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Journal of Thermal Analysis and Calorimetry
Authors:
V. Sydorchuk
,
W. Janusz
,
S. Khalameida
,
E. Skwarek
,
J. Skubiszewska-Zięba
,
R. Leboda
, and
V. Zazhigalov

characterized by larger specific surface area and sufficiently large content of micropores which impairs its kinetic characteristics and reduces the efficiency of its application in sorption and catalysis. To overcome these drawbacks several ways have

Open access

water and T g is fundamental for the evaluation of agglomeration–stickiness ability of the coating agent, the design of drying methods as well as the selection of adequate storage conditions for the coated particles. In this context, the sorption

Open access

Physics , 2002 Sept 26–30, Dresden, Germany, pp. 103 – 112 . [2] Lakatos Á. , Kalmár F. ( 2013 ), Analysis of water sorption and thermal

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Acta Chromatographica
Authors:
Francielle Q. Soares
,
Bruna F. Alvarenga
,
Marçal A. Ruggiero
,
Monise C. Casanova
,
Eliana M. Lima
,
Denilson Rabelo
, and
Andréa R. Chaves

Spectral Imaging (Peabody, MA, USA). Nitrogen Adsorption Measurements The specific surface area and pore size distribution measurements were performed using a Micrometrics ASAP 2010 nitrogen sorption porosimeter. Analysis

Open access

SBA-15 silicas containing sucrose

Chemical, structural, and thermal studies

Journal of Thermal Analysis and Calorimetry
Authors:
M. Barczak
,
M. Oszust-Cieniuch
,
P. Borowski
,
Z. Fekner
, and
E. Zięba

70 °C. Characterization XRD patterns were recorded using a Seifert RTG DRON-3 diffractometer (CuKα radiation) with 0.02º step and 10 s time step over a range of 0.5º < 2θ < 5.0º at RT. Nitrogen sorption isotherms

Open access

4 , are good candidates for magnetic carrier technology considering the following main advantages: (1) MNPs can be produced in large quantity using a simple method, (2) it can be expected that their sorption capacity is high due to their large

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Thermal transformation of polyacrylonitrile deposited on SBA-15 type silica

Effect on adsorption capacity of methyl–ethyl ketone vapor

Journal of Thermal Analysis and Calorimetry
Authors:
Rafał Janus
,
Piotr Natkański
,
Anna Wach
,
Marek Drozdek
,
Zofia Piwowarska
,
Pegie Cool
, and
Piotr Kuśtrowski

recorded during MEK desorption for the calculation of the real sorption capacity of the PAN/SBA-15 composites. Results and discussion SBA-15 characterization The structural and textural properties of

Open access
Journal of Thermal Analysis and Calorimetry
Authors:
Dariusz Szychowski
,
Barbara Pacewska
,
Grzegorz Makomaski
,
Janusz Zieliński
,
Wiesława Ciesińska
, and
Tatiana Brzozowska

decomposition temperatures of carbonizates produced from pitch–polymer compositions and the evaluation of their sorption abilities. The additive of poly(ethylene terephthalate) and phenol–formaldehyde resin caused the increase of thermal resistance of the pitch

Open access

apple pomace (5 mg mL −1 ) were then loaded into the column and the sorption flow rate was set to 2 Bed volume per hour. Rinse and desorption flow rates were also set to be 2 Bed volume per hour. Distilled water was used as the rinse solvent while 96

Open access

Abstract  

PET with 68Ga from the TiO2- or SnO2- based 68Ge/68Ga generators is of increasing interest for PET imaging in nuclear medicine. In general, radionuclidic purity (68Ge vs. 68Ga activity) of the eluate of these generators varies between 0.01 and 0.001%. Liquid waste containing low amounts of 68Ge activity is produced by eluting the 68Ge/68Ga generators and residues from PET chemistry. Since clearance level of 68Ge activity in waste may not exceed 10 Bq/g, as stated by European Directive 96/29/EURATOM, our purpose was to reduce 68Ge activity in solution from >10 kBq/g to <10 Bq/g; which implies the solution can be discarded as regular waste. Most efficient method to reduce the 68Ge activity is by sorption of TiO2 or Fe2O3 and subsequent centrifugation. The required 10 Bq per mL level of 68Ge activity in waste was reached by Fe2O3 logarithmically, whereas with TiO2 asymptotically. The procedure with Fe2O3 eliminates ≥90% of the 68Ge activity per treatment. Eventually, to simplify the processing a recirculation system was used to investigate 68Ge activity sorption on TiO2, Fe2O3 or Zeolite. Zeolite was introduced for its high sorption at low pH, therefore 68Ge activity containing waste could directly be used without further interventions. 68Ge activity containing liquid waste at different HCl concentrations (0.05–1.0 M HCl), was recirculated at 1 mL/min. With Zeolite in the recirculation system, 68Ge activity showed highest sorption.

Open access