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Magdalena Michel Marta Tytkowska Faculty of Civil and Environmental Engineering Warsaw University of Life Sciences - SGGW, Poland A study of chalcedonite.

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Prezentacja na temat: "Magdalena Michel Marta Tytkowska Faculty of Civil and Environmental Engineering Warsaw University of Life Sciences - SGGW, Poland A study of chalcedonite."— Zapis prezentacji:

1 Magdalena Michel Marta Tytkowska Faculty of Civil and Environmental Engineering Warsaw University of Life Sciences - SGGW, Poland A study of chalcedonite coated with manganese dioxide XV th conference Drinking Water October 8-10, 2013 Trenčianske Teplice, Slovakia

2 Occurence of chalcedonite sedimentary rock occurs in Poland in Inowłódz mined from Teofilów deposit two varieties of chalcedonite: consistent and compact (A) porous and pumice-like (B) A B [1]

3 Properties of chalcedonite siliceous rock, almost homogeneous (SiO 2 content exceeds 94%) [2] hydrophilic character [3] low specific surface area m 2 /g [1-3] specific density 2600 kg/m 3 [4] total pore volume cm 3 /g [1] and 0.04 cm 3 /g [3] calculated porosity inside the grains 0.10 [-] sphericity of grains 0.55 [4] porosity of filtration bed 0.51 [4]

4 Application of chalcedonite for water treatment good filter material, useful for removal iron from underground water: large mass capacities of bed long filtration cycles (comparing with sand) [5] effectively removes manganese after long-time filtration (20-80 days) [5, 6] used as a base in nitrification biofilter for ammonium ion removal [7] very good MnO 2 carrier - impregnation using various chemical methods [8] after MnO 2 modification its sorptive and catalitic properties are comparable to greensand [9, 10] MnO 2 modified chalcedonite can be used as a chemical active bed for effective iron and manganese removal [9, 10] natural chalcedonite modified chalcedonite

5 Aim of study to determine how multiple deposition of the MnO 2 coat affects increase in the sorption capacity of chalcedonite Methods classic batch test – sorption of manganese(II) on: natural chalcedonite (NC) MnO 2 coated chalcedonite; one, two, three and four times modified (MD1MC-MD4MC) to model the sorption data, the Langmuir isotherm equation was used to compare the sorption properties of materials, the q m constant was used

6 Results q m [mg/g] δ q m [mg/g] Fig. 1. Langmuir isotherms of manganese(II) sorption on the tested materials very good adjustment of the model to the experimental data (r ) favourable character of manganese(II) sorption process (R L ) modification significantly increases the sorption capacity of chalcedonite subsequent modifications also increase the sorption capacity, but the rate of change is decreasing

7 Results NCMD1MC MD2MC MD3MC MD4MC NC - light-beige grains, irregular surface, visible cracks MD1MC - MnO 2 deposited in clusters, incomplete coverage MD2,3,4MC - continuous brown-black coat of MnO 2, no differences in the grains appearance

8 Conclusions natural chalcedonite has minimal sorption properties its surface can be successfully modified with MnO 2 single modification increases the sorption capacity eleven times double modification increases the sorption capacity twenty times further modifications increase the sorption capacity just twenty-four and twenty-six times in practice the use of single and double modification is sufficient

9 References [1] Michel M.M. 2011: Charakterystyka chalcedonitu ze złoża Teofi lów pod kątem możliwości wykorzystania w technologii uzdatniania wody i oczyszczania ścieków [Characteristics of chalcedonite from Teofi lów deposit for possible use in technology of water and wastewater treatment. Engl. summ.]. Gosp. Sur. Min. 27: 49–67. [2] Ratajczak T., Wyszomirski P. 1991: Charakterystyka mineralogiczno-surowcowa chalcedonitów spongiolitowych z Teofilowa nad Pilicą [Mineralogical and technological characteristics of spongolithic chalcedonites of Teofi lów on Pilica. Engl. summ.]. Gosp. Sur. Min. 7 (1): 65–84. [3] Tchórzewska D., Pabis J., Kosk I., Nieć M. 2001: Nowe zastosowania chalcedonitu jako sorbentu w procesie oczyszczania wód [The use of chalcedonite as a sorbent for water treatment. Engl. summ.]. Przegląd Geologiczny vol. 49 (4): 303–306. [4] Siwiec T. 2012: Graniczne wartości parametrów płukania wybranych złóż filtracyjnych. Gaz, Woda i Technika Sanitarna 1: [5] Sozański M.M., Jeż-Walkowiak J., Weber Ł., Szambelańczyk K. 2007: Badania w skali pilotowej i technicznej odżelaziania i odmanganiania wód podziemnych w procesie filtracji przez złoża chalcedonitowe [Pilot and full scale research on iron and manganese removal from groundwater in filtration process through chalcedonit sand. Engl. summ.]. Instal 10: 60–64. [6] Weber Ł., Szambelańczyk K. 2006: Badania technologiczne nad uzdatnianiem wody podziemnej na złożach chalcedonitowych na Stacji Uzdatniania Wody Nowy Folwark. Forum Eksploatatora 1 (22): 31–33. [7] Papciak D., Puszkarewicz A., Kaleta J. 2012: Porównanie skuteczności usuwania manganu(II) i azotu amonowego w procesie biofiltracji na złożach chemicznie aktywnych [Comparison of removal efficiency of manganese(II) and ammonium nitro gen in the biofiltration process on the chemically active beds. Engl. summ.]. Editors: Dymaczewski Z., Jeż-Walkowiak J. Materials of 10 th International Conference Water Supply and Water Quality, Poznań, Poland. [8] Michel M.M. 2012: A study of application of chalcedonite as a manganese dioxide carrier. Ann. Warsaw Univ. of Life Sci.– SGGW, Land Reclam. 44 (1): 63–73. [9] Michel M.M. 2009: Odmanganianie wody podziemnej na modyfikowanym chalcedonicie. Gaz, Woda i Technika Sanitarna 4: 22–26. [10] Michel M.M. 2012: A study of application the modified chalcedonite for underground water treatment. Ann. Warsaw Univ. of Life Sci.– SGGW, Land Reclam. 44 (2): 91–100.

10 Thank you for your attention Q&A PhD Eng. Magdalena Michel


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