Registration Number
0221U106640,
0121U113743
, R & D reports
Title
Creation of new organo-inorganic hybrid materials as sorbents for wastewater treatment from heavy metal ions
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Head
Dudarko Oksana A., Кандидат хімічних наук
Registration Date
16-12-2021
Organization
Chuiko Institute of Surface Chemistry of NAS of Ukraine
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Using the template method, chelating and ion-exchange N-containing groups were introduced into the structure of mesoporous silica SBA-15 for selective adsorption and removal of heavy metal ions. The composition, properties and structure of synthesized organosilicons were established by physicochemical and structural adsorption methods. The obtained materials had the advantages of mesoporous silica SBA-15 with its developed and ordered surface area (700-745 m2 / g) with a content of functional ligand ranging from 0.1 to 0.95 mmol / g. The synthesized silica series were investigated for the extraction of Cr (III), Mn (III), Pb (II), Cd (II) and Cu (II) from model aqueous solutions. The adsorption of target ions increases with increasing pH and their concentration solution. Equilibrium adsorption data are consistent with the Langmuir isotherm model and the maximum monolayer, and the sorption capacity of cations Pb (II), Cd (II), Cr (III) and Mn (II) was 185.6 mg / g, 111.2 mg / g, 57.7 mg / g and 49.4 mg / g, respectively. The chelating interaction was considered as the main mechanism of adsorption of metal ions (Cr (III), Mn (II), Pb (II), Cd (II) and Cu (II)). The adsorption capacity of the SBA-TASAM and SBA-TASAM / NH2 samples for the studied metal ions corresponded to Lewis's theory of hard and soft acids and bases. The efficiency of removal of metal cations by adsorbents was about 96-92% during the three cycles of regeneration. All these results confirmed that the obtained N-functionalized silica is promising for use in ecology and analytics.
Product Description
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Klymchuk Dmytro O
Kobylinska Natalia H.
Melnyk Inna V
Stolyarchuk Nataliya V.
Tomina Veronika V.
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2021-12-16
