Chemical modification and metal binding studies of Datura innoxia

Article Abstract:

Carboxylate groups are essential in metal ion adsorption to Datura innoxia. This was indicated by findings that the esterification of carboxylate functionalities found in the cell walls of Datura innoxia leads to a decrease of as much as 40% in metal uptake, depending on the metal studied. A slight increase in metal ion uptake for Cu2 and Sr2 and a decline in uptake for Cd2 resulted from base hydrolysis of the biomaterial. These are due to the hydrolysis of esters native to the plant material.

Physiological aspects, Binding sites (Biochemistry), Active sites (Biochemistry), Adsorption

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Characterization of carboxylate the groups on Datura innoxia using Eu(III) luminescence

Article Abstract:

Two different carboxylate groups are responsible for the binding of Cu(II), Eu(III), Gd(III) and Cd(II) ions to Datura innoxia cell walls. The first group binds to metal ions in a 1:1 ratio. The second binds the ions at a 2:1 ratio. Fluorescence lifetime data is analyzed using inter- and intramolecular energy-transfer processes. Nonliving biomass consisting of higher plants such as Datura may be as promising as algae as an industrial tool for the removal of metal ions from wastewater.

Sewage, Extraction (Chemistry), Europium, Biological sewage treatment

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Characterization of Cd binding sites on Datura innoxia using 113Cd NMR spectrometry

Article Abstract:

Nonliving biomass materials such as algae can help recover toxic metals from mining and industrial wastewaters through biosorption of metal ions onto cell walls. Experiments with Datura innoxia examined metal adsorption by higher plant cells to help understand the chemical mechanisms responsible for metal ion binding. NMR spectroscopy was used to measure the binding of cadmium(II) to Datura cell walls.

Usage, Nuclear magnetic resonance spectroscopy

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