Biossorção passiva de cromo (VI) através da microalga Spirulina platensis

Magro, Clinei Dal; Deon, Maitê Carla; Thomé, Antônio; Piccin, Jeferson Steffanello; Colla, Luciane Maria

doi:10.1590/s0100-40422013000800011

Cited by 20 publications

(16 citation statements)

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“…Detailed results suggest that the polyacrylate main chain degraded in the soils, if at all, at rates of 0.12-0.24% per 6 months [93] . Further, Sthal et al [64] studied the rate of biodegradability of superabsorbent copolymers made out of polyacrylamide and polyacrylate, and pure polyacrylate in soils.…”

Section: Trends Of Biodegradable Polymer Materials In Agriculture Appmentioning

confidence: 96%

“…They proposed a hydrolysis process from Si-O-C bonds in aqueous solution which degraded the hybrid hydrogels in a matter of days. Wilske et al [107] characterized the biodegradability of SAP based on polyacrylate for Tl(II) [89] Green coconut shell Fibers (polysaccharide) 22.96 mg g -1 Cr(VI) [90] Chitosan polysaccharide 36.8 mg g -1 Pb(II) [91] Sawdust polysaccharide 26 mg g -1 (Pb) Pb(II) [92] 22 Cr(VI) [93] Rice straw Cellulose, hemicellulose and lignin 30.0 mg g -1 (Cr) Cr(III) [94] 22.5 mg g -1 (Cu) Cu(II)…”

Section: Trends Of Biodegradable Polymer Materials In Agriculture Appmentioning

confidence: 99%

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Polymers and its applications in agriculture

et al. 2017

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Graphical Abstract RbstractPolymers are a class of soft materials with numerous and versatile mechanical and chemical properties that can be tuned specific to their application. Agriculture is an expanding area due to the requirement for indispensable food to meet the demands of a growing global population. Consequently, development of technology to improve the quality of the soil and agriculture manages is still under development. Intelligent agricultural supplies (controlled or slow release agrochemicals and superabsorbents) and biosorbents contribute to an expanding niche using technology from polymers. This review elucidates the state-of-the-art and will discuss some important aspects of using polymers in intelligent fertilizers, as well as superabsorbent, biosorbent and biodegradation processes in agriculture that are environmentally, technically, socially, and economically sustainable.

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Section: Trends Of Biodegradable Polymer Materials In Agriculture Appmentioning

confidence: 96%

Section: Trends Of Biodegradable Polymer Materials In Agriculture Appmentioning

confidence: 99%

Polymers and its applications in agriculture

et al. 2017

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“…Os compostos de Cr(VI) como, cromatos, dicromatos e o ácido crômico apresentam alto potencial deletério, devido a sua grande toxicidade para a saúde humana 3 . Os efluentes contendo o metal possuem alto poder de contaminação, sendo necessário tratamento adequado para serem lançados diretamente nos corpos receptores, obedecendo às condições, padrões e exigências dispostos na Resolução Nº 430, de 13 de maio de 2011, do Conselho Nacional do Meio Ambiente -CONAMA 4,5 .…”

Section: Introductionunclassified

Biossorção de Cr (VI) Utilizando-se o Farelo de Sabugo de Milho

Ferreira

Morais

2016

Rev. Proc. Q.

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Foi investigada a capacidade de adsorção do Cr(VI) em solução aquosa, pela aplicação da biomassa de farelo de sabugo de milho, coletadas junto ao comércio local do município de Goiânia/GO, em sistema de batelada, apresentando taxa de remoção de Cr(VI) da ordem de 100% para a concentração iniciais de Cr(VI) e nas concentrações de 30 e 40 mg/L do metal resultado numa Ef biossorção de 98,87 e 92,27%, respectivamente, com qeq máximo de 1,54 mg/g para um período de 120 horas para um conteúdo de 5 g da biomassa. Uma vez já definido que a respectiva biomassa é um resíduo industrial, e sabendo que esse vem sendo estudado na reutilização em outros processos, os resultados obtidos demonstram elevado potencial para o farelo de sabugo de milho, o qual pode ser utilizado em sistemas de adsorção para tratamento do respectivo metal pesado Cr(VI), podendo esse ser aplicável nas atividades industriais geradoras do respectivo resíduo. Palavras-chave:Cr(VI), farelo de sabugo de milho, adsorção, biomassa.The adsorption capacity Cr(VI ) was investigated in aqueous solution by the application of biomass corncob meal, collected at the local shops in the city of Goiânia/ GO, batch system , with removal rate Cr(VI) of the order of 100% for the initial concentration of Cr(VI) and the concentrations of 30 and 40 mg/L resulted in a metal Efbiosorption 98,87 and 92,27% , respectively, with a maximum of q and q 1,54 mg/g for a period of 120 hours to a content of 5 g of biomass. Once we decided that their biomass is an industrial waste, and knowing that it has been studied in reuse in other processes, the results show high potential for bran corn cobs, which which can be used in adsorption systems for the treatment of the respective heavy metal Cr (VI) and the same is applicable in the industrial activities generating the respective residue.

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“…In our research group, we already studied the active and passive biosorption of hexavalent chromium by Spirulina platensis, obtaining 61.97% of Cr VI removal using dead biomass (passive biosorption), in pH 3, with maximal adsorption capacity of 100.39 mg.g −1 (Dal Magro et al 2013). In another work we show that Spirulina platensis Leb-52 strain can perform the active biosorption of Cr VI from wastewaters with removal rates of 45% to 60.92% for initial concentrations of Cr VI of 11.7 mg. L −1 and 3 mg.L −1 , respectively (Dal'Magro et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Potential of LiveSpirulina platensison Biosorption of Hexavalent Chromium and Its Conversion to Trivalent Chromium

Colla

Dal'Magro

Rossi

et al. 2014

International Journal of Phytoremediation

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Microalga biomass has been described worldwide according their capacity to realize biosorption of toxic metals. Chromium is one of the most toxic metals that could contaminate superficial and underground water. Considering the importance of Spirulina biomass in production of supplements for humans and for animal feed we assessed the biosorption of hexavalent chromium by living Spirulina platensis and its capacity to convert hexavalent chromium to trivalent chromium, less toxic, through its metabolism during growth. The active biomass was grown in Zarrouk medium diluted to 50% with distilled water, keeping the experiments under controlled conditions of aeration, temperature of 30°C and lighting of 1,800 lux. Hexavalent chromium was added using a potassium dichromate solution in fed-batch mode with the aim of evaluate the effect of several additions contaminant in the kinetic parameters of the culture. Cell growth was affected by the presence of chromium added at the beginning of cultures, and the best growth rates were obtained at lower metal concentrations in the medium. The biomass removed until 65.2% of hexavalent chromium added to the media, being 90.4% converted into trivalent chromium in the media and 9.6% retained in the biomass as trivalent chromium (0.931 mg.g(-1)).

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Biossorção passiva de cromo (VI) através da microalga Spirulina platensis

Cited by 20 publications

References 20 publications

Polymers and its applications in agriculture

Polymers and its applications in agriculture

Biossorção de Cr (VI) Utilizando-se o Farelo de Sabugo de Milho

Potential of LiveSpirulina platensison Biosorption of Hexavalent Chromium and Its Conversion to Trivalent Chromium

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