Accumulation of toxic metal ions on cell walls ofDatura innoxia suspension cell cultures

Jackson, Paul J.; Anderson, Wendy L.; DeWitt, Jane G.; Ke, Huei-Yang D.; Kuske, Cheryl R.; Moncrief, Robyn M.; Rayson, Gary D.

doi:10.1007/bf02632038

Cited by 8 publications

(7 citation statements)

References 22 publications

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“…As shown, metal concentrations reach an approximately constant value for reaction times of about 5 min. This short time re- quired for biosorption is in accordance with the results given by other researchers such as Jackson et al [26], Tsezos and Volesky [27,28] or Huang et al [23] who reported contact times for complete biosorption in the same order of magnitude for similar biomass. In our case, a reaction time of 10 min was selected to ensure an optimum metal uptake.…”

Section: Reaction Timesupporting

confidence: 93%

“…Table 2 summarizes the numerical results of the Langmuir parameters K A and q max and the r 2 coefficient. The Pseudomonas putida (this work) Inactive 6.0 5.0-6.0 6.0-6.5 7.0-7.5 Pseudomonas putida II-11 [11] Active -8.0 --Pseudomonas aeruginosa PU 21 [12] Active 6.0 6.0 7.0 -Pseudomonas aeruginosa PU 21 [12] Inactive 6.0 6.0 6.0 -Rhizopus arrhizus [36] Active --5.0 -Penicillium chrysogenum [37] Active --4.5 -Saccharomyces cerevisiae [4] Active -6.5 --Saccharomyces cerevisiae [22] Active -5.5 --Saccharomyces cerevisiae [22] Inactive -6.5-8.5 --Aspergillus oryzae [23] Inactive 7.5-8.0 6.5 7.0 7.5 Datura innoxia [26] Active 5.0 5.0 --r 2 coefficient gives the amount of variance explained by the model, so it can be used to evaluate the goodness of fit. In all occasions, the variance not explained by the model (100(1-r 2 )) was lower than 3%, so the Langmuir model is adequate to describe the behaviour of the biosorption of metals on inactive Pseudomonas Putida.…”

Section: Biosorption Modelsmentioning

confidence: 99%

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Biosorption of cadmium, copper, lead and zinc by inactive biomass of Pseudomonas Putida

et al. 2003

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The accumulation of Cd(II), Cu(II), Pb(II) and Zn(II) at mg L(-1) concentration levels by inactive freeze-dried biomass of Pseudomonas Putida has been investigated. These metals could be efficiently removed from diluted aqueous solutions. A contact time of 10 min was sufficient to reach equilibrium. The pH has a strong effect on metal biosorption and the optimal pH values were 6.0, 5.0-6.0, 6.0-6.5 and 7.0-7.5 for Cd(II), Cu(II), Pb(II) and Zn(II) respectively. Under these conditions there was 80% removal for all metals studied. The process of biosorption can be described by a Langmuir-type adsorption model. This model accounts for 98% of the data variance. The K(A) and q(max) parameters for each metal are strongly correlated (at confidence levels greater than 98%) with the metal acidity, quantified by the constant of the corresponding M(OH)(+) complex, thus confirming previous assertions by other authors.

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Section: Reaction Timesupporting

confidence: 93%

Section: Biosorption Modelsmentioning

confidence: 99%

Biosorption of cadmium, copper, lead and zinc by inactive biomass of Pseudomonas Putida

et al. 2003

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“…One method currently being studied is the use of plant cells, living or dead, to accumulate metals from aqueous solutions (3)(4)(5)(6)(7)(8). Another method focuses on genetically altering plants to produce better phytoremediators (9).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Ability of Plants Found in Western Kentucky to Hyperaccumulate Lead and Aluminum from Soils

Weatherford

Hammond

Ratliff

1997

Microchemical Journal

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“…This plant is commonly found in the tailings of abandoned mines, which also demonstrates D. innoxia' s tolerance for heavy metals. Metal ion binding to D. innoxia at various pH values has been determined for Cu 2+ , Ag + , Ni 2+ , Cd 2+ , Eu 3+ , Sr 2+ , Ba 2+ , and UO 2 2+ ( − ). D. innoxia exhibits a pH-dependent metal binding profile with metal adsorption increasing from pH 1 to pH 6.…”

Section: Introductionmentioning

confidence: 99%

Chemical Modification and Metal Binding Studies of Datura innoxia

Drake

Lin

Rayson

et al. 1995

Environ. Sci. Technol.

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114

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The esterification of carboxylate functionalities present in the cell walls of Datura innoxia results in a decrease in metal uptake by as much as 40%, depending on the metal studied. These findings suggest that carboxylate groups are important in metal ion adsorption to this biomaterial. Base hydrolysis of the native plant material resulted in a slight increase in metal ion uptake for Cu2+ and Sr2+ and a decrease in uptake for Cd2+. These results are attributed to the hydrolysis of esters native to the plant material, which increases the carboxylate content but also results in conformational changes in the macromolecules that comprise the cell fragments. Both the esterified product and the hydrolyzed material were examined via infrared spectroscopy. A peak occuring at 1735 cm-1 (attributed to the carbonyl stretch) confirmed the esterification process. The infrared spectra of the hydrolyzed samples indicate further ionization of carboxylate groups or hydrolysis of esters native to D. innoxia.

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Accumulation of toxic metal ions on cell walls ofDatura innoxia suspension cell cultures

Cited by 8 publications

References 22 publications

Biosorption of cadmium, copper, lead and zinc by inactive biomass of Pseudomonas Putida

Biosorption of cadmium, copper, lead and zinc by inactive biomass of Pseudomonas Putida

Investigation of the Ability of Plants Found in Western Kentucky to Hyperaccumulate Lead and Aluminum from Soils

Chemical Modification and Metal Binding Studies of Datura innoxia

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