B.Sc

Jan 9, 2012 - Dec 7, 2016

Chemistry

M.Sc

Jan 9, 2019 - Feb 1, 2021

Chemistry/Physical Chemistry

Techning [Assistant Lecturer]

Jan 9, 2023 - Jan 2, 2024

Silver nanoparticles supported over chitosan-tannic acid composite-modified magnetic nanoparticles as recyclable catalyst for creation of propargylamines

Sep 19, 2025

Journal Inorganic Chemistry Communications

DOI https://doi.org/10.1016/j.inoche.2025.115547

Issue 2

Volume 182

In this study, we described the production and testing a new type of magnetic material that contains silver NPs adorned on coated Fe3O4 NPs, using a mix composite of chitosan and tannic acid (CS/TA). The produced Fe3O4@CS/TA-Ag NPs material was analyzed using various methods like TEM, FESEM, EDX, map analysis, VSM, XRD and ICP-OES study. The TEM images shown the immobilized Ag NPs, measuring about 30–50 nm over the surface of modified Fe3O4 NPs. The performance of the Fe3O4@CS/TA-Ag NPs as catalyst was examined for the preparation of propargylamines by using a reaction that combines alkynes, amines, with aldehydes, known as A3 coupling. The Fe3O4@CS/TA-Ag NPs catalyst was recycled through a magnetic field and applied adequate stability for reuse over 6 consecutive cycles with minimal decrease of activity. Different aromatic aldehydes were combined with phenyl acetylene and morpholine to create various PAs under improved parameters with good yield (82–98 %).

Comparative Performance of NF90 and NF270 Nanofiltration Membranes in Direct Dye Removal from Aqueous Solutions

Aug 31, 2025

Journal International Journal of Heat and Technology

DOI https://www.iieta.org/journals/ijht/paper/10.18280/ijht.430422

Issue 4

Volume 43

This work uses NF90 and NF270 nanofiltration membrane separation to remove direct dyes from aqueous solutions. DR80 and DY8 are the direct dyes used in this investigation. The textile industry releases direct dye effluent into rivers and oceans, causing several major problems. The purpose of this study is to compare the dye rejection and permeate flow performance of nanofiltration membranes (NF90 and NF270) for DR80 and DY8. The study also tested microfilter paper (MF) under 100 KPa to reject DR80 and DY8. The pH, operating pressure, and dye concentration of the original solution determine dye rejection and permeate flow. The investigation shows that NF90 and NF270 reject DR80 at 98.98% and 98.30%, respectively, between 600–1000 KPa. Additionally, DY8 rejection averages 90.18 percent and 97.1 percent. The investigation also found that both dyes had the lowest permeate flux at 1.0 g/L and the greatest at 0.2 g/L. Comparisons show that microfilter paper rejects less than nanofiltration membrane. A predicament arises from the fact that the nanofiltration membrane operates at pressures six to ten times higher than those used in microfiltration, which typically functions at approximately 100 kPa. As a result, a direct comparison between the two filtration methods may lead to misleading conclusions.

Application of reverse osmosis to improve removal of residual salt content in electrodialysis process

Jun 10, 2022

Journal AIP Conference Proceedings

publisher AIP Publishing LLC

DOI https://doi.org/10.1063/5.0088662

Issue 1

Volume 2466

Salt content is one of the most important sources of industrial wastewater. Industrial wastewater from pigment production industries contains high amounts of salts. Electrodialysis (ED) is a common technology used in desalination of industrial wastewater with high recovery rates. Ion exchange membranes (IEMs) are widely used in ED process. Before electrodialysis, a preliminary wastewater treatment using microfilter paper is important to prevent damage of membranes. Reverse osmosis (RO) membranes are used for greater extraction of salts and dissolved organic materials. Membrane fouling is one of most affecting factors in the processes of electrodialysis and reverse osmosis desalination. IEMs are less membrane fouling than reverse osmosis and can be used for long life time. Spiral wound thin-film flat membrane composite polyamide is considered to be the most common membrane module used in reverse

Features of feed concentration and temperature effects on membranes operation in electrodialysis systems–A review

Aug 1, 2021

Journal Journal of Physics: Conference Series

publisher IOP Publishing

DOI https://iopscience.iop.org/article/10.1088/1742-6596/1973/1/012178

Issue 1

Volume 1973

Electrodialysis (ED) is a significant method in saline water desalination and industrial wastewater treatment. Ion exchange membranes (IEMs) are an important part of the electrodialysis process. An ion-exchange membrane is a semipermeable membrane that transports ions through an oppositely charged membrane and blocks the passage of a co-ion under an electric field. This review describes the effects of feed concentration and its operating temperature on different sides of IEMs in an electrodialysis system. The influence of feed solutions and temperature gradients on diffusion and osmatic membrane permeability was clarified. The distribution of feed concentration under thermostatic and thermodynamic conditions are also discussed. Temperature changes in ED systems may increase ion transport selectivity and charge separation efficiency. The rate of ions transport depends on the number of ions diffusion

Methods for removing pigments from waste water

Apr 26, 2021

Journal OF THE TOMSK POLYTECHNIC UNIVERSITY GEO АSSETS ENGINEERING

DOI https://scholar.google.com/citations?view_op=view_citation&hl=ar&user=PQq2cjAAAAAJ&citation_for_view=PQq2cjAAAAAJ:u-x6o8ySG0sC

Relevance. Dyes and pigments are natural and xenobiotic compounds that are widely used in various fields of human activity due to their ability to impart color to objects. During the implementation of production with the use of pigments, wash water containing pigment is formed, which is most often waste water. As a result, the enterprise loses some of its valuable pigments and dyes, and the environment is exposed to technogenic impact. Various colorants in water have an adverse effect on the environment. Therefore, purification of waste water from pigments is an urgent problem. Aim: finding the most efficient and cost-effective technological process for wastewater treatment from pigments and dyes. Methods: collection, generalization and comprehensive analysis of data on methods of wastewater treatment from dyes and pigments. Results. The paper considers the existing technologies of treatment of wastewater containing pigments and dyes and introduces the examples of Russian and foreign experience. It is shown that it is impossible to create a unified treatment technology of wastewater containing pigments and dyes, since the choice of a specific treatment is influenced by the characteristics of wastewater due to the production technology and the type of pigments and dyes. Nevertheless, it is possible to systematize the existing technologies for a more convenient and quick selection of the required technological process. The authors have described the mechanical, mass transfer, chemical and biological purification processes and analyzed both individual processes and a combination of several ones. The use of several processes in one technological stage of wastewater separation is the most efficient and cost-effective solution.