Browsing by Author "Albrektienė-Plačakė, Ramunė"

Now showing items 1-20 of 35

    • Analysis of apparent water losses, case study 

      Rimeika, Mindaugas; Albrektienė-Plačakė, Ramunė (9th International Conference "Environmental Engineering", May 22-23, 2014, Vilnius, Lithuania: selected papers CD, 2014)
      Apparent losses are the nonphysical losses that occur when water is successfully delivered to the customer but, for various reasons, is not measured or recorded accurately, thereby including a degree of error in the amount ...

    • Analysis of apparent water losses, case study 

      Rimeika, Mindaugas; Albrektienė-Plačakė, Ramunė (9th International Conference "Environmental Engineering", May 22-23, 2014, Vilnius, Lithuania: selected papers, 2014)
      Apparent losses are the nonphysical losses that occur when water is successfully delivered to the customer but, for various reasons, is not measured or recorded accurately, thereby including a degree of error in the amount ...

    • Analysis of coagulation processes for the groundwater treatment 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas; Jurkienė, Anželika (Selected Scientific Papers (SSP) - Journal of Civil Engineering, 2013)
      Coagulation process is widely used for removal of natural organic matters (NOM) and for water color intensity reduction. The efficiency of coagulation process depends on many different factors. Aim of this research is to ...

    • Application of ORP for the evaluation of water contamination 

      Račys, Viktoras; Kliučininkas, Linas; Jankūnaitė, Dalia; Albrektienė-Plačakė, Ramunė (Linnaeus Eco-Tech '10: 7th international conference on natural sciences and technologies for waste and wastewater treatment, remediation, emissions related to climate, environmental and economic effects, 22-24 November 2010, Kalmar, Sweden: proceedings / edited by: F. Kaczala, S. Azur, I. Tjäder, W. Hogland, 2010)
      Water pollution characterization consumes a lot time, facilities and materials. Application of easy applicable and accurate method for pollution determination is quit actual still now. Redox reactions in water are usually ...

    • Determination of organic matter by UV absorption in the ground water 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas; Zalieckienė, Elena; Šaulys, Valentinas; Zagorskis, Alvydas (Journal of environmental engineering and landscape management, 2012)
      Organic matter in drinking water is determined by applying indirect determination methods used for quantitative measurements such as total organic carbon (TOC), chemical oxygen demand (COD), and biochemical oxygen demand ...

    • Drinking water quality research and improvement measures 

      Albrektienė-Plačakė, Ramunė (2013)
      The dissertation examines drinking water quality and improvement measures. The object of the work is a groundwater with ammonium ions and concentrations of iron, manganese and organic compounds that exceed permissible ...

    • Efficiency of removal of iron, manganese, ammonium and organic matter from groundwater 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas (10th International conference "Environmental Engineering", 27-28 April 2017, Vilnius Gediminas Technical University, Lithuania, 2017)
      The acceptable concentrations in groundwater are usually in excess of iron, ammonium and manganese. These compounds are inefficiently removed by means of ordinary technologies of ammonium ions, iron and manganese compounds ...

    • Filtravimo užpildų efektyvumo tyrimai 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas; Petraitytė, Viktorija (Mokslas - Lietuvos ateitis : Aplinkos apsaugos inžinerija = Science - Future of Lithuania : Environmental protection engineering, 2013)
      Pagrindinė požeminio vandens, kuris Lietuvoje naudojamas kaip geriamasis vanduo, kokybės problema yra per didelės gamtinės geležies, amonio ir mangano junginių koncentracijos. Šalinti geležies, amonio ir mangano junginius ...

    • Fluoridų šalinimo iš geriamojo vandens naudojant sorbentus tyrimas 

      Siaurusevičiūtė, Irma; Albrektienė-Plačakė, Ramunė (22-osios Lietuvos jaunųjų mokslininkų konferencijos „Mokslas – Lietuvos ateitis“ teminė konferencija "Aplinkos apsaugos inžinerija", 2019 m. kovo 20 d. Vilnius = Proceedings of the 22th conference for junior researchers „Science – future of Lithuania“ "Environmental protection engineering", 20 March 2019, Vilnius, Lithuania, 2019)
      Įvairiose pasaulio vietose geriamajame vandenyje yra randamos padidėjusios fluoridų koncentracijos (Argentina, JAV, Egiptas, Jordanija, Turkija, Iranas, Irakas, Kinija, Australija, Naujoji Zelandija, Japonija, Kanada, Saudo ...

    • Fractionation of organic matter and validation of groundwater treatment technology 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas; Tamulaitienė, Birutė; Voišnienė, Violeta; Gražėnienė, Rūta (Desalination and water treatment, 2017)
      Iron and manganese often exceed the acceptable concentrations in groundwater. Conventional technologies for the iron and manganese removal from groundwater (aeration and filtration) are inefficient when the groundwater ...

    • Geležies organinių kompleksinių junginių šalinimas iš požeminio vandens naudojant koaguliantus 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas; Jankauskas, Juozas (Vandens ūkio inžinerija = Water mangement engineering, 2011)
      Lietuvos miestai ir gyvenvietės geriamąįi vandeni gauna iš vandentiekių, naudojančių tiktai požeminio vandens šaltinius. Požeminis vanduo gerai apsaugotas nuo taršos ir todėl sanitariniu-higieniniu požiuriu yra saugesnis ...

    • Geriamojo vandens kokybės tyrimai ir gerinimo priemonės 

      Albrektienė-Plačakė, Ramunė (2013)
      Disertacijoje nagrinėjama geriamojo vandens kokybė bei gerinimo priemonės. Pagrindinis tyrimo objektas yra požeminis vanduo, kuriame leistinas geriamojo vandens higienos normas viršija amonio jonai, geležies, mangano ir ...

    • Investigation of lead and iron removal from groundwater using sapropel and quartz sand 

      Heang, Sorphea; Albrektienė-Plačakė, Ramunė; Paliulis, Dainius (11th International conference "Environmental Engineering", 21-22 May 2020, Vilnius Gediminas Technical University, Lithuania, 2020)
      In Prey Nop district of Cambodia, a district in coastal area, it was observed that concentration of iron and lead in groundwater was higher than permissible values. Lead is a highly toxic heavy metal, while iron is an ...

    • Investigation of lead removal from drinking water using different sorbents 

      Albrektienė-Plačakė, Ramunė; Paliulis, Dainius (Ecological chemistry and engineering S-Chemia i inzynieria ekologiczna S, 2020)
      Lead is a heavy metal with strong toxic properties. This chemical element is found in wastewater and sometimes in drinking water. The article deals with the removal of lead(II) ions from polluted water using a sorption ...

    • Investigation of the removal of cations from aqueous solutions using sapropel 

      Albrektienė-Plačakė, Ramunė; Voišnienė, Violeta; Mucha Torre, Miguel (13th International Conference “Environmental Engineering” (ICEE-2026), 2026)
      Sapropel is a sediment found at the bottom of lakes, consisting of both organic and inorganic materials. Water contains various cations, such as ammonium, calcium, and magnesium, which are generally harmless to human health; ...

    • Investigation on applying biodegradable material for removal of various substances (fluorides, nitrates and lead) from water 

      Albrektienė-Plačakė, Ramunė; Bazienė, Kristina; Gargasas, Justinas (Materials, 2023)
      Sapropel was used as a biodegradable material for water treatment. Sapropel is a sedimentary layer of a mix of organic and inorganic substances accumulated in the bottoms of lakes for thousands of years. It is a jelly-like ...

    • Level of pollution on surrounding environment from landfill aftercare 

      Bazienė, Kristina; Tetsmann, Ina; Albrektienė-Plačakė, Ramunė (International journal of environmental research and public health, 2020)
      This work examines how the pollution from landfill aftercare effect the surrounding area and water basins. The subject of the study was a closed landfill where waste was disposed of without any accounting and operation of ...

    • Nitrogen compounds removal by membrane filtration in water treatment plant for small communities: full-scale start-up 

      Valentukevičienė, Marina; Albrektienė-Plačakė, Ramunė (Water Practice & Technology : selected papers from the Large Wastewater Treatment Plants, 4–8th September 2011, Budapest, Hungary and International Conference on Integrated Water Management, 2–5 Feb 2011, Perth, 2012)
      The aims of the work and research question deals with the removal of two natural nitrogen compounds, ammonium and nitrate and an organic compounds from groundwater in the sensitive aquatic area (Curonian Spit, Lithuania). ...

    • Organic fractions and metal-organic complexes in the groundwater 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas; Gražėnienė, Rūta (9th International Conference "Environmental Engineering", May 22-23, 2014, Vilnius, Lithuania: selected papers, 2014)
      Natural organic matters are widely used in both surface and underground waters, which are prepared as drinking water. The organic matter are divided into four fractions: very hydrophobic acids (VHA), slightly hydrophobic ...

    • Organic fractions and metal-organic complexes in the groundwater 

      Albrektienė-Plačakė, Ramunė; Rimeika, Mindaugas; Gražėnienė, Rūta (9th International Conference "Environmental Engineering", May 22-23, 2014, Vilnius, Lithuania: selected papers CD, 2014)
      Natural organic matters are widely used in both surface and underground waters, which are prepared as drinking water. The organic matter are divided into four fractions: very hydrophobic acids (VHA), slightly hydrophobic ...