and the","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125000477","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}
Jaztine Danielle Linato, F. Sarte, Frederico B. Dela Peña
- Lake Palakpakin is vulnerable to nutrient and sediment pollution, leading to eutrophication and siltation. Despite existing studies identifying the pollutants and detecting their concentration within the lake, their sources were generally attributed to agricultural activities, considered a nonpoint source. This research modelled the diffuse sediment and nutrient pollution affecting Lake Palakpakin, San Pablo City, Laguna using Soil and Water Analysis Tool (SWAT). This model is physically based, requiring DEM, soil map, LULC map, slope map, and meteorological data as inputs to model physical processes associated with water movement, sediment movement, nutrient cycling, etc. Due to the unsatisfactory statistical results of the calibrated model caused by insufficient hydrological data, the uncalibrated simulation was used. It revealed that the critical source areas for NO 3 -N and PO 4 are found in agricultural lands and areas that are underlain by clay and clay loam. Critical source areas were also found along the stream connecting Palakpakin lake to Laguna de Bay. Meanwhile, higher sediment yields were distinct around Sampaloc Lake and the outlet of the other lakes and in agricultural and urban areas. Moreover, the model exhibited that an increase in precipitation coincides with an increase in sediment
-帕拉巴津湖易受营养物和沉积物污染，导致富营养化和淤积。尽管现有的研究确定了污染物并检测了它们在湖中的浓度，但它们的来源通常被归因于农业活动，被认为是一种非点源。利用土壤和水分析工具(SWAT)模拟了拉古纳圣巴勃罗市帕拉帕金湖的弥漫性沉积物和营养物污染。该模型是基于物理的，需要DEM、土壤图、LULC图、坡度图和气象数据作为输入，模拟与水运动、泥沙运动、养分循环等相关的物理过程。由于水文资料不足，校正模型的统计结果不能令人满意，故采用未校正模拟。结果表明，土壤中no3 -N和po4的主要来源是农业用地和粘土和粘土壤土下垫区。沿着连接Palakpakin湖和Laguna de Bay的河流也发现了关键的源头。同时，在Sampaloc湖和其他湖泊的出水口以及农业和城市地区，产沙量明显增加。此外，模型显示降水的增加与泥沙的增加是一致的
{"title":"Modeling Diffuse Nutrient and Sediment Pollution affecting Lake Palakpakin, Laguna using QSWAT","authors":"Jaztine Danielle Linato, F. Sarte, Frederico B. Dela Peña","doi":"10.11159/icepr23.101","DOIUrl":"https://doi.org/10.11159/icepr23.101","url":null,"abstract":"- Lake Palakpakin is vulnerable to nutrient and sediment pollution, leading to eutrophication and siltation. Despite existing studies identifying the pollutants and detecting their concentration within the lake, their sources were generally attributed to agricultural activities, considered a nonpoint source. This research modelled the diffuse sediment and nutrient pollution affecting Lake Palakpakin, San Pablo City, Laguna using Soil and Water Analysis Tool (SWAT). This model is physically based, requiring DEM, soil map, LULC map, slope map, and meteorological data as inputs to model physical processes associated with water movement, sediment movement, nutrient cycling, etc. Due to the unsatisfactory statistical results of the calibrated model caused by insufficient hydrological data, the uncalibrated simulation was used. It revealed that the critical source areas for NO 3 -N and PO 4 are found in agricultural lands and areas that are underlain by clay and clay loam. Critical source areas were also found along the stream connecting Palakpakin lake to Laguna de Bay. Meanwhile, higher sediment yields were distinct around Sampaloc Lake and the outlet of the other lakes and in agricultural and urban areas. Moreover, the model exhibited that an increase in precipitation coincides with an increase in sediment","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123964688","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 work focuses on studying the interaction between a natural dye, cyanidin-3-glucoside, and the TiO2 surface in sensitized solar cells. Molecular dynamics simulations based on the reactive force field ReaxFF were employed to investigate these interactions. Various solvent environments based on water and ethanol proportions were examined. The simulation results reveal that dye chemisorption always occurs, but with differences depending on the solvent used. A more favorable stability and Ti-O bond distance were observed in systems with solvent ratios of 1:1 and 1:3, suggesting improved dye loading under these conditions. Additionally, sensitized solar cells were prepared using the same solvents utilized in the simulation, and current-voltage and IPCE measurements were performed. It was found that cells prepared with the more stable solvent ratios exhibit higher photocurrent and efficiency. Overall, the results from the molecular simulation are in agreement with the experimental data, indicating its potential for predicting the optimal solvents to use in the preparation of natural dyes based on anthocyanins.
{"title":"Molecular Dynamics Simulation as a Tool for Studying the Solvent in the Dye/TiO2 Interaction in Natural Dye Sensitized Solar Cells","authors":"Arnold A Huamán, M. Quintana","doi":"10.11159/icnfa23.125","DOIUrl":"https://doi.org/10.11159/icnfa23.125","url":null,"abstract":"- The present work focuses on studying the interaction between a natural dye, cyanidin-3-glucoside, and the TiO2 surface in sensitized solar cells. Molecular dynamics simulations based on the reactive force field ReaxFF were employed to investigate these interactions. Various solvent environments based on water and ethanol proportions were examined. The simulation results reveal that dye chemisorption always occurs, but with differences depending on the solvent used. A more favorable stability and Ti-O bond distance were observed in systems with solvent ratios of 1:1 and 1:3, suggesting improved dye loading under these conditions. Additionally, sensitized solar cells were prepared using the same solvents utilized in the simulation, and current-voltage and IPCE measurements were performed. It was found that cells prepared with the more stable solvent ratios exhibit higher photocurrent and efficiency. Overall, the results from the molecular simulation are in agreement with the experimental data, indicating its potential for predicting the optimal solvents to use in the preparation of natural dyes based on anthocyanins.","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125545563","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}
Extended Abstract Treatment of As(III) can be a challenging task due to its high mobility and small affinity to mineral surfaces and that pre-oxidation step to As(V) is necessary for enhancing removal efficiency[1]. In this study, Fe-Mn oxide was synthesized through chemical precipitation in solutions with varying concentrations of FeCl 3 • 4H 2 O and MnO 2 • 4H 2 O for oxidative adsorption of As(III) in aqueous solution. The synthesized Fe-Mn oxide mineral possessed oxidation property rendered from manganese dioxide phases and adsorption capacity from the iron oxide phases. The Fe-Mn oxide was characterized for surface area, morphology, composition, and magnetic property and bench scale laboratory experiments were carried out to investigate potential utility of the mineral in treating As(III) under the mineral dose of 1 g/L and 1mg/L As(III). The results of kinetic experiments revealed the oxidation of As(III) occurred in very short period time (less than 30 min.), followed by adsorption to iron oxide phase, with its removal efficiency being the highest for the mineral synthesized under 1:0.25 Fe:Mn condition. The maximum adsorption capacity determined from isotherm experiments was found to be 200 mg/g. The removal of As(V) remained relatively constant in the pH 3-6 at around 60% removal but dramatically decreased when pH was raise to 10. The ionic strength in the range of 0.001-0.1 M NaNO 3 and the presence of competing anion (0.1-1 mM PO 43) had little effect on the As(III) removal. The overall results of this study demonstrated the potential utility of the Fe-Mn oxide for treatment on the As(III) in field applications for high removal
{"title":"Oxidative adsorption of arsenic by Fe-Mn oxides","authors":"J. Kim","doi":"10.11159/icepr23.108","DOIUrl":"https://doi.org/10.11159/icepr23.108","url":null,"abstract":"Extended Abstract Treatment of As(III) can be a challenging task due to its high mobility and small affinity to mineral surfaces and that pre-oxidation step to As(V) is necessary for enhancing removal efficiency[1]. In this study, Fe-Mn oxide was synthesized through chemical precipitation in solutions with varying concentrations of FeCl 3 • 4H 2 O and MnO 2 • 4H 2 O for oxidative adsorption of As(III) in aqueous solution. The synthesized Fe-Mn oxide mineral possessed oxidation property rendered from manganese dioxide phases and adsorption capacity from the iron oxide phases. The Fe-Mn oxide was characterized for surface area, morphology, composition, and magnetic property and bench scale laboratory experiments were carried out to investigate potential utility of the mineral in treating As(III) under the mineral dose of 1 g/L and 1mg/L As(III). The results of kinetic experiments revealed the oxidation of As(III) occurred in very short period time (less than 30 min.), followed by adsorption to iron oxide phase, with its removal efficiency being the highest for the mineral synthesized under 1:0.25 Fe:Mn condition. The maximum adsorption capacity determined from isotherm experiments was found to be 200 mg/g. The removal of As(V) remained relatively constant in the pH 3-6 at around 60% removal but dramatically decreased when pH was raise to 10. The ionic strength in the range of 0.001-0.1 M NaNO 3 and the presence of competing anion (0.1-1 mM PO 43) had little effect on the As(III) removal. The overall results of this study demonstrated the potential utility of the Fe-Mn oxide for treatment on the As(III) in field applications for high removal","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129234639","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}
Extended Abstract The increasing soil pollution with heavy metals requires new and sustainable remediation solutions. Biochar, an environmentally friendly carbon material derived from various biomasses, has recently been used as a soil amendment to immobilize heavy metals in polluted soils. Despite the recognized benefits of biochar, its adsorption and immobilization efficiency still needs to be improved. Recently, ball milling has been considered as an environmentally friendly technology for biochar modification. Mechanical grinding of biochar into fine micro-and nano-sized particles can improve the physical and chemical properties of biochar in terms of metal adsorption [1, 2]. Therefore, testing of ball-milled biochar for metal immobilization in polluted soils is crucial for the development of nanoremediation. The objective of this work was to compare selected properties of pristine and ball-milled biochars and their effect on selected soil properties and leachability of metals from soil polluted by the smelting industry.
{"title":"Ball-Milled Biochar and Its Effect on Remediation of Soil from Industrial Area","authors":"M. Gusiatin, Sanubar Khasmammadova","doi":"10.11159/icepr23.129","DOIUrl":"https://doi.org/10.11159/icepr23.129","url":null,"abstract":"Extended Abstract The increasing soil pollution with heavy metals requires new and sustainable remediation solutions. Biochar, an environmentally friendly carbon material derived from various biomasses, has recently been used as a soil amendment to immobilize heavy metals in polluted soils. Despite the recognized benefits of biochar, its adsorption and immobilization efficiency still needs to be improved. Recently, ball milling has been considered as an environmentally friendly technology for biochar modification. Mechanical grinding of biochar into fine micro-and nano-sized particles can improve the physical and chemical properties of biochar in terms of metal adsorption [1, 2]. Therefore, testing of ball-milled biochar for metal immobilization in polluted soils is crucial for the development of nanoremediation. The objective of this work was to compare selected properties of pristine and ball-milled biochars and their effect on selected soil properties and leachability of metals from soil polluted by the smelting industry.","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116193949","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}
Extended Abstract Environmental contamination caused by mercury - due to its mobility and long residence time in the soil and atmosphere [1] - is an emerging problem worldwide [2]. To treat and remove the contaminant from the soil, different techniques have been implemented, both in laboratory, pilot and full-scale applications. One of the most promising approach for mercury removal is thermal desorption, a treatment technology that utilizes heat to increase the volatility of contaminants which are subsequently removed from the solid matrix and treated in an off-gas treatment system [3]. In this work we analysed and treated a soil from an industrial area with high levels of mercury contamination, mostly in the forms of elemental mercury (24-67%) and insoluble inorganic mercury (32-73%). To understand the most effective remediation strategy, a series of tests have been performed on a different number of soil samples. The soil was collected via core drilling up to a depth of 5 metres, and each 1 metre layer was characterized in terms of total mercury contamination, dry residue, humidity, sieve fraction (less than 2 cm and more than 2 mm), and a mercury speciation was performed. After a first characterization, the layer with the highest mercury contamination was identified and 10 kg of material was selected for the subsequent analysis. A composite sample was obtained via mixing of the whole layers cored, including the high polluted stratum, and 30 kg of material was collected for analysis. A series of laboratory tests were performed on the samples from both the most
{"title":"Optimization Of Mercury Remediation From A Contaminated Industrial Park Soil Via Thermo Desorption: An Experimental Approach","authors":"A. Pacini, A. D. F. D’Auris, A. Conte","doi":"10.11159/icepr23.112","DOIUrl":"https://doi.org/10.11159/icepr23.112","url":null,"abstract":"Extended Abstract Environmental contamination caused by mercury - due to its mobility and long residence time in the soil and atmosphere [1] - is an emerging problem worldwide [2]. To treat and remove the contaminant from the soil, different techniques have been implemented, both in laboratory, pilot and full-scale applications. One of the most promising approach for mercury removal is thermal desorption, a treatment technology that utilizes heat to increase the volatility of contaminants which are subsequently removed from the solid matrix and treated in an off-gas treatment system [3]. In this work we analysed and treated a soil from an industrial area with high levels of mercury contamination, mostly in the forms of elemental mercury (24-67%) and insoluble inorganic mercury (32-73%). To understand the most effective remediation strategy, a series of tests have been performed on a different number of soil samples. The soil was collected via core drilling up to a depth of 5 metres, and each 1 metre layer was characterized in terms of total mercury contamination, dry residue, humidity, sieve fraction (less than 2 cm and more than 2 mm), and a mercury speciation was performed. After a first characterization, the layer with the highest mercury contamination was identified and 10 kg of material was selected for the subsequent analysis. A composite sample was obtained via mixing of the whole layers cored, including the high polluted stratum, and 30 kg of material was collected for analysis. A series of laboratory tests were performed on the samples from both the most","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114658296","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}
V. Botthoulath, I. F. Dalmacio, N. Lantican, L. Villegas, F. Elegado, M. Diaz, Lawrence Yues Cheng Uy
Lactic acid bacteria (LAB) are used as starter cultures in many fermentation processes because, aside from their potential probiotic properties, they are known to improve the nutritional value of food by enhancing their organoleptic properties and stability [1]. Bamboo shoots are one of the most popular foods in Lao PDR and many ASEAN countries. Adding probiotic bacteria to the natural fermentation process of foods such as bamboo shoots, can enhance their nutrient value and reduce health risks from contamination. This aligns with the Sustainable Development Goals (SDGs) 1, 2
{"title":"Improving the quality of Lao fermented bamboo shoot (Nor Mai Som) using probiotic Lactiplantibacillus plantarum BBS13 as starter culture","authors":"V. Botthoulath, I. F. Dalmacio, N. Lantican, L. Villegas, F. Elegado, M. Diaz, Lawrence Yues Cheng Uy","doi":"10.11159/icbb23.123","DOIUrl":"https://doi.org/10.11159/icbb23.123","url":null,"abstract":"Lactic acid bacteria (LAB) are used as starter cultures in many fermentation processes because, aside from their potential probiotic properties, they are known to improve the nutritional value of food by enhancing their organoleptic properties and stability [1]. Bamboo shoots are one of the most popular foods in Lao PDR and many ASEAN countries. Adding probiotic bacteria to the natural fermentation process of foods such as bamboo shoots, can enhance their nutrient value and reduce health risks from contamination. This aligns with the Sustainable Development Goals (SDGs) 1, 2","PeriodicalId":398088,"journal":{"name":"Proceedings of the 9th World Congress on New Technologies","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125925039","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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