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Comparison of Structure and Properties of Differently Treated Illite Clay and Products 不同处理伊利石粘土及其制品的结构与性能比较
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.020
G. Sedmale, A. Korovkins, O. Muter, I. Šperberga, M. Rundans
{"title":"Comparison of Structure and Properties of Differently Treated Illite Clay and Products","authors":"G. Sedmale, A. Korovkins, O. Muter, I. Šperberga, M. Rundans","doi":"10.7250/MSAC.2013.020","DOIUrl":"https://doi.org/10.7250/MSAC.2013.020","url":null,"abstract":"The investigation is focused on modification of the structure 2:1 sheet silicates - illite clay by subjecting them to chemical and microbiological impact. It is shown that alkaline activation of illite clay by sodium hydroxide leads to the slight structural changes mainly characterized by water link changes. The effect of bacteria Ps. fluorescens AM PS11on structure changes of illite is small and is influenced on rheology of treated clay.It is shown that the influence of chemical treatment on porosity, bulk density and increase of compressive strength of sintered ceramic samples is notable.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"31 1","pages":"51-55"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86024801","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
Termiskās apstrādes ietekme uz illītu saturošu Latvijas mālu īpatnējo virsmu
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.017
Vitālijs Lakevičs, Olga Kaplinova, Valentīna Stepanova, Inga Dušenkova, Līga Bērziņa-Cimdiņa
{"title":"Termiskās apstrādes ietekme uz illītu saturošu Latvijas mālu īpatnējo virsmu","authors":"Vitālijs Lakevičs, Olga Kaplinova, Valentīna Stepanova, Inga Dušenkova, Līga Bērziņa-Cimdiņa","doi":"10.7250/MSAC.2013.017","DOIUrl":"https://doi.org/10.7250/MSAC.2013.017","url":null,"abstract":"Darbā eksperimentāli pētīta slāpekļa gāzes sorbcija uz dabīgiem un termiski apstrādātiem Latvijas mālu paraugiem ar daļiņu lielumu zem 63μm no cetrām atradnēm – Tūjas (devona periods), Ceplīsi un Pavāru (kvartāra periods) un Strēļu (juras periods). Mērīta iegūto mālu paraugu īpatnējā virsma. Analizēta termiskās apstrādes ietekme uz mālu paraugu sorbcijas īpasībām. Noskaidrots, ka termiskā apstrāde 300 oC palielina mālu paraugu īpatnējo virsmu, bet temperatūras paaugstināsana līdz 500 – 900 oC – samazina, salīdzinot ar termiski neapstrādāto paraugu īpatnējās virsmas lielumiem.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"2 1","pages":"35-39"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88444191","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
Latvijas atradņu kvarca smiltis kā pucolāna piedeva betonam
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.023
Janīna Sētiņa, Vasilijs Akishins, Aļona Gabrene, Ieva Ose
{"title":"Latvijas atradņu kvarca smiltis kā pucolāna piedeva betonam","authors":"Janīna Sētiņa, Vasilijs Akishins, Aļona Gabrene, Ieva Ose","doi":"10.7250/MSAC.2013.023","DOIUrl":"https://doi.org/10.7250/MSAC.2013.023","url":null,"abstract":"Pētītas Latvija devona (Bāles atradne) un juras perioda (Skudras atradne) kvarca smiltis kā dispersās pucolāna piedevas betonam. Veikta abu atradņu smilsu smalcināsana ūdens vidē, noteikts mineraloģiskais, granulometriskais sastāvs un morfoloģija pirms un pēc smilsu smalcināsanas. Analizēta un izvērtēta dažāda granulometriskā sastāva smilsu pucolānu reakcijas aktivitāte, nosakot to kā brīvā kalcija hidroksīda daudzumu sķīdumā. Analizēts cementa pastas hidratācijas process atkarībā no Skudras un Bāles atradņu kvarca smilsu dispersitātes un apstrādes laika. Konstatēts, ka augstas dispersitātes Latvijas kvarca smiltīm piemīt pucolāna īpasības, tās veicina cementa pastas hidratācijas procesu un kristālisko kalcija hidrosilikātu veidosanos.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"120 1","pages":"69-75"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87722613","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
Suitability of Illite Based Clays of Latvia for Chemical and Thermal Activation 拉脱维亚伊利石基粘土化学和热活化的适宜性
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.019
Ingunda Sperbergs, M. Rundans, G. Sedmale, A. Cimmers, V. Segliņš
{"title":"Suitability of Illite Based Clays of Latvia for Chemical and Thermal Activation","authors":"Ingunda Sperbergs, M. Rundans, G. Sedmale, A. Cimmers, V. Segliņš","doi":"10.7250/MSAC.2013.019","DOIUrl":"https://doi.org/10.7250/MSAC.2013.019","url":null,"abstract":"Materials has been synthesized in the temperature range from 600-800 0C from illite based clays of Latvia under activation of KOH and NaOH solutions (4-6 M). Compressive strength and apparent porosity were measured. The effect of the concentration of KOH and NaOH solutions on the material mechanical properties was investigated by means of infrared spectroscopy (IR). Compressive strength data of the materials showed that via such activation building materials with good quality can be obtained.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"9 1","pages":"46-50"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87734990","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: 2
FexOy-ZnO kompozītu nanodaļiņu sintēze un raksturošana
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.024
Aļona Gabrene, Anzelms Zukuls, Inna Juhņeviča, Janīna Sētiņa
{"title":"FexOy-ZnO kompozītu nanodaļiņu sintēze un raksturošana","authors":"Aļona Gabrene, Anzelms Zukuls, Inna Juhņeviča, Janīna Sētiņa","doi":"10.7250/MSAC.2013.024","DOIUrl":"https://doi.org/10.7250/MSAC.2013.024","url":null,"abstract":"Organisko un neorganisko nanokompozītu materiālu klase ir ātri augosa pētniecības nozare. Paslaik nemitīgi tiek meklētas jaunas iespējas uzlabot un kontrolēt to nanomēroga struktūras ar inovatīvām sintēzes metodēm. Metālu oksīdu kompozītu pielietojumu nosaka to fotokatalītiskās, magnētiskās un fotoluminiscentās īpasības. Ar nogulsnēsanas metodi iegūti FexOy-ZnO kompozīti ar dažādu Zn2+:Fe3+ attiecību, kuru raksturosanai izmantota rentgenstaru difrakcijas analīze, Furjē-IS spektroskopija, gaismas absorbcijas un fotoluminiscences spektroskopija, kā arī veikti gāzes jutības mērījumi.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"1 1","pages":"76-81"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72810736","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
Jauni keramikas materiāli un tehnoloģijas
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.021
G. Sedmale, Ingunda Šperberga, Artūrs Korovkins, Inga Kuzņecova, Māris Rundāns
{"title":"Jauni keramikas materiāli un tehnoloģijas","authors":"G. Sedmale, Ingunda Šperberga, Artūrs Korovkins, Inga Kuzņecova, Māris Rundāns","doi":"10.7250/MSAC.2013.021","DOIUrl":"https://doi.org/10.7250/MSAC.2013.021","url":null,"abstract":"Dots pārskats par rezultātiem enerģiju tauposu tehnoloģiju un relatīvi jaunu keramikas materiālu izstrādi, izmantojot Latvijas minerālās izejvielas. Parādīts, ka illītu mālu ķīmiskā apstrāde ievērojami samazina materiāla saķepināsanas temperatūru un nodrosina augstu spiedes pretestību, salīdzinot ar tradicionāli iegūtiem keramikas materiāliem. Mikrobioloģiskā mālu apstrāde maz ietekmē plastisku mālu plasticitātes/plūstamības izmaiņas. Izstrādāti mullīta-ZrO2 augstas stiprības keramikas materiāli ar illīta mālu piedevu, kā arī augsttemperatūras, kordierīta un paaugstinātas porainības keramikas materiāli.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"14 1","pages":"56-62"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78461220","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
Dabīgu un apstrādātu mālu antimikrobiālā aktivitāte
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.031
Vizma Nikolajeva, Tatjana Griba, Zaiga Petriņa, Jūlija Karasa
{"title":"Dabīgu un apstrādātu mālu antimikrobiālā aktivitāte","authors":"Vizma Nikolajeva, Tatjana Griba, Zaiga Petriņa, Jūlija Karasa","doi":"10.7250/MSAC.2013.031","DOIUrl":"https://doi.org/10.7250/MSAC.2013.031","url":null,"abstract":"Pētīta dabisku mālu un termiski un ķīmiski apstrādātu māla materiālu antimikrobiālā aktivitāte. Pētītajiem Latvijas dabiskajiem māliem nav konstatēta antimikrobiāla iedarbība. Prometeja atradnes māla keramikas granulas ūdens vidē inhibēja baktēriju augsanu. Antimikrobiālā aktivitāte skaidrota ar bāzisko metālu oksīdu saturu. Katjonu virsmas aktīvās vielas saturosi māli uzrādīja antibakteriālu un antifungālu iedarbību. Paveras iespējas izstrādāt jaunas antimikrobiālu māla materiālu iegūsanas tehnoloģijas un produktus.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"38 1","pages":"142-147"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89972382","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
Different Type Clay Amendments for Lead Immobilization in Contaminated Soils 不同类型粘土改良剂对铅在污染土壤中的固定化作用
Materials Science and Applied Chemistry Pub Date : 2014-02-14 DOI: 10.7250/MSAC.2013.030
Juris Burakovs, A. Karklina, Andris Karpovičs, M. Kļaviņš
{"title":"Different Type Clay Amendments for Lead Immobilization in Contaminated Soils","authors":"Juris Burakovs, A. Karklina, Andris Karpovičs, M. Kļaviņš","doi":"10.7250/MSAC.2013.030","DOIUrl":"https://doi.org/10.7250/MSAC.2013.030","url":null,"abstract":"Contamination with lead in soil is a crucial problem in industrial and military sites. Immobilization of lead by natural and modified clay as soil amendment can be an effective solution to this problem. Quaternary and Devonian clays were chosen for modification with NaCl, CaCl2, FeOOH and Ca10(PO4)6(OH)2 in different proportions of Ca/P equimolar ratio to test and compare immobilization efficiency of lead (II) on raw and modified clays by using a batch leaching test. The aim of the study is to compare different types of raw and modified clays as soil amendments by lead immobilization properties.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"2 1","pages":"137-141"},"PeriodicalIF":0.0,"publicationDate":"2014-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89768721","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
Spectroscopic Monitoring of Biodiesel Aging 生物柴油老化的光谱监测
Materials Science and Applied Chemistry Pub Date : 2013-10-18 DOI: 10.7250/MSAC.2013.012
M. Svilans, Aivars Blūms, R. Kampare
{"title":"Spectroscopic Monitoring of Biodiesel Aging","authors":"M. Svilans, Aivars Blūms, R. Kampare","doi":"10.7250/MSAC.2013.012","DOIUrl":"https://doi.org/10.7250/MSAC.2013.012","url":null,"abstract":"The suitability of absorption and fluorescence spectroscopy for monitoring biodiesel aging is assessed. Changes recorded in the UV/VIS and IR spectra during accelerated aging experiments are analysed with respect to corresponding changes in a selection of chemical and physical properties of biodiesel, namely, induction period, viscosity and acid number. A novel approach for evaluating fluorescence spectral data is presented. It is determined that fluorescence spectroscopy provides excellent sensitivity for detecting changes in biodiesel properties during early aging. Thus, a new sensitive method based on fluorescence for monitoring the quality of biodiesel is proposed.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"24 1","pages":"85-91"},"PeriodicalIF":0.0,"publicationDate":"2013-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88226314","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: 4
Biodiesel Synthesis from Rapeseed Oil in the Presence of Sodium and Potassium Hydroxides 菜籽油在氢氧化钠和氢氧化钾存在下合成生物柴油
Materials Science and Applied Chemistry Pub Date : 2013-10-18 DOI: 10.7250/MSAC.2013.003
V. Kampars, K. Malins, T. Rusakova, Z. Šustere, J. Brinks
{"title":"Biodiesel Synthesis from Rapeseed Oil in the Presence of Sodium and Potassium Hydroxides","authors":"V. Kampars, K. Malins, T. Rusakova, Z. Šustere, J. Brinks","doi":"10.7250/MSAC.2013.003","DOIUrl":"https://doi.org/10.7250/MSAC.2013.003","url":null,"abstract":"Biodiesel is produced by methanolysis or ethanolysis of triglycerides, and there are many factors affecting the transesterification process. The most important variables of the transesterification reaction are as follows: quality of the oil, catalyst type, concentration of catalyst, molar ratio of alcohol to oil, temperature and reaction time. The literature studies show that there is not a generally accepted procedure for the characterisation of transesterification reactions results and catalyst formulation activity. Therefore, even the evaluation of the usability of the most utilised industrial catalysts (sodium hydroxide and potassium hydroxide) is inconsistent. The experimental investigations of the transesterification reactions of high quality rapeseed oil in the presence of the above mentioned catalysts by change of all the variables allow us to regard two different characteristics of each reaction (reaction yield and process yield) that has to be determined. The comparison of these two characteristics gives a new instrument for classification of catalyst formulations. In the case of high quality rapeseed oil, sodium hydroxide and potassium hydroxide have shown a similar activity. Sodium hydroxide is more preferable when the concentration area of the used catalysts is low, but potassium hydroxide – at the high concentration area of catalysts.","PeriodicalId":18239,"journal":{"name":"Materials Science and Applied Chemistry","volume":"11 1","pages":"15-20"},"PeriodicalIF":0.0,"publicationDate":"2013-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78322846","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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