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Wpływ dodatku wybranych rodzajów wypełniaczy na właściwości sorpcyjne papieru

Pospiech Piotr, Łazorczyk Michał

Przegląd Papierniczy

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2022

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R. 78, nr 12

693--698

PL

W pracy zbadano efektywność adsorpcji barwnika (zieleni malachitowej) z roztworu wodnego na gotowych, wykonanych laboratoryjnie papierach, zawierających różnego rodzaju wypełniacze. W badaniach zastosowano typowe wypełniacze używane w papiernictwie oraz mikrocząstki siloksanowe niewykorzystywane do tej pory w technologii papieru. Określono również zależność stopnia adsorpcji, intensywności wybarwienia i przebiegu procesu wnikania wody w strukturę badanych papierów w zależności od ilości zastosowanych wypełniaczy.

EN

The study examined the effectiveness of dye adsorption (malachite green) from an aqueous solution on the laboratory made sheets containing various types of fillers. Typical fillers applied in papermaking and siloxane microparticles, previously unexploited in paper technology, were used in the research. The dependence of the efficacy of adsorption, the intensity of dyeing and the way of the process of water penetration into the structure of the tested papers, depending on the amount of fillers used, was also determined.

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Post-coagulation sludge as an adsorbent of dyes from aqueous solutions

Pieczykolan Barbara, Płonka Izabela

Ecological Chemistry and Engineering. S

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2019

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Vol. 26, nr 3

509--520

EN

The main source of usable water supply in Poland is surface water. The most frequently used methods of surface water treatment are coagulation and filtration processes. During these processes post-coagulation sludge is generated, which is the main waste produced in water treatment plants. This sludge is characterized by an amorphous structure with a strongly developed specific surface, similar to sewage sludge. Dried and crushed post-coagulation sludge was used in the studies as an adsorbent of two acid dyes: Acid Red 18 (AR 18) and Acid Green 16 (AG 16). The most favourable pH of process and contact time as well as sorption isotherm were established. For both dyes the most favourable pH value was equal 2. The tests showed that in the case of AR 18 (180 min) a longer contact time was necessary to reach the equilibrium than for AG 16 (120 min). Moreover, based on the different isotherm two-parameter models, the sorption capacity, type of sorption and energy of sorption were calculated based on linear and non-linear regression. The tests showed that in the case of dye AG 16 monolayer sorption occurred - the analysis showed better fitting the results to Langmuir model. Moreover, for both dyes, physical adsorption took place - it was indicated by the values of parameter 1/n (computed from the Freundlich model).

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Modified silicas - adsorbents for decontamination of waste solutions from production of organic dyes

Andrzejewska A., Krysztafkiewicz A., Jesionowski T.

Polish Journal of Chemical Technology

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2004

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Vol. 6, nr 2

1-3

EN

Studies were performed on cleaning the solutions contaminated with organic dyes. Silica modified with the aminosilane coupling agent was used for the adsorption of the dyes. The procedure was followed by the estimation of the extent to which the dye was removed from the contaminated solution. In the obtained pigments, the particle size distribution, the tendency to form agglomerates as well as the particle surface morphology, were examined using the SEM and DLS techniques.