Polymeric materials have desirable chemical and physical properties leading to wide applications in consumer industries. However, such properties which include high hydrophobicity, crystallinity, strong chemical bonds and high molecular weight, inhibit natural biodegradation of plastics by wild-type microbes. This has led to the accumulation of microplastics and nanoplastics in the environment that is projected to be 12 000 million metric tons by the year 2050. Such accumulations bear serious health side effects on both terrestrial and marine ecosystems. Current methods used to control microplastics in the environment have proved inadequate due to high plastic productions and extensive uses. Biological methods of controlling plastic pollution which involve enzymes from various microbes, has emerged as an efficient, eco-friendly and sustainable alternative to plastic treatment and recycling. However, naturally occurring plastic biodegrading enzymes, possess limited biodegradation capacity due to low thermostability and biocatalytic activities thus limiting large scale applications. This review focuses on leveraged protein-enzyme genetic engineering techniques intended to improve catalytic performance of putative plastic biodegrading enzymes and production of environmentally friendly bioplastics from natural fibers as a substitute of synthetic petroleum based plastics. Genetically modified plastic degrading enzymes possess boosted substrate interaction, increased hydrophobicity, better catalytic efficiency, increased thermostability and optimized plastic biodegradability.
{"title":"Genetic engineering approach to address microplastic environmental pollution – critical review","authors":"D O Nyakundi, E O Mogusu, DN Kimaro","doi":"10.1680/jenes.22.00088","DOIUrl":"https://doi.org/10.1680/jenes.22.00088","url":null,"abstract":"Polymeric materials have desirable chemical and physical properties leading to wide applications in consumer industries. However, such properties which include high hydrophobicity, crystallinity, strong chemical bonds and high molecular weight, inhibit natural biodegradation of plastics by wild-type microbes. This has led to the accumulation of microplastics and nanoplastics in the environment that is projected to be 12 000 million metric tons by the year 2050. Such accumulations bear serious health side effects on both terrestrial and marine ecosystems. Current methods used to control microplastics in the environment have proved inadequate due to high plastic productions and extensive uses. Biological methods of controlling plastic pollution which involve enzymes from various microbes, has emerged as an efficient, eco-friendly and sustainable alternative to plastic treatment and recycling. However, naturally occurring plastic biodegrading enzymes, possess limited biodegradation capacity due to low thermostability and biocatalytic activities thus limiting large scale applications. This review focuses on leveraged protein-enzyme genetic engineering techniques intended to improve catalytic performance of putative plastic biodegrading enzymes and production of environmentally friendly bioplastics from natural fibers as a substitute of synthetic petroleum based plastics. Genetically modified plastic degrading enzymes possess boosted substrate interaction, increased hydrophobicity, better catalytic efficiency, increased thermostability and optimized plastic biodegradability.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135302437","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 present investigation introduces a novel approach on advanced biological remediation for heavy metal lead removal from industrial waste. The ongoing research collaborating theoretical insights with experimentally-derived data to develop strategies to operate bioreactor proficiently on large scale mode. Initially bacteria naturally well equipped with lead resistance has been isolated and identified from native source 16srDNA study along with other microbiological tests have been conducted with the isolated lead resistant bacterial cell and it has been revealed that the isolated lead resistant cell is Bacillus infantis 4352-1T. An extensive studies regarding cell growth of the candidate cell has been carried out in batch mode using well plugged 100 ml conical flasks placed on a rotary shaker under aseptic condition to determine the activity of Bacillus infantis 4352-1T towards its lead removal.Then an attempt has been made to set out to formulate an equation that characterizes the growth kinetics of the lead-resistant Bacillus infantis 4352-1T under lead microenvironment. Through a combination of theoretical analysis and experimental data, it has been observed that Monod’s equation accurately describes the cell growth progress within concentration range of lead (0.05-0.25 kg lead/m 3 ). In this range a theoretical analysis with the help of experimental data is not only confirmed the validity of Monods equation within the concentration range (0.05-0.25 kg lead/m 3 ) but also helped to derive the maximum specific cell growth rate 0.0237 hr −1 and substrate saturation constant 0.018 kg/m 3 . Interestingly, further experiments has been conducted with lead concentrations beyond 0.25 kg lead/m 3 and upto 0.43 kg lead/m 3 show a swift declining in the specific cell growth rate signifying pronounced effect of substrate inhibition clarified through Haldane equation quantitatively.
{"title":"Investigation on growth modeling and kinetic analysis of lead-resistant bacteria <i>Bacillus infantis</i> isolated from battery industry waste mud","authors":"Moumita Bose, Tapobrata Dey","doi":"10.1680/jenes.23.00035","DOIUrl":"https://doi.org/10.1680/jenes.23.00035","url":null,"abstract":"The present investigation introduces a novel approach on advanced biological remediation for heavy metal lead removal from industrial waste. The ongoing research collaborating theoretical insights with experimentally-derived data to develop strategies to operate bioreactor proficiently on large scale mode. Initially bacteria naturally well equipped with lead resistance has been isolated and identified from native source 16srDNA study along with other microbiological tests have been conducted with the isolated lead resistant bacterial cell and it has been revealed that the isolated lead resistant cell is Bacillus infantis 4352-1T. An extensive studies regarding cell growth of the candidate cell has been carried out in batch mode using well plugged 100 ml conical flasks placed on a rotary shaker under aseptic condition to determine the activity of Bacillus infantis 4352-1T towards its lead removal.Then an attempt has been made to set out to formulate an equation that characterizes the growth kinetics of the lead-resistant Bacillus infantis 4352-1T under lead microenvironment. Through a combination of theoretical analysis and experimental data, it has been observed that Monod’s equation accurately describes the cell growth progress within concentration range of lead (0.05-0.25 kg lead/m 3 ). In this range a theoretical analysis with the help of experimental data is not only confirmed the validity of Monods equation within the concentration range (0.05-0.25 kg lead/m 3 ) but also helped to derive the maximum specific cell growth rate 0.0237 hr −1 and substrate saturation constant 0.018 kg/m 3 . Interestingly, further experiments has been conducted with lead concentrations beyond 0.25 kg lead/m 3 and upto 0.43 kg lead/m 3 show a swift declining in the specific cell growth rate signifying pronounced effect of substrate inhibition clarified through Haldane equation quantitatively.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135481062","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 leather industry is currently under severe threat from efforts to eliminate environmental pollution issues caused by the generation of leather waste. Landfills must be used to dispose of leather waste, which harms the environment. Use of different chemicals during leather processing produces wastes in solid, liquid and gaseous form: contribute to environmental pollution. The development of leather/paper waste-based materials is an offer promoted by the recycled leather industry. A study is conducted into this work to prepare a polymerized electrolytic solution (PES) from chrome-containing leather waste (CCLW) for carbonized particles (CP), microfibrillated cellulose (MCF), and polyethylene glycol (PEG) for their potential use in sustainable energy production. In this method consuming power (rechargeable) is based on the redox process. Field emission-scanning electron microscopy (FE-SEM), Energy-dispersive X-ray spectroscopy (EDX), and Fourier-transform infrared spectroscopy (FTIR) were used to investigate the physical and chemical features of PES. On PES, energy generation was demonstrated using a multimeter and rheological properties. The results show that energy was produced with a voltage of 1101.12 ± 1.00 mV per cell, a current of 639.12 ± 0.42 mA per cell, and a resistance of 88.77 ± 0.17 per cell. Rheological tests were conducted at 25 °C with 8% wt/vol of PES and gradually increased shear-strain rates of 0.01 to 100 s−1. This work presents the environmental results of a study effort on the comparative examination of solutions for material and energy recovery from waste, along with those derived from mass and energy balances.
{"title":"Carbonization of chrome containing waste: Sustainable energy, cost-effective and recycling","authors":"R. Senthil","doi":"10.1680/jenes.23.00046","DOIUrl":"https://doi.org/10.1680/jenes.23.00046","url":null,"abstract":"The leather industry is currently under severe threat from efforts to eliminate environmental pollution issues caused by the generation of leather waste. Landfills must be used to dispose of leather waste, which harms the environment. Use of different chemicals during leather processing produces wastes in solid, liquid and gaseous form: contribute to environmental pollution. The development of leather/paper waste-based materials is an offer promoted by the recycled leather industry. A study is conducted into this work to prepare a polymerized electrolytic solution (PES) from chrome-containing leather waste (CCLW) for carbonized particles (CP), microfibrillated cellulose (MCF), and polyethylene glycol (PEG) for their potential use in sustainable energy production. In this method consuming power (rechargeable) is based on the redox process. Field emission-scanning electron microscopy (FE-SEM), Energy-dispersive X-ray spectroscopy (EDX), and Fourier-transform infrared spectroscopy (FTIR) were used to investigate the physical and chemical features of PES. On PES, energy generation was demonstrated using a multimeter and rheological properties. The results show that energy was produced with a voltage of 1101.12 ± 1.00 mV per cell, a current of 639.12 ± 0.42 mA per cell, and a resistance of 88.77 ± 0.17 per cell. Rheological tests were conducted at 25 °C with 8% wt/vol of PES and gradually increased shear-strain rates of 0.01 to 100 s−1. This work presents the environmental results of a study effort on the comparative examination of solutions for material and energy recovery from waste, along with those derived from mass and energy balances.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42613394","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}
Global production and usage of plastics have skyrocket to 368 million tons in 2019, resulting in increasing amounts of plastic waste concentrating in our natural and urban ecosystems (especially rivers and oceans), via landfill, incineration, or illegal disposal. As highlighted herein, due to the production and degradation of larger plastics, micro and nano plastics are introduced to these ecosystems, causing detrimental impact to plants and animals, including humans, through accumulation in living systems. Though toxicity or health impact are not clearly established, long term accumulation of microplastics in living systems can lead to impact on health of such systems. Critically, this review explores state-of-the art physical, chemical, and biological methods to remove and destroy new and legacy microplastics in aquatic ecosystems (natural and urban). Currently, there are no standardised, accepted, and cost-effective methods for complete removal of microplastics from these aquatic ecosystems. Gaps in knowledge and recommendations for future research to help inform practice and legislation are highlighted. A key consideration highlighted through the review is that microplastics cycle through ecosystems – natural and engineered, these do not operate in siloes and waste from treatment processes could be a conduit for (unintended) recontamination of microplastics. Hence there is a need to take a whole systems approach when developing innovative removal or destructive solutions and, ultimately, reducing plastic use remains the best option to best safeguard future environmental and public health.
{"title":"Microplastics in aquatic environments – a review of recent advances","authors":"K. Fish, Laura Clarizia, J. Meegoda","doi":"10.1680/jenes.23.00018","DOIUrl":"https://doi.org/10.1680/jenes.23.00018","url":null,"abstract":"Global production and usage of plastics have skyrocket to 368 million tons in 2019, resulting in increasing amounts of plastic waste concentrating in our natural and urban ecosystems (especially rivers and oceans), via landfill, incineration, or illegal disposal. As highlighted herein, due to the production and degradation of larger plastics, micro and nano plastics are introduced to these ecosystems, causing detrimental impact to plants and animals, including humans, through accumulation in living systems. Though toxicity or health impact are not clearly established, long term accumulation of microplastics in living systems can lead to impact on health of such systems. Critically, this review explores state-of-the art physical, chemical, and biological methods to remove and destroy new and legacy microplastics in aquatic ecosystems (natural and urban). Currently, there are no standardised, accepted, and cost-effective methods for complete removal of microplastics from these aquatic ecosystems. Gaps in knowledge and recommendations for future research to help inform practice and legislation are highlighted. A key consideration highlighted through the review is that microplastics cycle through ecosystems – natural and engineered, these do not operate in siloes and waste from treatment processes could be a conduit for (unintended) recontamination of microplastics. Hence there is a need to take a whole systems approach when developing innovative removal or destructive solutions and, ultimately, reducing plastic use remains the best option to best safeguard future environmental and public health.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44894862","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}
P. Tiwari, Maya Verma, Ambika, H. Chutani, Pradeep Pratap Singh, Saraswati Kanodia, Tanushree Verma
Water is an essential component of life. Only 2.5% of the total percentage of water available on Earth is fresh. As the World’s population is increasing, water pollution is becoming more complex and difficult to remove. Due to change in climatic conditions globally, many regions of the World is facing multiple challenges in sustainable supply of water and its magnitude is rapidly increasing. Therefore, reuse of waste water is becoming a common necessity. However, due to the presence of water contaminants, such as heavy metals, organic pollutants, and many other complex compounds, treatment of contaminated waste water is essential for a healthy life. Nanotechnology offers opportunities to provide efficient, cost-effective, and environmentally sustainable solutions for supplying potable water for human use and clean water for agricultural and industrial uses. Photocatalytic processes have shown a great potential as a low-cost, environmentally friendly and sustainable treatment technology for water purification. Photocatalytic degradation has been used efficiently for the degradation and removal of toxic and harmful chemicals to improve water quality. Titanium based semiconductor have been employed as photocatalysts in degradation of organic molecules. In the present review, titanium dioxide based nanoparticles and their applications in water remediation.
{"title":"Titanium dioxide based nanoparticles and their applications in water remediation","authors":"P. Tiwari, Maya Verma, Ambika, H. Chutani, Pradeep Pratap Singh, Saraswati Kanodia, Tanushree Verma","doi":"10.1680/jenes.22.00095","DOIUrl":"https://doi.org/10.1680/jenes.22.00095","url":null,"abstract":"Water is an essential component of life. Only 2.5% of the total percentage of water available on Earth is fresh. As the World’s population is increasing, water pollution is becoming more complex and difficult to remove. Due to change in climatic conditions globally, many regions of the World is facing multiple challenges in sustainable supply of water and its magnitude is rapidly increasing. Therefore, reuse of waste water is becoming a common necessity. However, due to the presence of water contaminants, such as heavy metals, organic pollutants, and many other complex compounds, treatment of contaminated waste water is essential for a healthy life. Nanotechnology offers opportunities to provide efficient, cost-effective, and environmentally sustainable solutions for supplying potable water for human use and clean water for agricultural and industrial uses. Photocatalytic processes have shown a great potential as a low-cost, environmentally friendly and sustainable treatment technology for water purification. Photocatalytic degradation has been used efficiently for the degradation and removal of toxic and harmful chemicals to improve water quality. Titanium based semiconductor have been employed as photocatalysts in degradation of organic molecules. In the present review, titanium dioxide based nanoparticles and their applications in water remediation.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48298982","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}
Within this paper the authors are aiming to assess the air quality within Bucharest city, Romania’s capital, during the COVID-19 pandemic. It is well established that, for a quite long period Bucharest was amongst the worst Romanian cities in terms of air quality. Thus, within this paper the investigation of the effects of imposed quarantine and lockdown in terms air pollution is carried out. The levels of the main air pollutants as: particulate matter (PM2.5 and PM10), Nitrogen dioxide (NO2) and Benzene (C6H6) were recorded within the period: Jan. 2020 – Apr. 2022 by using 6 stationary monitoring stations (B-1, B-2, B-3, B-4, B-5 and B-6) belonging to Romanian National Network for Monitoring Air Quality (RNMCA). During the lockdown period (16. Mar. – 14. May. 2020), the measurements indicate significant reductions only for PM2.5, NO2 and C6H6, while for PM10 due to the fact that a sandstorm appeared, the results are unreliable. The results focus on the B-3 and B-6 traffic monitoring stations because road traffic is one of the main sources of pollution in cities. Compared with 2018-2019 period, during the lockdown all the air pollutants from all the measuring stations dramatically dropped highlighting thus the important role of the traffic and its significant contribution to air quality depreciation in Bucharest, especially in terms of NO2 pollution. Therefore the urgent need for decisions to be made in terms of improving the air quality of the city in especially from road traffic perspective arose.
{"title":"The impact of COVID-19 on air quality in Bucharest","authors":"G. Cican, R. Mirea","doi":"10.1680/jenes.22.00086","DOIUrl":"https://doi.org/10.1680/jenes.22.00086","url":null,"abstract":"Within this paper the authors are aiming to assess the air quality within Bucharest city, Romania’s capital, during the COVID-19 pandemic. It is well established that, for a quite long period Bucharest was amongst the worst Romanian cities in terms of air quality. Thus, within this paper the investigation of the effects of imposed quarantine and lockdown in terms air pollution is carried out. The levels of the main air pollutants as: particulate matter (PM2.5 and PM10), Nitrogen dioxide (NO2) and Benzene (C6H6) were recorded within the period: Jan. 2020 – Apr. 2022 by using 6 stationary monitoring stations (B-1, B-2, B-3, B-4, B-5 and B-6) belonging to Romanian National Network for Monitoring Air Quality (RNMCA). During the lockdown period (16. Mar. – 14. May. 2020), the measurements indicate significant reductions only for PM2.5, NO2 and C6H6, while for PM10 due to the fact that a sandstorm appeared, the results are unreliable. The results focus on the B-3 and B-6 traffic monitoring stations because road traffic is one of the main sources of pollution in cities. Compared with 2018-2019 period, during the lockdown all the air pollutants from all the measuring stations dramatically dropped highlighting thus the important role of the traffic and its significant contribution to air quality depreciation in Bucharest, especially in terms of NO2 pollution. Therefore the urgent need for decisions to be made in terms of improving the air quality of the city in especially from road traffic perspective arose.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47210412","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}
Water, a vital component required for all living things, becomes more and more polluted as a result of globalization and industrialization. Currently, pathogenic microbes, emerging pollutants, industrial chemicals, and waste are polluting all-natural water resources, and transportation systems. Therefore, before usage, drinking water has to be treated. When water disinfectants react with the organic natural components found in source waters, they may unintentionally produce disinfection by-products (DBPs), which have a negative impact on the biological system. There is a need for the development of innovative water treatment solutions since traditional drinking water treatment (DWT) doesn’t reduce emerging contaminants. This study’s main objective is to give an overview of disinfection techniques, DBP generation, health consequences, and environmental repercussions. Additionally, there are advancements in nanotechnology that have been made in drinking water system treatment for the prevention of DBP and contaminant removal. Further review describes the analysis of advanced DWT processes that could be employed for the removal and control of precursors and DBPs.
{"title":"Advanced drinking water treatment: Current status and future prospects of nano-techniques for disinfectant by-product prevention","authors":"Jayanthi V, S. Subramanian","doi":"10.1680/jenes.23.00043","DOIUrl":"https://doi.org/10.1680/jenes.23.00043","url":null,"abstract":"Water, a vital component required for all living things, becomes more and more polluted as a result of globalization and industrialization. Currently, pathogenic microbes, emerging pollutants, industrial chemicals, and waste are polluting all-natural water resources, and transportation systems. Therefore, before usage, drinking water has to be treated. When water disinfectants react with the organic natural components found in source waters, they may unintentionally produce disinfection by-products (DBPs), which have a negative impact on the biological system. There is a need for the development of innovative water treatment solutions since traditional drinking water treatment (DWT) doesn’t reduce emerging contaminants. This study’s main objective is to give an overview of disinfection techniques, DBP generation, health consequences, and environmental repercussions. Additionally, there are advancements in nanotechnology that have been made in drinking water system treatment for the prevention of DBP and contaminant removal. Further review describes the analysis of advanced DWT processes that could be employed for the removal and control of precursors and DBPs.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44951507","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}
Water crisis is priority of this work and dire need to develop eco-friendly and self-sustainable unit. The current study analyses the economic and enviroeconomic of an N-identical (N-PVTCPC) collectors double slope solar desalination units (DS-DU) with a heat exchanger (HE) using water based Al2O3 nanoparticles. An analytical study in which a program was fed into MATLAB, and the analysis was monitored on an annual basis New Delhi India. The Indian Metrological Department in Pune, India provided the input data necessary for the mathematical procedure. From the solar energy for the year-round, yield and energy production will be calculated. The system’s economic, environmental, and energy-related performance has been assessed, and it will be compared to previous systems. Additionally, based on annual and life span for 15, 20, and 30 years, it is discovered that there is an 8.5% greater yield, 7.31% greater annual energy, 3.9% and 2.85% less CO2 mitigation/ton energy, and 5.17 % greater annual productivity, carbon credit respectively. Based on energy, environmental, and economic factors, it will be determined that the suggested system is superior to alternative systems.
{"title":"Enviroeconomic analysis of hybrid active solar desalination system using nanoparticles","authors":"Dharamveer Si̇ngh, Satyaveer Singh, Aakersh Chauhan, Ajay Kumar","doi":"10.1680/jenes.23.00045","DOIUrl":"https://doi.org/10.1680/jenes.23.00045","url":null,"abstract":"Water crisis is priority of this work and dire need to develop eco-friendly and self-sustainable unit. The current study analyses the economic and enviroeconomic of an N-identical (N-PVTCPC) collectors double slope solar desalination units (DS-DU) with a heat exchanger (HE) using water based Al2O3 nanoparticles. An analytical study in which a program was fed into MATLAB, and the analysis was monitored on an annual basis New Delhi India. The Indian Metrological Department in Pune, India provided the input data necessary for the mathematical procedure. From the solar energy for the year-round, yield and energy production will be calculated. The system’s economic, environmental, and energy-related performance has been assessed, and it will be compared to previous systems. Additionally, based on annual and life span for 15, 20, and 30 years, it is discovered that there is an 8.5% greater yield, 7.31% greater annual energy, 3.9% and 2.85% less CO2 mitigation/ton energy, and 5.17 % greater annual productivity, carbon credit respectively. Based on energy, environmental, and economic factors, it will be determined that the suggested system is superior to alternative systems.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46723286","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}
Kutalmis Gokkus, S. B. Sengel, Y. Yıldırım, Soner Hasanbeyoglu, Vural Butun
Dyes are one of the most common pollutants in wastewater due to their widespread use. Therefore, in order to protect aquatic ecosystems, dyes must be treated in situ and/or in vivo. In this study, we synthesized poly (glycidyl methacrylate) (PGMA) gels and then modified with diethylenetriamine (DETA) and tetraethylenepentamine (TEPA) containing different numbers and lengths amino groups to obtain PGMA-NH2 hydrogels and used in CR adsorption. The adsorption studies were carried out according to batch adsorption procedure. As a result of the study, the contact time was found 40 minutes and the highest adsorption capacity of 196 and 147 mg/g for PGMA-DETA and PGMA-TEPA was reached, respectively. Isotherm and kinetic experiments showed that adsorption obeys the Freundlich isotherm and pseudo-second-order equation. CR dye is an anionic indicator dye. These results showed that PGMA-NH2 hydrogels have significant potential for efficient adsorption of anionic dyes.
{"title":"Amine functionalized poly (glycidyl methacrylate) hydrogels for Congo red adsorption","authors":"Kutalmis Gokkus, S. B. Sengel, Y. Yıldırım, Soner Hasanbeyoglu, Vural Butun","doi":"10.1680/jenes.23.00025","DOIUrl":"https://doi.org/10.1680/jenes.23.00025","url":null,"abstract":"Dyes are one of the most common pollutants in wastewater due to their widespread use. Therefore, in order to protect aquatic ecosystems, dyes must be treated in situ and/or in vivo. In this study, we synthesized poly (glycidyl methacrylate) (PGMA) gels and then modified with diethylenetriamine (DETA) and tetraethylenepentamine (TEPA) containing different numbers and lengths amino groups to obtain PGMA-NH2 hydrogels and used in CR adsorption. The adsorption studies were carried out according to batch adsorption procedure. As a result of the study, the contact time was found 40 minutes and the highest adsorption capacity of 196 and 147 mg/g for PGMA-DETA and PGMA-TEPA was reached, respectively. Isotherm and kinetic experiments showed that adsorption obeys the Freundlich isotherm and pseudo-second-order equation. CR dye is an anionic indicator dye. These results showed that PGMA-NH2 hydrogels have significant potential for efficient adsorption of anionic dyes.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47340365","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}
Bo Zhang, Fang Li, Meng Zhang, Zhenzi Yu, Xinyi Wang
In order to reduce the negative impact of mine water gushing on the environment, it is necessary to evaluate the water quality. Taking the Pingdingshan coalfield as the research object, six components including chroma, turbidity, total dissolved solids, total hardness, Cl−, SO4 2− were selected as index factors. Composite weight is calculated by variable weight theory, and the water quality of mine gushing water is evaluated by matter element extension model, fuzzy variable set model, ayesian theory, nemerow index. The deviation of four evaluation methods is calculated based on the specially constructed mathematical model. The research results show that the order of the deviation of the evaluation method from small to large is: fuzzy variable set method (5.5) < matter-element extension method (8) < bayesian statistical method (10) < nemerow index method (17). Fuzzy variable set method is more suitable for Pingdingshan coalfield Mine gushing water quality assessment. We hope this research can provide a certain reference value for the evaluation of mine water quality in the future.
{"title":"Selection of water quality evaluation method of mine water inflow based on multiple methods","authors":"Bo Zhang, Fang Li, Meng Zhang, Zhenzi Yu, Xinyi Wang","doi":"10.1680/jenes.23.00036","DOIUrl":"https://doi.org/10.1680/jenes.23.00036","url":null,"abstract":"In order to reduce the negative impact of mine water gushing on the environment, it is necessary to evaluate the water quality. Taking the Pingdingshan coalfield as the research object, six components including chroma, turbidity, total dissolved solids, total hardness, Cl−, SO4 2− were selected as index factors. Composite weight is calculated by variable weight theory, and the water quality of mine gushing water is evaluated by matter element extension model, fuzzy variable set model, ayesian theory, nemerow index. The deviation of four evaluation methods is calculated based on the specially constructed mathematical model. The research results show that the order of the deviation of the evaluation method from small to large is: fuzzy variable set method (5.5) < matter-element extension method (8) < bayesian statistical method (10) < nemerow index method (17). Fuzzy variable set method is more suitable for Pingdingshan coalfield Mine gushing water quality assessment. We hope this research can provide a certain reference value for the evaluation of mine water quality in the future.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41599313","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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