Alexandra TANASA1, Alexandra Cristina BLAGA1, Daniela SUTEU1* 1” “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, 73A Prof.Dr.docent D.Mangeron Blvd., 700050, Iasi, Romania danasuteu67@yahoo.com
Among the directions of capitalization of residual microbial biomass resulting in fermentation processes (biosynthesis or food industry), it can be considered its use in immobilized form in various natural polymers as a biosorbent for retaining chemical species polluting the aqueous environment. The aim of this study is to investigate the biosorption properties of immobilized residual microbial biomass by encapsulation in sodium alginate to retain the anionic reactive organic dye Brilliant Red HE-3B in a batch system of aqueous solutions. In order to evaluate the biosorption potential of the studied biomass, the influence of certain physical parameters such as temperature, pH of the solution, quantity and size of biosorbent particles, initial dye concentration and phase contact time were investigated. The obtained results confirmed that the biosorption capacity of the studied biomass increases with the temperature and the contact time of the phases until reaching an equilibrium, has high values in acidic environment due to the anionic character of the retained chemical species and depends on the amount of biosorbent used, particle size. Thus, it can be said that the studied residual biomass encapsulated in sodium alginate could be an efficient way to obtain new types of biosorbents with applicability in retaining textile organic dyes from industrial effluents before discharging them into sewage systems or recirculating them in different technological processes. In this sense, the study of biosorption processes can be complemented by modelling the biosorption equilibrium, thermodynamic and kinetic studies to establish the biosorption mechanism and identify the optimal conditions for the use of industrial processes.
aqueous media, biosorption, dye retention, encapsulation, residual biomass
environmental engineering
Presentation: None