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Scientific interests:

• Synthesis, modification, and characterization of adsorbents, including nanomaterials, biomaterials, natural inorganic sorbents, and activated carbons.
• Liquid-phase adsorption processes.
• Utilization of waste materials from agriculture, the food industry, essential oil production, and other sectors.

Selected papers:

1. L. Lakov, P. Vassileva, O. Peshev:
   „Sorption of heavy metals on pyrazolone-containing carbon sorbents„,
   Carbon 37 (1999) 1655-1657.
2. P. Vassileva, D. Voikova,
   “Investigation on natural and pretreated Bulgarian clinoptilolite for ammonium ions removal from aqueous solutions”,
   Journal of Hazardous Materials 170 (2-3) (2009) 948-953.
3. P. Vassileva, P. Tzvetkova, R. Nickolov,
   “Removal of ammonium ions from aqueous solutions with coal-based activated carbons modified by oxidation”,
   Fuel 88 (2009) 387-390.
4. P. Vassileva, I. Uzunov, D.Voykova, A. Kovacheva, I. Avramova, G. Tyuliev, R. Kukeva, D. Mehandjiev,
   “Study of adsorption on cellulose-based biosorbents”
5. Cellulose Chemistry and Technology, 58 (5-6) (2024) 663-673.
6. P.Vassileva, D.Voykova, D. Kichukova, T. Lazarova, G. Atanasova, D. Kovacheva, I. Spassova
   “A highly efficient graphene-based material for the removal of cationic dyes from aqueous solutions”,
   Materials, 18(4, (2025) 853