In recent decades, the pollution of water with micropollutants has become an increasing environmental concern. Since 2019, increased stormwater from chlorine-based disinfectants been recorded due to COVID-19 pandemic. Runoff disinfected areas and residual chlorine present in are transported surface bodies, posing a risk aquatic flora fauna. The objectives this study were (1) evaluate efficiency different low-cost recyclable filter materials removing chlorine, (2) test plants’ ability reduce...

The properties of the hardened concrete depend on selected raw materials: size and amount particles coarse aggregate, as well ratio other components. Particular countries use various methodologies for selection composition to select components mixture. However, concrete, by using any methodology following defined conditions, must satisfy values certain necessary characteristics. results implemented research indicate that most optimal solution is aggregate multi‐fractional or discontinuous...

In case of a fire, the flame can spread from building through outer openings to outside. such cases, fire temperature thermal effect determines façade fibrocement tile destruction, while flammable thermo-insulating systems used for energy effectiveness ensures it sets on fire. The becomes uncontrollable and raises an immediate danger people inside building, event dynamics delay make harder put out Extra additive usage in tiles raise its resistance effect. Carbon fiber is widely known as...

In the last few years, ceramic tiles and from natural rock with higher measurements were used. A huge amount of tile glue is used for high-measurement gluing due to a special technology, which characterized by thicker layer. Due this, up during decorating. Regular mixture uses about 50-60% cement (according mass). carried-out experiments, lower was in production (30%). Additionally, 5%, 10%, 15%, 20% 25% sand replaced small foam glass granules. These granules are made waste. By using...

Abstract Fluoride removal from aqueous solutions was studied using nanofiltration and sorption techniques which have always been best key ways to deal with water contaminated by fluoride. In this presented work, we were firstly interested on fluoridated rejected overcoming the drawback of RO membrane process groundwater treatment plant in Baltic region (Kretinga, Lithuania). Opoka sorbent has shown effective results fluoride efficiency higher than 77 %. order understand phenomenon validate...

In recent decade water pollution by micropollutants is an increasing environmental concern. Since 2019, due to COVID-19 pandemic, increased stormwater chlorine based disinfectants has been determined. Research aimed treat of contaminated after outdoors spaces disinfection are very limited. Runoff from disinfected areas and residual present in transported surface bodies. Residual reacts with dissolved organic compounds results the formation environmentally toxic by-products. Studies event low...

When exposed to temperatures that are progressively and rapidly raised, large dimension fibre cement boards tend crack. This occurrence is analysed explained for a specific issue of asymmetric growth curvilinear crack in high temperatures. phenomenon occurred while performing Single Burning Item (SBI) experiments at fire loads which higher than those used countries the European Union, better reflect events may occur high-rise buildings. In such conditions, crack, allowing reach thermal...

This research investigates how sorbents made from recycled waste materials affect the properties of water used to remove residues flushed oil tanks transported by rail. The mineral sorbent was added following flushing process. Water temperatures were maintained at 21 °C and 70 for a contact period 30 min. experiments demonstrated that: when is active, turbidity removal efficiency about 64%; color 56% obtained; total iron concentration approximately 68%. effect characteristics on adsorption...

Pollution caused by the use of disinfectants in public spaces is a relatively new form environmental contamination. During COVID-19 pandemic 2020–2021, early research showed sevenfold increase to clean outdoor and corresponding pollution. Typically, after entering stormwater systems, are carried surface waters (e.g., rivers, seas lakes) where they react with various elements harmful compounds. In absence data, it not possible determine accurate levels pollution according latest scientific...

Every year construction demolition waste amount increases. 75 percent of this consists concrete, masonry products and tile products. Concrete reinforced concrete can be recycled reused for new product pro-duction, road installation, as well formed water treatment. Crushed particles are characterized by large surface area many voids. These particle characteristics depend on used crushing-granulating method. Particles obtained the milling method have larger number voids, higher absorbance open...

Concrete itself, and issues relating to the recycling management of reinforced concrete waste, are highly relevant, especially when urban expansion is being achieved by increased building construction volumes. This research investigates waste its (re)usage possibilities resolves several major related question how natural materials can be replaced compounds made from thereby saving resources. The experiment was carried out using mixtures, which were combined with aggregates crushed (fraction...

Groundwater is the only source for drinking water supply in Lithuania.Twenty intakes exploiting Quaternary aquifers are operating Vilnius City.The main aim of this study was to characterize heavy metal content internal pipeline sediments network.It also provides a new insight into accumulation phosphorus and its variation area.The results research reflect level metals that accumulated during process.The microelements detected were lead, nickel, zinc copper.The will be useful conducting...

Recyclable construction waste can be used as a low-cost material to reduce stormwater pollution caused by various pollutants. In recent years, studies have reported increased water contamination from chlorine and compounds its negative impact on aquatic ecosystems. When assessing the need for recycling, circularity, reuse, it is worth evaluating capacities of materials residual chlorine. Laboratory experiments using bentonite (bentonite clay) sodium hypochlorite solutions were carried out...

Concrete – complex structure composite material consisting of the components with various and size. Not only coarse fine aggregates are used in concrete production, but also filler aggregates. Aggregates natural, man-made origin or aggregates, produced from recycled materials, can be utilised production. materials by reprocessing reinforced waste. The influence crushed waste on characteristics binder’s paste, when part binder (5; 10; 15; 20; 25; 30 %) is replaced such aggregate, analysed...

This article covers the investigation of catalyst waste (T.R.M 1 and T.R.M 2) produced in reactor oil catalytic cracking.The analysis this was carried out.The properties 2 were investigated determined, mineralogical implemented, thermal effects during burning performed.Catalyst materials used a ceramic system (from 7  to 20 overall amount).It identified that optimal quantity additive formation mixes 10%.With amount additive, after at 1050C temperature, systems with following formed: total...

Inorganic material – granulated foam-glass produced from glass breakage in small porous granule shape. Foam-glass is gotten by connecting thoroughly grounded with foamers, later this composition heated the furnace especially high temperature and turned into various diameter greyish granules. Granulated a unique ecological of which inner structure pores are arranged such way that air trapped inside. production technology one most advanced since product made secondary raw materials, not...

Betonas yra statybinė medžiaga, gaunama sukietėjus mišiniui, paruoštam iš stambiųjų ir smulkiųjų užpildų, rišančiosios medžiagos – cemento vandens. Cemento užpildų kokybė savybės, v/c santykis, mišinio sutankinimo vienodumas lemia pagrindines betono savybes. Betono stipris gniuždant viena svarbiausių savybių. gamyba susijusi su energijos sąnaudomis, o šiais laikais labai svarbu kuo daugiau sumažinti išlaidas, susijusias gamyba. Straipsnyje nagrinėjami betoninių gelžbetoninių atliekų...

The investigation of the composite ceramic system containing easily fusible hydro-micous clay, technogenic finely dispersed raw material, and burning out waste additive is presented in article. properties materials used are described paper. obtained bodies were burned at 1000 °C 1050 temperatures, keeping highest temperature for 4 h. analysis physical-mechanical ceramics (density, compressive strength, water absorption), its structural parameters (effective total open porosity, reserve pore...