Haonan Sun, Tao Lei, Xianghong Guo, Jianxin Liu, Xihuan Sun, Juanjuan Ma
The self-made slow-release membrane material with water-based copolymer (polyvinyl alcohol PVA, polyvinyl pyrrolidone PVP), zeolite and epoxy resin as raw materials was tested for degradation in buried soil. The effects of soil temperature T ( T 15 , T 25 , T 35 ) and moisture W ( W 60 , W 80 , W 100 ) on the degradability of membrane materials were investigated by a comprehensive experimental design, and a hydrothermal coupling model K ( T , W ) was established. The effects of degradation on the chemical structure, functional groups, and morphology of membrane materials were revealed by infrared spectroscopy and SEM electron microscopy. The results showed that the degradation degree of membrane material was an exponentially positive response to the increase in soil temperature and moisture. The degradation rate of membrane materials under different treatments was 13.7%-17.3%, and the maximum degradation rate was 17.3% under the T 35 W 100 condition. The determination coefficient R 2 of the constructed K ( T , W ) model reached 0.927, and the average relative error of the predicted degradation rate was 1.58%, indicating good accuracy of the model. The infrared spectrum showed that the -OH stretching vibration absorption peak of the degraded membrane becomes wider and the peak intensity increases; the absorption peak intensity of C-H, -CH 2 , and Si-O weakens; and the peak of the C=C absorption peak appears as a continuous staircase after degradation. The SEM electron microscopy showed there were differences in the pores and cracks of the membrane materials under different treatments, and the degradation was the most obvious under the T 35 W 100 condition.
以水性共聚物（聚乙烯醇PVA、聚乙烯吡咯烷酮PVP）、沸石和环氧树脂为原料，对自制的缓释膜材料进行了埋土降解试验。通过综合实验设计研究了土壤温度 T（T 15、T 25、T 35）和湿度 W（W 60、W 80、W 100）对膜材料降解性的影响，并建立了水热耦合模型 K（T，W）。通过红外光谱和 SEM 电子显微镜揭示了降解对膜材料化学结构、官能团和形貌的影响。结果表明，膜材料的降解程度与土壤温度和湿度的增加呈指数正相关。不同处理条件下膜材料的降解率为 13.7%-17.3%，在 T 35 W 100 条件下降解率最大，为 17.3%。构建的 K ( T , W ) 模型的判定系数 R 2 达到 0.927，预测降解率的平均相对误差为 1.58%，表明模型的准确性较好。红外光谱显示，降解膜的-OH伸缩振动吸收峰变宽，峰强度增大；C-H、-CH 2和Si-O的吸收峰强度减弱；降解后C=C吸收峰呈连续阶梯状。SEM 电子显微镜显示，在不同处理条件下，膜材料的孔隙和裂纹存在差异，在 T 35 W 100 条件下降解最为明显。
{"title":"Degradation Properties of Sustained Release\u0000Membrane Composited of Water-Based\u0000Copolymer and Zeolite","authors":"Haonan Sun, Tao Lei, Xianghong Guo, Jianxin Liu, Xihuan Sun, Juanjuan Ma","doi":"10.15244/pjoes/177463","DOIUrl":"https://doi.org/10.15244/pjoes/177463","url":null,"abstract":"The self-made slow-release membrane material with water-based copolymer (polyvinyl alcohol PVA, polyvinyl pyrrolidone PVP), zeolite and epoxy resin as raw materials was tested for degradation in buried soil. The effects of soil temperature T ( T 15 , T 25 , T 35 ) and moisture W ( W 60 , W 80 , W 100 ) on the degradability of membrane materials were investigated by a comprehensive experimental design, and a hydrothermal coupling model K ( T , W ) was established. The effects of degradation on the chemical structure, functional groups, and morphology of membrane materials were revealed by infrared spectroscopy and SEM electron microscopy. The results showed that the degradation degree of membrane material was an exponentially positive response to the increase in soil temperature and moisture. The degradation rate of membrane materials under different treatments was 13.7%-17.3%, and the maximum degradation rate was 17.3% under the T 35 W 100 condition. The determination coefficient R 2 of the constructed K ( T , W ) model reached 0.927, and the average relative error of the predicted degradation rate was 1.58%, indicating good accuracy of the model. The infrared spectrum showed that the -OH stretching vibration absorption peak of the degraded membrane becomes wider and the peak intensity increases; the absorption peak intensity of C-H, -CH 2 , and Si-O weakens; and the peak of the C=C absorption peak appears as a continuous staircase after degradation. The SEM electron microscopy showed there were differences in the pores and cracks of the membrane materials under different treatments, and the degradation was the most obvious under the T 35 W 100 condition.","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":"56 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140662509","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}
Youli Qiu, Chao Yang, Min Wu, Jie Li, Ruimin He, Chunming Hao, Xing Fan
In this study, emulsion and mine water samples were collected from the Daliuta area, and the emulsion composition was analyzed. The typical pollutants in the emulsion were triethanolamine, sodium benzoate, sodium nitrite, and sodium hyponitrotriacetate. Furthermore, migration and transformation studies were conducted with respect to these typical pollutants in the emulsion. When the mine water was passed through the aeration zone of a water accumulation leaching device, the pollutant concentrations considerably decreased, resulting in significant adsorption and migration effects. Subsequently, the adsorption effect was significantly reduced. The adsorption rate of sodium benzoate and sodium hyponitrotriacetate increased with an increase in the emulsion concentration on the 30th day. The adsorption rate of sodium nitrite in 1 L mine water with 20 mL emulsion on the 30 th day was 86.4%. The noncarcinogenic health risk assessment and exposure index (EI) model calculations of the simulated mine water containing emulsion revealed that all the hazard quotient (HQ) and EI values of carcinogens were >1. Furthermore, reference pollutant concentrations under the specific conditions of HQ and EI were obtained. These study findings are expected to provide scientific data support for local governments to strengthen geological environment management in mining areas.
{"title":"Analysis of Emulsion Composition\u0000and the Migration and Transformation\u0000in Mine Water","authors":"Youli Qiu, Chao Yang, Min Wu, Jie Li, Ruimin He, Chunming Hao, Xing Fan","doi":"10.15244/pjoes/177151","DOIUrl":"https://doi.org/10.15244/pjoes/177151","url":null,"abstract":"In this study, emulsion and mine water samples were collected from the Daliuta area, and the emulsion composition was analyzed. The typical pollutants in the emulsion were triethanolamine, sodium benzoate, sodium nitrite, and sodium hyponitrotriacetate. Furthermore, migration and transformation studies were conducted with respect to these typical pollutants in the emulsion. When the mine water was passed through the aeration zone of a water accumulation leaching device, the pollutant concentrations considerably decreased, resulting in significant adsorption and migration effects. Subsequently, the adsorption effect was significantly reduced. The adsorption rate of sodium benzoate and sodium hyponitrotriacetate increased with an increase in the emulsion concentration on the 30th day. The adsorption rate of sodium nitrite in 1 L mine water with 20 mL emulsion on the 30 th day was 86.4%. The noncarcinogenic health risk assessment and exposure index (EI) model calculations of the simulated mine water containing emulsion revealed that all the hazard quotient (HQ) and EI values of carcinogens were >1. Furthermore, reference pollutant concentrations under the specific conditions of HQ and EI were obtained. These study findings are expected to provide scientific data support for local governments to strengthen geological environment management in mining areas.","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":"29 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661324","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}
Muhammad Yousaf Ali, Irfan Ashraf, Ishtiaq Ahmed, Rashid Iqbal, A. Ditta, Vinoth Kumarasamy, Sayed M. Eldin, Iftikhar Ali, M. Alwahibi, M. Elshikh
Abiotic stress, especially salinization, is considered a major soil problem in arid and semiarid regions. To combat salinization, halophytes such as date palms are grown in these areas. However, less information is available on the morphological and biochemical responses of different date palm cultivars under high salinity. In this regard, eight cultivars of date palm were selected and treated with different salinity levels to check the adaptive capabilities of these cultivars against salt stress in terms of morphological and biochemical attributes. The objective of the current study was to screen these cultivars for tolerance or susceptibility to salt stress (0, 50, 100, and 200 mM NaCl). The results of the morphological parameters revealed the negative impact of salt stress on the morphology. Higher concentrations of salt reduced the plant height (Haleemi, Dahakki, Sanduri, Saghoi, Tarwali, and Hamanwali), the number of leaves (Haleemi, Basrawali, Dhakki, Sanduri, Saghoi, and Gajjar),
{"title":"Characterization of Salt-Tolerant Cultivars\u0000of Date Palm Based on Morphological and\u0000Biochemical Responses Under Salinity Stress","authors":"Muhammad Yousaf Ali, Irfan Ashraf, Ishtiaq Ahmed, Rashid Iqbal, A. Ditta, Vinoth Kumarasamy, Sayed M. Eldin, Iftikhar Ali, M. Alwahibi, M. Elshikh","doi":"10.15244/pjoes/177179","DOIUrl":"https://doi.org/10.15244/pjoes/177179","url":null,"abstract":"Abiotic stress, especially salinization, is considered a major soil problem in arid and semiarid regions. To combat salinization, halophytes such as date palms are grown in these areas. However, less information is available on the morphological and biochemical responses of different date palm cultivars under high salinity. In this regard, eight cultivars of date palm were selected and treated with different salinity levels to check the adaptive capabilities of these cultivars against salt stress in terms of morphological and biochemical attributes. The objective of the current study was to screen these cultivars for tolerance or susceptibility to salt stress (0, 50, 100, and 200 mM NaCl). The results of the morphological parameters revealed the negative impact of salt stress on the morphology. Higher concentrations of salt reduced the plant height (Haleemi, Dahakki, Sanduri, Saghoi, Tarwali, and Hamanwali), the number of leaves (Haleemi, Basrawali, Dhakki, Sanduri, Saghoi, and Gajjar),","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":"41 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140677579","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}
Meina Li, Jianwei Meng, Dan Lin, Peng Xu, Lei Wang, Yanqiao Hu, Chong Qin, Liangcheng Zhao, Yu Xia, Liangyu Zhang, Huajie Liu
Tangshan is known as a typical heavy industrial city with serious atmospheric pollution. It suffers the most serious atmospheric pollution during the winter heating period. This study aims to explore the level and spatial distribution of atmospheric element deposition in the study area and validate the suitability of Ramalina sinensis ( RSI ) as an active biomonitor in North China cities. RSI was transplanted to Tangshan in winter (Dec. 2016-Mar. 2017) and exposed for 17 weeks. The concentration of 51 elements was tested using an ICP-MS (inductively coupled plasma mass spectrometer). The results showed that the exposure concentration of all elements but Ag was significantly higher than the background value. Principal component analysis (PCA) showed that K, P, and Rb were separated into the group G5, and these nutrients have a lower level of bioaccumulation than other groups. The remaining 47 elements were classified into groups G1 (Al, Be, Co, Cr, Cs, Ge, Li, Nb, Ni, Si, Th, Ti, U, V, and 16 rare earth elements La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and Sc) of crustal origin, G2 (Ca, Cd, Cu, Mg, Mn, Mo, S, Sb, Sr, and Zn) and G3 (Bi, Pb, and Sn) of atmospheric origin, and G4 (As, Fe, Se, and Tl) of crustal-atmospheric origin. The overall bioaccumulation in Tangshan is moderate (PLI zone = 2.010 for the combined groups G1-4), with the highest bioaccumulation level (high to severe) for the atmospheric group G2. The most concerned elements are Ca and S, which are of high bioaccumulation at the regional scale. All element groups show a similar spatial pattern characterized by decreasing atmospheric deposition from east to west and from rural to urban areas. These results indicate that RSI is a good active biomonitor for most elements, barring some nutrients. The importance of G2 elements should be emphasized as an indicator of anthropogenic emissions in lichen-active biomonitoring techniques in North China cities. The study area experienced a certain degree of atmospheric pollution, contributed mainly by the frequent industrial and agricultural activities and coal combustion for heating in the east of the city and the rural areas around. This study is the first to monitor atmospheric deposition in industrial cities in North China using the active lichen biomonitoring method.
{"title":"Active Biomonitoring of Atmospheric Element\u0000Deposition in the Heating Period of Tangshan\u0000Using Ramalina sinensis","authors":"Meina Li, Jianwei Meng, Dan Lin, Peng Xu, Lei Wang, Yanqiao Hu, Chong Qin, Liangcheng Zhao, Yu Xia, Liangyu Zhang, Huajie Liu","doi":"10.15244/pjoes/183500","DOIUrl":"https://doi.org/10.15244/pjoes/183500","url":null,"abstract":"Tangshan is known as a typical heavy industrial city with serious atmospheric pollution. It suffers the most serious atmospheric pollution during the winter heating period. This study aims to explore the level and spatial distribution of atmospheric element deposition in the study area and validate the suitability of Ramalina sinensis ( RSI ) as an active biomonitor in North China cities. RSI was transplanted to Tangshan in winter (Dec. 2016-Mar. 2017) and exposed for 17 weeks. The concentration of 51 elements was tested using an ICP-MS (inductively coupled plasma mass spectrometer). The results showed that the exposure concentration of all elements but Ag was significantly higher than the background value. Principal component analysis (PCA) showed that K, P, and Rb were separated into the group G5, and these nutrients have a lower level of bioaccumulation than other groups. The remaining 47 elements were classified into groups G1 (Al, Be, Co, Cr, Cs, Ge, Li, Nb, Ni, Si, Th, Ti, U, V, and 16 rare earth elements La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and Sc) of crustal origin, G2 (Ca, Cd, Cu, Mg, Mn, Mo, S, Sb, Sr, and Zn) and G3 (Bi, Pb, and Sn) of atmospheric origin, and G4 (As, Fe, Se, and Tl) of crustal-atmospheric origin. The overall bioaccumulation in Tangshan is moderate (PLI zone = 2.010 for the combined groups G1-4), with the highest bioaccumulation level (high to severe) for the atmospheric group G2. The most concerned elements are Ca and S, which are of high bioaccumulation at the regional scale. All element groups show a similar spatial pattern characterized by decreasing atmospheric deposition from east to west and from rural to urban areas. These results indicate that RSI is a good active biomonitor for most elements, barring some nutrients. The importance of G2 elements should be emphasized as an indicator of anthropogenic emissions in lichen-active biomonitoring techniques in North China cities. The study area experienced a certain degree of atmospheric pollution, contributed mainly by the frequent industrial and agricultural activities and coal combustion for heating in the east of the city and the rural areas around. This study is the first to monitor atmospheric deposition in industrial cities in North China using the active lichen biomonitoring method.","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":"14 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140673872","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}
Hanh Thi Minh Pham, Ba The Dang, Cuong Tu Ho, Nghi Thanh Duong, Hanh Thi Nguyen, Quynh Phuong Thi Le, Thuy Thi Duong, Ha Manh Bui
: This study investigates methane emissions in the mangrove forests of Xuan Thuy National Park in Vietnam, examining seasonal variations and the influence of environmental factors. Data from the field measurements present methane flux rates ranging from 0.01 to 10.42 mg m−2 day−1, are substantially lower than the default estimations recommended by IPCC guidelines. The study highlights discrepancies between actual field measurements and suggested default values, emphasizing the necessity for site-specific monitoring to avoid overestimating greenhouse gas emissions, particularly in mangrove areas. The analysis reveals strong correlations between methane flux and environmental parameters. Factors such as water pH, turbidity, temperature, and nitrogen content significantly influence methane emissions. The study emphasizes the interconnectedness of various greenhouse gas emissions within mangrove ecosystems and underlines the importance of accurate, location-specific data in environmental assessments and policy-making
{"title":"Methane Emission in Mangrove Forests:\u0000Field Study and Environmental Correlations from\u0000Xuan Thuy National Park, Vietnam","authors":"Hanh Thi Minh Pham, Ba The Dang, Cuong Tu Ho, Nghi Thanh Duong, Hanh Thi Nguyen, Quynh Phuong Thi Le, Thuy Thi Duong, Ha Manh Bui","doi":"10.15244/pjoes/183086","DOIUrl":"https://doi.org/10.15244/pjoes/183086","url":null,"abstract":": This study investigates methane emissions in the mangrove forests of Xuan Thuy National Park in Vietnam, examining seasonal variations and the influence of environmental factors. Data from the field measurements present methane flux rates ranging from 0.01 to 10.42 mg m−2 day−1, are substantially lower than the default estimations recommended by IPCC guidelines. The study highlights discrepancies between actual field measurements and suggested default values, emphasizing the necessity for site-specific monitoring to avoid overestimating greenhouse gas emissions, particularly in mangrove areas. The analysis reveals strong correlations between methane flux and environmental parameters. Factors such as water pH, turbidity, temperature, and nitrogen content significantly influence methane emissions. The study emphasizes the interconnectedness of various greenhouse gas emissions within mangrove ecosystems and underlines the importance of accurate, location-specific data in environmental assessments and policy-making","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":"63 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140675662","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}
Based on panel data from 286 cities at the prefecture level and above in China spanning from 2010 to 2020 and utilizing the digital economy development objectives advanced by the “Broadband China” strategy in 2014 as a natural experiment, we employed the double-difference method to examine the impact of digital economy development on urban environmental pollution management and its underlying mechanisms. The study reveals that the “Broadband China” pilot policy significantly influences the level of environmental pollution control when compared to non-demonstration cities. This conclusion still holds after a series of robustness tests. The mechanism analysis demonstrates that the “Broadband China” pilot policy affects the level of environmental pollution control by enhancing regional innovation capacity and upgrading the industrial structure. Moreover, heterogeneity analysis indicates that the influence of the “Broadband China” pilot policy on environmental pollution control varies depending on location choice, city size, and degree of urbanization. Notably, the impact of constructing demonstration cities is particularly pronounced in the eastern region, larger cities, and areas with higher urbanization rates. This study holds significant implications for enhancing the urban ecological environment and achieving high-quality development.
{"title":"Research on the Impact of Digital Economy\u0000on Environmental Pollution Management\u0000– A Quasi-Natural Experiment\u0000from the “Broadband China” Pilot Policy","authors":"Liang Qu, Yueting Shao, Pengzhen Liu","doi":"10.15244/pjoes/177161","DOIUrl":"https://doi.org/10.15244/pjoes/177161","url":null,"abstract":"Based on panel data from 286 cities at the prefecture level and above in China spanning from 2010 to 2020 and utilizing the digital economy development objectives advanced by the “Broadband China” strategy in 2014 as a natural experiment, we employed the double-difference method to examine the impact of digital economy development on urban environmental pollution management and its underlying mechanisms. The study reveals that the “Broadband China” pilot policy significantly influences the level of environmental pollution control when compared to non-demonstration cities. This conclusion still holds after a series of robustness tests. The mechanism analysis demonstrates that the “Broadband China” pilot policy affects the level of environmental pollution control by enhancing regional innovation capacity and upgrading the industrial structure. Moreover, heterogeneity analysis indicates that the influence of the “Broadband China” pilot policy on environmental pollution control varies depending on location choice, city size, and degree of urbanization. Notably, the impact of constructing demonstration cities is particularly pronounced in the eastern region, larger cities, and areas with higher urbanization rates. This study holds significant implications for enhancing the urban ecological environment and achieving high-quality development.","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":"22 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140678049","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 paper uses the web crawler method to obtain information on the distribution of commercial bank branches in China and uses the multidimensional fixed-effects model to explore the impact of commercial bank expansion on firm pollution emissions and its mechanism. The findings reveal that commercial bank expansion significantly reduces firms’ pollution emissions and that there is an optimal geographical radius for this suppression effect. The number of commercial bank branches within 20 km of the firm has the biggest inhibiting influence on the firm’s pollution emission, which diminishes as geographical distance increases. This dampening effect remains robust after testing using the instrumental variable method and the Difference-In-Differences method. Examination of heterogeneity demonstrates that the influence of commercial bank expansion on firm pollution emission depends on the degree of regional low-carbon policies and laws, the level of pollution in the industry, and capital intensity of the industry, as well as the firm’s size and ownership. The mechanism test proves that commercial bank expansion reduces firm pollution emissions by promoting technological progress and increasing their investment in pollution reduction.
{"title":"Commercial Bank Expansion\u0000and Environmental Pollution: Micro\u0000Evidence from Industrial Firms in China","authors":"Shengrui Li, Leyi Chen, Pingguo Xu","doi":"10.15244/pjoes/176056","DOIUrl":"https://doi.org/10.15244/pjoes/176056","url":null,"abstract":"This paper uses the web crawler method to obtain information on the distribution of commercial bank branches in China and uses the multidimensional fixed-effects model to explore the impact of commercial bank expansion on firm pollution emissions and its mechanism. The findings reveal that commercial bank expansion significantly reduces firms’ pollution emissions and that there is an optimal geographical radius for this suppression effect. The number of commercial bank branches within 20 km of the firm has the biggest inhibiting influence on the firm’s pollution emission, which diminishes as geographical distance increases. This dampening effect remains robust after testing using the instrumental variable method and the Difference-In-Differences method. Examination of heterogeneity demonstrates that the influence of commercial bank expansion on firm pollution emission depends on the degree of regional low-carbon policies and laws, the level of pollution in the industry, and capital intensity of the industry, as well as the firm’s size and ownership. The mechanism test proves that commercial bank expansion reduces firm pollution emissions by promoting technological progress and increasing their investment in pollution reduction.","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":" 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140682743","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}
A. Tileuberdi, Altybayev Zhaksylyk, Dana Pazylova, Nurila Sagyndykova, Alibek Tleuov, S. Tleuova
Every year, the problem of environmental pollution from metallurgical waste is gaining momentum. In particular, these are metallurgical wastes containing residual metals. However, with the help of innovative methods of processing lead-containing slags, they can be turned into valuable resources with minimal impact on the environment. This article discusses the importance of recycling lead-containing slag and describes various methods of recycling. The scientific novelty of the article is to analyze the influence of the content of toxic metals, such as lead, chromium, zinc
{"title":"Mathematical Approach to Solving\u0000the Problem of Waste-Free Processing\u0000of Metallurgical Wastes","authors":"A. Tileuberdi, Altybayev Zhaksylyk, Dana Pazylova, Nurila Sagyndykova, Alibek Tleuov, S. Tleuova","doi":"10.15244/pjoes/183431","DOIUrl":"https://doi.org/10.15244/pjoes/183431","url":null,"abstract":"Every year, the problem of environmental pollution from metallurgical waste is gaining momentum. In particular, these are metallurgical wastes containing residual metals. However, with the help of innovative methods of processing lead-containing slags, they can be turned into valuable resources with minimal impact on the environment. This article discusses the importance of recycling lead-containing slag and describes various methods of recycling. The scientific novelty of the article is to analyze the influence of the content of toxic metals, such as lead, chromium, zinc","PeriodicalId":510399,"journal":{"name":"Polish Journal of Environmental Studies","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140684456","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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