Anđelka Đukić

Sorption and desorption of pertechnetate on biochar under static batch and dynamic conditions

The objective of this study was the utilization of three different biochars for pertechnetate removal from aqueous solutions. Biochars were prepared by slow pyrolysis from different feedstocks, characterized by BET, acid–base titration, SEM, XRD and FTIR and tested for their pertechnetate sorption using batch and dynamic techniques. Effect of various physico-chemical parameters such as contact time, pH and the presence of different ions in the solution on the sorption of pertechnetate onto biochars was investigated. Perrhenate as an analogue of pertechnetate was used for modeling of adsorption isotherms.

Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions

Natural clinoptilolite modified with a cationic surfactant stearyldimethylbenzylammonium chloride (SDBAC) was used as an adsorbent for the removal of pertechnetate from aqueous solutions. Adsorption studies were performed in a batch system. The effects of various experimental parameters (amount of surfactant loading, contact time, solution pH, competing anions) on the removal efficiency of TcO4− were investigated. SDBAC-clinoptilolite with organo-bilayer was successfully used to remove TcO4− from aqueous solutions in the pH range of 5.0-8.0. ReO4− as an analogue of TcO4− was used to model the isotherms. Adsorption capacity of the SDBAC-clinoptilolite and the mechanism of ReO4− (TcO4−) sorption were also determined.

Removal of pertechnetate from aqueous solution using activated pyrolytic rubber char

Low-cost adsorbents, synthesized by pyrolysis of waste rubber (CR) and activated with KOH (CRA), have shown the high removal ability of

Simultaneous Removal of Divalent Heavy Metals from Aqueous Solutions Using Raw and Mechanochemically Treated Interstratified Montmorillonite/Kaolinite Clay

{}^{{99{\text{m}}}}{\text{TcO}}_{4}^{ - }

Influence of ageing of milled clay and its composite with TiO2 on the heavy metal adsorption characteristics

99mTcO4- from aqueous solutions in wide range of pHs (2–10) with fast adsorption rate. The Langmuir and Freundlich models suggests monolayer and multilayer adsorption of

Complex investigation of charge storage behavior of microporous carbon synthesized by zeolite template

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