IOP Conference Series: Earth and Environmental Science最新文献_第3页

Trihalomethane formation potentials from the effluent of different wastewater treatment sources 不同废水处理源的废水中三卤甲烷形成的可能性

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012031

K. Phlaengsattra, V. Kanokkantapong, J. Sangsanont

{"title":"Trihalomethane formation potentials from the effluent of different wastewater treatment sources","authors":"K. Phlaengsattra, V. Kanokkantapong, J. Sangsanont","doi":"10.1088/1755-1315/1372/1/012031","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012031","url":null,"abstract":"\u0000 Reused wastewater is commonly treated with disinfection to remove pathogenic microorganisms; however, this process generates disinfection byproducts (DBPs), such as trihalomethanes (THMs). This study aimed to investigate the levels of THMs and THM formation potential (THMFP) in treated wastewater originating from different sources i.e., domestic, food-processing industry and hospital. The samples from each source were collected three times between June and August 2023. Dissolved organic carbon (DOC) was evaluated from the samples prior to and after disinfection with chlorine over a period of 7 days. The results found that the concentration of DOC was highest in hospital effluent, with an average value of 5.60±0.16 mg/L followed by effluent from the food-processing industry and domestic, which had average DOC concentrations of 4.60±1.39 mg/L and 4.46±0.37 mg/L, respectively. The concentration of THMs in hospital effluent was found the highest at 6.91±0.88 µg/L followed by effluent from the domestic and food-processing industries, which exhibited amounts of 6.74±0.77 µg/L and 5.25±0.77 µg/L, respectively. In contrast, the food-processing factory had the highest concentration of THMFP at 299.39±26.54 µg/L, while the domestic and hospital effluent displayed a lower concentration of 133.64±36.86 µg/L and 51.48±9.01 µg/L, respectively.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"15 25","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141700158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of pyrolysis characteristics and kinetic parameters from several prospected biomass residues by thermogravimetric analysis 通过热重分析评估几种预期生物质残渣的热解特性和动力学参数

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012028

S. Pambudi, J. S. Jongyingcharoen, W. Saechua

{"title":"Evaluation of pyrolysis characteristics and kinetic parameters from several prospected biomass residues by thermogravimetric analysis","authors":"S. Pambudi, J. S. Jongyingcharoen, W. Saechua","doi":"10.1088/1755-1315/1372/1/012028","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012028","url":null,"abstract":"\u0000 With fossil fuel supplies dwindling and persistent environmental concerns surrounding their consumption, biomass has emerged as a highly promising renewable energy source. Understanding the characteristics of biomass pyrolysis is crucial as it provides valuable insights and guidance for designing and optimizing the pyrolysis process. In this regard, a thermogravimetric assessment was conducted to evaluate the pyrolysis characteristics and kinetic parameters of four prospective biomass sources: Yang Na wood (Dipterocarpus alatus), palmyra palm shell, cotton stalk, and spent coffee grounds with a condition temperature range of 33 °C to 700 °C and a heating rate of 10 °C·min-1 in a nitrogen atmosphere. The kinetic parameters were evaluated using the Coats and Redfern methods, employing various reaction order models. The activation energy and pre-exponential factor were determined for the active pyrolysis stage. The results revealed that the high heating values for all samples ranged from 18.20 to 23.00 MJ·kg-1. Additionally, the onset temperature fell within the range of 243 to 254 °C, while the offset temperature ranged from 365 to 452 °C for all samples. The conversion rate at the offset temperature was 0.67 for Yang Na wood, 0.62 for palmyra palm shell, 0.65 for cotton stalk, and 0.74 for spent coffee grounds. Moreover, the activation energies were measured as 46.47 kJ·mol-1 for Yang Na wood, 52.46 kJ·mol-1 for palmyra palm shell, 64.20 kJ·mol-1 for cotton stalk, and 69.01 kJ·mol-1 for spent coffee grounds. The higher activation energy corresponded to a higher pre-exponential factor. In conclusion, the pyrolysis characteristics and kinetic parameters of the four types of biomasses have been found to be favourable, indicating their potential for promotion and application as a raw material for the pyrolysis process.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"19 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141701845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reinforcement learning optimal control method for multi chiller HVAC system in an existing office building 现有办公楼多冷水机组暖通空调系统的强化学习优化控制方法

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012096

H Y Wang, Q. Ge, C Ma, T. Cui

{"title":"Reinforcement learning optimal control method for multi chiller HVAC system in an existing office building","authors":"H Y Wang, Q. Ge, C Ma, T. Cui","doi":"10.1088/1755-1315/1372/1/012096","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012096","url":null,"abstract":"\u0000 Given that buildings consume approximately 33% of global energy, and HVAC systems contribute nearly half of a building’s total energy demand, optimizing their efficiency is imperative for sustainable energy use. Many existing buildings operate HVAC systems inefficiently, displaying non-stationary behavior. Current reinforcement learning (RL) training methods rely on historical data, which is often obtained through costly modeling or trial-and-error methods in real buildings. This paper introduces a novel reinforcement learning construction framework designed to improve the robustness and learning speed of RL control while reducing learning costs. The framework is specifically tailored for existing office buildings. Applying this framework to control HVAC systems in real office buildings in Beijing, engineering practice results demonstrate: during the data collection phase, energy efficiency surpasses traditional rule-based control methods from the previous year, achieving significantly improved energy performance (a 17.27% reduction) with minimal comfort sacrifices. The system achieves acceptable robustness, learning speed, and control stability. Reduced ongoing manual supervision leads to savings in optimization labor. Systematic exploration of actions required for RL training lays the foundation for RL algorithm development. Furthermore, by leveraging collected data, a reinforcement learning control algorithm is established, validating the reliability of this approach. This construction framework reduces the prerequisites for historical data and models, providing an acceptable alternative for systems with insufficient data or equipment conditions.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"11 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141705553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sensitivity analysis on heat pump - mechanical vapor recompression desalination system by recovering waste heat of offshore power converter station 通过回收海上换流站废热对热泵-机械蒸汽再压缩海水淡化系统的敏感性分析

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012050

C. Y. Shi, X W Hu, S M Dong, X Y Fu, T. Liu, M S Jin

{"title":"Sensitivity analysis on heat pump - mechanical vapor recompression desalination system by recovering waste heat of offshore power converter station","authors":"C. Y. Shi, X W Hu, S M Dong, X Y Fu, T. Liu, M S Jin","doi":"10.1088/1755-1315/1372/1/012050","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012050","url":null,"abstract":"\u0000 Offshore wind power converter stations produce massive low-temperature waste heat, which can hardly be used constrained by their offshore location. Therefore, the recovery of the waste heat has been raising widespread concern. Meanwhile, a large amount of fresh water is needed for its cooling system. So, a novel system combining high temperature heat pump and a mechanical vapor recompression system (HP-MVR) was proposed, and sensitivity analysis was performed to optimize it. The heat pump was used to absorb the waste heat and to produce high temperature water. The mechanical vapor recompression system was adopted to produce fresh water and to recover the condensation heat from the steam. In order to determine the impact parameters on the two crucial performance indicators of freshwater production and unit energy consumption, this article introduces a sensitivity analysis method, focusing on analyzing the sensitivity of the three operating parameters of heat pump condensation temperature, saturated water vapor inlet temperature entering the compressor, and freshwater condensation temperature to these two performance indicators. The results show that the sensitivity coefficients of heat pump condensation temperature, saturated water vapor inlet temperature entering the compressor, and freshwater condensation temperature are 1.13, -0.26, and 1.56. So, the freshwater condensation temperature has the most significant effect on freshwater output. Their sensitivity coefficients to unit energy consumption are 1.02, 1.41, and -0.64. The saturated water vapor inlet temperature entering the compressor has the most significant impact on the required power consumption per unit of freshwater. It will give some guidance for the application of low-temperature waste heat in seawater desalination and the reduction of operating costs.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141706545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing thermal comfort in buildings through the integration of phase change material on the building envelope: a simulation study 通过在建筑围护结构中融入相变材料提高建筑物的热舒适度：模拟研究

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012089

U. Bordoloi, B. Das

{"title":"Enhancing thermal comfort in buildings through the integration of phase change material on the building envelope: a simulation study","authors":"U. Bordoloi, B. Das","doi":"10.1088/1755-1315/1372/1/012089","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012089","url":null,"abstract":"\u0000 According to the report published by the International Energy Agency (IEA), active space cooling and air conditioning systems consume approximately 16% of the building sector’s final electricity consumption and contribute 3.94% of global greenhouse gas emissions. In this regard, the use of low-cost but effective passive solutions, such as organic phase change materials (PCM) on the building envelope, can provide high thermal mass and thus can lower the temperature fluctuation inside the building. In the current study, the potential of PCM-enhanced building envelopes to enhance thermal comfort has been studied. The study has been performed using the conduction finite difference (ConFD) algorithm in EnergyPlus software. A comparative study has been done for a traditional reinforced cement concrete (RCC) reference test room of size (5m x 6m x 3m) and another room of the same size with PCM-enhanced walls for the hot and humid climate zone of Guwahati (latitude 26.1, longitude 91.7), in India. A PCM thickness of 20 mm is used at the external surface of the wall between the red clay burnt brick (120 mm in thickness) and the cement plaster (25mm thick). The PCM used for the study is a biocomposite PCM, named WH-PCM, with a melting point of 31.5°C and thermal conductivity of 0.27 W/mK. The simulation results reveal that the R-value of the external wall of the room with PCM walls has been increased by 84.90% compared to the reference room with the incorporation of WH-PCM, resulting in a mean zone temperature difference of 0.3°C throughout the year. Also, the indoor thermal discomfort hours have been annually reduced by 15.82% with the use of WH-PCM when compared with the reference room. A similar temperature difference trend, which is 1.93°C, is also observed in the single PCM brick experimental result under identical testing conditions as a regular brick of the same size.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"54 S1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of response surface method (RSM) to investigate the effects of process parameters on the microstructures and specific surface area of hierarchical 3D nanostructured NiCo2O4 electrocatalyst synthesized through hydrothermal method 应用响应面法（RSM）研究工艺参数对水热法合成的分层三维纳米结构镍钴氧化物电催化剂微观结构和比表面积的影响

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012103

N.F. Raduwan, N. Shaari, M.S. Masdar

{"title":"Application of response surface method (RSM) to investigate the effects of process parameters on the microstructures and specific surface area of hierarchical 3D nanostructured NiCo2O4 electrocatalyst synthesized through hydrothermal method","authors":"N.F. Raduwan, N. Shaari, M.S. Masdar","doi":"10.1088/1755-1315/1372/1/012103","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012103","url":null,"abstract":"\u0000 The hierarchical 3D nanostructured NiCo2O4 was successfully synthesized through facile hydrothermal method for fuel cell electrocatalysis. It was observed that the specific surface area of NiCo2O4 was strongly influenced by the synthesizing parameters namely temperature (T) and reaction time (t) in hydrothermal process. A high specific surface area in electrocatalyst materials is crucial for maximizing the efficiency and effectiveness of electrochemical reactions by providing more active sites, improving reactivity, enhancing mass transport, and reducing the utilization of expensive catalyst materials. The response surface method (RSM) coupled with central composite design (CCD) was utilised to statistically specify the effects of the reaction time and temperature on the specific surface area of the synthesized NiCo2O4. The optimum synthesize parameters of T = 188.41 °C and t = 12.86 hours were performed to obtain the highest specific surface area of 166.98 m2 g-1 which demonstrated the RSM was an excellent tool to implement and tailor the specific surface area of NiCo2O4. Finally, a mathematical model was derived to predict the relationship between these parameters and the structural properties. This study proved that the optimum hydrothermal parameters improved the final electrocatalyst structures based on numerical analysis and validated by the observation from field emission scanning electron microscopy and calculation from Brunauer–Emmett–Teller (BET) measurement.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"179 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrogen sulphide removal from raw biogas using novel coconut husk and sugarcane bagasse composite biochar adsorbent 利用新型椰壳和甘蔗渣复合生物炭吸附剂去除原料沼气中的硫化氢

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012040

B. Das, S. Basumatary, P. Kalita

{"title":"Hydrogen sulphide removal from raw biogas using novel coconut husk and sugarcane bagasse composite biochar adsorbent","authors":"B. Das, S. Basumatary, P. Kalita","doi":"10.1088/1755-1315/1372/1/012040","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012040","url":null,"abstract":"\u0000 The presence of water, hydrogen sulfide (H2S), ammonia, oxygen, nitrogen, and siloxanes in biogas is not desirable for thermal and electrical applications through the engine route. H2S adversely affects engines and fuel cells by causing corrosion on metal components, poisoning catalytic converters, and accelerating wear and tear, compromising performance and longevity. To meet specific quality requirements for diverse applications such as heating, combined heat and power generation, vehicle fuel, and fuel cells, biogas must undergo cleaning and upgrading processes. Using biochar to remove H2S in biogas is a comparatively new technique and can be a promising option for small-scale, decentralized units. Current research primarily investigates the potential of biochar derived from coconut husk (CH) and sugarcane bagasse (SB) for effectively removing H2S from raw biogas within an experimental framework. The selection of a composite material consisting of equal parts CH and SB was based on available literature and material accessibility. The integrated methodology provided comprehensive insights into the performance of biochars in biogas purification. Morphological analysis elucidated the role of pore structure in facilitating H2S removal, while CHNS analysis highlighted the influence of elemental composition on biochar reactivity. Additionally, pH studies underscored the potential for biochar application to mitigate biogas acidity. According to the findings, the biochar from the combination of CH and SB exhibited a removal efficiency of 77.60% for H2S in raw biogas.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"48 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141716434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocoagulation treatment for Remazol Brilliant Blue R (Reactive Blue 19) removal of textile dye simulated wastewater using iron-aluminum electrodes 使用铁铝电极进行电凝处理，去除纺织染料模拟废水中的雷马佐亮蓝 R（活性蓝 19

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012026

K. D. Cruz, S. L. A. Camacho, H. M. P. Rodenas

{"title":"Electrocoagulation treatment for Remazol Brilliant Blue R (Reactive Blue 19) removal of textile dye simulated wastewater using iron-aluminum electrodes","authors":"K. D. Cruz, S. L. A. Camacho, H. M. P. Rodenas","doi":"10.1088/1755-1315/1372/1/012026","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012026","url":null,"abstract":"\u0000 The presence of non-biodegradable dyes, such as Remazol Brilliant Blue R (Reactive Blue 19), in wastewater poses a significant environmental challenge. This study investigates the application of electrocoagulation using iron-aluminum (Fe-Al) electrodes to efficiently remove Reactive Blue 19 dye from simulated textile dye wastewater. It considers various parameters such as electrode material, current, stirring speed, as well as the influence of sodium chloride acting as a supporting electrolyte to enhance conductivity. Additionally, it evaluates the economic feasibility through electrode consumption analysis. The experimental setup involved a designed reactor with aluminum and iron electrodes arranged at bipolar parallel connection, along with a 30-minute electrocoagulation process conducted at ambient temperature and subsequent filtration of the treated wastewater for UV-VIS analysis. The optimal parameter combination obtained consists of Fe-Al electrode material, a 3 A current, and a 200-rpm stirring speed, achieving 96.87% dye removal. Furthermore, extending the operating time to 60 minutes improved the removal by 99.15%. Under these optimal conditions, the energy consumption measured was 36 kWh/m3. The high dye removal rate obtained shows the effectiveness of this electrocoagulation process in treating Reactive Blue 19 simulated wastewater. A t-test, employed as a hypothesis testing technique with a significance level of 0.05, confirmed the optimal levels of the factors and interactions within the treatment process. A remarkable coefficient of determination of 0.9794 in the dye removal sensitivity analysis signifies a strong goodness of fit, indicating that these three (3) parameters collectively explain how they affect the outcome while accounting for dye removal efficiency variation. These results showed that electrocoagulation is a promising technology for treatment of Reactive Blue 19 dye wastewater.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"346 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface wettability control of bubble flow guide for a thin aqueous electrolyte layer of solar photoelectrochemical reactors 太阳能光电化学反应器水性电解质薄层气泡导流器的表面润湿性控制

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012002

Yuki Kameya, Ryosuke Hasegawa, Tatsuya Osawa

{"title":"Surface wettability control of bubble flow guide for a thin aqueous electrolyte layer of solar photoelectrochemical reactors","authors":"Yuki Kameya, Ryosuke Hasegawa, Tatsuya Osawa","doi":"10.1088/1755-1315/1372/1/012002","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012002","url":null,"abstract":"\u0000 Hydrogen is a promising energy carrier as no carbon dioxide is emitted during its use in fuel cells or combustion. Solar photoelectrochemical water splitting is a potential process for producing renewable hydrogen. Herein, energy transport phenomena are addressed for the future design of large-scale reactors. First, we show that the thickness of the aqueous electrolyte layer is an essential factor for utilizing the full spectrum of solar radiation. The transport of solar irradiation through the aqueous electrolyte is theoretically analysed. Next, based on the measurement of light transmission through hydrogen bubbles generated from a hydrogen evolving electrode, the energy loss caused by the bubbles covering a photoelectrode is discussed. The bubble size distributions at practical current densities are also presented. Then, a bubble flow guide for controlling the stream of bubbles in a thin electrolyte layer is proposed. A design strategy and experimental results verifying the performance of the bubble flow guide are presented. We demonstrate that surface wettability and inclination angle are important for designing an effective bubble flow guide. We examine the surface wettability control using hydrophilic coatings in detail. Changes in the water contact angles as well as bubble adhesion forces on the coated surfaces are demonstrated. In addition, the current experimental method can be used to identify essential issues in photoelectrochemical processes. Because bubble trapping and growth in a flow guide are reflected in the electrode potential variation, the discussion of electrode potential variation would be useful for further developing bubble flow guides. Overall, this study demonstrates the potential for developing and designing solar photoelectrochemical reactors.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"42 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141690231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Waste separation intention of households in Sri Lanka 斯里兰卡家庭的垃圾分类意向

IOP Conference Series: Earth and Environmental Science Pub Date : 2024-07-01 DOI: 10.1088/1755-1315/1372/1/012041

S. Shukri, D. M. Jayasena

{"title":"Waste separation intention of households in Sri Lanka","authors":"S. Shukri, D. M. Jayasena","doi":"10.1088/1755-1315/1372/1/012041","DOIUrl":"https://doi.org/10.1088/1755-1315/1372/1/012041","url":null,"abstract":"\u0000 The effective practice of waste separation at the source is crucial for achieving sustainable development and promoting the reduce, reuse, and recycle concept. This practice should be adopted by both households and business organisations. The primary objective of this study is to investigate the factors that influence the intention of waste separation at the household level in Sri Lanka. For this purpose, a random selection of 388 households representing the entire country was undertaken. Independent variables, including attitude, perceived cost benefits, moral norms, inconvenience, and rules and regulations, were examined in relation to their impact on the dependent variable, which was the intention of waste separation. A 5-point Likert scale questiommaire was utilised to assess each of these variables. The methodology employed in this study included principal component analysis, factor analysis, and Structural Equation Model (SEM) to establish the underlying model. The results of the analysis revealed the significance of attitude, perceived cost benefits, and moral norms at a 5% significance level. Interestingly, although inconvenience exhibited a negative influence on intention, its significance was not established. Furthermore, while existing literature commonly attributed local government rules and regulations as a significant factor, the model indicated a positive and insignificant relationship. In conclusion, this study underscores the importance of positive attitudes, perceived benefits in terms of cost, and adherence to moral norms in fostering the intention for waste separation. Despite the negative impact of inconvenience not reaching statistical significance, it remains a noteworthy consideration. Additionally, the unexpected positive and insignificant relationship with local government rules and regulations prompts further exploration.","PeriodicalId":506254,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141705117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0