Browse

You are looking at 51 - 52 of 52 items for :

Clear All
Open access

Ingunda Sperberga, Polina Spela, Maris Rundans and Andris Cimmers

Abstract

Materials were synthesized from illite based clay from Latvia by chemical and thermal activation using both NaOH and KOH solutions (4−6 M). Compressive strength and apparent porosity were measured. Effect of concentration of both solutions on the mechanical properties of the material was investigated by means of infrared spectroscopy (IR). Compressive strength data showed that alternative building materials could be obtained via alkaline activation.

Open access

Diāna Dūdare and Māris Kļaviņš

Abstract

Peatland cores provide us with the potential to research aspects of atmospheric cycling of elements, such as metal pollutants, on timescales. Our study provides a better understanding of basic peat properties and their effects on trace and major element distributions in peat and its humic substances (HS). Humic substances isolated from an ombrotrophic bog peat profiles (Latvia) were used as study objects. Relations among peat depth, properties of peat and its HS (elemental composition), as well as element content, were studied.