Author

Zdravka Velkova

Observed names: Z Velkova, Z. Velkova, ZDRAVKA VELKOVA, Zdravka Y. Velkova, Zdravka Yancheva Velkova

Institution: Medical University Plovdiv

Observed institutions: Medical University Plovdiv, University of Food Technologies

ORCID: 0000-0002-1794-1240

Observed ORCID: 0000-0002-1794-1240

OpenAlex ID: A5011540801

Immobilized microbial biosorbents for heavy metals removal

2018 · Zdravka Velkova, Gergana Kirova, et al. · Engineering in Life Sciences · 128

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Novel composite biosorbent from Bacillus cereus for heavy metals removal from aqueous solutions

2019 · Kostadinka Todorova, Zdravka Velkova, et al. · Biotechnology & Biotechnological Equipment · 52

Biosorption of Congo Red and Methylene Blue by pretreated waste Streptomyces fradiae biomass - Equilibrium, kinetic and thermodynamic studies

2017 · Zdravka Velkova, Gergana Kirova, et al. · Journal of the Serbian Chemical Society · 44

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Hybrid electrochemical biosensor for organophosphorus pesticides quantification

2008 · Margarita Stoytcheva, Roumen Zlatev, et al. · Electrochimica Acta · 41

Advances in electrochemical sensors for paracetamol detection: Electrode materials, modifications, and analytical applications

2024 · Margarita Stoytcheva, Zdravka Velkova, et al. · International Journal of Electrochemical Science · 34

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

2015 · Gergana Kirova, Zdravka Velkova, et al. · Biotechnology & Biotechnological Equipment · 31

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Electrochemical Biosensors for Direct Determination of Organophosphorus Pesticides: A Review

2015 · Margarita Stoytcheva, Velizar Gochev, et al. · Current Analytical Chemistry · 30

Analytical Characteristics of Electrochemical Biosensors

2009 · M Stoytcheva, R Zlatev, et al. · Portugaliae electrochimica acta · 28

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Hexavalent chromium removal by waste mycelium of Aspergillus awamori

2010 · Velizar Gochev, Zdravka Velkova, et al. · Journal of the Serbian Chemical Society · 25

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Amperometric biosensors precision improvement. Application to phenolic pollutants determination

2014 · M. Stoytcheva, R. Zlatev, et al. · Electrochimica Acta · 24

Electrochemical sensor based on Arthrobacter globiformis for cholinesterase activity determination

2005 · Margarita Stoytcheva, Roumen Zlatev, et al. · Biosensors and Bioelectronics · 22

The validity of using bare graphite electrode for the voltammetric determination of paracetamol and caffeine

2023 · Margarita Stoytcheva, Roumen Zlatev, et al. · International Journal of Electrochemical Science · 21

Tetracycline removal from model aqueous solutions by pretreated waste Streptomyces fradiae biomass

2021 · Gergana Kirova, Zdravka Velkova, et al. · Biotechnology & Biotechnological Equipment · 21

Electrochemical study on the type of immobilized acetylcholinesterase inhibition by sodium fluoride

2008 · Marcela Ovalle, Margarita Stoytcheva, et al. · Electrochimica Acta · 21

Recent Advances in Pharmaceuticals Biosorption on Microbial and Algal-Derived Biosorbents

2025 · Zdravka Velkova, Kristiana Lazarova, et al. · Processes · 20

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Nanostructured platform for the sensitive determination of paraoxon by using an electrode modified with a film of graphite-immobilized bismuth

2017 · M. Stoytcheva, R. Zlatev, et al. · Microchimica Acta · 20

Advances in the Electrochemical Analysis of Dopamine

2017 · Amelia Olivas, Lydia Toscano, et al. · Current Analytical Chemistry · 20

A nanotechnological approach to biosensors sensitivity improvement: application to organophosphorus pesticides determination

2017 · Margarita Stoytcheva, Roumen Zlatev, et al. · Biotechnology & Biotechnological Equipment · 19

Amperometric biosensor precision improvement: application to organophosphorus pesticide determination

2014 · M. Stoytcheva, R. Zlatev, et al. · Analytical Methods · 14

Biosorption of Cu (II) onto chemically modified waste mycelium of Aspergillus awamori: Equilibrium, kinetics and modeling studies

2012 · ZDRAVKA VELKOVA, MARGARITA STOYTCHEVA, et al. · DOAJ (DOAJ: Directory of Open Access Journals) · 14

Simultaneous Determination of Hydroquinone and Catechol by Differential Alternative Pulses Voltammetry

2018 · Alan Ayala, Margarita Stoytcheva, et al. · Electroanalysis · 13

Chitosan Nanocomposite Modified OPH-Based Amperometric Sensor for Organophosphorus Pesticides Determination

2017 · Mary Triny Beleno Cabarcas, Margarita Stoytcheva, et al. · Current Analytical Chemistry · 11

Organophosphorus Pesticides Determination by Electrochemical Biosensors

2011 · Margarita Stoytcheva, Roumen Zlatev, et al. · InTech eBooks · 11

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Resolution of a Mononitrophenol Isomers Mixture by Differential Alternative Pulses Voltammetry

2019 · Margarita Stoytcheva, Roumen Zlatev, et al. · Electroanalysis · 10

Vanadium-Containing Anionic Chelate for Spectrophotometric Determination of Hydroxyzine Hydrochloride in Pharmaceuticals

2023 · Gergana Kirilova Kirova, Zdravka Yancheva Velkova, et al. · Molecules · 9

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Works count: 59

Citation count: 766

H-index: 18

I10-index: 24