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EngRN: Environmental Chemical Engineering (Topic)最新文献

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Evaluating the Efficacy of Ambient Air Quality Standards at Coal-Fired Power Plants 评价燃煤电厂环境空气质量标准的效果
EngRN: Environmental Chemical Engineering (Topic) Pub Date : 2019-09-25 DOI: 10.2139/ssrn.3335401
Zach Raff, Jason M. Walter
{"title":"Evaluating the Efficacy of Ambient Air Quality Standards at Coal-Fired Power Plants","authors":"Zach Raff, Jason M. Walter","doi":"10.2139/ssrn.3335401","DOIUrl":"https://doi.org/10.2139/ssrn.3335401","url":null,"abstract":"The Clean Air Act's National Ambient Air Quality Standards (NAAQS) set limits on ambient air concentrations of hazardous pollutants. Since its creation, NAAQS guidelines have evolved to curb ambient concentrations of Particulate Matter less than 2.5 ug in diameter (PM2.5), which have been linked to respiratory and heart problems. However, the last adjustment to all (annual mean and 24-hour) PM2.5 standards occurred in 1997. This study evaluates the health benefits of tighter standards via reduced coal-fired power plant emissions of sulfur dioxide (SO2) and nitrous oxide (NOx), primary precursors to ambient PM2.5 concentrations. We find that reducing current annual and 24-hour PM2.5 standards would result in nationwide health benefits of at least $970 million in the year following enactment. We further find that the proposed standards are net benefit positive when incorporating abatement costs.","PeriodicalId":110628,"journal":{"name":"EngRN: Environmental Chemical Engineering (Topic)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123488956","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}
引用次数: 0
Comparative Study and Development of Disease Prediction System for Indian Crops 印度作物病害预测系统的比较研究与开发
EngRN: Environmental Chemical Engineering (Topic) Pub Date : 2019-03-11 DOI: 10.2139/ssrn.3350329
B. Gorad, D. S. Kotrappa
{"title":"Comparative Study and Development of Disease Prediction System for Indian Crops","authors":"B. Gorad, D. S. Kotrappa","doi":"10.2139/ssrn.3350329","DOIUrl":"https://doi.org/10.2139/ssrn.3350329","url":null,"abstract":"Current Agriculture faces many challenges such as climate change, environmental pollution, Infection of various diseases on plants, water shortages and increased societal demand of food production and many more. Many farmers in India commit suicide because of these challenges. Disease Prediction System for Brinjal crop using machine learning is the promising solution, which is based on predicting and responding to disease symptoms variations on Indian Brinjal plant.","PeriodicalId":110628,"journal":{"name":"EngRN: Environmental Chemical Engineering (Topic)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129987532","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}
引用次数: 1
Batch Studies for Methylene Blue Removal and Recovery by Untreated Coffee Residues 未处理咖啡渣去除和回收亚甲基蓝的批量研究
EngRN: Environmental Chemical Engineering (Topic) Pub Date : 2017-10-01 DOI: 10.17265/2162-5298/2017.10.001
O. Kopsidas
{"title":"Batch Studies for Methylene Blue Removal and Recovery by Untreated Coffee Residues","authors":"O. Kopsidas","doi":"10.17265/2162-5298/2017.10.001","DOIUrl":"https://doi.org/10.17265/2162-5298/2017.10.001","url":null,"abstract":"This paper reports the practicability of using coffee residues to remove widely used basic dyes like MB (Methylene Blue) from wastewaters. The effect of different batch system parameters, namely stirring speed, pH, initial dye concentration and contact time were studied. Moreover, in continuous fixed-bed column systems, the effects of parameters such as bed-depth, flow rate and initial dye concentration were examined. The experimental batch systems data were simulated using (a) Freundlich, Langmuir and Sips isotherm models and (b) 1st order, 2nd order, and intra-particle kinetic models. The results revealed that the MB is fairly adsorbed on coffee residues. This process could be a low cost technique for the removal of basic dyes from aqueous systems.","PeriodicalId":110628,"journal":{"name":"EngRN: Environmental Chemical Engineering (Topic)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126586074","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}
引用次数: 6
Photo-Assisted Sequential Assembling of Uniform Metal Clusters With Sub-Nanometers on Semiconductor Supports 半导体支架上亚纳米均匀金属团簇的光辅助顺序组装
EngRN: Environmental Chemical Engineering (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3904346
Haocheng Wu, Wentao Jiang, Liyi Shi, Rengui Li, Lei Huang, Can Li
{"title":"Photo-Assisted Sequential Assembling of Uniform Metal Clusters With Sub-Nanometers on Semiconductor Supports","authors":"Haocheng Wu, Wentao Jiang, Liyi Shi, Rengui Li, Lei Huang, Can Li","doi":"10.2139/ssrn.3904346","DOIUrl":"https://doi.org/10.2139/ssrn.3904346","url":null,"abstract":"Dispersing metal subnano-clusters on the oxide supports is attracting close attention in heterogeneous catalysis, but great challenges still lie in controlling the size and dispersion of subnano-clusters due to the inevitable agglomeration. Here, we propose a sequential photochemical deposition strategy named “first store, and then release” to uniformly fabricate the size-controlling noble metal subnano-clusters on semiconductor oxides. Using the typical semiconductor TiO2, the photoexcited electrons can be first stored as reduced species (e.g. Ti3+) under irradiation and the Ti3+ species can optimize both the nucleation and growth processes in dark reaction, resulting in a uniform dispersing of various noble metals (Au, Pt, Ag etc.) with size diameters of ~1 nm. The subnano-clusters catalysts exhibited superior performance in catalytic oxidation of HCHO compared with that of nanoparticles. This work brings a new and useful strategy to construct size-controlling noble metals on the oxide supports for heterogeneous catalysis and the related fields.","PeriodicalId":110628,"journal":{"name":"EngRN: Environmental Chemical Engineering (Topic)","volume":"40 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128500780","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}
引用次数: 0
Quantitative Volatile Organic Compound (VOC) Sensing with Liquid Crystal Core Fibers 定量挥发性有机化合物(VOC)传感与液晶芯纤维
EngRN: Environmental Chemical Engineering (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3844740
Katrin Schelski, Catherine G. Reyes, L. Pschyklenk, Peter-Michael Kaul, Jan P. F. Lagerwall
{"title":"Quantitative Volatile Organic Compound (VOC) Sensing with Liquid Crystal Core Fibers","authors":"Katrin Schelski, Catherine G. Reyes, L. Pschyklenk, Peter-Michael Kaul, Jan P. F. Lagerwall","doi":"10.2139/ssrn.3844740","DOIUrl":"https://doi.org/10.2139/ssrn.3844740","url":null,"abstract":"We present a quantitative assessment of the ability of liquid crystal (LC)-filled polymer fibers to sense volatile organic compounds (VOCs). By correlating the birefringence ∆n of two LCs with different nematic-isotropic transition temperatures T<sub>NI</sub> to the concentration c<sub>tol</sub> of toluene vapor in the atmosphere, we show that T<sub>NI</sub> is critical for the performance. The ∆n(c<sub>tol</sub>) response is fully reversible and quantitatively repeatable over several cycles. The response time is reduced from minutes to seconds by priming the fibers with a toluene pre-exposure. We propose that broad operating temperature range can be realized by combining fibers with different LC mixtures, yielding autonomous VOC sensors with textile form factor suitable for integration in apparel or in furniture that can compete with existing consumer grade electronic VOC sensors in terms of sensitivity and response speed, and outperform them in terms of selectivity.","PeriodicalId":110628,"journal":{"name":"EngRN: Environmental Chemical Engineering (Topic)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123463132","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}
引用次数: 0
Car Wash Water Treatment Using Eichhornia Crassipes 车用水处理
EngRN: Environmental Chemical Engineering (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3539928
B. Dash, J. Nanda
{"title":"Car Wash Water Treatment Using Eichhornia Crassipes","authors":"B. Dash, J. Nanda","doi":"10.2139/ssrn.3539928","DOIUrl":"https://doi.org/10.2139/ssrn.3539928","url":null,"abstract":"Eichhornia Crassipes or commonly known as Water Hyacinth can help in the process of Phytoremediation. The paper deals with the effectiveness of Eichhornia Crassipes in purifying car wash water. For conditioning the car wash water further, we can also use alum. As water hyacinth roots have capacity to control the turbidity as well as the roots can settle so many sediments and also can fix Nitrogen present in the water. Post treatment condition of car wash water observed to be an economy and ecology friendly process. Amalgamation of biological, physical and chemical treatment can give us best results. Here we focused only on biological treatment method to purify the car wash water and make it reuse for the same car wash process.","PeriodicalId":110628,"journal":{"name":"EngRN: Environmental Chemical Engineering (Topic)","volume":"57 34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122110430","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}
引用次数: 0
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