The Coordinated management of solid waste dumps from different anthropogenic environments is important for pollution management of immediate and adjacent ecosystems. This study took three soil profile samples from three functional zones: the rural, the suburban, and the urban solid waste dumps. The samples were analyzed for the concentration, origin, and associated risks of thirty-nine Polybrominated diphenyl ethers (Ʃ39PBDEs). Σ39PBDEs demonstrated high concentrations and ranged from 0.12 to 119 ng g−1 dw, in the order of rural > suburban > urban, and topsoil > subsoil > bottom soil. BDE-10, -11, -13, -15, -17, -99 and -119 showed relative abundance. Penta-BDE was moderately above standard and screening levels and demonstrated high and medium ecological risk in the rural and semi-urban zones. The non-carcinogenic and cancer risks highlight onsite exposure risks. PCA evaluation depicts an abundance of persistent and toxic flame retardant additives, and cluster analysis showed PBDEs were from a common source—cancer and hazard index exposure risk depicted rural > suburban > urban zone. The results suggested the continual use of banned flame retardant additives in commercial formulations. A comparison of PBDE implied that PBDEs in the suburban and urban zones could have undergone environmental processes, and the rural zone received fresh deposition. Migration and exposure to the detected -BDEs may increase the risk to humans in these zones. The results highlighted the need to establish a standard management protocol and monitor legacy pollutants in environmental and biological samples around solid waste dump sites and similar catchments.
{"title":"Insights into polybrominated diphenyl ethers: occurrence, sources, and exposure health risk in selected solid waste impacted soils","authors":"","doi":"10.30955/gnj.005436","DOIUrl":"https://doi.org/10.30955/gnj.005436","url":null,"abstract":"The Coordinated management of solid waste dumps from different anthropogenic environments is important for pollution management of immediate and adjacent ecosystems. This study took three soil profile samples from three functional zones: the rural, the suburban, and the urban solid waste dumps. The samples were analyzed for the concentration, origin, and associated risks of thirty-nine Polybrominated diphenyl ethers (Ʃ39PBDEs). Σ39PBDEs demonstrated high concentrations and ranged from 0.12 to 119 ng g−1 dw, in the order of rural > suburban > urban, and topsoil > subsoil > bottom soil. BDE-10, -11, -13, -15, -17, -99 and -119 showed relative abundance. Penta-BDE was moderately above standard and screening levels and demonstrated high and medium ecological risk in the rural and semi-urban zones. The non-carcinogenic and cancer risks highlight onsite exposure risks. PCA evaluation depicts an abundance of persistent and toxic flame retardant additives, and cluster analysis showed PBDEs were from a common source—cancer and hazard index exposure risk depicted rural > suburban > urban zone. The results suggested the continual use of banned flame retardant additives in commercial formulations. A comparison of PBDE implied that PBDEs in the suburban and urban zones could have undergone environmental processes, and the rural zone received fresh deposition. Migration and exposure to the detected -BDEs may increase the risk to humans in these zones. The results highlighted the need to establish a standard management protocol and monitor legacy pollutants in environmental and biological samples around solid waste dump sites and similar catchments. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"267 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140447465","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}
Streamflow of the Murray River (MR) was investigated from 1978 to 2017, using statistical analysis based on Indian Ocean modes of variability. During the cool season, June to August (JJA), observations and reanalysis products have been used to analyse the relation of streamflow of MR with Indian Ocean High (IOH) and Southern Annular Mode (SAM) over South Australia (SA). Recently, the river has suffered from severe drought, whereas drought drivers differ significantly in terms of interannual and decadal timescales. As a defining feature of atmospheric general circulation, the IOH is quantitatively simulated in all global climate models. Variations in the streamflow of MR have been linked to the variability of intensity and positions of Indian Ocean high pressure (IOHP) meridionally and the impact of SAM across the Indian Ocean. It is found that the correlation of streamflow with IOHP is (r = -0.41), SAM (r = -0.52) and shows the strongest correlation with Indian Ocean High Longitude (IOHLN), which is -0.56. Moreover, SAM explains only 27% of streamflow variability, while IOHP and IOHLN indices calculated by the Center of Action (COA) approach explain 39% of the variation. This paper examines the decline of the inflow rate of MR in SA by applying the COA approach, Mann-Kendall (MK) test and Pearson correlation. We further investigate the impact of significant predictors over the flow of MR. Inflow rate of the hydrology of MR is influenced by the period of time, which shows a decreasing trend with -1.976 by applying autocorrelation. Overall, monthly and annual streamflows have also investigated a significant decreasing trend. Cross-correlation is also used to verify the relationship between streamflow and significant predictors of MR.
{"title":"A multiregressed COA-SAM model for predicting seasonal streamflow variability: A case study over Murray river basin","authors":"","doi":"10.30955/gnj.005329","DOIUrl":"https://doi.org/10.30955/gnj.005329","url":null,"abstract":"Streamflow of the Murray River (MR) was investigated from 1978 to 2017, using statistical analysis based on Indian Ocean modes of variability. During the cool season, June to August (JJA), observations and reanalysis products have been used to analyse the relation of streamflow of MR with Indian Ocean High (IOH) and Southern Annular Mode (SAM) over South Australia (SA). Recently, the river has suffered from severe drought, whereas drought drivers differ significantly in terms of interannual and decadal timescales. As a defining feature of atmospheric general circulation, the IOH is quantitatively simulated in all global climate models. Variations in the streamflow of MR have been linked to the variability of intensity and positions of Indian Ocean high pressure (IOHP) meridionally and the impact of SAM across the Indian Ocean. It is found that the correlation of streamflow with IOHP is (r = -0.41), SAM (r = -0.52) and shows the strongest correlation with Indian Ocean High Longitude (IOHLN), which is -0.56. Moreover, SAM explains only 27% of streamflow variability, while IOHP and IOHLN indices calculated by the Center of Action (COA) approach explain 39% of the variation. This paper examines the decline of the inflow rate of MR in SA by applying the COA approach, Mann-Kendall (MK) test and Pearson correlation. We further investigate the impact of significant predictors over the flow of MR. Inflow rate of the hydrology of MR is influenced by the period of time, which shows a decreasing trend with -1.976 by applying autocorrelation. Overall, monthly and annual streamflows have also investigated a significant decreasing trend. Cross-correlation is also used to verify the relationship between streamflow and significant predictors of MR. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"58 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139685074","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}
Vermicomposting is a mesophilic biooxidation and stabilization process of organic materials that involves the joint action of earthworm and microorganism. An experiment was conducted to prepare vermicompost using partially decomposed organic waste such as MSW, fruit waste, vegetable waste and yard waste by employing indigenous earthworm species. This research has been done for reducing the environmental issues, pollution problems due to solid waste and industrial waste i.e., wastewater and sludge by converting it into compost by using earthworms very successfully and economically. Non-toxic and organic industrial wastes could be potential raw material for vermicomposting. In the past few years, vermicomposting has been used for the management of industrial wastes and sludges and to convert them into vermicompost for land restoration practices. The earthworms used were Eudrillus euginea. In this study the industrial sludge and effluent from dairy industry was mixed with organic waste with different ratio. This process was done under the controlled conditions of pH, moisture content and temperature. In this process partially decomposed organic waste were broken down and fragmented rapidly by earthworms resulting in a stable non-toxic material with good structure which has a potentially high economic value as soil conditioner for plant growth. The results reveal the increased nutrient content, increased worm population and decreased processing days of the waste in the order of dairy waste with organic waste. The main objectives of this study include to find viable management techniques for organic as well as industrial waste and to make a detailed analysis of the route of stabilization with observations such as temperature, pH, EC, COD, TS, VS, AC and C/N. and to produce good quality biofertilizer fixed by nutritive values.
{"title":"Experimental study of biodegradability of organic waste with industrial waste combined with effluents: a comparison by vermicomposting technology","authors":"","doi":"10.30955/gnj.005480","DOIUrl":"https://doi.org/10.30955/gnj.005480","url":null,"abstract":"Vermicomposting is a mesophilic biooxidation and stabilization process of organic materials that involves the joint action of earthworm and microorganism. An experiment was conducted to prepare vermicompost using partially decomposed organic waste such as MSW, fruit waste, vegetable waste and yard waste by employing indigenous earthworm species. This research has been done for reducing the environmental issues, pollution problems due to solid waste and industrial waste i.e., wastewater and sludge by converting it into compost by using earthworms very successfully and economically. Non-toxic and organic industrial wastes could be potential raw material for vermicomposting. In the past few years, vermicomposting has been used for the management of industrial wastes and sludges and to convert them into vermicompost for land restoration practices. The earthworms used were Eudrillus euginea. In this study the industrial sludge and effluent from dairy industry was mixed with organic waste with different ratio. This process was done under the controlled conditions of pH, moisture content and temperature. In this process partially decomposed organic waste were broken down and fragmented rapidly by earthworms resulting in a stable non-toxic material with good structure which has a potentially high economic value as soil conditioner for plant growth. The results reveal the increased nutrient content, increased worm population and decreased processing days of the waste in the order of dairy waste with organic waste. The main objectives of this study include to find viable management techniques for organic as well as industrial waste and to make a detailed analysis of the route of stabilization with observations such as temperature, pH, EC, COD, TS, VS, AC and C/N. and to produce good quality biofertilizer fixed by nutritive values. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484803","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}
Over the past few decades, pharmaceuticals have contaminated the marine ecosystem. The entry of prescription medications into the environment, their underlying causes and problems, and effective methods for treating such contaminated water are all evaluated in this study. Adsorption is becoming a more popular preferred treatment method because, compared to other post-secondary treatments, it has less strength requirements and is easier to use. Despite being extensively researched as a chemosorptive for prescription medications, industrial activated charcoal is heavily restricted due to its expensive cost. For the purpose of eliminating prescription drugs from water and wastewater, novel unconventional low-cost alternatives were looked into, and adsorbents based solely on clay, biochar, agricultural wastes, industrial wastes, and metal-natural frameworks were discussed in a number of research studies. This second study examines prominent articles that address the problem, covering the continuous fixed-bed process, regeneration capabilities, historical, economic, and practical aspects, as well as adsorption performance in terms of kinetics, equilibrium, and thermodynamics. Chemicals known as pharmaceuticals pollute the environment. This paper discusses the prevalence of pharmaceuticals in the environment, their main causes and effects, and proactive steps to remove them from the contaminated medium. This summary explains how the pollutant is mixed with the aquatic environment, along with its fundamental causes, insinuations, and effective methods for eliminating it. Compared to other therapies, adsorption offers advantages including less strength depletion and easier functioning conditions, making it a promising therapeutic approach.
{"title":"Removal of pharmaceuticals from wastewater: a review of different adsorptive approaches","authors":"","doi":"10.30955/gnj.005300","DOIUrl":"https://doi.org/10.30955/gnj.005300","url":null,"abstract":"Over the past few decades, pharmaceuticals have contaminated the marine ecosystem. The entry of prescription medications into the environment, their underlying causes and problems, and effective methods for treating such contaminated water are all evaluated in this study. Adsorption is becoming a more popular preferred treatment method because, compared to other post-secondary treatments, it has less strength requirements and is easier to use. Despite being extensively researched as a chemosorptive for prescription medications, industrial activated charcoal is heavily restricted due to its expensive cost. For the purpose of eliminating prescription drugs from water and wastewater, novel unconventional low-cost alternatives were looked into, and adsorbents based solely on clay, biochar, agricultural wastes, industrial wastes, and metal-natural frameworks were discussed in a number of research studies. This second study examines prominent articles that address the problem, covering the continuous fixed-bed process, regeneration capabilities, historical, economic, and practical aspects, as well as adsorption performance in terms of kinetics, equilibrium, and thermodynamics. Chemicals known as pharmaceuticals pollute the environment. This paper discusses the prevalence of pharmaceuticals in the environment, their main causes and effects, and proactive steps to remove them from the contaminated medium. This summary explains how the pollutant is mixed with the aquatic environment, along with its fundamental causes, insinuations, and effective methods for eliminating it. Compared to other therapies, adsorption offers advantages including less strength depletion and easier functioning conditions, making it a promising therapeutic approach. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"184 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484123","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}
As a widely used construction material, concrete is an ideal substrate for environmental functional materials. However, ordinary concrete lacks pollution resistance. When exposed to the natural environment, it is easily susceptible to microbial growth or organic contamination. Therefore, it is necessary to enhance its surface cleaning ability through modification methods. The existing anti-pollution materials are cumbersome to prepare and have a short lifespan. In this study, we employed in-situ synthesis to construct a TiO2/Ag coating on the surface of concrete. When illuminated, the catalyst coating generates electron-hole pairs, and with the synergistic acceleration of the heterojunction interface and oxygen defects, they separate and react with water to produce hydroxyl radicals and superoxide radicals. Under simulated sunlight with an intensity of 50mW/cm2, this material can achieve an 86.4% organic matter decomposition rate and a 96.7% microbial inactivation rate, and it can remain stable over ten cycles. This study presents a viable technical solution for the design of sustainable self-cleaning building materials.
{"title":"In-situ Construction of TiO2/Ag Heterojunction Coating for Forming a Photocatalytic Self-cleaning Surface of Concrete","authors":"","doi":"10.30955/gnj.005686","DOIUrl":"https://doi.org/10.30955/gnj.005686","url":null,"abstract":"As a widely used construction material, concrete is an ideal substrate for environmental functional materials. However, ordinary concrete lacks pollution resistance. When exposed to the natural environment, it is easily susceptible to microbial growth or organic contamination. Therefore, it is necessary to enhance its surface cleaning ability through modification methods. The existing anti-pollution materials are cumbersome to prepare and have a short lifespan. In this study, we employed in-situ synthesis to construct a TiO2/Ag coating on the surface of concrete. When illuminated, the catalyst coating generates electron-hole pairs, and with the synergistic acceleration of the heterojunction interface and oxygen defects, they separate and react with water to produce hydroxyl radicals and superoxide radicals. Under simulated sunlight with an intensity of 50mW/cm2, this material can achieve an 86.4% organic matter decomposition rate and a 96.7% microbial inactivation rate, and it can remain stable over ten cycles. This study presents a viable technical solution for the design of sustainable self-cleaning building materials. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"153 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140480737","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}
This study synthesizes selenium nanoparticles (Se NPs) using a green approach, utilizing Tectona grandis leaf extract in a hydrothermal method. The X-ray diffraction (XRD) analysis provided highly crystalline particles with a trigonal crystal structure, indicative of the well-defined nature of the synthesized Se NPs. Particle size analysis (PSA) results demonstrated a average particle size of 45 nm, further supporting the nano-sized characteristics of the particles. Field emission scanning electron microscopy (FESEM) results exhibited a hexagonal close-packed structure, providing valuable insights into the morphology of the Se NPs. Optical band gap calculations using the Tauc plot method yielded a value of 1.85 eV, highlighting the semiconductor nature of the synthesized Se NPs. The photocatalytic application of these nanoparticles was investigated against various cationic and anionic dyes, including Alizarin Red, Crystal Violet, Reactive Black, and Rhodamine B, under sunlight irradiation. Notably, the Se NPs demonstrated enhanced degradation, particularly for cationic dyes, attributed to electrostatic surface charge interactions. Rhodamine B exhibited the highest degradation efficiency among the dyes, reaching 96%. Furthermore, the stability of the Se NPs was evaluated through five consecutive cycles of photocatalytic degradation. Remarkably, the nanoparticles maintained stability, with only a marginal loss in degradation efficiency (after 5 cycles), affirming their potential as a stable and efficient nano photocatalyst for environmental remediation applications. This comprehensive investigation underscores the significance of green-synthesized Se NPs in advancing sustainable and effective photocatalytic processes.
{"title":"Evaluating the potential capability of Selenium nanoparticles on degradation of hazardess textile dye using environmental friendly approach","authors":"","doi":"10.30955/gnj.005633","DOIUrl":"https://doi.org/10.30955/gnj.005633","url":null,"abstract":"This study synthesizes selenium nanoparticles (Se NPs) using a green approach, utilizing Tectona grandis leaf extract in a hydrothermal method. The X-ray diffraction (XRD) analysis provided highly crystalline particles with a trigonal crystal structure, indicative of the well-defined nature of the synthesized Se NPs. Particle size analysis (PSA) results demonstrated a average particle size of 45 nm, further supporting the nano-sized characteristics of the particles. Field emission scanning electron microscopy (FESEM) results exhibited a hexagonal close-packed structure, providing valuable insights into the morphology of the Se NPs. Optical band gap calculations using the Tauc plot method yielded a value of 1.85 eV, highlighting the semiconductor nature of the synthesized Se NPs. The photocatalytic application of these nanoparticles was investigated against various cationic and anionic dyes, including Alizarin Red, Crystal Violet, Reactive Black, and Rhodamine B, under sunlight irradiation. Notably, the Se NPs demonstrated enhanced degradation, particularly for cationic dyes, attributed to electrostatic surface charge interactions. Rhodamine B exhibited the highest degradation efficiency among the dyes, reaching 96%. Furthermore, the stability of the Se NPs was evaluated through five consecutive cycles of photocatalytic degradation. Remarkably, the nanoparticles maintained stability, with only a marginal loss in degradation efficiency (after 5 cycles), affirming their potential as a stable and efficient nano photocatalyst for environmental remediation applications. This comprehensive investigation underscores the significance of green-synthesized Se NPs in advancing sustainable and effective photocatalytic processes. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"108 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140487581","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 active components of Jordanian Peganum harmala L. (P. harmala) were investigated using both GC-MS and DFT calculations. The study focused on the methanol extract of P. harmala leaves, which was found to contain 21 significant natural components, of which 9 compounds constituted more than 2% of the total composition. These 9 compounds, including α-D-Glucopyranose (GLUC), Phenobarbital (PHEN), Melibiose (MELI), Cyanuric acid (CYAN), D-Glucuronic acid (GLUCU), Ethylamine (ETHY), 3-Hydroxysebacic acid (HYSE), 3-Hydroxytetradecanedioic acid (HYTD), and α-Tocopherol (TOCO), were evaluated as eco-friendly corrosion inhibitors for Al (Aluminium), Fe (Iron), and Cu (Cooper) metals using DFT calculations. The results showed that TOCO had the highest anti-corrosion performance among the 9 compounds, with Fe exhibiting the most inhibitory activity compared to Al and Cu. The high electrophilicity and Gibbs free energy of adsorbate value on metal surfaces made TOCO a distinguished corrosion inhibitor. The HOMO and LUMO gap of the inhibitors decreased in the following order: ETHY > GLUC > MELI > HYTD > HYSE > CYAN > GLUCU > PHEN > TOCO. These findings suggest that these chemicals may serve as environmental-friendly anticorrosion inhibitors for metal surfaces, although more in vitro experiments are needed to confirm these results.
{"title":"Inhibition impact of major active ingredients of Jordanian Peganum harmala on the corrosion rate of Cu, Fe and Al metals","authors":"","doi":"10.30955/gnj.004606","DOIUrl":"https://doi.org/10.30955/gnj.004606","url":null,"abstract":"The active components of Jordanian Peganum harmala L. (P. harmala) were investigated using both GC-MS and DFT calculations. The study focused on the methanol extract of P. harmala leaves, which was found to contain 21 significant natural components, of which 9 compounds constituted more than 2% of the total composition. These 9 compounds, including α-D-Glucopyranose (GLUC), Phenobarbital (PHEN), Melibiose (MELI), Cyanuric acid (CYAN), D-Glucuronic acid (GLUCU), Ethylamine (ETHY), 3-Hydroxysebacic acid (HYSE), 3-Hydroxytetradecanedioic acid (HYTD), and α-Tocopherol (TOCO), were evaluated as eco-friendly corrosion inhibitors for Al (Aluminium), Fe (Iron), and Cu (Cooper) metals using DFT calculations. The results showed that TOCO had the highest anti-corrosion performance among the 9 compounds, with Fe exhibiting the most inhibitory activity compared to Al and Cu. The high electrophilicity and Gibbs free energy of adsorbate value on metal surfaces made TOCO a distinguished corrosion inhibitor. The HOMO and LUMO gap of the inhibitors decreased in the following order: ETHY > GLUC > MELI > HYTD > HYSE > CYAN > GLUCU > PHEN > TOCO. These findings suggest that these chemicals may serve as environmental-friendly anticorrosion inhibitors for metal surfaces, although more in vitro experiments are needed to confirm these results. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"55 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140486961","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}
This study delves into exploring and assessing ESG (Economic, Social, and Governance) performance in construction companies, utilizing China State Construction Group Corporation as a prominent example. The research aims to provide insights into sustainable practices within the construction industry. Employing a comprehensive framework, the study evaluates the economic, technological, environmental, social, and corporate governance aspects of ESG performance. The findings shed light on the specific influence of corporate governance and technology on the overall ESG performance. The China State Construction Group Corporation case study exemplifies notable advancements in these areas. The study concludes with valuable implications and recommendations for fostering enhanced ESG practices in the broader context of construction companies.
{"title":"Exploring and Assessing Construction Companies' ESG Performance in Sustainability","authors":"","doi":"10.30955/gnj.005698","DOIUrl":"https://doi.org/10.30955/gnj.005698","url":null,"abstract":"This study delves into exploring and assessing ESG (Economic, Social, and Governance) performance in construction companies, utilizing China State Construction Group Corporation as a prominent example. The research aims to provide insights into sustainable practices within the construction industry. Employing a comprehensive framework, the study evaluates the economic, technological, environmental, social, and corporate governance aspects of ESG performance. The findings shed light on the specific influence of corporate governance and technology on the overall ESG performance. The China State Construction Group Corporation case study exemplifies notable advancements in these areas. The study concludes with valuable implications and recommendations for fostering enhanced ESG practices in the broader context of construction companies. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140488988","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}
In order to explore the influence of digital economy development on carbon emission intensity from urban energy consumption, digital economy development is incorporated into the reduction framework of carbon emission intensity from urban energy consumption in this paper. With carbon emission intensity from urban energy consumption in China taken as the research object, empirical tests and dynamic effect analyses were carried out on the factors influencing carbon emission intensity from urban energy consumption, using urban panel data for the period of 2012–2022. It is found that digital economy has a significant inhibitory effect on carbon emission intensity from urban energy consumption in China, with a coefficient of -0.348. Among the five selected control variables, PCG, UR, and IS show a positive correlation with carbon emission intensity from urban energy consumption, enhancing EI with corresponding influence coefficients of 0.472, 0.135, and 0.331 respectively; EGRI and TRL show an inverse correlation with EI, inhibiting the growth of EI with corresponding influence coefficients of -0.556 and -0.201, respectively. Policy suggestions were put forward to minimize EI on the basis of the test results combined with the actual situation of China's urban economic development.
为探讨数字经济发展对城市能源消费碳排放强度的影响，本文将数字经济发展纳入城市能源消费碳排放强度的减排框架。以中国城市能源消费碳排放强度为研究对象，利用 2012-2022 年城市面板数据，对城市能源消费碳排放强度的影响因素进行了实证检验和动态效应分析。结果发现，数字经济对中国城市能源消费碳排放强度具有显著的抑制作用，系数为-0.348。在选取的五个控制变量中，PCG、UR和IS与城市能源消费碳排放强度呈正相关，分别以0.472、0.135和0.331的影响系数增强了EI；EGRI和TRL与EI呈反相关，分别以-0.556和-0.201的影响系数抑制了EI的增长。在检验结果的基础上，结合中国城市经济发展的实际情况，提出了最大限度降低 EI 的政策建议。
{"title":"Influence and its spatial verification of digital economy development on carbon emission intensity from urban energy consumption","authors":"","doi":"10.30955/gnj.005660","DOIUrl":"https://doi.org/10.30955/gnj.005660","url":null,"abstract":"In order to explore the influence of digital economy development on carbon emission intensity from urban energy consumption, digital economy development is incorporated into the reduction framework of carbon emission intensity from urban energy consumption in this paper. With carbon emission intensity from urban energy consumption in China taken as the research object, empirical tests and dynamic effect analyses were carried out on the factors influencing carbon emission intensity from urban energy consumption, using urban panel data for the period of 2012–2022. It is found that digital economy has a significant inhibitory effect on carbon emission intensity from urban energy consumption in China, with a coefficient of -0.348. Among the five selected control variables, PCG, UR, and IS show a positive correlation with carbon emission intensity from urban energy consumption, enhancing EI with corresponding influence coefficients of 0.472, 0.135, and 0.331 respectively; EGRI and TRL show an inverse correlation with EI, inhibiting the growth of EI with corresponding influence coefficients of -0.556 and -0.201, respectively. Policy suggestions were put forward to minimize EI on the basis of the test results combined with the actual situation of China's urban economic development. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"37 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140488607","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}
Increased water conductivity levels have been proposed as a key factor to explain the occurrence of teratological forms in freshwater diatom assemblages. The current study aimed to carry out an experiment on a laboratory scale to assess the response of periphytic diatoms to artificially increased salinity levels. The obtained results show that: a) the proportion of aberrant cells increased in high conductivity treatments, b) developed teratologies were preserved in diatom populations even after being translocated to normal conditions, and c) the degree of valve outline deformation in the dominant species was proportional to the induced water conductivity. All these data support previous field observations that linked high electrolyte content and the abundance of aberrant cells among microalgal communities in continental aquatic ecosystems.
{"title":"Exploring the Effect of Salinity as a Primary Cause of Teratology in Freshwater Diatoms","authors":"","doi":"10.30955/gnj.005586","DOIUrl":"https://doi.org/10.30955/gnj.005586","url":null,"abstract":"Increased water conductivity levels have been proposed as a key factor to explain the occurrence of teratological forms in freshwater diatom assemblages. The current study aimed to carry out an experiment on a laboratory scale to assess the response of periphytic diatoms to artificially increased salinity levels. The obtained results show that: a) the proportion of aberrant cells increased in high conductivity treatments, b) developed teratologies were preserved in diatom populations even after being translocated to normal conditions, and c) the degree of valve outline deformation in the dominant species was proportional to the induced water conductivity. All these data support previous field observations that linked high electrolyte content and the abundance of aberrant cells among microalgal communities in continental aquatic ecosystems. \u0000","PeriodicalId":502310,"journal":{"name":"Global NEST: the international Journal","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140490847","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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