Cadmium tolerance and adsorption by the marine brown alga Fucus vesiculosus from the Irish Sea and the Bothnian Sea

Brinza, Loredana; Nygård, Charlotta A.; Dring, M. J.; Gavrilescu, Maria; Benning, Liane G.

doi:10.1016/j.biortech.2008.09.041

Cited by 63 publications

(36 citation statements)

References 24 publications

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“…5 Production and usage of synthetic dyes and pigments have exceeded 700 000 tons worldwide. 6 During the past two decades, several decolorization techniques have been reported, few of them have been accepted by industries. Thus, there is a need to nd alternative costeffective and efficient treatments to remove dyes and colorants from effluents.…”

Section: Introductionmentioning

confidence: 99%

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

et al. 2015

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A contaminant resistant Lysinibacillus sp. NOSK was isolated from a soil sample and its Reactive Black 5 (RB5) and Cr(VI) removal efficiencies were investigated as a function of changes in the initial pH values, temperature, static/shaking conditions, reactive dye and Cr(VI) concentrations. In this study, an electrospun polysulfone nanofibrous web (PSU-NFW) was found to be effective in attachment of bacterial cells. Bacteria attached PSU-NFWs (bacteria/PSU-NFW) have shown highly efficient removal of RB5, as 99.7 AE 0.9% and 35.8 AE 0.4% for the pristine PSU-NFW. Moreover, the highest Cr(VI) removal efficiencies measured were 98.2 AE 0.6% for bacteria attached PSU-NFW and 32.6 AE 0.6% for the pristine PSU-NFW. Simultaneous removal of RB5 and Cr(VI) were also investigated. Reusability test results indicate that, bacteria/PSU-NFW can be reused for at least 7 cycles with 28.1 AE 0.6% and 66.7 AE 0.8% removal efficiencies for RB5 and Cr(VI), respectively.

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Section: Introductionmentioning

confidence: 99%

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

et al. 2015

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“…Compared with the other seaweed groups, brown seaweeds have been recognized to display a natural biosorbent characteristic, i.e., a capacity related to the presence of chemical and structural components responsible for retention and assimilation. More specifically, the cell walls of brown seaweeds act as a physical and chemical barrier against heavy metal penetration and can retain those elements efficiently, as previously reported (Davis et al 2000;Brinza et al 2009;Costa et al 2016). Alginate, a polysaccharide which is present in cell walls, contains sulphated groups able to maintain ionic ligations, thereby enabling this structure to reduce ion penetration in cytoplasm and retain metallic ions through chemical ligation or precipitation (Fourest and Volesky 1996;Davis et al 2000).…”

Section: Discussionmentioning

confidence: 76%

“…Brown seaweeds have been recognized for decades as excellent biomonitors for heavy metals (Andrade et al 2010), and processed biomass has been employed in tests for industrial biofilters of wastewater (Davis et al 2000;Souza et al 2013). The retention of metals by brown seaweeds is attributed to many physical mechanisms, such as ligation with alginate, a polysaccharide present in cell walls, through ion exchange equilibrium of surface functional groups (Davis et al 2003;Brinza et al 2009). Brown seaweeds also exhibit intracellular mechanisms to immobilize, neutralize or otherwise detoxify heavy metals through the activity of membrane vesicles, called physodes, as well as enzymatic and antioxidant reactions of polyphenols and phytochelatins (Pinto et al 2003;Connan and Stengel 2011).…”

Section: Introductionmentioning

confidence: 99%

The brown seaweed Sargassum cymosum: changes in metabolism and cellular organization after long-term exposure to cadmium

et al. 2016

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Sargassum cymosum was exposed to cadmium (Cd) to determine any physiological and ultrastructural effects. To accomplish this, S. cymosum samples were cultivated under photosynthetic active radiation (PAR) and Cd (0, 0.1, 0.2, 0.4 and 0.8 mg L) during 7 and 14 days in laboratory-controlled conditions (0 mg L Cd at both exposure times as control). Seaweeds had high retention capacity (over 90 %) for both exposure times. Growth rates showed significant increases by 14 days, especially for 0.1 and 0.4 mg L Cd. Photosynthetic parameters were unaffected by Cd treatments. Chlorophyll contents were present in higher concentrations for all Cd treatments compared to respective control. Carotenoid profile showed significant differences in total composition and proportion of fucoxanthin and β-carotene, and no lutein was detected at 14 days. Phenolic and flavonoid compounds showed major accumulation at 14 days. Transmission electron microscopy (TEM) analyses presented major alterations in Cd-treated samples, when compared with respective control, in particular disorganization of cell wall fibrils. When compared to respective control samples, multivariate analyses showed disparate and complex interactions among metabolites in Cd-exposed seaweeds, giving evidence of physiological defence response. Thus, it can be concluded that Cd is a stressor for S. cymosum, resulting in physiological and structural alterations related to defence mechanisms against oxidative stress and toxicological effects resulting from long-term metal exposure. However, in the present paper, some observed changes also appear to result from acclimation mechanisms under lower concentration of Cd relative to the tolerance of S. cymosum to experimental conditions.

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“…Annually, 700 000 tons of dye related products are fabricated in the world. [1][2][3][4] Apart from the esthetic view point, most of the dyes contain carcinogens such as; benzidine which requires treatment before it is drained into the environment. Furthermore, untreated water reduces solubility of the gas in water resources.…”

Section: Introductionmentioning

confidence: 99%

Reusable bacteria immobilized electrospun nanofibrous webs for decolorization of methylene blue dye in wastewater treatment

et al. 2014

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In our study, an electrospun cellulose acetate nanofibrous web (CA-NFW) was found to be quite effective in immobilizing bacterial cells. Here, decolorization of methylene blue (MB) dye in aqueous medium was achieved by using three types of bacteria (Aeromonas eucrenophila, Clavibacter michiganensis and Pseudomonas aeruginosa) immobilized on the CA-NFW. The decolorization time (0-48 h) and different MB dye concentrations (20-500 mg L À1 ) were studied to elucidate the maximum MB dye removal by the bacteria immobilized CA-NFWs. The effective dye decolorization was achieved within 24 hours and MB dye removal was $95%. Interestingly, MB dye decolorization performance of bacteria immobilized CA-NFWs was quite close to that of free bacteria. We have also tested the reusability of bacteria immobilized NFWs after four cycles and $45% of the dye decolorization capacity was obtained at the end of the 4th cycle. These results are quite promising and therefore suggest that bacteria immobilized electrospun NFWs could be quite applicable for the decolorization of dyes in wastewater due to their versatility and reusability.

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Cadmium tolerance and adsorption by the marine brown alga Fucus vesiculosus from the Irish Sea and the Bothnian Sea

Cited by 63 publications

References 24 publications

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

The brown seaweed Sargassum cymosum: changes in metabolism and cellular organization after long-term exposure to cadmium

Reusable bacteria immobilized electrospun nanofibrous webs for decolorization of methylene blue dye in wastewater treatment

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