Utilisation of native, heat and acid-treated microalgae Chlamydomonas reinhardtii preparations for biosorption of Cr(VI) ions

Arıca, M. Yakup; Tüzün, İlhami; Yalçın, Emine; İnce, Özlem; Bayramoğlu, Gülay

doi:10.1016/j.procbio.2004.09.008

Cited by 142 publications

(61 citation statements)

References 42 publications

(43 reference statements)

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“…Overall, all heating processes improved biosorbent capacity ( Figure 1 and Table 1). This behavior is related in literature by different materials (Arica et al, 2005;Bayramoğlu and Arica, 2008).…”

Section: Metals Uptake By the Yeast Biosorbent Materialssupporting

confidence: 53%

“…Thermal inactivation is employed to interrupt the metabolism for biosorption and also has been used to improve their sorption capacity (Arica et al, 2005;GüriĢik et al, 2004;Bayramoğlu and Arica, 2008). However, such items do not discuss how biological inactivation by heating processes affects the sorption sites of biosorbents, contributing to the improvement of sorption capacity.…”

Section: Introductionmentioning

confidence: 99%

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2015

Rev. ambiente água

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Section: Metals Uptake By the Yeast Biosorbent Materialssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Untitled

2015

Rev. ambiente água

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“…The accumulation of heavy metals in algae involves and rapid uptake initially followed by slower uptake [37,[39][40][41]. The same trend was observed in the experiments as the metal sorption rate was higher in first 36 hours followed by significantly slower uptake in the next hours.…”

Section: As(iiimentioning

confidence: 54%

“…This could be due to the larger surface area due to the destruction of cell membranes during the dried biomass preparation. Non-living microbial cells have lower sensitivity to toxic metal ions concentrations over living cells which offer to use them at adverse operating conditions [37]. The metal sorption capacity was drastically reduced at pH values above 6.0, which could be due to the formation of insoluble metal hydroxides.…”

Section: As(iiimentioning

confidence: 99%

“…Further, it was noted that the arsenic uptake was lowered at pH below 4.0. The temperature of the solution could influence the metal biosorption of living cells [37] and culture temperatures have profound effects on the chemical composition of the algal cells. The biosorption of As increased with temperatures from 23°C-32°C and the results indicated that elevated temperatures tend to increase the biosorptive properties of isolated microalgae with an optimum temperature of 32°C.…”

Section: As(iiimentioning

confidence: 99%

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Application of Bioremediation on Solid Waste Management: A Review

SP¹

2014

J Bioremed Biodeg

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IntroductionAquatic ecosystems are mainly affected by heavy metals and represent a potential risk to the health of humans and ecosystems [1]. Heavy metal ions in the environment are biomagnified in the food chain and are accumulated in tissues. Although low concentrations of some heavy metals are metabolically important to many living organisms, at higher levels they can potentially be toxic [2].Arsenic (As) is a component of many industrial raw materials, products and wastes. Elevated levels of arsenic in drinking water have been implicated in human diseases and mortality [3]. Chronic exposure to arsenic causes neurological and haematological toxicity [4]. Arsenic impacts the major organs and is a potential carcinogen [5][6][7]. The most common arsenic species observed in the environment are the trivalent form arsenite As (III) and pentavalent form arsenate As (V) in which As (III) is more toxic than As (V) [8]. Because arsenic readily changes valence state and reacts to form species with varying toxicity and mobility, effective treatment of arsenic can be challenging. Arsenic treatment technologies require peroxidation step to form As (V) from As (III) [9] but the cost and secondary product formation during other conventional methods reduce the practices [10]. Use of biological processes provides a means for cost-effective removal of metals for the treatment of metal contaminated waters.Microbes are ideal candidates to decrease the heavy metal ion concentration from ppm to ppb levels [11]. Microalgae are known to sequestrate heavy metals due to their cell wall constituents which act as binding sites for metals [12][13][14][15][16][17]. Bioaccumulation of metals by algae may create a feasible method for remediating water contaminated with metals [18,19]. It is well established that several marine and fresh water algae are able to take up various heavy metals selectively from aqueous media and to accumulate these metals within their cells [20][21][22]. Microalgae have been shown to accumulate arsenic and could potentially remediate through adsorption and biotransformation of inorganic arsenic [23][24][25].In this study, the emphasis has been laid to know the efficiency of fresh water algal species in removing the arsenic from aqueous solutions. The research was to simultaneously determine the differences in arsenate and arsenite sorption capacities of living and dried algal biomass. Materials and Methods Sample collection and identificationAlgal samples were collected from Bangalore fresh water habitats (13°04'N, 77°58'E) and washed several times with tap water and then with deionized water before analysed by using microscope. The family and genus identified with reference to the biology of algae [26]. The identified algae were Chlorophyceae (Botryococcus, Chlamydomonas, Chlorella, Gonium, Pandorina, Scenedesmus, Spirogyra, Volvox), Cyanophyceae (Oscillatoria, Spirulina) and Euglenophyceae (Phacus). ChemicalsAll chemicals used in this study were of analytical reagent grade. Stock solutions of 100 mg/L concentra...

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Exopolysaccharides from cyanobacteria and their possible industrial applications

Colica

Philippis

2013

Cyanobacteria

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Utilisation of native, heat and acid-treated microalgae Chlamydomonas reinhardtii preparations for biosorption of Cr(VI) ions

Cited by 142 publications

References 42 publications

Untitled

Untitled

Application of Bioremediation on Solid Waste Management: A Review

Exopolysaccharides from cyanobacteria and their possible industrial applications

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