Clay Ceramic Pellets for Water Treatment / Mālu keramikas granulas ūdens apstrādei

Švinka, Ruta; Švinka, Visvaldis; Pudže, Inga; Damberga, Mārīte

doi:10.1515/msac-2015-0007

Cited by 3 publications

(5 citation statements)

References 9 publications

(4 reference statements)

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“…These gaseous products promoted expansion of clay ceramic in the pyroplastic state. Regardless of the used raw clays, all thermally treated pellets had a similar bulk density values 1.10±0.02 g/cm 3 .…”

Section: Resultsmentioning

confidence: 90%

“…The lowest sorption was determined for the powder of Liepa clay ceramic, i.e., 43.2 mg/g J 2 , while adsorbed amount of iodine on the Apriki clay ceramic powder was 67.3 mg/g. In the our previous works considerably smaller adsorption of iodine was obtained on the slowly fired pellets with addition of small amount of sawdust [3,5,6]. In the SEM picture (Fig.…”

mentioning

confidence: 66%

“…Over the last twenty years, general interest on clays and clay ceramic have been related with investigation of sorption properties. Various organic additives such as sawdust [1], rice husk [2] and glycerol [3,4] have been used to increase a porosity of the ceramic. Sorption properties of such porous ceramic depend on the type of clay, as well as additive, sintering temperature and pore structure of the ceramic [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Pyrolysis of Wood by Presence of Clay Minerals

Švinka

Leščinskis

et al. 2018

KEM

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Devonian, and Quaternary clays of Latvia together with additive of sawdust after plastic moulding of pellets were used. Partial oxidation of sawdust and formation of active carbon after thermal shock at temperature 800°C were determined. The main clay mineral in all of clays was hydromica with some difference in the structure. Obtained materials with bulk density 1.1 g/cm3 as sorbent for different chemicals such as iodine and methylene blue was used. Dependence of sorption ability of pellets on the type of used clay (clay minerals) was determined. XRD for the determination of phase compositions, nitrogen absorption for the pore size distribution, SEM for the analysis of structure and nanoscale Zetasizer for the determination of surface charge were used.

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Section: Resultsmentioning

confidence: 90%

mentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

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Catalytic Pyrolysis of Wood by Presence of Clay Minerals

Švinka

Leščinskis

et al. 2018

KEM

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“…Two sharp endothermic effects at temperatures 777 °C and 853 °C represents dissociation of dolomite and calcite respectively. (Svinka et al 2011) Total mass loss reaches 32.6 %. The results of XRD analysis show that crystalline phases of synthesized composition after firing are equal to crystalline phases in dolomitic marl fired at the same temperature (Fig.…”

Section: Resultsmentioning

confidence: 94%

Investigation of Physical and Chemical Properties of Low-temperature Hydraulic Binder from Latvia’s Raw Materials

Barbane

Vītiņa

Lindiņa

et al. 2013

Journal of Sustainable Architecture and Civil Engineering

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A necessity of compatible material to historical romancement for restoration needs has led to research of artificially made binders from mixtures of clay and dolomite. Low temperature hydraulic binder or so called dolomitic romancement synthesis of mixture composed from local Quaternary period clay and dolomite (both in powder state) in mass ratio 24:76 is discussed in this paper. The chemical composition of the raw materials was analyzed. Specimens were prepared by homogenizing the mixture of requisite amounts of clay and dolomite in dry state and shaping samples measuring 56x26x6 mm by semidry pressing. After firing at temperatures between 650 and 1050°C crystalline phases formed in samples were determined by XRD. Afterwards, water was added to the samples and formation of new crystalline phases was detected in the period of 28 days. Natural dolomitic marl was treated at the same conditions in order to compare the crystalline phases formed in naturally and artificially made binders. The results of XRD analysis show that crystalline phases of synthesized composition after firing are equal to crystalline phases in dolomitic marl fired at the same temperature. The main crystalline phases are quartz (SiO2), calcium oxide (CaO), dicalcium silicate (2CaO•SiO2), tricalcium aluminate (3CaO•Al2O3), gehlenite (2CaO•Al2O3•SiO2) and magnesium oxide (MgO). Chemical and mineralogical composition that is close to historical material is one of the main requirements for restoration materials as they provide compatibility.

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“…XI. tabulā parādīts ar dzīvsudraba porozimetrijas metodi (PoreMaster, Quantachrome Instrument) noteiktās porainības un īpatnējās virsmas laukuma salīdzinājums 800-1100 °C temperatūrās apdedzinātām kvartāra mālu keramikas granulām [15], [16]. Prometeja māliem bez koksnes skaidām pievienots arī 2 % glicerīna.…”

Section: A Devona Mālu Keramikas Granulasunclassified

Celtniecības keramika, keramzīts un keramiskie sorbenti

Švinka

2018

SJ MSAC

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1,2 Silikātu materiālu institūts, Materiālzinātņu un lietišķās ķīmijas fakultāte, Rīgas Tehniskā universitāte, LatvijaKopsavilkums. Vēsturiski viena no silikātu tehnoloģijas katedras pamattēmām vienmēr ir bijusi celtniecības materiālu pētīšana un jaunu materiālu izstrāde. Tie ir gan keramikas materiāli, gan materiāli uz neorganisko javu saistvielu bāzes. Ir analizētas un salīdzinātas šo materiālu īpašības: siltuma vadāmība, līdzsvara mitrums, mehāniskās īpašības. Salīdzinātas rūpnieciskos apstākļos un laboratorijā iegūtu dažādu Latvijas mālu keramikas materiālu īpašības un struktūra. Aprakstīta dažu rūpniecisko atkritumu ietekme uz keramikas materiālu īpašībām. Aprakstīta arī jauna keramikas materiāla keramzīta ražošanas tehnoloģija -vienas stadijas paņēmiens, kas ļauj paplašināt keramzīta ražošanai izmantojamo izejvielu bāzi un variēt keramzīta īpašības atkarībā no paredzamā pielietojuma. Pētīta dažādu Latvijas mālu noderība porainu keramisku sorbentu iegūšanai, par poru veidotājiem izmantojot organiskas dabas ražošanas atkritumus. Analizēta keramikas virsmas apstrāde, piemēram, apstarošana ar paātrinātajiem elektroniem un nanodaļiņu pārklājumi, keramikas granulu sorbcijas spējas palielināšanai un noderība fotokatalītiskai organisku piesārņotāju sadalīšanai.Atslēgas vārdi -poraina celtniecības keramika, keramzīts, līdzsvara mitrums, siltuma izolācija, keramikas granulas, sorbenti. I. Celtniecības keramikaIr salīdzinātas dažu celtniecībā plaši izmantotu būvmateriālu (māla ķieģeļu, Keraterm bloku, silikātķieģeļu, gāzbetona, keramzītbetona un betona) ūdens uzsūkšanas kinētika un līdzsvara mitrums ar ūdens tvaikiem piesātinātā atmosfērā. Salīdzināta arī dažu sausu un līdzsvara mitruma stāvoklī esošu rūpniecisko materiālu siltuma vadāmība. Salīdzināšanai ar pussausās presēšanas paņēmienu no dažādiem Latvijas

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Clay Ceramic Pellets for Water Treatment / Mālu keramikas granulas ūdens apstrādei

Cited by 3 publications

References 9 publications

Catalytic Pyrolysis of Wood by Presence of Clay Minerals

Catalytic Pyrolysis of Wood by Presence of Clay Minerals

Investigation of Physical and Chemical Properties of Low-temperature Hydraulic Binder from Latvia’s Raw Materials

Celtniecības keramika, keramzīts un keramiskie sorbenti

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