Chemical Engineering (Engineering) eJournal最新文献

Deep Eutectic Solvent Assisted Facile and Efficient Synthesis of Nitrogen-Doped Magnetic Biochar for Hexavalent Chromium Elimination: Mechanism and Performance Insights 深共晶溶剂辅助快速高效合成氮掺杂磁性生物炭去除六价铬:机理和性能观察

Chemical Engineering (Engineering) eJournal Pub Date : 2022-07-01 DOI: 10.2139/ssrn.3934300

Zhi-Hai Ke, Meng Mei, Jingxin Liu, Peiyu Du, Bin Zhang, Teng Wang, Si Chen, Jinping Li

{"title":"Deep Eutectic Solvent Assisted Facile and Efficient Synthesis of Nitrogen-Doped Magnetic Biochar for Hexavalent Chromium Elimination: Mechanism and Performance Insights","authors":"Zhi-Hai Ke, Meng Mei, Jingxin Liu, Peiyu Du, Bin Zhang, Teng Wang, Si Chen, Jinping Li","doi":"10.2139/ssrn.3934300","DOIUrl":"https://doi.org/10.2139/ssrn.3934300","url":null,"abstract":"Dual-modification of biochar through magnetization and nitrogen-doping greatly enhances the removal performance for Cr(VI). In this study, a novel green deep eutectic solvent (DES) produced by complexing of FeCl 3 and urea was adopted for the first time to assist the facile and efficient preparation of nitrogen-doped magnetic biochar (NMBC) by using peanut shell (PS) as raw stock. The results indicated that FeCl 3 /urea-based DES could act as fine iron and nitrogen sources in the formation of NMBC, and moreover, catalyzed the pyrolysis process and promoted the pore development. The synthesized NMBC could capture Cr(VI) by both physisorption and chemisorption, including pore-filling, electrostatic attraction, ion-exchange, reduction and surface complexation, with removal capacity for Cr(VI) outperforming that of many other reported materials. The present study provides a new idea for the facile and efficient magnetization as well as nitrogen-doping decoration of biochar for Cr(VI) decontamination from water.","PeriodicalId":9858,"journal":{"name":"Chemical Engineering (Engineering) eJournal","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81787204","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: 15

Computational Simulation of Ionization Processes in Single-Bubble and Multi-Bubble Sonoluminescence 单泡和多泡声致发光电离过程的计算模拟

Chemical Engineering (Engineering) eJournal Pub Date : 2022-04-14 DOI: 10.2139/ssrn.3904623

Jinfu Liang, Weizhong Chen, Yu An

{"title":"Computational Simulation of Ionization Processes in Single-Bubble and Multi-Bubble Sonoluminescence","authors":"Jinfu Liang, Weizhong Chen, Yu An","doi":"10.2139/ssrn.3904623","DOIUrl":"https://doi.org/10.2139/ssrn.3904623","url":null,"abstract":"\u0000 The most recent spectroscopic studies of moving-single bubble sonoluminescence (MSBSL) and multi-bubble sonoluminescence (MBSL) have revealed that hydrated electrons (e$_{texttt{aq}}^{-}$) are generated in MSBSL but absent in MBSL. To explore the mechanism this phenomenon, we numerically simulated the ionization processes in single- and multi-bubble sonoluminescence in aqueous solution of terbium chloride (TbCl$_{3}$). The results show that the maximum degree of ionization of single-bubble sonoluminescence (SBSL) is approximately 10000 times greater than that of MBSL under certain special physical parameters. The hydrated electrons (e$_{texttt{aq}}^{-}$) formed in SBSL are far greater than those in MBSL provided these electrons are ejected from a bubble into a liquid. Therefore, the quenching of e$_{texttt{aq}}^{-}$ to SBSL spectrum is stronger than that of the MBSL spectrum. This may be the reason that the trivalent terbium [Tb(III)] ion line intensities from SBSL in the TbCl$_{3}$ aqueous solutions with the acceptor of e$_{texttt{aq}}^{-}$ are stronger than those of TbCl$_{3}$ aqueous solutions without the acceptor of e$_{texttt{aq}}^{-}$, whereas the Tb(III) ion line intensities from MBSL are not variational, which is significant for exploring the mechanism behind the cavitation and sonoluminescence.","PeriodicalId":9858,"journal":{"name":"Chemical Engineering (Engineering) eJournal","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80350327","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

Microbubbles for Effective Cleaning of Metal Surfaces Without Chemical Agents 无化学试剂有效清洗金属表面的微气泡

Chemical Engineering (Engineering) eJournal Pub Date : 2022-01-05 DOI: 10.2139/ssrn.3914052

Pan Li, Jiahao Wang, Zheng-Wei Liao, Y. Ueda, K. Yoshikawa, Guoxing Zhang

{"title":"Microbubbles for Effective Cleaning of Metal Surfaces Without Chemical Agents","authors":"Pan Li, Jiahao Wang, Zheng-Wei Liao, Y. Ueda, K. Yoshikawa, Guoxing Zhang","doi":"10.2139/ssrn.3914052","DOIUrl":"https://doi.org/10.2139/ssrn.3914052","url":null,"abstract":"Traditional cleaning methods involving surfactants and ultrasound generate large amounts of wastewater. Microbubbles offer a more eco-friendly technology for interface cleaning. Here, we explored the efficiency of microbubbles for cleaning oil from metal surfaces. Air microbubbles at concentrations as high as 106 particles/mL were generated by hydrodynamic cavitation. Under optimal conditions, cleaning efficiencies for the removal of oil from carbon-steel and stainless-steel surfaces were 78.5 and 49.8% after 15 min, respectively, compared to only 6.5 and 9.9% without microbubbles. Additionally, combining microbubble treatment with the ultrasonic method achieved a higher efficiency than ultrasonic cleaning alone, achieving an efficiency of 85.5% after 3 min compared to 69.0%. The mechanism of microbubble cleaning was determined using a fluorescence observation system, and a model was established to describe the cleaning process. The use of microbubbles produced less emulsified oil wastewater because the oil that attaches to the microbubble surface floats with the bubbles to the surface of the cleaning water, where it can be removed, allowing for water recycling. This novel microbubble cleaning technology, which both enhances cleaning efficiency and reduces wastewater production, represents a viable and eco-friendly option for degreasing processes.","PeriodicalId":9858,"journal":{"name":"Chemical Engineering (Engineering) eJournal","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79653708","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: 18

Unprecedented Age-Hardening and its Structural Requirement in a Severely Deformed Al-Cu-Mg Alloy 严重变形Al-Cu-Mg合金的时效硬化及其组织要求

Chemical Engineering (Engineering) eJournal Pub Date : 2022-01-01 DOI: 10.2139/ssrn.3910595

Ran Yang, Z. Feng, Tianlin Huang, Guilin Wu, A. Godfrey, Xiaoxu Huang

引用次数: 5

Elucidating the Interaction of Enantiomeric Cu(Ii) Complexes with DNA, Rna and Hsa: A Comparative Study 对映体Cu(Ii)配合物与DNA、Rna和Hsa相互作用的比较研究

Chemical Engineering (Engineering) eJournal Pub Date : 2021-12-01 DOI: 10.2139/ssrn.3898509

S. Parveen, Saman Jafri, H. Khan, S. Tabassum, F. Arjmand

{"title":"Elucidating the Interaction of Enantiomeric Cu(Ii) Complexes with DNA, Rna and Hsa: A Comparative Study","authors":"S. Parveen, Saman Jafri, H. Khan, S. Tabassum, F. Arjmand","doi":"10.2139/ssrn.3898509","DOIUrl":"https://doi.org/10.2139/ssrn.3898509","url":null,"abstract":"To find out the potential of enantiomeric copper complexes (1S and 1R) as therapeutics, interactions studies with three different biomacromolecules (CT-DNA, tRNA and HSA) were carried out by employing various biophysical viz; absorption, fluorescence, circular dichroism, morphological and computational studies. The results revealed an efficient association of complexes 1S and 1R with CT-DNA, tRNA and HSA essentially sustained by non-covalent interactions which were evidenced from Kb and Ksv values. The binding constant values revealed 10-fold greater binding affinity of complexes with tRNA and HSA as compared to CT-DNA; the binding affinity was found in the order tRNA > HSA > CT-DNA. S-enantiomeric complex 1S exhibited higher binding propensity over its R-analog 1R with all three macromolecules. In silico molecular modeling and Hirshfeld studies corroborated well with the spectroscopic results and validated the interaction of complexes 1S and 1R with the biomolecules via hydrogen bonds, hydrophobic and van der Waal interactions. The results revealed that S-enantiomeric complex 1S is a more avid binder towards all three biological targets and holds a great potential to act as a promising stereospecific chemotherapeutic agent.","PeriodicalId":9858,"journal":{"name":"Chemical Engineering (Engineering) eJournal","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85838304","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: 5

Electrocatalytic Activity of Schiff Base Containing Copper Phthalocyanines Towards the Detection of Catechol: Effect of Heteroatoms and Asymmetry 含铜酞菁席夫碱对邻苯二酚检测的电催化活性:杂原子和不对称的影响

Chemical Engineering (Engineering) eJournal Pub Date : 2021-12-01 DOI: 10.2139/ssrn.3869541

Nobuhle Ndebele, P. Şen, T. Nyokong

引用次数: 8

Characterization of Ti-48al-2cr-2nb Built by Selective Laser Melting 选择性激光熔化制备Ti-48al-2cr-2nb的表征

Chemical Engineering (Engineering) eJournal Pub Date : 2021-10-01 DOI: 10.2139/ssrn.3844698

Kazuhiro Mizuta, Yutaka Hijikata, T. Fujii, Kazuhiro Gokan, K. Kakehi

引用次数: 12

A Comparison of Direct Concentrating Solar Thermal Treatment of Manganese Ores to Fossil Fuel Based Thermal Treatments 锰矿石直接集中太阳能热处理与化石燃料热处理的比较

Chemical Engineering (Engineering) eJournal Pub Date : 2021-09-12 DOI: 10.2139/ssrn.3926254

L. Hockaday, Q. Reynolds, C. McGregor, F. Dinter

{"title":"A Comparison of Direct Concentrating Solar Thermal Treatment of Manganese Ores to Fossil Fuel Based Thermal Treatments","authors":"L. Hockaday, Q. Reynolds, C. McGregor, F. Dinter","doi":"10.2139/ssrn.3926254","DOIUrl":"https://doi.org/10.2139/ssrn.3926254","url":null,"abstract":"In South Africa, the world’s largest land-based manganese reserves occur in an area coincident with high annual solar irradiance. The use of direct concentrating solar thermal treatment, as opposed to fossil fuel based thermal treatment, reduces the CO2 emissions associated with thermal treatment of manganese ores greatly and could open new processing opportunities when scaled up. The application of direct concentrating solar thermal treatment of manganese ores is compared to other thermal treatment methods. The evaluation is based on the results of exploratory on-sun experiments conducted in 2019. Pellets prepared from manganese ores, bentonite binder and charcoal were treated with concentrating solar radiation. The solar treated samples were analyzed to determine changes to their mineralogy with X-ray diffraction and scanning electron microscopy. In addition, the solar treated pellets were tested to determine their compressive strength. The pellets did not pass the strength requirement of 500 N/pellet to qualify as feed for submerged arc furnaces. Results from these experiments were then further compared with other thermal treatments of manganese ores such as calcination, nodulizing, pelletizing, sintering and reductive roasting to evaluate the feasibility of applying concentrating solar thermal treatment in these treatment options. The direct concentrating solar thermal treatment was found to strengthen manganese pellets sufficiently to be considered dried and preheated for pelletizing but not cured. Temperatures were achieved suitable for calcination or reductive roasting of manganese ores, where agglomeration is not required.","PeriodicalId":9858,"journal":{"name":"Chemical Engineering (Engineering) eJournal","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90210353","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

Particle Size Distributions of Airborne Particulate Matter in a Ferrosilicon Smelter 硅铁冶炼厂空气悬浮颗粒物的粒径分布

Chemical Engineering (Engineering) eJournal Pub Date : 2021-09-12 DOI: 10.2139/ssrn.3927700

I. Kero, A. Blom, R. B. Jørgensen

{"title":"Particle Size Distributions of Airborne Particulate Matter in a Ferrosilicon Smelter","authors":"I. Kero, A. Blom, R. B. Jørgensen","doi":"10.2139/ssrn.3927700","DOIUrl":"https://doi.org/10.2139/ssrn.3927700","url":null,"abstract":"Dust and fume emissions are a prominent issue in the ferroalloy industry and relevant to both indoor air quality, occupational exposure and outdoor air quality and other environmental effects. Exposure assessment with respect to respirable particles and “total dust” have been demanded from the authorities for years. Recently the focus has widened and exposure assessment focusing on ultrafine particles is in demand. In this study, ultrafine particles are studied in a ferrosilicon smelter. In order to understand the prevalence of ultrafine particles in the workplace environment, five different locations in the production hall were selected and the number concentration and the particle size distributions were investigated by use of stationary instruments. The worker attendance at each location was logged, so that the exposure at each location could be evaluated in accordance to attendance time. Number concentrations for the time periods where workers were present could be calculated. The locations selected were: tapping area, casting area, ladle transport corridor, control room and electrode-weld-on”. The measurement equipment used was a Nanoscan SMPS from TSI, measuring the particle size range 10-420 nm. The dominating size in the tapping areas is 205.4 nm for both furnaces and one SAF has an additional peak is at 11.5-15.4 nm. In the ladle transport area, the dominating particle sizes are 15.4 nm, 27.4 nm and 154 nm. The casting area has a bimodal size distribution and the two peaks are at 15,4 nm and 154 nm. The electrode welding area is very different from the other areas investigated here. The concentrations are significantly higher and the dominating size is 205.4 nm, but with substantial increased contributions in the range 86-365 nm. This paper discusses the findings and explores possible explanations behind the particle size distributions with support in the literature. Different dust and fume sources present in a smelter are discussed.","PeriodicalId":9858,"journal":{"name":"Chemical Engineering (Engineering) eJournal","volume":"144 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84836817","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

Improvement of the Process of Conducting Arc-Free Ferronickel Melting in a Six-Electrode Furnace 六极炉无弧镍铁熔炼工艺的改进

Chemical Engineering (Engineering) eJournal Pub Date : 2021-09-12 DOI: 10.2139/ssrn.3929902

A. Bezugliy, A. Nikolenko, D. Shevchenko, A. N. Ovcharuk, V Iu Kuvaev, V A Bezugliy, O V Zamkovoy

引用次数: 0