Influence of Preparation Method of Spirogyra Sp. Algae on their Sorption Capacity

• Authors: Małgorzata Rajfur
• Languages of publication: EN

Abstracts

EN

The influence of the preparation method of samples on the zinc ions sorption parameters in Spirogyra sp. algae was analysed. The Zn2+ sorption process from the salt solutions of this analyte was carried out in static conditions. The carried out analyses results show that the method of algae samples preparation for analyses (thermal drying, freeze drying, samples conditioning in demineralised water) and storage period influence their sorption capacity. On the basis of the carried out research of the metal sorption kinetics in live and prepared algae samples, it was found that the equilibrium is achieved after approximately 30 min. In the experiment conditions, 56% of metals are sorbed in live algae during the first 15 min. Approximately 17 and 65% of zinc ions present in the dilution accumulated in thermally dried and freeze dried algae samples respectively after 30 min of the process. It was confirmed that conditioning of the algae samples in demineralised water, prior to the sorption process, increases its efficiency. In order to define sorption capacity of freeze dried Spirogyra sp. algae, the Langmuir isotherm model was applied. It was found out that algae absorb heavy metals in proportion to their content in a solution, in which they were immersed. The sorption capacity of freeze dried Spirogyra sp. algae and zinc, defined with the use of the Langmuir isotherm, shows considerable imprecise result. Evident influence of hydrogen cations on zinc concentrations in algae and in the solution in the state of equilibrium was found out.

PL

Zbadano wpływ sposobu preparowania próbek na parametry sorpcji jonów cynku na glonach Spirogyra sp. Proces sorpcji Zn2+ z roztworów soli tego analitu prowadzono w warunkach statycznych. Wyniki z przeprowadzonych badań wskazują, że sposób przygotowania próbek glonów do analiz (suszenie termiczne, liofilizacja, kondycjonowanie próbek w wodzie zdemineralizowanej) oraz czas przechowywania ma wpływ na ich pojemność sorpcyjną. Na podstawie przeprowadzonych badań kinetyki sorpcji tego metalu na żywych i preparowanych próbkach glonów stwierdzono, że stan równowagi zostaje osiągnięty po około 30 minutach. W warunkach prowadzenia eksperymentu 56% metali sorbowanych jest na glonach żywych w pierwszych 15 minutach. W próbkach glonów suszonych termicznie i liofilizowanych po 30 minutach trwania procesu zakumulowało się odpowiednio około 17 i 65% jonów cynku obecnych w roztworze. Stwierdzono, że kondycjonowanie próbek glonów przed procesem sorpcji w wodzie zdemineralizowanej podnosi jego wydajność. W celu wyznaczenia pojemności sorpcyjnej liofilizowanych glonów Spirogyra sp. zastosowano model izotermy Langmuira. Stwierdzono, że glony sorbują metale ciężkie proporcjonalnie do ich zawartości w roztworze, w którym zostały zanurzone. Wyznaczona z izotermy Langmuira pojemność sorpcyjna liofilizowanych glonów Spirogyra sp. względem cynku jest obarczona dużą niepewnością pomiarów. Stwierdzono wyraźny wpływ kationów wodorowych na stężenia miedzi w glonach i w roztworze w stanie równowagi.

Keywords

EN

zinc; the algae Spirogyra sp.; preparation of the algae; the Langmuir isotherm model; sorption capacity

PL

cynk; glony Spirogyra sp.; glony preparowane; kinetyka sorpcji; model izotermy Langmuira; pojemność sorpcyjna

• Publisher: De Gruyter Open
• Journal: Ecological Chemistry and Engineering S
• Year: 2013
• Volume: 20
• Issue: 3
• Pages: 475-488

Dates

published

1 - 09 - 2013

online

08 - 10 - 2013

Contributors

author

Małgorzata Rajfur

• Chair of Biotechnology and Molecular Biology, Opole University, ul. kard. B. Kominka 6, 45-032 Opole, Poland

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Identifiers

DOI

10.2478/eces-2013-0035