Abstract
Residual biomass from various industries represents an important source of valuable compounds, used as raw materials for the production of a wide range of new products and also in various treatment and valorization processes or/and sanitation services, thus responding to the principles of sustainable development, waste recovery, and a green and circular economy. The aim of this work is to make use of residual Bacillus sp. biomass (resulting from a process of removing fatty acids from municipal wastewater) immobilized in alginate that, although it results in large quantities from biotechnological processes, is not reported to be valorized in dye biosorption processes, except in few specific applications. The biosorption potential of residual Bacillus sp. biomass in the reactive Brilliant Red HE-3B textile dye removal from aqueous systems was studied in a fixed-bed column. The effects of various experimental operating parameters, such as bed depth (h), flow rate (Fv), were investigated, and the modeling of experimental data based on Thomas and Yoon–Nelson kinetic models was satisfactorily achieved. The obtained results reconfirm that the studied residual biomass can be also considered as a good biosorbent in dynamic operating system, and can be beneficially used in the treatment of wastewater containing small quantities of organic dyes.
Highlights
In recent years, water pollution has become a worrying phenomenon of global interest
As pointed out in the previous static study [27], the results show that the biosorption process of reactive Brilliant Red HE-3B (BRed) anionic dye by the immobilised residual biomass as biosorbent, is a physico-chemical process (based on competitive hydrogen bonding, π-π interactions, electrostatic interactions, ion-exchanges, covalent bonding, hydrophobic interactions) that proceeds properly at acidic pH, moderate dye concentrations in aqueous solution and ambient temperature (20–25 ◦C)
The experimental results confirmed that the studied residual biomass, immobilized in alginate, can be considered a very effective biosorbent in a static operating regime, but not for dynamic operating systems, especially when the intention is treat industrial effluents containing organic dyes
Summary
Water pollution has become a worrying phenomenon of global interest. It is obvious that the natural environment is deteriorating more and more and that ecological systems can no longer adapt to the pressure of anthropogenic factors [1,2,3] In this context, there have been numerous methods and technologies developed over time for the depollution of environmental components, depending on the polluted matrix, the nature of the polluting species, and the subsequent use of the decontaminated element (water, air, soil) [4,5,6,7,8,9,10,11,12]. Attention in recent years has been focused on the use of various “living” techniques for treating contaminated environmental components, especially with organic pollutants, harnessing and developing known information from the self-purification processes of environmental components [13,14,15,16,17,18]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
