Nanocomposites and nanomaterials

Amino modified silica particles for efficient complex water treatment from Сu(II), Eu(III), and dyes
Tomina V.V.1, Stolyarchuk N.V.1, Vaclavikova M.2, Melnyk I.V.1,2
1 Chuiko Institute of Surface Chemistry of NAS of Ukraine, General Naumov 17, Kyiv-03164, Ukraine.
E-mail: w.w.tomina@gmail.com
2 Institute of Geotechnics of SAS, Watsonova 45, Kosice-04001, Slovak Republic.

Anthropogenic pollutants rank high among the factors affecting the quality of water reservoirs [1]; therefore, the search for the novel materials for water depollution from the results of human activity is an urgent task. In the current research we aimed to synthesize sorbents featuring silica spheres with amino groups via the one-pot modified Stober method and study their adsorption properties to ions of copper(II), europium(III), and some organic dyes such as Methylene Blue (MB), Acid Red 88 (AR), and Fluorescein (Fl) (Table 1).

Table 1. Sorption capacities of the samples (mg/g)
Sample	MB	AR	Fl	Cu(II)	Eu(III)	
SiO2/-(CH2)3NH2/-Ph	113	141	132	120.7	35.0	
SiO2/≡Si-(CH2)3-NH-(CH2)3-Si≡	85	201	132	165.1	101.8	
≡Si-C6H4-Si≡/-(CH2)3NH2	146	262	46	146.1	82.1	
≡Si-C2H4-Si≡/-(CH2)3NH2	114	161	75	201.6	158.1	
The uniqueness of the obtained materials is that they combine on the surface hydrophilic (-NH2, -OH) and hydrophobic (phenyl, ethyl) groups, basic (amino) and acidic (silanol) groups, complex-forming (amino) and ion-exchange (silanol) groups; thus, they can be used to solve a complex of water treatment problems [2].
The research is financed from VEGA 2/0156/19 and H2020-MSCA-RISE-2016-NANOMED project No 734641.

1.	Khatri N., Tyagi S. Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas // Front. Life Sci.-2015.-8, N 1.-P. 23-39.
2.	Tomina V.V., et al. Surface and structure design of aminosilica nanoparticles for multifunctional applications: adsorption and antimicrobial studies // Biocompatible Hybrid Oxide Nanoparticles for Human Health: From Synthesis to Applications (ISBN 9780128158753).- Elsevier, 2019.-P. 15-31