Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103406
Porraket Dechdacho, Saige Howard, Ronald L. Hershey, Rishi Parashar, Lazaro J. Perez
This study investigates the potential of an iron-based metal–organic framework (MOF) material, Fe-benzene-1,3,5-tricarboxylate (Fe-BTC), for arsenic removal from water. We conducted batch and column experiments to evaluate the effects of varying mass dosages of MOF and pH ranges on arsenic adsorption. Our batch experiments revealed that increasing the mass of Fe-BTC MOF led to higher adsorption capacity. Furthermore, within the range of pH values analyzed, Fe-BTC demonstrated stable arsenic adsorption capacity, suggesting that pH conditions did not significantly affect its performance. In the column experiments, we used granitic material amended with compost and compared arsenic concentration breakthrough curves with and without the presence of MOF to assess its efficiency in arsenic removal. Without MOF, we observed rapid arsenic arrival followed by a slow increase in concentration, indicating anomalous transport dynamics induced by the compost. The addition of MOF resulted in prolonged arsenic arrival and a stabilized lower concentration, indicating effective arsenic adsorption. Fe-BTC MOF exhibited a six-fold increase in arsenic adsorption compared to its absence when added to the soil material. We employed a fractional order advection–dispersion equation model to characterize and predict the physical and chemical dynamics in the column experiments. The transport model accurately matched the arsenic breakthrough curves in the column experiments by capturing the non-Fickian transport and sorption chemical dynamics. The model indicated that compost had an insignificant impact on arsenic adsorption due to flow heterogeneity, while higher dosages of MOF resulted in increased arsenic adsorption and non-Fickian dynamics.
{"title":"Effective removal of arsenic from contaminated groundwater using an iron-based metal organic framework","authors":"Porraket Dechdacho, Saige Howard, Ronald L. Hershey, Rishi Parashar, Lazaro J. Perez","doi":"10.1016/j.eti.2023.103406","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103406","url":null,"abstract":"This study investigates the potential of an iron-based metal–organic framework (MOF) material, Fe-benzene-1,3,5-tricarboxylate (Fe-BTC), for arsenic removal from water. We conducted batch and column experiments to evaluate the effects of varying mass dosages of MOF and pH ranges on arsenic adsorption. Our batch experiments revealed that increasing the mass of Fe-BTC MOF led to higher adsorption capacity. Furthermore, within the range of pH values analyzed, Fe-BTC demonstrated stable arsenic adsorption capacity, suggesting that pH conditions did not significantly affect its performance. In the column experiments, we used granitic material amended with compost and compared arsenic concentration breakthrough curves with and without the presence of MOF to assess its efficiency in arsenic removal. Without MOF, we observed rapid arsenic arrival followed by a slow increase in concentration, indicating anomalous transport dynamics induced by the compost. The addition of MOF resulted in prolonged arsenic arrival and a stabilized lower concentration, indicating effective arsenic adsorption. Fe-BTC MOF exhibited a six-fold increase in arsenic adsorption compared to its absence when added to the soil material. We employed a fractional order advection–dispersion equation model to characterize and predict the physical and chemical dynamics in the column experiments. The transport model accurately matched the arsenic breakthrough curves in the column experiments by capturing the non-Fickian transport and sorption chemical dynamics. The model indicated that compost had an insignificant impact on arsenic adsorption due to flow heterogeneity, while higher dosages of MOF resulted in increased arsenic adsorption and non-Fickian dynamics.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"68 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135061608","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}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103435
Hong Li, Liping Yang, Qiaozhi Mao, Haixia Zhou, Pan Guo, Evgenios Agathokleous, Shufeng Wang
Biochar, as an emerging soil remediation technology, has gained substantial attention. However, the impact of modified biochar on soil fertility, nutrient uptake, and rice yield in mercury (Hg)-contaminated soil remains unclear. This study explores the influence of biochar on soil fertility, nutrient absorption, photosynthesis, and rice yield in Hg-contaminated soil. We analyzed soil physicochemical properties, nutrient distribution (nitrogen, phosphorus and potassium) in roots, stems, and leaves, as well as plant gas exchange traits and yield components to provide a comprehensive assessment. Two experiments were conducted using original biochar (BC), produced via direct combustion and rice husk cracking, along with six types of modified biochar [amino (BCNH2), epoxy (BCCH(O)CH), ethoxy (BCC2H5O), sulfhydryl (BCSH), selenium (BCSe) loaded, and chitosan (BCchitosan)]. These biochars were applied at four different concentrations (0.07, 0.14, 0.20 and 0.35%). Comparative analysis against the control revealed that the application of modified biochar, particularly BCNH2, BCC2H5O and BCSH, significantly enhanced soil organic matter and plant nutrients (total N, available P, available K). Furthermore, it promoted the uptake of N, P, and K by rice leaves. The biochar addition exhibited a positive impact on rice photosynthesis and yield within a specific range of concentrations. A comprehensive analysis indicates that soil fertility, photosynthesis, and rice yield were significantly enhanced when BCNH2, BCC2H5O, and BCSH were applied at 0.20% under the study conditions. These findings advance our understanding of how biochar affects soil fertility, nutrient uptake, and rice yield, offering valuable insights for practical agricultural and environmental management in Hg-contaminated fields.
{"title":"Modified biochar enhances soil fertility and nutrient uptake and yield of rice in mercury-contaminated soil","authors":"Hong Li, Liping Yang, Qiaozhi Mao, Haixia Zhou, Pan Guo, Evgenios Agathokleous, Shufeng Wang","doi":"10.1016/j.eti.2023.103435","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103435","url":null,"abstract":"Biochar, as an emerging soil remediation technology, has gained substantial attention. However, the impact of modified biochar on soil fertility, nutrient uptake, and rice yield in mercury (Hg)-contaminated soil remains unclear. This study explores the influence of biochar on soil fertility, nutrient absorption, photosynthesis, and rice yield in Hg-contaminated soil. We analyzed soil physicochemical properties, nutrient distribution (nitrogen, phosphorus and potassium) in roots, stems, and leaves, as well as plant gas exchange traits and yield components to provide a comprehensive assessment. Two experiments were conducted using original biochar (BC), produced via direct combustion and rice husk cracking, along with six types of modified biochar [amino (BCNH2), epoxy (BCCH(O)CH), ethoxy (BCC2H5O), sulfhydryl (BCSH), selenium (BCSe) loaded, and chitosan (BCchitosan)]. These biochars were applied at four different concentrations (0.07, 0.14, 0.20 and 0.35%). Comparative analysis against the control revealed that the application of modified biochar, particularly BCNH2, BCC2H5O and BCSH, significantly enhanced soil organic matter and plant nutrients (total N, available P, available K). Furthermore, it promoted the uptake of N, P, and K by rice leaves. The biochar addition exhibited a positive impact on rice photosynthesis and yield within a specific range of concentrations. A comprehensive analysis indicates that soil fertility, photosynthesis, and rice yield were significantly enhanced when BCNH2, BCC2H5O, and BCSH were applied at 0.20% under the study conditions. These findings advance our understanding of how biochar affects soil fertility, nutrient uptake, and rice yield, offering valuable insights for practical agricultural and environmental management in Hg-contaminated fields.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"56 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510144","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}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103366
Muhammad Ali Ijaz Malik, M.A. Kalam, M.A. Mujtaba, Fares Almomani
Conventional petroleum-based lubricant resources are depleting rapidly, and their utilization severely threatens the environment. Environmental sustainability emphasizes the need for an alternative to petroleum resources. The lubricants play a significant role in machinery’s adequate energy-saving performance. Therefore, the tribological aspects of machinery’s maximum efficiency should be considered. The current study reviews the part of bio-lubricants towards environmental sustainability. This review has been conducted according to the PRISMA approach, where the sources of bio-lubricants, tribological performance, the role of additives and nanoparticles, benefits and disadvantages, production techniques, economic aspects, and future scope were explored and discussed. Bio-lubricants possess a better viscosity index, lubricity, biodegradability, and non-toxic and renewable nature than petroleum lubricants. However, lower thermo-oxidative stability and higher pour points due to moisture content require further improvements. Food security is another significant concern for bio-lubricants. Consequently, it emphasized the importance of algae-based bio-lubricant sources in reducing the threat to food security, water purification, and greenhouse gas mitigation. Further improvements and optimization of production methods are required to increase lubricant yield rates and promote sustainability. The importance of new (algae-based) bio lubricant substitutes with details of their physicochemical properties for a sustainable future is highlighted in this review research.
{"title":"A review of recent advances in the synthesis of environmentally friendly, sustainable, and nontoxic bio-lubricants: Recommendations for the future implementations","authors":"Muhammad Ali Ijaz Malik, M.A. Kalam, M.A. Mujtaba, Fares Almomani","doi":"10.1016/j.eti.2023.103366","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103366","url":null,"abstract":"Conventional petroleum-based lubricant resources are depleting rapidly, and their utilization severely threatens the environment. Environmental sustainability emphasizes the need for an alternative to petroleum resources. The lubricants play a significant role in machinery’s adequate energy-saving performance. Therefore, the tribological aspects of machinery’s maximum efficiency should be considered. The current study reviews the part of bio-lubricants towards environmental sustainability. This review has been conducted according to the PRISMA approach, where the sources of bio-lubricants, tribological performance, the role of additives and nanoparticles, benefits and disadvantages, production techniques, economic aspects, and future scope were explored and discussed. Bio-lubricants possess a better viscosity index, lubricity, biodegradability, and non-toxic and renewable nature than petroleum lubricants. However, lower thermo-oxidative stability and higher pour points due to moisture content require further improvements. Food security is another significant concern for bio-lubricants. Consequently, it emphasized the importance of algae-based bio-lubricant sources in reducing the threat to food security, water purification, and greenhouse gas mitigation. Further improvements and optimization of production methods are required to increase lubricant yield rates and promote sustainability. The importance of new (algae-based) bio lubricant substitutes with details of their physicochemical properties for a sustainable future is highlighted in this review research.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"17 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134996290","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}
Extensive use of enrofloxacin (ENR) leads to its widespread presence in soil, which seriously threatens the soil ecological environment and biogeochemical cycles. Thus, it is very important to comprehend the fate of ENR and its effect on nitrogen cycling in farmland soil. In this investigation, quantitative real-time PCR and 16 S rRNA genes amplicon sequencing were used to analyze the microbiological mechanism of the effects of ENR on the soil nitrification and denitrification processes of farmland. The results showed that the addition of ENR suppressed the ammoniation process, leading to a decline in NH4+-N content. Additionally, ENR led to a decrease in the soil nitrification potential by decreasing the relative abundance of Nitrosomonas and Nitrosospira. However, ENR inhibited the relative abundance of narG, as well as the activity of nitrate reductase, which led to the accumulation of NO3--N. Furthermore, ENR increased the possibility of nitrous oxide emissions by increasing the relative abundances of Flavobacterium, Bacillus and Aeromonas, as well as those of nirS and nosZ. This study provided data to support for the ecological impact and risk assessment of ENR on nitrogen cycling in farmland soil.
{"title":"Effects of enrofloxacin on soil nitrification and denitrification: A microbiological study","authors":"Jianpeng Gao, Chang Wei, Tian-Jin Mo, Yu Yan, Yan Sun, Huayi Chen, Yulong Zhang, Jinjin Wang, Yongtao Li, Hui-Juan Xu","doi":"10.1016/j.eti.2023.103415","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103415","url":null,"abstract":"Extensive use of enrofloxacin (ENR) leads to its widespread presence in soil, which seriously threatens the soil ecological environment and biogeochemical cycles. Thus, it is very important to comprehend the fate of ENR and its effect on nitrogen cycling in farmland soil. In this investigation, quantitative real-time PCR and 16 S rRNA genes amplicon sequencing were used to analyze the microbiological mechanism of the effects of ENR on the soil nitrification and denitrification processes of farmland. The results showed that the addition of ENR suppressed the ammoniation process, leading to a decline in NH4+-N content. Additionally, ENR led to a decrease in the soil nitrification potential by decreasing the relative abundance of Nitrosomonas and Nitrosospira. However, ENR inhibited the relative abundance of narG, as well as the activity of nitrate reductase, which led to the accumulation of NO3--N. Furthermore, ENR increased the possibility of nitrous oxide emissions by increasing the relative abundances of Flavobacterium, Bacillus and Aeromonas, as well as those of nirS and nosZ. This study provided data to support for the ecological impact and risk assessment of ENR on nitrogen cycling in farmland soil.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135849259","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}
Pub Date : 2023-10-01DOI: 10.1016/j.eti.2023.103407
Manuela Rozalia Gabor, Mirela Panait, Ioan Bogdan Bacoş, Laura Elly Naghi, Flavia Dana Oltean
Tourism is an important sector of the world economy, significantly contributing to the creation of GDP in certain countries. Despite the positive effects recorded at the economic and social levels, researchers began to highlight the negative externalities generated by tourism on the environment, via air, soil and water degradation. Structural Equation Model (SEM) framework with SPSS—AMOS 22.0 software was used to investigate the total, direct and indirect effects of the independent variable on the dependent variable (Municipal waste) considering the intervening effects of the mediators. This method has been employed in the case of all 30 European countries under focus. As independent variables of SEM, after the numerous variants testes and analysis of the model, we used as follows: TTCI, average stays, HDI, GDP, tourism in GDP (%), PM 10, PM 2.5, CO2, Consumption of renewable resources (%) and Circular material uses rate (CMR) (%). The main conclusions of the study regard, on the one hand, the negative impact that both the increase of average stay/tourists’ arrivals/overnight stays and the decrease of tourism competitiveness rank (from the last to the first rank) have on waste management and environment pollution. On the other hand, the improvement of circular economy indicators (consumption of renewable resources and circular material uses rate) has a positive impact on waste management and environment pollution in European countries.
{"title":"CIRCULAR TOURISM ECONOMY IN EUROPEAN UNION BETWEEN COMPETITIVENESS, RISK AND SUSTAINABILITY","authors":"Manuela Rozalia Gabor, Mirela Panait, Ioan Bogdan Bacoş, Laura Elly Naghi, Flavia Dana Oltean","doi":"10.1016/j.eti.2023.103407","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103407","url":null,"abstract":"Tourism is an important sector of the world economy, significantly contributing to the creation of GDP in certain countries. Despite the positive effects recorded at the economic and social levels, researchers began to highlight the negative externalities generated by tourism on the environment, via air, soil and water degradation. Structural Equation Model (SEM) framework with SPSS—AMOS 22.0 software was used to investigate the total, direct and indirect effects of the independent variable on the dependent variable (Municipal waste) considering the intervening effects of the mediators. This method has been employed in the case of all 30 European countries under focus. As independent variables of SEM, after the numerous variants testes and analysis of the model, we used as follows: TTCI, average stays, HDI, GDP, tourism in GDP (%), PM 10, PM 2.5, CO2, Consumption of renewable resources (%) and Circular material uses rate (CMR) (%). The main conclusions of the study regard, on the one hand, the negative impact that both the increase of average stay/tourists’ arrivals/overnight stays and the decrease of tourism competitiveness rank (from the last to the first rank) have on waste management and environment pollution. On the other hand, the improvement of circular economy indicators (consumption of renewable resources and circular material uses rate) has a positive impact on waste management and environment pollution in European countries.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135662293","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}
Pub Date : 2023-10-01DOI: 10.1016/j.eti.2023.103404
Jari S. Algethami, Mohsen A.M. Alhamami, Ayoub Abdullah Alqadami, Saad Melhi, Amal F. Seliem
In this study, a novel and effective magnetic watermelon seed hydrochar (MWSHC) was successfully synthesized via hydrothermal carbonization technique and in situ co-precipitation method. The prepared magnetic watermelon seed waste hydrochar has been utilized for the elimination of cadmium ions from the aqueous environment. The structural morphology, surface properties, and thermal stability of MWSHC adsorbent were characterized using FTIR, SEM, XRD, BET surface area, and TGA analysis, which demonstrated the successful synthesis of MWSHC. An extensive study of Cd(II) adsorption was conducted by assessing the influence of contact time, adsorbent mass, pH, initial Cd(II) concentration, temperature, and coexisting cations on the adsorption process of Cd(II). The results revealed that the removal efficiency of Cd(II) was 96.60% achieved at pH 7.0, time: 300 min, and dosage: 0.01 g, T: 298 K. Adsorption isotherm and kinetic parameters were estimated. The results indicated that the Cd(II) adsorption onto MWSHC followed the Freundlich and pseudo-second-order models. Based on the Langmuir equation, the MWSHC has a maximum adsorption capacity of 347.2 mg/g at 298 K. The reusability of magnetic hydrochar nanocomposite was studied, revealing that around 84.4% Cd(II) was still removed after four cycles. In conclusion, the newly- prepared MWSHC adsorbent has the advantages of high adsorption capacity, cost-effectiveness, and easy separation, thus having promising applications in effectively removing cadmium(II) from the aqueous environment.
{"title":"Adsorptive performance of a new magnetic hydrochar nanocomposite for highly efficient removal of cadmium ions from water: Mechanism, modeling, and reusability studies","authors":"Jari S. Algethami, Mohsen A.M. Alhamami, Ayoub Abdullah Alqadami, Saad Melhi, Amal F. Seliem","doi":"10.1016/j.eti.2023.103404","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103404","url":null,"abstract":"In this study, a novel and effective magnetic watermelon seed hydrochar (MWSHC) was successfully synthesized via hydrothermal carbonization technique and in situ co-precipitation method. The prepared magnetic watermelon seed waste hydrochar has been utilized for the elimination of cadmium ions from the aqueous environment. The structural morphology, surface properties, and thermal stability of MWSHC adsorbent were characterized using FTIR, SEM, XRD, BET surface area, and TGA analysis, which demonstrated the successful synthesis of MWSHC. An extensive study of Cd(II) adsorption was conducted by assessing the influence of contact time, adsorbent mass, pH, initial Cd(II) concentration, temperature, and coexisting cations on the adsorption process of Cd(II). The results revealed that the removal efficiency of Cd(II) was 96.60% achieved at pH 7.0, time: 300 min, and dosage: 0.01 g, T: 298 K. Adsorption isotherm and kinetic parameters were estimated. The results indicated that the Cd(II) adsorption onto MWSHC followed the Freundlich and pseudo-second-order models. Based on the Langmuir equation, the MWSHC has a maximum adsorption capacity of 347.2 mg/g at 298 K. The reusability of magnetic hydrochar nanocomposite was studied, revealing that around 84.4% Cd(II) was still removed after four cycles. In conclusion, the newly- prepared MWSHC adsorbent has the advantages of high adsorption capacity, cost-effectiveness, and easy separation, thus having promising applications in effectively removing cadmium(II) from the aqueous environment.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135663617","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}
Incorporating amendments can change soil organic carbon (SOC) components and biological properties, but the comprehensive utilization of straw and straw biochar in paddy soil remains poorly understood. We studied the changes in the pH, SOC content, labile organic C fractions, and soil microbial communities under alternating wetting and drying (AWD) and continuous flooding (CF). The results showed that the addition of straw and straw biochar increased SOC content, and the relative changes in microbial biomass carbon (MBC), dissolved organic carbon (DOC), and easily oxidizable carbon (EOC) were more sensitive than those in SOC, but soil pH was higher under AWD management than under CF management. Proteobacteria, Bacteroidetes, and Acidobacteria were the three most abundant bacterial phyla, and the three major abundant fungal phyla were Phragmoplastophyta, norank_Eukaryta, and Apicomplexa. A redundancy discriminant analysis (RDA) found that both straw and straw biochar were conducive to bacterial growth, and their combination was more beneficial for fungal growth and development. Aggregated boosted tree (ABT) and Structural equation modeling (SEM) showed that the soil MBC and EOC were the most important factors determining bacterial abundance and diversity, while pH, EOC, and MBC were the main factors influencing the abundance and diversity of fungi. This study explored the changes in SOC fractions and bacterial and fungal communities and provided a theoretical basis for an in-depth understanding of the influence of labile organic C pools on bacterial and fungal communities.
{"title":"Straw and straw biochar differently affect fractions of soil organic carbon and microorganisms in farmland soil under different water regimes","authors":"Limei Chen, Songlin Sun, Yaoyu Zhou, Bangxi Zhang, Yutao Peng, Yuchen Zhuo, Wenke Ai, Chongfeng Gao, Bei Wu, Dawei Liu, Chaoran Sun","doi":"10.1016/j.eti.2023.103412","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103412","url":null,"abstract":"Incorporating amendments can change soil organic carbon (SOC) components and biological properties, but the comprehensive utilization of straw and straw biochar in paddy soil remains poorly understood. We studied the changes in the pH, SOC content, labile organic C fractions, and soil microbial communities under alternating wetting and drying (AWD) and continuous flooding (CF). The results showed that the addition of straw and straw biochar increased SOC content, and the relative changes in microbial biomass carbon (MBC), dissolved organic carbon (DOC), and easily oxidizable carbon (EOC) were more sensitive than those in SOC, but soil pH was higher under AWD management than under CF management. Proteobacteria, Bacteroidetes, and Acidobacteria were the three most abundant bacterial phyla, and the three major abundant fungal phyla were Phragmoplastophyta, norank_Eukaryta, and Apicomplexa. A redundancy discriminant analysis (RDA) found that both straw and straw biochar were conducive to bacterial growth, and their combination was more beneficial for fungal growth and development. Aggregated boosted tree (ABT) and Structural equation modeling (SEM) showed that the soil MBC and EOC were the most important factors determining bacterial abundance and diversity, while pH, EOC, and MBC were the main factors influencing the abundance and diversity of fungi. This study explored the changes in SOC fractions and bacterial and fungal communities and provided a theoretical basis for an in-depth understanding of the influence of labile organic C pools on bacterial and fungal communities.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135809779","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}
Pub Date : 2023-10-01DOI: 10.1016/j.eti.2023.103413
Xuefei Tan, Huiwen Wang, Xiaoyan Guo, Shih-Hsin Ho
Removal of toxic pollutants from wastewater is equally important for aquatic ecology, human health, and sustainable societal development.Nitrogen-doped biochar (N-BC) is a novel carbon-rich material that can effectively remove various pollutants by the high-temperature pyrolysis of waste biomass. In the current work, the physicochemical properties of endogenous and exogenous biochar (BC) including differences in porosity, specific surface area, elemental composition, and active functional groups were compared and summarized. Subsequently, the application of N-BC to degrade pollutants in wastewater was reviewed according to different surface morphological characteristics of endogenous and exogenous BC. To better understand the interactions between N-BC and pollutants, the interaction mechanism was analyzed, especially by adsorption, surface redox, and catalytic reaction. Finally, the current technical bottlenecks in the field of sewage treatment were pointed out and future research directions were proposed. The work can serve as a valuable reference for high-value conversion of biomass and targeted preparation of N-BC to maximize environmental, social, and economic benefits.
{"title":"Effects of nitrogen doped-biochar on wastewater remediation","authors":"Xuefei Tan, Huiwen Wang, Xiaoyan Guo, Shih-Hsin Ho","doi":"10.1016/j.eti.2023.103413","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103413","url":null,"abstract":"Removal of toxic pollutants from wastewater is equally important for aquatic ecology, human health, and sustainable societal development.Nitrogen-doped biochar (N-BC) is a novel carbon-rich material that can effectively remove various pollutants by the high-temperature pyrolysis of waste biomass. In the current work, the physicochemical properties of endogenous and exogenous biochar (BC) including differences in porosity, specific surface area, elemental composition, and active functional groups were compared and summarized. Subsequently, the application of N-BC to degrade pollutants in wastewater was reviewed according to different surface morphological characteristics of endogenous and exogenous BC. To better understand the interactions between N-BC and pollutants, the interaction mechanism was analyzed, especially by adsorption, surface redox, and catalytic reaction. Finally, the current technical bottlenecks in the field of sewage treatment were pointed out and future research directions were proposed. The work can serve as a valuable reference for high-value conversion of biomass and targeted preparation of N-BC to maximize environmental, social, and economic benefits.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135850190","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 extensive use of plastic products by people has led to the prevalence of microplastics (MPs) in aquatic and terrestrial ecosystems. MPs will be able to undergo multiple aging processes and release dissolved organic matter (DOM) in the aquatic environment, thereby further affecting the ecosystem. Therefore, this thesis systematically investigated the photo-aging properties of polyvinyl chloride (PVC), and characterized the changes in physicochemical properties; in addition, the DOM composition and fluorescence characteristics of MPs leachate were characterized by using TOC and 3D-EEMs. Our results showed that the O/C ratio can quantitatively characterize the surface aging of MPs. Furthermore, We chose Malachite green (MG) and Sulfamethoxazole (SMX), which are abundantly present in the aqueous environment, as the target pollutants, through adsorption experiments we established the regression equations of the equilibrium adsorption capacity of aging MPs with O/C ratio or CI and mean particle size. Exploring the relationship between aging properties and the adsorption capacity of microplastics can help predict the degree of aging and accumulation of hydrophilic contaminants in the natural environment.
{"title":"Accelerated aging of polyvinyl chloride microplastics by UV irradiation: aging characteristics, filtrate analysis, and adsorption behavior","authors":"Kefu Wang, Kangkang Wang, Siqi Liang, Changyan Guo, Wei Wang, Jide Wang","doi":"10.1016/j.eti.2023.103405","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103405","url":null,"abstract":"The extensive use of plastic products by people has led to the prevalence of microplastics (MPs) in aquatic and terrestrial ecosystems. MPs will be able to undergo multiple aging processes and release dissolved organic matter (DOM) in the aquatic environment, thereby further affecting the ecosystem. Therefore, this thesis systematically investigated the photo-aging properties of polyvinyl chloride (PVC), and characterized the changes in physicochemical properties; in addition, the DOM composition and fluorescence characteristics of MPs leachate were characterized by using TOC and 3D-EEMs. Our results showed that the O/C ratio can quantitatively characterize the surface aging of MPs. Furthermore, We chose Malachite green (MG) and Sulfamethoxazole (SMX), which are abundantly present in the aqueous environment, as the target pollutants, through adsorption experiments we established the regression equations of the equilibrium adsorption capacity of aging MPs with O/C ratio or CI and mean particle size. Exploring the relationship between aging properties and the adsorption capacity of microplastics can help predict the degree of aging and accumulation of hydrophilic contaminants in the natural environment.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135660791","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}
Pub Date : 2023-10-01DOI: 10.1016/j.eti.2023.103416
Yijin Mei, Jin Pang, Xin Wang, Enqing Chen, Danlei Wu, Jianchao Ma
{"title":"Coal gangue geopolymers as sustainable and cost-effective adsorbents for efficient removal of Cu (II)","authors":"Yijin Mei, Jin Pang, Xin Wang, Enqing Chen, Danlei Wu, Jianchao Ma","doi":"10.1016/j.eti.2023.103416","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103416","url":null,"abstract":"","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136159582","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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