Andrea Salvai, J. Grabić, Jasmina Josimov-Dundjerski, Radoš Zemunac, Nenad Antonic, R. Savić, B. Blagojević
Abstract The Danube River plays significant role not only for preserving natural ecosystems. The aim of this paper is to examine the Middle Danube water quality in the part flowing through Serbia in section Bezdan -Banatska Palanka. Water quality data were examined for seven control points for period 2004-2018, for seven parameters: suspended solids (SS), dissolved oxygen (DO), electrical conductivity (EC), nitrates (NO3–-N), total phosphorus (Ptot), biochemical oxygen demand (BOD5) and chemical oxygen demand (COD). Data analyses included the application of ANOVA, linear regression analysis and Mann-Kendall trend test. The Mann-Kendall tests in most (32/49) cases, i.e. in 65 %, confirmed the non-existence of a significant trend. Significant downward trends were confirmed in 17 cases. Water quality improvement was confirmed at following control points: Bezdan for NO3–-N, Ptot and BOD5; Bogojevo for NO3–-N, Ptot, COD and BOD5; Novi Sad for Ptot, BOD5 and COD; Slankamen for BOD5 and COD; Smederevo for NO3–-N and COD; Banatska Palanka for NO3–-N. Slight deterioration of water quality was confirmed only in two cases, at the Zemun and Smederevo where DO was decreasing. Water quality for the examined period was stable and can be characterised as excellent and/or very good (class I or class II). Results emphasise fact that water quality trends monitoring reveals river sectors where the process of water quality degradation is ongoing. Timely detected critical river sectors can draw the attention of decision-makers, who can improve the existing legislation that would lead to water quality improvement.
{"title":"Trend Analysis of Water Quality Parameters in the Middle Part of the Danube Flow in Serbia","authors":"Andrea Salvai, J. Grabić, Jasmina Josimov-Dundjerski, Radoš Zemunac, Nenad Antonic, R. Savić, B. Blagojević","doi":"10.2478/eces-2022-0006","DOIUrl":"https://doi.org/10.2478/eces-2022-0006","url":null,"abstract":"Abstract The Danube River plays significant role not only for preserving natural ecosystems. The aim of this paper is to examine the Middle Danube water quality in the part flowing through Serbia in section Bezdan -Banatska Palanka. Water quality data were examined for seven control points for period 2004-2018, for seven parameters: suspended solids (SS), dissolved oxygen (DO), electrical conductivity (EC), nitrates (NO3–-N), total phosphorus (Ptot), biochemical oxygen demand (BOD5) and chemical oxygen demand (COD). Data analyses included the application of ANOVA, linear regression analysis and Mann-Kendall trend test. The Mann-Kendall tests in most (32/49) cases, i.e. in 65 %, confirmed the non-existence of a significant trend. Significant downward trends were confirmed in 17 cases. Water quality improvement was confirmed at following control points: Bezdan for NO3–-N, Ptot and BOD5; Bogojevo for NO3–-N, Ptot, COD and BOD5; Novi Sad for Ptot, BOD5 and COD; Slankamen for BOD5 and COD; Smederevo for NO3–-N and COD; Banatska Palanka for NO3–-N. Slight deterioration of water quality was confirmed only in two cases, at the Zemun and Smederevo where DO was decreasing. Water quality for the examined period was stable and can be characterised as excellent and/or very good (class I or class II). Results emphasise fact that water quality trends monitoring reveals river sectors where the process of water quality degradation is ongoing. Timely detected critical river sectors can draw the attention of decision-makers, who can improve the existing legislation that would lead to water quality improvement.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"23 1","pages":"51 - 63"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72615310","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}
Similade A. Adeodun, A. Sangodoyin, M. B. Ogundiran
Abstract Wood wastes are one of the leading contributors of greenhouse gases cum climate change. While the burning of wood wastes results in CO2 emission, decomposition generates methane. In place of these emissions, wood wastes can be converted into biochars which have a lot of novel applications. However, low biochar yield was the common limitation of wood wastes, essentially, due to a mixture of different classifications of trees that pyrolyse at different conditions. In this study, biochar yield from sorted wood wastes was optimised by varying pyrolysis temperature and time. Power consumption, cost, and carbon footprint of the optimised biochar and ash were compared for both hydropower grid and diesel generator scenarios. Optimal pyrolysis yields were 33.6 % (400 °C), 29.4 % (350 °C) and 18.5 % (400 °C) respectively for hardwood sawdust char (HSC), softwood sawdust char (SSC), and mixed sawdust char (MSC) at 2 hours duration for all materials. The CO2 emissions from ash were 2.49 kg and 19.0 kg respectively for grid and diesel power supply. The diesel generator power was 17 times more expensive than grid power for wood wastes pyrolysis. Wood wastes have better biochar yield when charred homogenously; they have a smaller carbon footprint and are cheaper when produced with power from the grid. Wood wastes in place of being burnt can be processed as inexpensive and environment-friendly biochar.
{"title":"Optimisation of Biochar Yield from Sorted Wood Wastes as Sustainable Alternatives to Burning to Ash","authors":"Similade A. Adeodun, A. Sangodoyin, M. B. Ogundiran","doi":"10.2478/eces-2022-0003","DOIUrl":"https://doi.org/10.2478/eces-2022-0003","url":null,"abstract":"Abstract Wood wastes are one of the leading contributors of greenhouse gases cum climate change. While the burning of wood wastes results in CO2 emission, decomposition generates methane. In place of these emissions, wood wastes can be converted into biochars which have a lot of novel applications. However, low biochar yield was the common limitation of wood wastes, essentially, due to a mixture of different classifications of trees that pyrolyse at different conditions. In this study, biochar yield from sorted wood wastes was optimised by varying pyrolysis temperature and time. Power consumption, cost, and carbon footprint of the optimised biochar and ash were compared for both hydropower grid and diesel generator scenarios. Optimal pyrolysis yields were 33.6 % (400 °C), 29.4 % (350 °C) and 18.5 % (400 °C) respectively for hardwood sawdust char (HSC), softwood sawdust char (SSC), and mixed sawdust char (MSC) at 2 hours duration for all materials. The CO2 emissions from ash were 2.49 kg and 19.0 kg respectively for grid and diesel power supply. The diesel generator power was 17 times more expensive than grid power for wood wastes pyrolysis. Wood wastes have better biochar yield when charred homogenously; they have a smaller carbon footprint and are cheaper when produced with power from the grid. Wood wastes in place of being burnt can be processed as inexpensive and environment-friendly biochar.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"42 1","pages":"15 - 26"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76696307","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}
Qiaoling Xu, Li Wang, Ping Wang, Xue Wen, Feng Zhang
Abstract With the continuous operation of constructed wetlands, substrate clogging is issue. In order to solve the problem, there is practical significance to understand the causes for clogging in constructed wetlands. Two pilot-scale vertical flow constructed wetlands were established, namely, CW-B and CW-C. By studying the relationship between the accumulation of different substances and the banked-up water area, it was found that the accumulation of non-filter substances and total solids was an important reason for the clogging of the substrate, and the accumulation degree of non-filter inorganic substances was more obvious than that of non-filter organic substances, and the blockage was mainly located in the 10-20 cm layer. In the vertical flow constructed wetland with river sand as the main substrate, water accumulation will occur when the content of total solid and non-filter substances exceeds 67.233 g and 101.228 g per cubic meter of substrate, respectively. Therefore, it is important to pay attention to the substrate particle size matching of 0-20 cm layer to reduce the clogging in the vertical flow constructed wetland. The clogging has little effect on chemical oxygen demand (COD) removal, but great effect on total phosphorus (TP) removal. Compared with the control wetland (CW-C), the biomass content in the CW-B with biochar increased by 334.26 nmol P/g, which can improve the removal efficiency of total nitrogen (TN) and total phosphorus (TP), but also increase the risk of clogging in the vertical flow constructed wetland. Future research should try to combine the anti-blocking research results of biochar constructed wetlands to improve the purification effect, which is of great significance to promote the sustainable development of constructed wetlands.
随着人工湿地的持续运行，基材堵塞问题日益突出。为了解决这一问题，了解人工湿地堵塞的原因具有重要的现实意义。建立了两个中试垂直流人工湿地，分别是CW-B和CW-C。通过研究不同物质的堆积与淤积水域面积的关系，发现非过滤性物质和总固体的堆积是造成基质堵塞的重要原因，非过滤性无机物的堆积程度比非过滤性有机物更明显，堵塞主要位于10-20 cm层。在以河砂为主要基质的垂直流人工湿地中，当总固体物质和非过滤物质含量分别超过67.233 g / m3和101.228 g / m3基质时，就会发生积水。因此，要减少垂直流人工湿地的堵塞，必须注意0-20 cm层基质粒度匹配。堵塞对化学需氧量(COD)的去除影响不大，但对总磷(TP)的去除影响较大。与对照湿地(CW-C)相比，添加生物炭的CW-B中生物量含量提高了334.26 nmol P/g，可以提高总氮(TN)和总磷(TP)的去除效率，但也增加了垂直流人工湿地堵塞的风险。未来的研究应尽量结合生物炭人工湿地的抗堵塞研究成果，提高净化效果，这对促进人工湿地的可持续发展具有重要意义。
{"title":"Clogging in Vertical Flow Constructed Wetlands: Causes for Clogging and Influence of Decontamination","authors":"Qiaoling Xu, Li Wang, Ping Wang, Xue Wen, Feng Zhang","doi":"10.2478/eces-2022-0007","DOIUrl":"https://doi.org/10.2478/eces-2022-0007","url":null,"abstract":"Abstract With the continuous operation of constructed wetlands, substrate clogging is issue. In order to solve the problem, there is practical significance to understand the causes for clogging in constructed wetlands. Two pilot-scale vertical flow constructed wetlands were established, namely, CW-B and CW-C. By studying the relationship between the accumulation of different substances and the banked-up water area, it was found that the accumulation of non-filter substances and total solids was an important reason for the clogging of the substrate, and the accumulation degree of non-filter inorganic substances was more obvious than that of non-filter organic substances, and the blockage was mainly located in the 10-20 cm layer. In the vertical flow constructed wetland with river sand as the main substrate, water accumulation will occur when the content of total solid and non-filter substances exceeds 67.233 g and 101.228 g per cubic meter of substrate, respectively. Therefore, it is important to pay attention to the substrate particle size matching of 0-20 cm layer to reduce the clogging in the vertical flow constructed wetland. The clogging has little effect on chemical oxygen demand (COD) removal, but great effect on total phosphorus (TP) removal. Compared with the control wetland (CW-C), the biomass content in the CW-B with biochar increased by 334.26 nmol P/g, which can improve the removal efficiency of total nitrogen (TN) and total phosphorus (TP), but also increase the risk of clogging in the vertical flow constructed wetland. Future research should try to combine the anti-blocking research results of biochar constructed wetlands to improve the purification effect, which is of great significance to promote the sustainable development of constructed wetlands.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"64 1","pages":"65 - 75"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85339652","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}
Abstract With the development of economy, people have higher and higher requirements for living art. A good ecological environment is the guarantee of creating an aesthetic environment. Taking the ecological environment construction of ecological town as an example, this paper analyses the importance of integrating artistic elements into the ecological environment construction in the new era from the perspective of environmental aesthetics. Based on the concept of "three life integration" and "garden city theory", this paper creatively puts forward the construction methods and models of ecological environment in contemporary small towns. Based on the height of environmental aesthetics, this paper analyses the planning and construction process of characteristic town and the evaluation and acceptance criteria of ecological environment design, summarises its successful experience and main problems, and makes a retrospective summary and reflection. This paper analyses the importance of the integration of art elements into the ecological town in the new era. The results show that in the new era of ecological environment construction, the integration of art elements can not only improve the quality of ecological environment construction, but also improve the common people's cognition of ecological beauty.
{"title":"Analysis of the importance of art elements in the construction of ecological environment in the new era","authors":"F. Liu","doi":"10.2478/eces-2021-0039","DOIUrl":"https://doi.org/10.2478/eces-2021-0039","url":null,"abstract":"Abstract With the development of economy, people have higher and higher requirements for living art. A good ecological environment is the guarantee of creating an aesthetic environment. Taking the ecological environment construction of ecological town as an example, this paper analyses the importance of integrating artistic elements into the ecological environment construction in the new era from the perspective of environmental aesthetics. Based on the concept of \"three life integration\" and \"garden city theory\", this paper creatively puts forward the construction methods and models of ecological environment in contemporary small towns. Based on the height of environmental aesthetics, this paper analyses the planning and construction process of characteristic town and the evaluation and acceptance criteria of ecological environment design, summarises its successful experience and main problems, and makes a retrospective summary and reflection. This paper analyses the importance of the integration of art elements into the ecological town in the new era. The results show that in the new era of ecological environment construction, the integration of art elements can not only improve the quality of ecological environment construction, but also improve the common people's cognition of ecological beauty.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"1 1","pages":"597 - 611"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72955302","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}
Chia-Huei Wu, S. Tsai, Wei Liu, Xuefeng Shao, Yang-Kun Xia, M. Wacławek
Abstract The discharge of wastewater containing both high salinity and high organic content without prior treatment is detrimental to aquatic life and water hygiene. In order to integrate the advantages of membrane treatment and biological treatment, and exert the phosphorus removal efficiency of dewatered alum sludge, in this study, an aerobic membrane reactor based on dehydrated alum sludge was used to treat mustard tuber wastewater with salinity of 6.8-7.3 % under the conditions of 30 °C, 20 kPa trans-membrane pressure (TMP) and chemical oxygen demand (COD) of 3300-3900 mg/L. Three replicate reactors were applied to assess the operational performance under different organic loading rate (OLR). The results showed that all reactors were effective in removing COD, ammonia nitrogen (NH4+-N) and soluble phosphate (SP) under the conditions of 30 °C and 20 kPa of TMP. Meanwhile, the effluent concentration of COD, NH4+-N and SP all increased while OLR was changed from 1.0 to 3.0 kg COD/m3/day, and the effluent COD and NH4+-N concentration except for SP could reach the B-level of Chinese “Wastewater quality standards for discharge to municipal sewers” when OLR was less than 3.0 kg COD/m3/day. This indicates that dewatered alum sludge-based aerobic membrane reactor is a promising bio-measure for treating high salinity wastewater.
{"title":"Green environment and sustainable development: methods and applications","authors":"Chia-Huei Wu, S. Tsai, Wei Liu, Xuefeng Shao, Yang-Kun Xia, M. Wacławek","doi":"10.2478/eces-2021-0030","DOIUrl":"https://doi.org/10.2478/eces-2021-0030","url":null,"abstract":"Abstract The discharge of wastewater containing both high salinity and high organic content without prior treatment is detrimental to aquatic life and water hygiene. In order to integrate the advantages of membrane treatment and biological treatment, and exert the phosphorus removal efficiency of dewatered alum sludge, in this study, an aerobic membrane reactor based on dehydrated alum sludge was used to treat mustard tuber wastewater with salinity of 6.8-7.3 % under the conditions of 30 °C, 20 kPa trans-membrane pressure (TMP) and chemical oxygen demand (COD) of 3300-3900 mg/L. Three replicate reactors were applied to assess the operational performance under different organic loading rate (OLR). The results showed that all reactors were effective in removing COD, ammonia nitrogen (NH4+-N) and soluble phosphate (SP) under the conditions of 30 °C and 20 kPa of TMP. Meanwhile, the effluent concentration of COD, NH4+-N and SP all increased while OLR was changed from 1.0 to 3.0 kg COD/m3/day, and the effluent COD and NH4+-N concentration except for SP could reach the B-level of Chinese “Wastewater quality standards for discharge to municipal sewers” when OLR was less than 3.0 kg COD/m3/day. This indicates that dewatered alum sludge-based aerobic membrane reactor is a promising bio-measure for treating high salinity wastewater.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"58 1","pages":"467 - 470"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77891657","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}
Abstract With the development of information technology, the improvement of production processes and lifestyles, and the transformation of commercial economic models, the traditional agricultural industry cannot meet the increasing material and cultural needs of villagers. Therefore, the development of traditional tourist villages has transformed into being based on ecological engineering and sustainable development. The starting point of the existence of such tourist villages will be the protection and development of traditional villages. At the same time, the village space is the material carrier for the development of rural tourism, and the construction of a spatial form that is compatible with the tourism resource utilization model can effectively promote the development of rural tourism. Based on SWOT analysis, this article carefully analyses and summarises the domestic research on the sustainable development of tourist villages. The results show that such sustainable development effectively avoids the excessive development of resource elements during rural construction, which can lead to waste, and promotes the optimal use of resources. Since rural tourism has taken a sustainable development path, the average annual compound growth rate has reached as high as 31.2 %, which is considered very rapid growth. Tourist operating income has reached more than 30 %. It is expected that the national rural tourism income in 2021 will exceed 10,000 trillion yuan. Tourism villages will continue to consider ecological engineering and sustainable development as the starting point for promoting the development of rural tourism in China, popularising consumption, standardising services, diversifying benefits, and making products unique.
{"title":"The cognition of the spatial art forms of tourist villages based on ecological engineering and sustainable development","authors":"Dingran Wang, Dazhuang Li","doi":"10.2478/eces-2021-0038","DOIUrl":"https://doi.org/10.2478/eces-2021-0038","url":null,"abstract":"Abstract With the development of information technology, the improvement of production processes and lifestyles, and the transformation of commercial economic models, the traditional agricultural industry cannot meet the increasing material and cultural needs of villagers. Therefore, the development of traditional tourist villages has transformed into being based on ecological engineering and sustainable development. The starting point of the existence of such tourist villages will be the protection and development of traditional villages. At the same time, the village space is the material carrier for the development of rural tourism, and the construction of a spatial form that is compatible with the tourism resource utilization model can effectively promote the development of rural tourism. Based on SWOT analysis, this article carefully analyses and summarises the domestic research on the sustainable development of tourist villages. The results show that such sustainable development effectively avoids the excessive development of resource elements during rural construction, which can lead to waste, and promotes the optimal use of resources. Since rural tourism has taken a sustainable development path, the average annual compound growth rate has reached as high as 31.2 %, which is considered very rapid growth. Tourist operating income has reached more than 30 %. It is expected that the national rural tourism income in 2021 will exceed 10,000 trillion yuan. Tourism villages will continue to consider ecological engineering and sustainable development as the starting point for promoting the development of rural tourism in China, popularising consumption, standardising services, diversifying benefits, and making products unique.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"69 1","pages":"581 - 595"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87574414","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}
Abstract This paper provides an in-depth analysis and research on low carbon financial support strategies from the perspective of ecological environmental protection. The understanding and analysis of the development status of ecological environmental protection inspectors, the analysis of the current rule of law construction, organizational structure, operation mechanism and capacity of the current ecological environmental protection inspectors, the understanding of the defects and problems in the work of the inspectors, to provide a basis for improving the inspection function. Through financial instruments It is of great theoretical value and practical significance to realise the full utilization of resources, the optimization of industrial structure and the low-carbon cycle development of agricultural economy. Combining the current situation and constraints of financial support for low-carbon agriculture, we propose targeted financial policy recommendations such as credit innovation for agricultural green projects rich in characteristics and conducive to the development of low-carbon agriculture, broadening private financing channels for low-carbon agriculture, and exploring low-carbon agricultural insurance. The entropy value method is used to determine the index weights, and the comprehensive evaluation method is used to calculate the comprehensive development evaluation value of the two subsystems; finally, the coupling coordination degree model is used to analyse the coupling degree and coupling coordination degree of the carbon finance and low-carbon agriculture composite systems, and the factors affecting the coupling coordination degree are analysed on this basis. Although the coupling level between them is at a low level of coupling, it is in transition to a medium coupling; the coupling coordination degree is at a mild disorder, and gradually in transition to a near disorder.
{"title":"Research on low carbon financial support strategies from the perspective of eco-environmental protection","authors":"Lihong Jiang","doi":"10.2478/eces-2021-0035","DOIUrl":"https://doi.org/10.2478/eces-2021-0035","url":null,"abstract":"Abstract This paper provides an in-depth analysis and research on low carbon financial support strategies from the perspective of ecological environmental protection. The understanding and analysis of the development status of ecological environmental protection inspectors, the analysis of the current rule of law construction, organizational structure, operation mechanism and capacity of the current ecological environmental protection inspectors, the understanding of the defects and problems in the work of the inspectors, to provide a basis for improving the inspection function. Through financial instruments It is of great theoretical value and practical significance to realise the full utilization of resources, the optimization of industrial structure and the low-carbon cycle development of agricultural economy. Combining the current situation and constraints of financial support for low-carbon agriculture, we propose targeted financial policy recommendations such as credit innovation for agricultural green projects rich in characteristics and conducive to the development of low-carbon agriculture, broadening private financing channels for low-carbon agriculture, and exploring low-carbon agricultural insurance. The entropy value method is used to determine the index weights, and the comprehensive evaluation method is used to calculate the comprehensive development evaluation value of the two subsystems; finally, the coupling coordination degree model is used to analyse the coupling degree and coupling coordination degree of the carbon finance and low-carbon agriculture composite systems, and the factors affecting the coupling coordination degree are analysed on this basis. Although the coupling level between them is at a low level of coupling, it is in transition to a medium coupling; the coupling coordination degree is at a mild disorder, and gradually in transition to a near disorder.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"106 1","pages":"525 - 539"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79286068","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}
Abstract This study used 2017-2019 Chinese A-share-listed automobile manufacturing companies as research samples to analyse the impact of the government-business relationship on eco-innovation. We found that a healthy government-business relationship had a positive impact on enterprise eco-innovation. The mediating effects test verified that a healthy government-business relationship affected enterprise eco-innovation through financing constraints. In addition, managerial ownership significantly increased the positive impact of a healthy government-business relationship on enterprise eco-innovation. We also found that a healthy government-business relationship had a more substantial impact on enterprise eco-innovation in non-state-owned enterprises when considering corporate property rights. The study results provide empirical evidence for the influence of the government-business relationship on enterprise eco-innovation and deepen our understanding of eco-innovation in China’s automobile manufacturing industry.
{"title":"The government-business relationship and eco-innovation: evidence from chinese automobile industry","authors":"Yu Gao, Zhuoqi Teng, Yan-Song Cai, Xiaotian Dong","doi":"10.2478/eces-2021-0036","DOIUrl":"https://doi.org/10.2478/eces-2021-0036","url":null,"abstract":"Abstract This study used 2017-2019 Chinese A-share-listed automobile manufacturing companies as research samples to analyse the impact of the government-business relationship on eco-innovation. We found that a healthy government-business relationship had a positive impact on enterprise eco-innovation. The mediating effects test verified that a healthy government-business relationship affected enterprise eco-innovation through financing constraints. In addition, managerial ownership significantly increased the positive impact of a healthy government-business relationship on enterprise eco-innovation. We also found that a healthy government-business relationship had a more substantial impact on enterprise eco-innovation in non-state-owned enterprises when considering corporate property rights. The study results provide empirical evidence for the influence of the government-business relationship on enterprise eco-innovation and deepen our understanding of eco-innovation in China’s automobile manufacturing industry.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"12 1","pages":"541 - 561"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81900166","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}
Abstract The resources of a country are limited, and people must consider the important issue of how to make use of these limited material resources to create major economic value for humans. The theory of the circular economy has been proposed, which relies on scientific model research to create economic development that is more in line with people’s concept of environmental management. The circular economy is characterised by resource conservation, recycling, coordination, low development, high utilization and low emissions. All material and energy use is reasonable, and sustainable land use minimises the influence of economic activities on the natural environment. Based on the theory of the circular economy, this paper studies the model of environmental management science. This paper analyses the mining development mode, the mechanism of the circular economy, and green logistics research based on circular economy theory and then applies statistical analyses to the two models. It summarises the development mode and the mechanism of the mining circular economy based on the current mineral resource development and utilization situation and the environmental problems in China. An innovative mode mechanism for mining circular economy development is proposed that can provide a value evaluation standard for social development. Through the above research, it is found that the use of circular economy theory can not only help make effective use of resources but also provide a new way to improve the gross national product.
{"title":"Model of environmental management science based on circular economy theory","authors":"Yin Cheng, Jichao Xu","doi":"10.2478/eces-2021-0034","DOIUrl":"https://doi.org/10.2478/eces-2021-0034","url":null,"abstract":"Abstract The resources of a country are limited, and people must consider the important issue of how to make use of these limited material resources to create major economic value for humans. The theory of the circular economy has been proposed, which relies on scientific model research to create economic development that is more in line with people’s concept of environmental management. The circular economy is characterised by resource conservation, recycling, coordination, low development, high utilization and low emissions. All material and energy use is reasonable, and sustainable land use minimises the influence of economic activities on the natural environment. Based on the theory of the circular economy, this paper studies the model of environmental management science. This paper analyses the mining development mode, the mechanism of the circular economy, and green logistics research based on circular economy theory and then applies statistical analyses to the two models. It summarises the development mode and the mechanism of the mining circular economy based on the current mineral resource development and utilization situation and the environmental problems in China. An innovative mode mechanism for mining circular economy development is proposed that can provide a value evaluation standard for social development. Through the above research, it is found that the use of circular economy theory can not only help make effective use of resources but also provide a new way to improve the gross national product.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"34 1","pages":"513 - 524"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87231887","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}
Lingzhi Li, P. Lu, Hai Chi, Hongliang Huang, Youqiong Cai
Abstract Antarctic krill mainly inhabit the Antarctic Ocean, not far from Antarctica, especially the Weddell Sea, where krill is dense. Marine fisheries have reached new levels, but the topic of sustainable use of marine fishery resources is far from reaching the required levels. In order to study the sustainable development of the Antarctic krill environment, this paper studies the living environment and applicability of Antarctic krill based on system dynamics, and provides some references for the sustainable development of marine resources. Mentioned the use of case analysis method, literature analysis method and other methods to collect data, build a Model, and read and analyse a large number of related literatures through the literature survey method. The experimental results proved that the salinity has a significant effect on the survival rate of Antarctic krill (p < 0.05). When the salinity is 34, the molting frequency reaches its maximum value, which is 70 %. It is concluded that the ability of Antarctic krill to adapt to gradual changes in salinity is stronger than that of sudden changes in salinity, and the suitable salinity for survival is 30-42. With 34 as the basic salinity, when the salinity rises within a certain range, the molting rate of krill will increase, and as the salinity decreases, the molting rate will gradually decrease. This shows that improving the environmental resources of Antarctic krill is an effective method for improving salinity.
{"title":"Sustainable development of antarctic krill environmental resources based on system dynamics","authors":"Lingzhi Li, P. Lu, Hai Chi, Hongliang Huang, Youqiong Cai","doi":"10.2478/eces-2021-0031","DOIUrl":"https://doi.org/10.2478/eces-2021-0031","url":null,"abstract":"Abstract Antarctic krill mainly inhabit the Antarctic Ocean, not far from Antarctica, especially the Weddell Sea, where krill is dense. Marine fisheries have reached new levels, but the topic of sustainable use of marine fishery resources is far from reaching the required levels. In order to study the sustainable development of the Antarctic krill environment, this paper studies the living environment and applicability of Antarctic krill based on system dynamics, and provides some references for the sustainable development of marine resources. Mentioned the use of case analysis method, literature analysis method and other methods to collect data, build a Model, and read and analyse a large number of related literatures through the literature survey method. The experimental results proved that the salinity has a significant effect on the survival rate of Antarctic krill (p < 0.05). When the salinity is 34, the molting frequency reaches its maximum value, which is 70 %. It is concluded that the ability of Antarctic krill to adapt to gradual changes in salinity is stronger than that of sudden changes in salinity, and the suitable salinity for survival is 30-42. With 34 as the basic salinity, when the salinity rises within a certain range, the molting rate of krill will increase, and as the salinity decreases, the molting rate will gradually decrease. This shows that improving the environmental resources of Antarctic krill is an effective method for improving salinity.","PeriodicalId":11395,"journal":{"name":"Ecological Chemistry and Engineering S","volume":"25 1","pages":"471 - 485"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81537886","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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