Improvement of filtration properties of ghidirim diatomite (Republic of Moldova)
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POSTOLACHI, Larisa; RUSU, Vasile; LUPASCU, Tudor. Improvement of filtration properties of ghidirim diatomite (Republic of Moldova). In: Ecological and environmental chemistry 2017The 6th International Conference. 2-3 martie 2017, Chișinău. Chisinau, Republic of Moldova: Academy of Sciences of Moldova, 2017, pp. 175-176.
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Ecological and environmental chemistry 2017 2017
Conferința "Ecological and environmental chemistry 2017"
Chișinău, Moldova, 2-3 martie 2017

Improvement of filtration properties of ghidirim diatomite (Republic of Moldova)

Pag. 175-176

Postolachi Larisa, Rusu Vasile, Lupascu Tudor
Institute of Chemistry of the Academy of Sciences of Moldova
Disponibil în IBN: 15 martie 2019


Diatomite’s highly porous structure, low density and high surface area resulted in a number of industrial applications as filtration media for various beverages and inorganic and organic chemicals. The diatomite from the Ghidirim location of Republic of Moldova was used for investigations. The percentages of chemical weight of the natural diatomite as follows: SiO2 – 85.4%, Al2O3 – 3.0%, Fe2O3 – 1.9%, CaO – 1.8%, MgO – 0.6% [1]. The filtration quality is an important property of the adsorbents to be used in water treatment, since most adsorption purification processes depend on filtration. The filtration quality of diatomite could be significantly improved after treatment with different agents [2, 3]. The raw diatomite was modified by treatment with Na2CO3 solution of different concentrations (1, 5, 10 and 20%). The filtration rate of raw and modified diatomite was determined using suction filtration method [4]. The treatment of diatomite by sodium carbonate resulted in an increased filtration rate. There was registered the higher filtration rate for sample treated with Na2CO3 of 20% concentration, being of 38 mL∙m-2s-1.