Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 15

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  biosorption
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Supporting the process of removing humic substances on activated carbon

100%
Olesiak P., Stępniak L.
|
2014
|
vol. 61
|
issue 4
711-716
EN
This study is focused on biosorption process used in water treatment. The process has a number of advantages and a lot of research has been done into its intensification by means of ultrasonic modification of solutions. The study carried out by the authors leads to the conclusion that sonication of organic solutions allows for extension of the time of operation of carbon beds. For the analysis of the results obtained during the sorption of humic substances (HS) from the solution dependencies UV/UV0 or DOC/DOC0 were used. In comparative studies the effectiveness of sorption and sonosorption (UV/UV0) shows that the share of ultrasounds (US) is beneficial for extension of time deposit, both at a flow rate HS solution equal to 1 m/h and 5 m/h. Analysis of the US impact sorption on HS sorption in a biological fluidized bed, both prepared from biopreparat and the activated sludge confirms the higher efficiency compared to sonobiosorption than biosorption. These results confirm the degree of reduction UV254/UV0 and DOC/DOC0 for the same processes. EMS index also confirms the improvement of HSbiodegradation by sludge microorganisms.
2
Content available remote

Multi-cation biosorption bychlorella kessleri

100%
Saeid A., Chojnacka K.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
This paper discusses the biosorption in a multi-cation system as an example of advances in the method of ions removal/binding to the biomass. Biosorption experiments were conducted on Chlorella kessleri biomass. The ions used in the experiment were Co(II), Cu(II), Mn(II) and Zn(II) and had the following configurations: binary, ternary and quaternary system. Also, the effect of the following anions Cl-, NO3-, SO42- on the biosorption process in the quaternary system (initial concentration of each ion was 0−300 mg L-1) was examined. The affinity order determined in the experiment was as follows: Cu(II)>Zn(II)>Mn(II)>Co(II). At higher concentrations of Cu(II) cations, the strong competition effect between Cu(II) cations with the remaining cations was observed. The modified Langumir competition model was proposed to support the biosorption method in the description of the experimental data of inhibited metal ions biosorption. After the influence of anions was examined, the highest total biosorption capacity was obtained for 1:1:2 system (Cl-: NO3- : SO42-).
3
Content available remote

Removal of 60Co2+ and 137Cs+ ions from low radioactive solutions using Azolla caroliniana willd. water fern

100%
Popa K., Cecal A., Humelnicu D., Caraus I., Draghici C.
Open Chemistry
|
2004
|
vol. 2
|
issue 3
434-445
EN
This study concerns the removal of the 137Cs+ and 60Co2+ β+γ-radioactive ions in Azolla caroliniana Willd. water fern. The living fern and two different types of biosorbent prepared from Azolla caroliniana were tested to remove the above-mentioned radioactive ions from dilute solutions, in the absence and in the presence of the ionic competition. Effective 137Cs+ and 60Co2+ ions removal from low radioactive wastewaters was demonstrated. The time dependent K d(t) values were calculated from the absorption data. These results indicate that removal process achieved equilibrium in about 120 min and that it involves two steps: rapid and slow absorption; the active process (metabolic bioaccumulation on the living fern) was responsible for above one half of the total removal process. A thin layer radiochromatography study leads to the conclusion that the biochemical components in which 137Cs+ and 60Co2+ place themselves are of a polysaccharide and lipoid fractions.
4
Content available remote

Biosorption of lead(II), zinc(II) and nickel(II) from industrial wastewater by Stenotrophomonas maltophilia and Bacillus subtilis

100%
Wierzba S.
|
EN
The biosorption of Pb(II), Zn(II) and Ni(II) from industrial wastewater using Stenotrophomonas maltophilia and Bacillus subtilis was investigated under various experimental conditions regarding pH, metal concentration and contact time. The optimum pH values for the biosorption of the three metals were in the range 5.0-6.0, while the optimal contact time for the two bacterial species was 30 min. Experimental data was analyzed using Langmuir and Freundlich isotherms; the former had a better fit for the biosorption of Pb(II), Zn(II) and Ni(II). The maximum adsorption uptakes (qmax) of the three metals calculated from the Langmuir biosorption equation for S. maltophilia were 133.3, 47.8 and 54.3 for Pb(II), Zn(II) and Ni(II), respectively, and for B. subtilis were 166.7, 49.7 and 57.8 mg/g, respectively. B. subtilis biomass was more favorable for the biosorption of Pb (II) and Ni (II), while S. maltophilia was more useful for the biosorption of Zn (II).
5
Content available remote

Biosorption lead(II) and nikel(II) from an aqueous solution by bacterial biomass

88%
Wierzba S., Latała A.
|
|
vol. 12
|
issue 3
72-78
EN
The optimum conditions for biosorption of Pb(II) and Ni(II) from aqueous solution were investigated, by using living and nonliving Pseudomonas fluorescens and Bacillus pumilus isolated from wastewater treatment plant. It was found that the optimum pH for Pb(II) removal by living and nonliving cells was 6.0, while 7.0 for Ni(II) removal. At the optimal conditions, metal ion biosorption was increased as the initial metal concentration increased. The binding capacity by living cells is significantly higher than that of nonliving cells at tested conditions. The maximum biosorption capacities for lead and nickel by using Ps. fluo-rescens and B. pumilus were 77.6, 91.4 and 65.1, 73.9 mg/g, respectively. The results of bio-sorption time and desorption experiments suggested that Pb(II) and Ni(II) uptake by the living bacterial biomass might be enhanced by intracellular accumulation.
6
Content available remote

Removal of phenol from wastewater using activated waste tea leaves

88%
Kazmi M., Saleemi A. R., Feroze N., Yaqoob A., Ahmad S. W.
Polish Journal of Chemical Technology
|
2013
|
vol. 15
|
issue 2
1-6
EN
This investigation enumerates the treatment of phenol contaminated synthetic wastewater by Activated Waste Tea Leaves (AWTL). Phosphoric acid was used for the modification of waste tea leaves. The effects of initial pH, biosorbent dose, contact time, and initial phenol concentration were studied on the phenol uptake from the synthetic solution. Kinetic modelling was performed using pseudo 1st and 2nd order kinetics. The Langmuir and Freundlich’s Models were employed to interpret the AWTL behaviour at various mass transfer gradients. The results show that the optimum values for pH, biosorbent dose and contact time were 2.2 g/L and 180 minutes, respectively. Pseudo 2nd order kinetic and the Langmuir’s Models best described the kinetic and equilibrium behaviours, respectively.
7
Content available remote

Biofortification of maize grains with micronutrients by enriched biomass of blackcurrant seeds

88%
Samoraj M., Tuhy Ł., Baśladyńska S., Chojnacka K.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
Effect of the application of blackcurrant seed post-extraction residues (BS) enriched via biosorption with Zn(II), Mn(II) and Cu(II) was examined in field tests on maize. As a nominal dose (100%), 2.5 kg of zinc, 1 kg of manganese and 0.5 kg of copper per hectare, were applied. The preparation was applied, also, in higher doses (150%, 200%). Crop yield and quality were assessed and multielemental analysis of grains was conducted. Grain yield obtained for maize treated with different doses of micronutrients (7.3 and 7.2 Mg ha-1 for BS 100% and BS 200%, respectively) was higher than in control group (6.2 Mg ha-1) and similar to a commercial reference product (7.1 Mg ha-1). Bioavailability of micronutrients from BS was shown to be higher than from reference commercial fertilizer. The highest content of micronutrients delivered to plants was observed for groups fertilized with BS in nominal dose of micronutrients (1.79, 7.08 and 28.55 mg kg-1 for Cu, Mn and Zn, respectively). The content of each micronutrient was 5.6% (Cu) 12.1% (Mn) and 12.6% (Zn) higher than in untreated group and 8.9% (Cu) 9.7% (Mn) and 8.7% (Zn) higher than commercial reference micronutrient fertilizer. New biocomponents are cheap and biodegradable carriers of nutrients which can be released in controlled way.
8
Content available remote

Biomass of freshwater Cladophora as a raw material for agriculture and the cosmetic industry

88%
Messyasz B., Leska B., Fabrowska J., Pikosz M., Roj E., Cieslak A., Schroeder G.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
This study was undertaken to determine mineral content, amino acid and fatty acid composition of the freshwater macroalga – Cladophora glomerata. The studies were based on the content comparison in algal biomass collected from a lake and cultured in a laboratory. To determine the ability of copper cumulating by macroalgae, Cladophora was cultured in the medium supplemented with Cu ions. This study indicated that the relative abundance of metals in filaments decreased in the following order: Ca > K > Mg > Na > Fe > Cu > Zn > Pb > As > Ni > Cd > Mn > Cr > Co. Total protein content ranged from 14.45% in Cladophora from a lake to 26.55% in Cladophora from a laboratory. The main amino acids analyzed were aspartic and glutamic acid. The fatty acid content in the dry matter of the extract varied depending on the extraction method used: ethylene alcohol (19.0%), acetone (34.5%) or supercritical fluid extraction (62.5%). Freshwater C. glomerata due to the macrominerals, trace elements, amino and fatty acids composition in the extracts can be a valuable resource for nutritional and cosmetic applications.
9
Content available remote

New feed supplement from macroalgae as the dietary source of microelements for pigs

88%
Michalak I., Chojnacka K., Korniewicz D.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
The aim of the study was to perform feeding experiments on growing pigs in order to assess the impact of macroalga Enteromorpha sp. enriched with Zn(II) and Cu(II) ions via the biosorption process on the mineral composition of blood, meat, liver, feces and urine. In the control group, microelements were supplemented as inorganic salts, whereas in the experimental groups they were replaced by enriched macroalga. After 3 months of the feeding experiment, it was found that the meat was biofortified with Cr, Mn, Fe, Cu and Zn. The average content of Zn in the blood from the pigs fed with algae was higher by 9.5%, compared to that in the blood from pigs in the control group. The liver of growing pigs from the experimental group contained 16% less Cu and 18% less Zn than the liver in the control group. Growing pigs fed with macroalgae excreted in feces 27% more Zn than growing pigs in the control group, but 3.5 times less Cu. It could be concluded that the bioavailability of microelements to pigs from algae was higher than from the inorganic salts. Baltic macroalgae enriched with microelement ions could be potentially used as a biological feed additive.
10
Content available remote

Characterization and sorption properties of Aspergillus niger waste biomass

88%
Ŝpanêlová M., Machoviĉ V., Březina M.
Open Chemistry
|
2003
|
vol. 1
|
issue 3
192-200
EN
The structure and the biosorption properties of fungal biomass of Aspergillus niger originated from citric acid fermentation industry was investigated. This waste biomass, produced in high quantity in carefully controlled industrial processes, has certain favourable characteristics that may be improved for its usefulness. In environmental chemistry, it is known for the removal of heavy metals cations. In this work, different alkaline treatments (1M NaOH/20°C/24 h and 10M NaOH/107°C/6 h) were used to evaluate the dependence of sorption properties of biomass on the cell wall composition. The biosorption was studied by the batch method, with the biomass concentration of 1 g/l, at pH 6. The adsorption of lead was more effective than that of cadmium. The biosorption capacity was evaluated using the biosorption isotherm derived from the equilibrium data. At pH 6, the maximmum lead biosorption capacity estimated with the Langmuir model was 93 mg/g dry biomass.
11
Content available remote

Biosorption of aniline blue from aqueous solution using a novel biosorbentZizyphus oenopliaseeds: Modeling studies

88%
Kumar M., Elangovan G., Tamilarasan R., Vijayakumar G., Mukeshkumar P. C., Sendhilnathan S.
|
EN
This article presents the feasibility for the removal of Aniline Blue dye (AB dye) from aqueous solution using a low cost biosorbent material Zizyphus oenoplia seeds. In this study, a batch mode experiments of the adsorption process were carried out as a function of pH, contact time, concentration of dye, adsorbent dosage and temperature. The experimental data were fitted with Freundlich and Langmuir isotherm equations. The feasibility of the isotherm was evaluated with dimensionless separation factor (RL). The kinetic data of sorption process are evaluated by using pseudo-first order and pseudo-second order equations. The mode of diffusion process was evaluated with intra-particle diffusion model. The thermodynamic parameters like change in enthalpy (ΔHº); change in entropy (ΔSº) and Gibbs free energy change (ΔGº) were calculated using Van’t Hoff plot. The biosorbent material was characterized with Fourier Transform Infrared (FTIR) spectroscopy and the morphology was identified with Scanning Electron Microscope (SEM) in before and after adsorption of AB dye.
12
Content available remote

Innovative bio-products for agriculture

75%
Chojnacka K.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
The paper reports state of the art research in the field of novel bio-based products for agriculture. Biopesticides, biostimulants and biofertilizers were shown as a potential alternative or additional products to the currently used agrochemicals. The present situation on the market of agrochemicals was discussed. Difficulties related to products registration were taken into account. Research on supercritical algal extracts as a biostimulant of plant growth and health supporting feed additive for laying hens was presented, as well as the perspectives of the use of biomass as the carrier of fertilizer nutrients. The method of production of new fertilizer components with micronutrients was biosorption. The concept of new phosphorus biofertilizers containing living microflora that solubilizes phosphorus was reported.
13
Publication available in full text mode
Content available

CHITOSAN MICROSPHERES PREPARED BY MEMBRANE EMULSIFICATION FOR CHROMIUM REMOVAL FROM AQUEOUS SOLUTIONS

75%
Wolska J.
Progress on Chemistry and Application of Chitin and its Derivatives
|
2016
|
vol. 21
203-216
EN
Chitosan is naturally abundant biopolymer that could be used as chelating sorbent for removal of metal ions from aqueous solutions. In this study the uniform-sized chitosan microspheres and their modified derivatives were prepared by using the one stage membrane emulsification process. The obtained sorbents were used for removal of chromium VI ions. The sorption evaluation was carried out at different initial ion concentrations and allowed to fit the experimental data to Langmuir isotherm in the case of unmodified materials and to Freundlich isotherm in the case of modified microspheres. The highest sorption towards chromium has been shown by unmodified chitosan with medium molecular weight. The calculated maximum sorption capacity for this polymer was found to be 1.6 mmol/g.
14
Publication available in full text mode
Content available

Biosorption of Pb(II) by the resistant Enterobacter sp.: Investigated by kinetics, equilibriumand thermodynamics

71%
Liu L., Xia M., Hao J., Xu H., Song W., Liu L., Xia M., Hao J., Xu H., Song W.
Archives of Environmental Protection
|
2021
15
Content available remote

Translocation of Cations During Sorption of Copper in the System Solution - Algae (Spirogyra sp.)/Translokacja Kationów Podczas Procesu Sorpcji Miedzi W Układzie Roztwór - Glony (Spirogyra Sp.)

63%
Rajfur M., Kłos A., Kříž J.
Ecological Chemistry and Engineering S
|
2014
|
vol. 21
|
issue 3
425-433
EN
Kinetics of the sorption of copper cations in Spirogyra sp. algae was analysed, together with the accompanying processes of hydrogen cations sorption and releasing to the solution the cations bonded in the algae: Na+, Mg2+, K+ and Ca2+. It was established that, in a static system, at the fixed proportion of algae mass to the solution volume, these processes occur simultaneously, however presumably the quantity of the released salts influences the parameters of heterophase equilibrium of ion exchange. In the experiment conditions, the quantity of the released cations was nearly 10 times larger than the quantity of the sorbed cations. The equilibrium parameters, determined from the model of pseudo second order reaction, were compared with the parameters obtained after 30 min of the process duration, ie at relatively stable indications of measuring equipment. On the example of the sorbed copper, the difference is approximately 8%. It was confirmed that the solution conductivity is a good parameter for the estimation of the state close to equilibrium.
PL
Zbadano kinetykę procesu sorpcji kationów miedzi w glonach Spirogyra sp. oraz towarzyszące mu procesy sorpcji kationów wodorowych i procesy uwalniania do roztworu kationów związanych w glonach: Na+, Mg2+, K+ i Ca2+. Stwierdzono, że w układzie statycznym, przy stałym stosunku masy glonów do objętości roztworu, procesy te zachodzą równocześnie, przy czym należy przypuszczać, że ilość uwalnianych soli ma wpływ na parametry heterofazowej równowagi wymiany jonowej. W warunkach prowadzenia eksperymentu ilość uwolnionych kationów była blisko 10-krotnie większa niż ilość kationów sorbowanych. Porównano parametry równowagi wyznaczone z modelu reakcji pseudo-drugiego rzędu z parametrami uzyskanymi po 30 min trwania procesu, to jest przy względnie stałych wskazaniach przyrządów pomiarowych. Różnica na przykładzie sorbowanej miedzi wynosi ok. 8%. Stwierdzono, że dobrym parametrem do szacowania stanu bliskiemu stanowi równowagi jest konduktywność roztworu.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.