BIOSORPTION/DESORPTION OF CADMIUM(II) AND ZINC (II) FROM AQUEOUS SOLUTIONS BY ACTIVATED SLUDGE IMMOBILIZED ONTO CHITOSAN BEADS
Journal Title: Progress on Chemistry and Application of Chitin and its Derivatives - Year 2015, Vol 0, Issue
Abstract
In this study, we evaluated the effectiveness of cadmium and zinc adsorption and desorption from solutions containing single metals and a mixture of metals in the ratio of 1:2 by activated sludge immobilized onto chitosan (ASC). The optimal pH value determined for metals adsorption ranged from pH 5 to pH 6, whereas that established for desorption reached pH 2. In the case of individual metals, the state of adsorption equilibrium in the solution was achieved after 180 min, whereas in the case of a metal mixture – after 270 min. In the case of desorption, the state of equilibrium was achieved after 45 min. It was stated that both adsorption and desorption proceeded according to the pseudo-second order reaction. The study enabled determining the maximum adsorption capacity based on Langmuir, Freundlich and Sips models. The Sips model was found suitable for the description of adsorption of single metals onto ASC, whereas both Sips and Freundlich models – for description of the adsorption of a metal mixture, which was indicated by the determined values of R2 coefficient. The adsorption capacity of ASC determined from Sips model for individual solutions of cadmium and zinc reached 216 and 188.3 mg/g d.m., respectively, whereas that determined for their mixture reached 106 mg/g d.m. for both metals.
Authors and Affiliations
Małgorzata Kuczajowska-Zadrożna, Urszula Filipkowska, Tomasz Jóźwiak, Paula Szymczyk
Keywords
Related Articles
- EP ID EP73340
- DOI 10.15259/PCACD.20.13
- Views 100
- Downloads 0
BIOLOGICAL PROPERTIES OF THERMOSENSITIVE CHITOSAN GELS CONDITIONING IN WATER
In this paper the properties of thermosensitive chitosan hydrogels prepared with the use of chitosan salz (chloride and lactate) and -glycerophosphate are presented. Biological studies were carried out on thermogels wit...
PRELIMINARY STUDIES ON THE USABLE PROPERTIES OF INNOVATIVE WOUND DRESSINGS
There is endless and growing demand on a novel and innovative wound dressings, which except basic protective performance accelerate the process of wounds healing and/or replace the patient skin function. The studies on t...
PROTEIN DELIVERY BY NANOPARTICLES FORMED BY CHITOSAN-N-ACYL DERIVATIVES
Biodegradable nanoparticulated carriers have important potential applications for administration of therapeutic proteins and peptides. Chitosan based nanoparticles have attracted attention due to their biological propert...
THE EFFECT OF SELECTED POLYMERS ON THE PROPERTIES OF THERMOSENSITIVE HYDROPHILIC GELS CONTAINING LACTIC ACID COMPLEXED WITH CHITOSAN
Bacterial vaginitis affects women of all age groups. Numerous recurrences of the condition are widely discussed by clinicians. Traditional therapeutic schemes recommended by world treatment centres and health organizatio...
EFFECT OF A HYDROPHILISING SUBSTANCE ON THE VISCOSITY OF GYNAECOLOGICAL GELS CONTAINING LACTIC ACID COMPLEXED WITH CHITOSAN
Thus ensuring a continuous action of a drug also during daily activity time of a patient is a vital question in gynaecological treatment. The main problem in applied therapies is to maintain the continuity of treatment d...