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Secondments from UGTSAV

Olha Semeshko, ESR (0.7 month) – PULSAR LLC

Claudia Cicakova, ESR (0.5 month) – ANAMAD Limited

Formally, 1 month visitor Dr.Oksana Arkhypenko from Pulsar LLC

I.Melnyk, O.Makota + University of Alicante (TiO2-contatinig composites for photodegradation of ciprofloxacin)
V.Kyshkarova, I.Melnyk, C.Cicakova, D.Kupka + Environcentrum + Moldova Chemistry Institute (study texture and composition of activated biochar and adsorption of organic pollutants from real waste water )
C.Cicakova, D.Kupka + Anamad (comparing degradation efficiency of dyes using cold plasma and electrochemical techniques)
V.Kyshkarova, I.Melnyk, M.Vaclavikova + Technologika (preparation of silica/pectin composites for Sb (VI) removal)
V.Kyshkarova, I.Melnyk + Budapest University + Anamad (adsorption study of carbamazepine and Bisphenol A using different time treated GAC by cold plasma)
O.Semeshko, V.Kyshkarova, I.Melnyk + Pulsar LLC (investigation of feature for wood vine biochar treated by cold plasma for adsorption of inorganic and organic pollutants)

Secondments to UGTSAV

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Results

WP1. Synthesis and characterisation of adsorbents

WP4. Evaluation of the adsorption performance

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Results

Sample	O, mass%	N, mass%	C, mass%	H, mass%	S_sp, m²/g	IEP
APB-300-600	35.2	0.7	61.9	2.2	0.1	2.12
APB-700	36.6	0.7	60.4	2.3	2.0	1.81

Photographs of the APB-300-600 and APB-700 samples during the transformation process

Table 1. Composition and some properties of the biochar samples obtained from apple pomace

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TEM (a–c) and SEM (d) images of apple pomace biochar obtained at 700 °C (APB-700)

X-ray diffraction (XRD) patterns of apple pomace biochars prepared by stepwise

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FTIR spectra of apple pomace biochars

Functional groups	Groups concentration, mmol/g
Functional groups	APB-300-600	APB-700
Carboxylic	0.593	0.5896
Lactonic	0.0153	0.0276
Phenolic	0.7007	0.6878
Total acidity (T_a)	1.309	1.305
Total basicity (T_b)	0.106	0.0996

Table 2. Data on the number of functional groups determined by Böhm titration

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Adsorption isotherms of Co(II) on apple pomace biochars APB-300-600 and APB-700

H₂	Light HC	CO	CO₂	Methane	Ethane	Propane	Butane		Pentane		Isobutane	Isopentane	Butene		Methanol	Ethanol
Non-catalytic process
0.53	21.79	19.48	16.53	4.17	12.25	19.10	5.09	0.36		-		0.36	0.33	0.01		-
APB-700+Co(II) catalyst
0.89	6.760	2.316	4.956	6.418	26.28	40.02	11.42		-	0.101		0.830	-	0.031		0.017

Table 3. Chromatographic analysis of pyrolysis products during HDPE decomposition

Polymer	m, g/%	m(cat.), g/%	m(prod.), g/%	m(resid.+cat.), g/%	Gas, %	Losses, %
HDPE	500/100	-	391.93/78.39	62.88/12.58	5.03	4.0
HDPE+cat.	100/100	2.5/2.5	82.35/82.35	9.74/9.74	6.9	1.01

Table 4. Material balance of low-temperature pyrolysis of high-density polyethylene

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Publications

Submitted articles

I.Melnyk, M.Vaclavikova, N.Prybora. Pristine Biochar in Water Treatment: A Scientometric Review of Mechanisms and Sustainability
N. Prybora, A. Skrypka, B. Korinenko, M. Baran, N. Stoliarchuk, I. Melnyk. Circular Valorization of Apple Pomace: Biochar for Co(II) Remediation and Catalytic HDPE Pyrolysis
N. Stoliarchuk, O. Semeshko, Y. Demianenko, M. Vaclavikova, I.Melnyk. Balancing Amino and Thiol Groups in Ethylene-Bridged Materials: Different Uptake Behavior Toward Cu(II) Ions and a Cu-Containing Dye

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SEMESHKO, Olha** – KOVALENKO, Olena – KYSHKAROVA, Viktoriia – MELNYK, Inna. Grapevine Wood-Derived Biochar as a Sustainable Adsorbent for Pharmaceutical Removal from Water. In Synergy of Science and Business 2026. III. Ed.: Chepelyuk, O.V. – Lviv, Ukraine : Liha-Pres, 2026, p.133-136. ISBN 978-966-397-624-2.
ČIČÁKOVÁ, Claudia** – KUPKA, Daniel – ILLSLEY, Matt – JÁGER, Dávid – MIKHALOVSKY, Sergey – MOHSEN, Monirialamdari. Comparative evaluation of electrochemical oxidation and non-thermal plasma as advanced oxidation processes. In GEOCHÉMIA 2026 : Zborník vedeckých príspevkov z konferencie. Editor Ľubomír Jurkovič, Jozef Kordík, Claudia Čičáková ; rec. Juraj Majzlan, Peter Koděra, Martin Mihaljevič. 1. vyd. – Bratislava : Štátny geologický ústav Dionýza Štúra, 2026, p.41-42.
SEMESHKO, Olha** – HREDZÁK, Slavomír – MELNYK, Inna. Mineral-Derived Silica Nanoparticles for Efficient Removal of Rare-Earth Ions and Dye from Water. In 15th International Colloids Conference. – Sitges, Spain : ELSEVIER Compendex a Scopus, 2026.
SEMESHKO, Olha** – HREDZÁK, Slavomír – DUTKOVÁ, Erika – MELNYK, Inna. Integrated Wastewater Remediation and Antibiotic Detection Using Silica Hybrid Adsorbents. In Water in Industry 2026 an IWA. – Delft, NL : Delft University of Technology and Haskoning, 2026, p.1.
SEMESHKO, Olha** – STOLIARCHUK, Natalyia – TOMINA, Veronika – MELNYK, Inna. Influence of Structure-Directing Agents on the Architecture and Properties of Thiol-Functionalized Silica Spheres. In Materials 2026 : International conference on materials science, engineering and technology. Conference abstract book. Singapore, 5.-7.5.2026. – [S.l. : s.n.], 2026, p.2.
SEMESHKO, Olha** – STOLIARCHUK, Natalyia – TOMINA, Veronika – MELNYK, Inna. Water purification under the environmental challenges of Ukraine: biochar and functionalized silica adsorbents. In Science as the Foundation of the Development, Security, and Independence of Ukraine – 2026 : prpoceedings of the 1st Regional Scientific and Practical Conference of Young Scientists Dedicated to the Day of Science in Ukraine, May 15, 2026, Kherson, Ukraine. – Kherson, Ukraine, 2026, p.3.
STOLIARCHUK, Natalyia** – TOMINA, Veronika – PETRYSHYN, Volodymyr – MELNYK, Inna. Peculiarities of Chromium(VI) ions removal using silica sorbents with quaternary ammonium groups. In Aktualni zadači chimiii: doslidženňa ta perspektytvy : Actual problems of chemistry:research and perspectives" X All-Ukrainian scientific conference April 15, 2026, Zhytomyr, Ukraine. Rec.: Starostenko, O.M., Kozakevych, R.B., Zablotska O.S.,. – Zhytomyr, Ukraine ; Ivan Franko State University : Žitomyrskyj deržavnzj universitet imeni Ivana Franka, 2026, p.61-64.
STOLIARCHUK, Natalyia** – TOMINA, Veronika – PETRYSHYN, Volodymyr – KOZAKEVYCH, Roman – MELNYK, Inna. Diclofenac sorption on quaternary ammonium organosilicas. In CHEMISTRY, PHYSICS AND TECHNOLOGY OF SURFACE. – Kyiv, Ukraine : Chuiko Institute of Surface Chemistry of NAS of Ukraine, 2026, p.232.

CONFERENCE ABSTRACTS

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