Uptake of 203Hg++ and 115 mCd++ by Chlamydomonas reinhardi under various conditions

Macka, Wolfgang; Wihlidal, H.; Stahlik, Gerhard; Washüttl, J.; Bancher, E.

doi:10.1016/0045-6535(79)90040-7

Cited by 15 publications

(6 citation statements)

References 7 publications

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“…Radiotracer techniques have been used in conjunction with electrochemical polymerization to follow the motion of counter-and co-ions during electro-polymerization and the direct investigation of the sorption process (Gyorgy and Gyorgy 1989). A composite of consisting of organic conductors and anionic-type insulating polymers, described as a 'chargecontrollable membrane' with cation-exchange properties, has been shown to have considerable application for water deionization (Penner and Martin 1986;Shimidzu et al 1986Shimidzu et al ,1987aBidan and Ehui 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Although a large number of separation methods are available, the process of adsorption is the most versatile and plays a significant role in the removal of heavy metal contamination from water bodies (Stankovic et al 1990;Krishnan et al 1987). Several polymers, clay minerals, dead biomass and metal oxides have been used as adsorbents (Mishra et al 1996;Volesky 1988;Mocka et al 1979).…”

Section: Introductionmentioning

confidence: 99%

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Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study

Gupta

Shankar

2004

Adsorption Science & Technology

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A radiotracer technique was used to study the removal of Hg(II) ions from aqueous solutions by polyaniline. It was shown that an increase in the concentration of the adsorptive (10 -10 −2 M), whereas the Langmuir isotherm was followed only at moderate concentrations. Thermal data showed that this process was endothermic in nature. The radiation stability of polyaniline was also investigated by exposing it to an 11.1 GBq (Ra/Be) source associated with a γ-dose of 1.72 Gy/h. Irradiation had practically no significant effect on the adsorption capacity of polyaniline. Desorption experiments showed that the process of Hg(II) ion adsorption by polyaniline was almost irreversible and chemisorptive in nature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study

Gupta

Shankar

2004

Adsorption Science & Technology

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“…Les capacités de déphosphatation et de dénitrification des trois espèces algales ont été testées par les dosages des nitrates, orthophosphates et ammonium au début et à la fin des expériences, suivant les méthodes colorimétriques (RODIER, 1996), en utilisant un spectrophotomètre UV-visible à double faisceau de type Cecil 9000. La croissance algale a été suivie par un comptage quotidien au microscope optique à l'aide d'un hemacytometre « Thoma », suivant la méthode décrite par MACKA et al (1979).…”

Section: Analysesunclassified

Étude de l'absorption des phosphates, azote, chrome et cadmium par trois algues vertes isolées à partir d'effluents urbains

Zerhouni¹,

Bouya²,

Ronneau³

et al. 2005

rseau

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La capacité de déphosphatation et de dénitrification ainsi que la sensibilité et l'accumulation de deux métaux lourds (Cr et Cd) de Scenedesmus quadricauda, Chlorella pyrenoidosa et Chlamydomonas reinhardtii isolées des eaux usées de la ville de Fès, ont été étudiées dans les conditions de laboratoire. Les résultats ont montré que S. quadricauda présente les meilleurs taux de réduction des phosphates (83%), et d'ammonium (75%). L'étude de la sensibilité vis à vis du chrome et du cadmium des trois espèces, a montré qu'au delà d'une concentration de 1 ppm, la croissance se trouve réduite et que S. quadricauda présente une sensibilité plus faible que les deux autres espèces. Les résultats des expériences d'absorption conduites avec du chrome VI marqué au51 Cr et du cadmium marqué au109 Cd ont montré que les quantités de chrome et du cadmium prélevées par S. quadricauda dépassent celles des deux autres espèces. L'utilisation potentielle des trois espèces dans le traitement des effluents urbains est discutée à la lumière des résultats de ces expériences.Wastewater discharge is an environmental problem, especially in developing countries. Biological wastewater treatment seems to be an alternative for these countries due to its low cost. Algae are used in such wastewater treatment systems in many parts of the world. In addition to preventing environmental damage, the reuse of treated wastewater can be an alternative water supply in arid regions and during drought periods.In this paper, three algal (Chlamydomonas reinhardtii, Chlorella pyrenoïdosa and Scenedesmus quadricauda) species were isolated from an urban effluent collected from a Mediterranean city (Fez, Morocco, situated between 4° to 7° W and 33° to 35° N) and their ability to remove phosphate and nitrogen was tested under laboratory conditions. The toxicity and uptake of chromium and cadmium were also studied.Fez city wastewater was sampled monthly during one year (2000) at three main stations located along the Boukhrareb stream which crosses the city. The following parameters were measured according to methods described by RODIER J. (1996): Chemical oxygen demand, COD; Biological oxygen demand, BOD; NO3 -; NH4 +; PO43 -; electrical conductivity (EC) and organic matter. Heavy metals (Cr, Fe and Zn) were measured by INAA (Instrumental Thermal Neutron Activation Analysis) in wastewater samples dried on Teflon sheets at 70°C.The collected samples were incubated under controlled conditions and species of alga were identified, isolated, and then transferred to fresh culture medium. Chlamydomonas reinhardtii, Chlorella pyrenoïdosa and Scenedesmus quadricauda were chosen for these experiments because of their abundance in wastewater over the year and for their capacities for biomass production. The removal of nutrients from aqueous media was studied by using monospecific cultures. Algae were in the exponential growth phase when the experiments were started and BG11 culture medium was used under standard growth conditions. Initial concentrations of phosphate and nitrog...

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“…Although alarge number of separation methods are available, the process of adsorption is the most versatile and plays a significant role in removal of heavy metal contamination from water bodies [1][2][3]. Several polymers, clay minerals, dead biomass and metal oxides have been used as adsorbents [4][5][6][7]. Considerable attention was given in recent years for the removal of heavy metal toxic ions such as chromium, nickel, cadmium, zinc, etc.…”

Section: Introductionmentioning

confidence: 99%

Investigation the effect of time detention on the removal of chromuim from aqueous solution by using polyaniline∕polystyrene nanocomposite

Eisazade¹,

Davodi²,

Lashkenari³

2010

AIP Conference Proceedings

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In this study Polyaniline/polystyrene nanocomposites were prepared in the aqueous solution by using ammonium peroxy disulfate as an oxidant in the presence of poly (vinyl pyrrolidone) as surfactant. Morphology and chemical structure was characterized by using scaning electron micrograph(SEM), fourier transform infrared (FTIR) spectrometer and removal percentage obtained by using mass atomic absorption.

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Uptake of 203Hg++ and 115 mCd++ by Chlamydomonas reinhardi under various conditions

Cited by 15 publications

References 7 publications

Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study

Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study

Étude de l'absorption des phosphates, azote, chrome et cadmium par trois algues vertes isolées à partir d'effluents urbains

Investigation the effect of time detention on the removal of chromuim from aqueous solution by using polyaniline∕polystyrene nanocomposite

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