Efficient removal of mercury from acidic solutions of HgCl2 by sorbents prepared from vegetable oils by inverse vulcanization

0558242 - ÚCHP 2023 RIV SK eng C - Konferenční příspěvek (zahraniční konf.)
Svoboda, Karel - Ružovič, Tomáš - Pohořelý, Michael
Efficient removal of mercury from acidic solutions of HgCl2 by sorbents prepared from vegetable oils by inverse vulcanization.
Proceedings 48th International Conference of the Slovak Society of Chemical Engineering SSCHE 2022 and Membrane Conference PERMEA 2022. Bratislava: Faculty of Chemical and Food Technology STU, 2022 - (Mihaľ, M.), s. 1-13. ISBN 978-80-8208-070-7.
[International Conference of the Slovak Society of Chemical Engineering SSCHE 2022 and Membrane Conference PERMEA 2022 /48./. Tatranské Matliare (SK), 23.05.2022-26.05.2022]
Grant CEP: GA MŠMT(CZ) EF16_026/0008413
Institucionální podpora: RVO:67985858
Klíčová slova: inverse vulcanization * mercury removal * acidic solutions
Obor OECD: Energy and fuels

Mercury is a dangerous toxic element for the environment. Incineration of municipal solid waste (MSWI) belongs to important sources of Hg-emissions today. Conversion of mercury and mercury compounds from soluble and toxic forms into water insoluble/non-toxic form of HgS is needed in waste residues from flue gas cleaning. Gaseous HCl and a significant part of HgCl2 vapors present in flue gas from MSWI can be removed from flue gas by absorption into hot water. Efficiencies of Hg2+ removal from acidic water solutions by means of sorbents prepared by catalyzed reaction of sulfur with vegetable oils (inverse vulcanization) were studied. These kinds of sorbents were tested and
found to be exploitable for removal of mercury ions from water solutions, particularly from acidic solutions containing HCl at higher temperatures (50 – 75 oC), also in presence of salts of some other metallic elements (Fe, Zn, Ca). Mercury adsorbed on such sorbents changes relatively quickly into non-toxic form of HgS. Leaching of zinc from the catalyst (Zn-diethyl-dithiocarbamate) contained in the vulcanized sorbents is negligible at neutral pH conditions and small (about 10 %) at acidic conditions (pH = 1.5).

Trvalý link: http://hdl.handle.net/11104/0331964