Procedia Chemistry最新文献_第8页

Long-term Environmental Assessment of Waste from PyroGreen System 焦绿系统废弃物的长期环境评价

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.10.059

Heejae Ju, Inhye Hahm, Sungjune Sohn, Il Soon Hwang

{"title":"Long-term Environmental Assessment of Waste from PyroGreen System","authors":"Heejae Ju, Inhye Hahm, Sungjune Sohn, Il Soon Hwang","doi":"10.1016/j.proche.2016.10.059","DOIUrl":"10.1016/j.proche.2016.10.059","url":null,"abstract":"<div><p>We have conducted a long-term environmental assessment of a geological repository for Intermediate Level Wastes (ILW) arising from PyroGreen processes that has been developed to decontaminate all HLW from the pyrochemical partitioning of spent nuclear fuels (SNF). PyroGreen process has been designed so that final ILW can meet conservative acceptance criteria such as one established for the Waste Isolation Pilot Plant (WIPP) in U.S.A. The nuclide inventory of final vitrified PyroGreen waste is calculated using ORIGEN 2.1 based on the design decontamination factor of PyroGreen processes applied to 18,171 metric tons of PWR SNF with 45 GWD/MTU burnup. Using GoldSim model, the environmental impact of ILW upon geological disposal at an intermediate depth. Among radioactive nuclides, Ra226, Rn222 and Sn126 are identified as key contributors to radiological dose for general public. The environmental impact of PyroGreen wastes satisfies the Korean dose limit of 0.1 mSv/year with sufficiently high margin. Sensitivity studies have shown that the predicted dose can vary significantly by distribution coefficient of Ra226 and Rn222, solubility limit of Se79.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.10.059","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79244616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Sustainable of Laminated Rubber-Metal Spring in Transverse Vibration 橡胶-金属层合弹簧在横向振动中的可持续性

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.094

M.A. Salim, A. Putra, M.R. Mansor, M.T. Musthafah, M.Z. Akop, M.A. Abdullah, M.N. Abdul Rahman, M.N. Sudin, M.A. Shaharuzaman

引用次数: 1

The EURO-GANEX Process: Current Status of Flowsheet Development and Process Safety Studies EURO-GANEX工艺:流程开发和工艺安全研究的现状

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.10.073

Robin Taylor , Mike Carrott , Hitos Galan , Andreas Geist , Xavier Hères , Chris Maher , Chris Mason , Rikard Malmbeck , Manuel Miguirditchian , Giuseppe Modolo , Chris Rhodes , Mark Sarsfield , Andreas Wilden

{"title":"The EURO-GANEX Process: Current Status of Flowsheet Development and Process Safety Studies","authors":"Robin Taylor , Mike Carrott , Hitos Galan , Andreas Geist , Xavier Hères , Chris Maher , Chris Mason , Rikard Malmbeck , Manuel Miguirditchian , Giuseppe Modolo , Chris Rhodes , Mark Sarsfield , Andreas Wilden","doi":"10.1016/j.proche.2016.10.073","DOIUrl":"10.1016/j.proche.2016.10.073","url":null,"abstract":"<div><p>A new hydrometallurgical grouped actinide extraction process has been developed to separate the transuranic actinide ions from dissolved spent fuel solution (after an initial uranium extraction cycle). This “EURO-GANEX” process is aimed towards the homogeneous recycling of plutonium and minor actinides in a future closed fuel cycle. The separation process is based on the co-extraction of actinides and lanthanides from aqueous nitric acid into an organic phase followed by selective co-stripping of actinides. A suitable organic phase has been formulated and distribution ratios determined for lanthanides, actinides and some problematic fission products under extraction and stripping conditions. The process flowsheet has been proven on surrogate feed solutions as well as with spent fast reactor fuel; excellent recoveries of the actinides and good decontamination factors from the lanthanides and other fission products were obtained. A variation on the EURO-GANEX flowsheet (the “TRU-SANEX” process) has now been designed to produce separate Pu+Np and Am+Cm products for heterogeneous recycling. Progress on underpinning process chemistry and safety studies as well as flowsheet tests are summarized.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.10.073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79088720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 43

Welding Investigation and Prediction of Tensile Strength of 304 Stainless Steel Sheet Metal Joint by Response Surface Methodology 响应面法对304不锈钢焊接接头抗拉强度的研究与预测

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.096

Hussain Zuhailawati, Muhammad Afiq Jamaluddin, Anasyida Abu Seman, Suhaina Ismail

{"title":"Welding Investigation and Prediction of Tensile Strength of 304 Stainless Steel Sheet Metal Joint by Response Surface Methodology","authors":"Hussain Zuhailawati, Muhammad Afiq Jamaluddin, Anasyida Abu Seman, Suhaina Ismail","doi":"10.1016/j.proche.2016.03.096","DOIUrl":"10.1016/j.proche.2016.03.096","url":null,"abstract":"<div><p>This study deals with an investigation of welding behaviour of 304 stainless steel sheet metal in term of joint strength and microstructure. Composition analysis of the stainless steel plate and ER308 filler rod was performed using X-ray fluorescence and SEM-EDX. Tungsten inert gas (TIG) welding was done on SS 304 2B plate with thick-ness of 1.2mm in Coraza Systems Malaysia Sdn. Bhd using a KADEYOU machine. Response surface methodology (RSM) was employed to develop mathematical relation-ships between the welding process parameters (i.e, welding current, filler size and flow rate of the shielding gas) and the output variable of the weld joint (ultimate tensile strength) to determine the welding input parameters that led to the desired weld quality. Comparison between measured and calculated results was in good agreement indicating that the developed models can predict the responses adequately within the limits of welding pa-rameters being used. High welding current (50A) cause microstructure become finer and increase in tensile strength while low current (30A) caused root of the metal plate not weld completely which weakened the joint (724.84MPa and 718.33MPa, correspond-ingly). The smallest filler (1.6mm) was good for tensile strength (745.96 MPA) com-pared to the largest filler (2.4mm and 720.90MPa strength) because high heat energy used to melt the large filler also overheated the metal base that cause crack formation. High flow rate (14 cfh) caused tensile strength to drop (738.49MPa) due to the turbu-lence in the molten metal compared to the lowest flow rate (10 cfh and tensile 756.75MPa strength).</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73829087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Tensile Behavior of SiCNP and MWCNTs Filled Toughened Epoxy Nanocomposites: A Comparative Study SiCNP和MWCNTs填充增韧环氧纳米复合材料拉伸性能的比较研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.098

S. Ratim , S. Ahmad , N.N. Bonnia , E.S. Ali , J.A. Razak

{"title":"Tensile Behavior of SiCNP and MWCNTs Filled Toughened Epoxy Nanocomposites: A Comparative Study","authors":"S. Ratim , S. Ahmad , N.N. Bonnia , E.S. Ali , J.A. Razak","doi":"10.1016/j.proche.2016.03.098","DOIUrl":"10.1016/j.proche.2016.03.098","url":null,"abstract":"<div><p>This study is conducted to evaluate the tensile properties of silicon carbide nanoparticles (SiCNP) and multiwalled carbon nanotubes (MWCNTs) filled toughened epoxy composites as a function of filler loading. The nanocomposites with different weight percentage of SiCNP and MWCNTs loading were fabricated by mechanical blending operation assisted with an ultrasonic cavitation technique. The loadings utilized were 0, 2, 4, and 6% of total composites weight. The result shows that the optimum filler loading of both systems were obtainable at 4% of SiCNP and MWCNTs of loadings. Composite with SiCNP filler achieved the highest value of tensile strength and Young's modulus at about 11% and 4%, respectively as compared to unfilled system. The enhancement pattern in MWCNTs nanocomposite systems were not significant as compared than SiCNP composite. The tensile strength and Young's modulus of MWCNTs composite were increased at only about 7% and 2%, respectively compared than unfilled system. The strain at break attribute for both filler system had shown reduction pattern at higher loading started from 2% loading and onwards. The variation in tensile properties were further supported by the tensile fracture morphologies and clearly shown that the filler-matrix plated an important role in affecting the tensile behavior of nanocomposite produced.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72775350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Detection of Mycobacterium leprae in Formalin-Fixed Paraffin-Embedded Sample by Fite-Faraco Staining and Polymerase Chain Reaction Fite-Faraco染色与聚合酶链反应检测福尔马林固定石蜡包埋样品中的麻风分枝杆菌

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.01.036

Willy Sandhika , Dinar Adriaty , Indropo Agusni

引用次数: 3

Production of High Purity Amorphous Silica from Rice Husk 稻壳制备高纯非晶态二氧化硅

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.092

Rohani Abu Bakar , Rosiyah Yahya , Seng Neon Gan

{"title":"Production of High Purity Amorphous Silica from Rice Husk","authors":"Rohani Abu Bakar , Rosiyah Yahya , Seng Neon Gan","doi":"10.1016/j.proche.2016.03.092","DOIUrl":"10.1016/j.proche.2016.03.092","url":null,"abstract":"<div><p>Combustion of the rice husk produces rice husk ash, which consists of mainly silica. High purity silica can be produced by controlled combustion after acid treatment. In this study, leaching of rice husk with hydrochloric acid and sulfuric acid were carried out prior to combustion to obtain purer silica. It was found that pre-treatment of the rice husk with sulfuric acid had accelerated the hydrolysis and decomposition of organic components as revealed by thermogravimetry (TG) and Scanning Electron Microscopy (SEM) analyses. In a systematic study, the combustion of un-leached, hydrochloric acid-leached and sulfuric acid-leached rice husks were performed in a muffle furnace at 500, 600, 700, 800 and 900<sup>o</sup>C for 2h. Results demonstrated that all the samples produced amorphous silica (SiO<sub>2</sub>) and the average particle size were in the range of 0.50 to 0.70μm. The effect of combustion at different temperatures between 500<sup>o</sup>C and 900<sup>o</sup>C on the silica production is very small, particularly at temperature above 600<sup>o</sup>C. Thus, amorphous silica with purity above 99% as confirmed by X-Ray Fluorescence (XRF) analysis can be produced by hydrochloric and sulfuric acids leaching of the rice husk, followed by controlled combustion at 600<sup>o</sup>C for 2h. The BET surface area of the silica produced after leaching the rice husk with hydrochloric acid was higher (218 m<sup>2</sup>/g) than with sulfuric acid (209 m<sup>2</sup>/g). The silica obtained has potential application as filler in plastics and rubber compounding.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75306036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 348

Flow-sheet Study of MA Recovery by Extraction Chromatography for SmART Cycle Project SmART循环项目中提取色谱法回收MA的工艺流程研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.10.015

Sou Watanabe, Kazunori Nomura, Shinichi Kitawaki, Atsuhiro Shibara, Hirohide Kofuji, Yuichi Sano, Masayuki Takeuchi

引用次数: 12

Investigation of the Mixing Medium Effect on the Development of the CCTO Microstructure at 1000 ̊C 1000℃时混合介质对CCTO微观组织发展影响的研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/J.PROCHE.2016.03.133

R. A. Zaman, M. Abu, J. J. Mohamed, M. F. Ain, Z. Ahmad

引用次数: 4

Shortening of Amino Acids from C-terminal of PZase as Basis of Pyrazinamide Resistance in P14 Isolate of Mycobacterium Tuberculosis Strain 结核分枝杆菌P14酶c端氨基酸缩短对吡嗪酰胺耐药的基础研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.01.015

Purkan , Redianti Galuh Novarizka , Rizka Aziz Ayuningsih , Presty Nurdiana , Wiwin Retnowati

{"title":"Shortening of Amino Acids from C-terminal of PZase as Basis of Pyrazinamide Resistance in P14 Isolate of Mycobacterium Tuberculosis Strain","authors":"Purkan , Redianti Galuh Novarizka , Rizka Aziz Ayuningsih , Presty Nurdiana , Wiwin Retnowati","doi":"10.1016/j.proche.2016.01.015","DOIUrl":"10.1016/j.proche.2016.01.015","url":null,"abstract":"<div><p>Pyrazinamide (PZA) is one of the mainstays WHO-recommended drugs for therapy of tuberculosis (TB). The emergence of PZA resistance in clinical isolates of <em>M. tuberculosis</em> is often associated with <em>pncA</em> gene mutations encoding PZase. A local clinical isolate of <em>Mycobacterium tuberculosis</em> strain showed phenotipe resistant to PZA at concentration of 10μg/mL. The ORF of <em>pncA</em> gene of the isolate showed deletion of guanine base at position 81, then followed by shortening of 70 amino acids from C-terminal of PZAse which has 186 amino acid residues. The mutant of PZase took frame shift of amino acids after the residue at position 27. The <em>pncA</em> gene mutation at the level of genotype, that produced a physical-chemical alteration of the active site or the metal-binding site of PZase, in this case perturbing or lossing its activity was proposed as trigering the PZA resistance in P14 clinical isolate of <em>M. tuberculosis</em> strain.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.01.015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74467359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0