Insight into the biosorptive removal mechanisms of hexavalent chromium using the red macroalgae Gelidium sp.

Narayanan, Ishvarya; Kumar, P. Senthil; Franco, Dison S.P.; Georgin, Jordana; Meili, Lucas; Selvasembian, Rangabhashiyam

doi:10.1007/s13399-023-04390-8

Cited by 6 publications

(3 citation statements)

References 106 publications

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Section: Adsorption and Desorptionmentioning

confidence: 99%

“…One of the great advantages of using biomass of biological origin as a biosorbent is related to its low cost, seeking to add value to a biomass present in large quantities in society, making a more environmentally friendly process (Ojima et al, 2019;Franco, Georgin, Ramos, Eljaiek et al, 2023;Franco, Georgin, Ramos, Netto, Lobo et al, 2023;Narayanan et al, 2023). Another aspect is that these materials have functional groups that play an important role as adsorptive sites for many contaminants, which supports the removal process mainly of dyes and heavy metals (Narayanan et al, 2023). Finally, adsorption is a process that requires a relatively simple operational structure, without the need to add nutrients to the process and because it is most often a process with interactions of a physical nature, desorption through regeneration and reuse of the adsorbent is a possibility (Jacob et al, 2018;Liu et al, 2018;Aryal, 2021).…”

Section: Adsorption and Desorptionmentioning

confidence: 99%

“…In these situations, after adsorption, desorption is necessary, as metal recovery occurs (Giese, 2020). In this stage, the metal ions present on the surface are removed, where a selective eluent for biomass is recommended, non-toxic and low-cost, providing intact binding capacity to the pollutant (Vieira et al, 2022;Franco, Georgin, Ramos, Netto, Ojeda et al, 2023;Narayanan et al, 2023).…”

Section: Adsorption and Desorptionmentioning

confidence: 99%

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A review of the application of low-cost adsorbents as an alternative method for biosorption of contaminants present in water

Georgin,

Meili,

Franco

2023

LADEE

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Introduction: When using conventional methods to remove contaminants present in water, it generates limitations, such as low efficiency values, and the need for a large operating area added to a high operational cost. As a result, the scientific community has focused its efforts on improving existing removal methods, such as adsorption more focused on the use of biosorbents. These are generally zero-cost waste materials in nature that have a large volume, an example is those generated in agriculture, such as rice husks, peanut husks, cassava husks, and fruit husks, among others. Methodology: This study sought to carry out an extensive review through a broad database, providing biosorbents already produced and used to remove various contaminants. For certain contaminants such as dyes and some heavy metals, dead or live biomasses present promising removal results. The great advantage is that these materials generally present insufficient management, causing several environmental problems. Once used as biosorbents, they solve the problem of bioaccumulation and support the treatment of effluents, making the process sustainable. Results: The most satisfactory results were obtained in the removal of heavy metals, while the use of microbial biomass presented a lower performance, being more dependent on the control of nutrients and other parameters involving the process. The removal of other organic compounds presented greater complexity since they presented functional groups of varying ionic nature, which influence the interaction have the functional groups present on the surface of the biosorbent. Conclusions: Finally, Biosorption presents several advantages such as its cost-benefit, high effectiveness, easy implementation, and how fibrous residues are used, the active sites are freer to adsorb substances and chemicals. Added to this, it enables the use of waste which supports management, reducing environmental pollution resulting from incorrect disposal, making the process sustainable globally.

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