Production and viscosity of Xanthan Gum are increased by LED irradiation of X. campestris cultivated in medium containing produced water of the oil industry

Crugeira, Pedro J.L.; Almeida, Paulo Fernando de; Sampaio, Igor Carvalho Fontes; Soares, Luiz Guilherme P.; Amador, David A. Moraga; Samuel, Ifor D. W.; Persheyev, Saydulla; Silveira, Landulfo; Pinheiro, António Luiz Barbosa

doi:10.1016/j.jphotobiol.2021.112356

Cited by 10 publications

(1 citation statement)

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“…The Involvement of xanthan and gellan in heavy metal cation sequestration by living bacteria is plausible, since both polymers exhibit anionicity, and they are packed with negatively charged functional groups [ 69 ]. For example, xanthan, surrounding the cells of Xanthomonas spp., is expected to play a substantial role in metal removal from the water produced by the oil industry via binding the metal cations by forming the Werner-type complexes, since it possesses a number of hydroxyl and carboxyl groups [ 70 ]. However, the polysaccharide synthesis pathway is sensitive to stress conditions, and, thus, depending on the concentration and speciation of the heavy metal, the performance of the bacterium in remediation of contaminated medium can be hindered.…”

Section: Xanthan- and Gellan-producing Bacteriamentioning

confidence: 99%

Prospects of Biogenic Xanthan and Gellan in Removal of Heavy Metals from Contaminated Waters

et al. 2022

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Biosorption is considered an effective technique for the treatment of heavy-metal-bearing wastewaters. In recent years, various biogenic products, including native and functionalized biopolymers, have been successfully employed in technologies aiming for the environmentally sustainable immobilization and removal of heavy metals at contaminated sites, including two commercially available heteropolysaccharides—xanthan and gellan. As biodegradable and non-toxic fermentation products, xanthan and gellan have been successfully tested in various remediation techniques. Here, to highlight their prospects as green adsorbents for water decontamination, we have reviewed their biosynthesis machinery and chemical properties that are linked to their sorptive interactions, as well as their actual performance in the remediation of heavy metal contaminated waters. Their sorptive performance in native and modified forms is promising; thus, both xanthan and gellan are emerging as new green-based materials for the cost-effective and efficient remediation of heavy metal-contaminated waters.

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Section: Xanthan- and Gellan-producing Bacteriamentioning

confidence: 99%