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Improvement of efficiency of dye removal by immobilization of fungal biomass

Przystaś Wioletta, Zabłocka-Godlewska Ewa

Ecological Chemistry and Engineering. A

2020

Vol. 27, nr 1-2

1--11

One of the ways to increase the efficiency of the decolorization process is the immobilization of biomass. In order to improve the efficiency of the dyes removal, a set of tests were carried out. The immobilized mycelium of the following strains: Pleurotus ostreatus (BWPH), Hypholoma fasciculare (L3) and Pluteus sp. (RSW3) were used to remove dyes from different classes (azo, antraquinone and triphenylmethane dyes). Two types of carriers were used – natural and synthetic. It was shown that the immobilization of the mycelium on the carriers allowed for the complete decolorization but not for all dyes. It was noted that the efficiency of the process depended on the strain, dye and carrier used for immobilization. Strain RSW3 (immobilized on pistachio shell) and RWP17 (immobilized on sponge) removed completely the RBBR anthraquinone dye, and almost all Evans blue. In case of brilliant green almost all dye was removed by strain L3 immobilized on pistachio shell.

Decomposition of Anthraquinone Dye Acid Blue 62 by the Decoloration of Textile Wastewater by Advanced Oxidation Process

Perkowski J., Kos L., Ledakowicz S., Żyłła R.

Fibres & Textiles in Eastern Europe

2003

Vol. 11, no. 2 (41)

88--94

The results of the decomposition of anthraquinone dye Acid Blue 62 are discussed in the paper. Different versions of the advanced oxidation process were used for decoloration of the aqueous solution of this dye. Such agents as ozone, hydrogen peroxide, UV and gamma radiation, as well as various combinations of those factors, were applied. The effectiveness of the decoloration reaction induced by the different process versions was compared. In all those processes, the main oxidising species was hydroxyl radical. Therefore, using pulse radiolysis, the rate constant of the primary reaction of hydroxyl radical with the anthraquinone dye Acid Blue 62 molecule was determined. Based on the results obtained, a mechanism of the primary decomposition reactions was proposed.

Zbadano rozkład barwnika antrachinonowego Acid Blue 62. Do dekoloryzacji jego roztworów wodnych zastosowana różne wersje procesu pogłębionego utleniania i czynniki utleniające takie jak: ozon, nadtlenekwodoru, promieniowanie UV i gamma oraz różne ich kombinacje. Opierając się na uzyskanym stopniu dekoloryzacji roztworów, porównano efektywności różnych wersji procesu pogłębionego utleniania. We wszystkich zastosowanych procesach ważnym czynnikiem utleniającym jest rodnik hydroksylowy. Metodą radiolizy impulsowej wyznaczono stałą szybkości reakcji między rodnikiem a cząsteczką barwnika Acid Blue 62. Propozycje przebiegu tej reakcji oparto na danych z radiolizy impulsowej oraz wynikach odbarwiania roztworu w procesie inicjowanym rodnikami hydroksylowymi.