World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering最新文献

Electron-beam Initiated Polymerization of Elemental Phosphorus 电子束引发单质磷聚合

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-11-02 DOI: 10.37394/232031.2023.2.11

Tarasova N. P., Zanin A. A., Krivoborodov E. G.

引用次数: 0

Study Of Using Bentonite – Poly Ethylene Glycol Composite for Metal Removal from Water 膨润土-聚乙二醇复合材料去除水中金属的研究

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-10-05 DOI: 10.37394/232031.2023.2.10

Neama Ahmed Sobhy Ahmed

{"title":"Study Of Using Bentonite – Poly Ethylene Glycol Composite for Metal Removal from Water","authors":"Neama Ahmed Sobhy Ahmed","doi":"10.37394/232031.2023.2.10","DOIUrl":"https://doi.org/10.37394/232031.2023.2.10","url":null,"abstract":"Direct polymerization of polyethylene glycol (PEG) in suspensions of Bentonite (Ben) was used for preparation of Ben-PEG composite. The prepared composite was characterized using field-effect scanning electron microscopy, surface area measurements, and X-ray diffraction. In the XRD pattern there is a change in peak intensity. But New peaks appeared. This may be due to high dispersion of particles of polymer in the Ben matrix or low concentration of the modifying agent. The crystallinity absence after loading the sorbent with cadmium and lead ions in the SEM measurement indicates that there was no crystalline phase after sorption. The optimal conditions for adsorption of Cd2+ and Pb2+ ions were found to be a PEG content of 0.2 % and a contact time of 150 min. The sorption experiments were performed under different operating variables, including, pH, adsorbent dose and initial concentration of metals. For both Cd2+ and Pb2+, Adsorption parameters were determined using both Langmuir and Freundlich isotherms, but the experimental data were better fitted to the Langmuir equation than to Freundlich equation. The adsorption equilibrium was described by the Langmuir model, which confirmed the presence of saturated mono-layer of adsorbent molecules on the adsorbent surface, that the energy of adsorption is constant. The potential of Ben-PEG composite for the removal of cadmium and lead from aqueous solution was substantiated.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"16 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":"134975881","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

Effect of Oligomers and Polymers of Ethylene Glycols on Micellar Characteristics of Aqueous Solutions of Sodium Pentadectyl Sulfonate 乙二醇低聚物和聚合物对十五烷基磺酸钠水溶液胶束特性的影响

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-10-03 DOI: 10.37394/232031.2023.2.8

Vigen Barkhudaryan

{"title":"Effect of Oligomers and Polymers of Ethylene Glycols on Micellar Characteristics of Aqueous Solutions of Sodium Pentadectyl Sulfonate","authors":"Vigen Barkhudaryan","doi":"10.37394/232031.2023.2.8","DOIUrl":"https://doi.org/10.37394/232031.2023.2.8","url":null,"abstract":"The influence of oligomers and polymers of ethylene glycols with a different molecular mass on the structural transformations of aqueous solutions of surfactant, sodium pentadecylsulfonate, studied by viscometry and light scattering methods depending on their content in the system. It established that ethylene glycol with a molecular mass of 2,000 and 40,000 does not affect the structure of the system. For ethylene glycol with a molecular mass of 4,000, 6,000, and 20,000, a clearly expressed complex course of the dependence of the intrinsic viscosity of the micelle system on the polymer content was established. It assumed that with the changes in the concentration of ethylene glycols in the system, micelles are compacted due to a change in the balance of hydrophobic-hydrophilic interactions. In parallel with the change in apparent micelle masses and asymmetry coefficients determined by the light scattering method, the intrinsic viscosity also changes depending on the system's composition. The practical application of this research is that it allows the performance properties of sodium pentadecyl sulfonate (SPDS) to be adjusted, thereby expanding and improving its applications.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135695848","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

Captan: Problems Associated with its Identification in Environmental Materials and Food Products. Potential Solutions 队长:与环境材料和食品中其标识相关的问题。可能的解决方案

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-10-03 DOI: 10.37394/232031.2023.2.9

Nataliya Fedorova, Irina Bereznyak, Lydia Bondareva

{"title":"Captan: Problems Associated with its Identification in Environmental Materials and Food Products. Potential Solutions","authors":"Nataliya Fedorova, Irina Bereznyak, Lydia Bondareva","doi":"10.37394/232031.2023.2.9","DOIUrl":"https://doi.org/10.37394/232031.2023.2.9","url":null,"abstract":"The study is devoted to identifying the ways in which captan can affect humans, including through the atmosphere and through food. The objects of the research were the following: the active substance (captan), air and a vegetable, namely sweet pepper. The equipment used included a chromato-mass-spectrometer «Agilent 5977А» with a gas chromatograph «Agilent Technologies-7890В», a liquid chromatograph «Agilent 1260» with a diode array detector and a liquid chromato-mass-spectrometer ExionLCAD/Qtrap 6500+. The method of gasliquid chromatography did not provide reproducible results, due to an unstable connection. Using techniques developed for the identification of captan in air, captan was determined using real samples collected during agricultural work. Captan content was reliably measured using samples taken from the air of the working environment (0,2 – 0,75 mg·m-3) and from the skin of operational staff (0,2 – 0,4 mg, using·wipes-1). In determining captan content in fruit and vegetable products, new and detailed methodological approaches were developed in order to minimise the matrix effect: a calibration curve was created based on the control matrix sample. The detection limit for captan was established at 0,01 mg·kg-1. In the analysis of actual sweet pepper samples, captan content was found to be below the detection limit.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135647837","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

Interfacial Evolution of WC-Co/AISI 304L Diffusion Bonded Joint Obtained by Flash SPS Technique 闪光SPS技术制备WC-Co/AISI 304L扩散连接接头界面演变

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-09-18 DOI: 10.37394/232031.2023.2.7

Billel Cheniti, Brahim Belkessa, Bouzid Maamache, Naima Ouali, Viktor Puchý, Pavol Hvizdoš

引用次数: 0

On The Application Of Gibbs Equations In Determining The Relationships Of Vapour Pressures To Phase Diagrams Of The Reactive Chloride Systems 吉布斯方程在确定反应性氯化物体系蒸气压力与相图关系中的应用

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-09-18 DOI: 10.37394/232031.2023.2.6

A. A. Kipouros, G. Jarjoura, G. J. Kipouros

引用次数: 0

Modeling Dispersion Dust Aerosol Particles Monitoring and Evaluation in Desert South Sahara 南撒哈拉沙漠弥散尘埃气溶胶粒子模拟监测与评价

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-09-18 DOI: 10.37394/232031.2023.2.5

Mohammedi Ferhat, Haddad Hanane, Laggoun Chouki

引用次数: 0

Reduction in Packaging Wastes Through Identification of Lean Wastes to Deliver Efficient Waste Controlling Techniques for a Pharmaceutical Industry 通过精益废物的识别减少包装废物，为制药工业提供有效的废物控制技术

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-08-29 DOI: 10.37394/232031.2023.2.4

S. M. Hasan, Saad Khan, A. Hakam, Satya Shah

{"title":"Reduction in Packaging Wastes Through Identification of Lean Wastes to Deliver Efficient Waste Controlling Techniques for a Pharmaceutical Industry","authors":"S. M. Hasan, Saad Khan, A. Hakam, Satya Shah","doi":"10.37394/232031.2023.2.4","DOIUrl":"https://doi.org/10.37394/232031.2023.2.4","url":null,"abstract":"The purpose of this paper is to propose a method of reducing material and time waste during packaging in the pharmaceutical industry. This is done by means of identifying the four major lean wastes i.e., motion, inadequate processing, waiting, and defects. These wastes are identified and reduced by means of using lean tools and proposing other cost-effective solutions that would increase process efficiency. Material waste is dealt with through selecting optimal requirements under the constraint limits of ergonomics, engineering, and machine space availability. Along with reduction in change over time, a strategy ensuring improvement in the primary packaging area was developed. The validity of this research has been brought about by means of a case study of a multinational pharmaceutical company. The proposed system proves to be highly beneficial in ensuring wastage and time reduction in changeovers. This strategy provides improved results without any new costs introduced and the production targets were met faster. There is also a special consideration given to the ergonomic aspect of the production processes.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90168070","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

Pool Boiling Heat Transfer Enhancement through Biphilic Stepped Microchannel 通过双亲式阶梯微通道增强池沸腾传热

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-07-12 DOI: 10.37394/232031.2023.2.2

A. Walunj, A. Sathyabhama

引用次数: 0

Effective Changes In Polymer Nanocomposite Materials When They Are Modified with γ-Rays 高分子纳米复合材料经γ射线修饰后的有效变化

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2023-07-12 DOI: 10.37394/232031.2023.2.3

D. Rustamova, Elnare Firdus, Rahim Rahimov Mahammad

{"title":"Effective Changes In Polymer Nanocomposite Materials When They Are Modified with γ-Rays","authors":"D. Rustamova, Elnare Firdus, Rahim Rahimov Mahammad","doi":"10.37394/232031.2023.2.3","DOIUrl":"https://doi.org/10.37394/232031.2023.2.3","url":null,"abstract":"Composite materials based on polymer fillers have been intensively studied in recent years, and in many cases, polymer nanocomposites find new applications in the preparation of certain sensors (recorders), surface coatings of spacecraft, especial type of the sensors. In addition, it is known that the change in the size of the fillers, the resistance of the composite materials to the influence of various types of radiation ( ℽ -rays, electron, e-rays, ultraviolet rays, etc.), electrical conductivity, etc.), the study of which is still relevant today, and occupies a large place in radiation materials science. It can be noted that composite materials consisting of polymer - nanoscale fillers occupy a key place in many global research centers of the world. The purpose of the work is to obtain and study new electroactive (electret, antistatic, radiation-sensitive) polymer composite materials. Polypropylene was used as binder and 𝐴𝑙 2 𝑂 3 oxide as filler in this work. In other research works, the sizes of the oxide fillers were large. In this study, nanofillers were used. Experiments show that as the size of oxide particles decreases, its electret properties improve. At the same time, the relaxation process of electret charges of polymer composites also depends on the value of the initial irradiation dose of 𝛾 -rays. As a result of studying the relaxation 𝛼 -, 𝛽 - and 𝛾 - processes of 𝑃𝑃 𝛼⁄ - 𝐴𝑙 2 𝑂 3 composites in the temperature range of 100 ÷ 500 K by the radio-thermo-luminescence (RTL) method, it was determined that the maximum at T = 230 K, the observed luminescence peak from the filler concentration ((20÷40) % 𝛼 - 𝐴𝑙 2 𝑂 3 ) and varies proportionally depending on the radiation dose, and it can be used as a dosimeter in γ-dosimetry at a dose rate of up to 50 kGr.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90336408","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