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Advanced material and approach for metal ions removal from aqueous solutions.

Turhanen PA, Vepsäläinen JJ, Peräniemi S - Sci Rep (2015)

Bottom Line: The method is based on a resin free, solid, non-toxic, microcrystalline bisphosphonate material, which has very low solubility in water (59 mg/l to ion free Milli-Q water and 13 mg/l to 3.5% NaCl solution).The material has been produced almost quantitatively on a 1 kg scale (it has been prepared also on a pilot scale, ca. 7 kg) and tested successfully for its ability to collect metal cations from different sources, such as ground water and mining process waters.This material has several advantages compared to the currently used approaches, such as no need for any precipitation step.

View Article: PubMed Central - PubMed

Affiliation: School of Pharmacy,Biocenter Kuopio, University of Eastern Finland, P.O.Box 1627, FI-70211, Kuopio, Finland.

ABSTRACT
A Novel approach to remove metals from aqueous solutions has been developed. The method is based on a resin free, solid, non-toxic, microcrystalline bisphosphonate material, which has very low solubility in water (59 mg/l to ion free Milli-Q water and 13 mg/l to 3.5% NaCl solution). The material has been produced almost quantitatively on a 1 kg scale (it has been prepared also on a pilot scale, ca. 7 kg) and tested successfully for its ability to collect metal cations from different sources, such as ground water and mining process waters. Not only was this material highly efficient at collecting several metal ions out of solution it also proved to be regenerable and reusable over a number of adsorption/desorption, which is crucial for environmental friendliness. This material has several advantages compared to the currently used approaches, such as no need for any precipitation step.

No MeSH data available.


The effect of contact time onto the removal per cents (R-%) of metal ions from MWP1 sample by N10O (A) and Diphonix® (D).
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f4: The effect of contact time onto the removal per cents (R-%) of metal ions from MWP1 sample by N10O (A) and Diphonix® (D).

Mentions: The contact time can have a major impact on the removal of metals ions: the structure of the ligand material (N10O) is porous material probably containing different sizes of pores whereas in Diphonix® the resin complexing groups are present on the surface of the resin particles) and sample composition (metal ions and their concentrations) may affect the time needed to reach a state of equilibrium. The effect of contact time on the collection of metal ions was studied with MPW1 sample. With N10O (10 g/l) a longer contact time was advantageous, since the removal efficacies systematically increased with increasing contact time regardless of metal ion (Figure 4). This may be due to the porous structure of N10O as diffusion of metal ions inside the material requires more time. Instead, with Diphonix® resin, the increase of contact time improved the removal of MgII, CaII, Fe, Al and CuII ions from sample solution, but meanwhile reduced the removal of CdII, CoII, MnII, NiII and ZnII ions. This behaviour may be a result of competition of metal ions for complexation sites on the surface of resin particles and long contact time may be disadvantageous if the removal of latter ions is desired.


Advanced material and approach for metal ions removal from aqueous solutions.

Turhanen PA, Vepsäläinen JJ, Peräniemi S - Sci Rep (2015)

The effect of contact time onto the removal per cents (R-%) of metal ions from MWP1 sample by N10O (A) and Diphonix® (D).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4355739&req=5

f4: The effect of contact time onto the removal per cents (R-%) of metal ions from MWP1 sample by N10O (A) and Diphonix® (D).
Mentions: The contact time can have a major impact on the removal of metals ions: the structure of the ligand material (N10O) is porous material probably containing different sizes of pores whereas in Diphonix® the resin complexing groups are present on the surface of the resin particles) and sample composition (metal ions and their concentrations) may affect the time needed to reach a state of equilibrium. The effect of contact time on the collection of metal ions was studied with MPW1 sample. With N10O (10 g/l) a longer contact time was advantageous, since the removal efficacies systematically increased with increasing contact time regardless of metal ion (Figure 4). This may be due to the porous structure of N10O as diffusion of metal ions inside the material requires more time. Instead, with Diphonix® resin, the increase of contact time improved the removal of MgII, CaII, Fe, Al and CuII ions from sample solution, but meanwhile reduced the removal of CdII, CoII, MnII, NiII and ZnII ions. This behaviour may be a result of competition of metal ions for complexation sites on the surface of resin particles and long contact time may be disadvantageous if the removal of latter ions is desired.

Bottom Line: The method is based on a resin free, solid, non-toxic, microcrystalline bisphosphonate material, which has very low solubility in water (59 mg/l to ion free Milli-Q water and 13 mg/l to 3.5% NaCl solution).The material has been produced almost quantitatively on a 1 kg scale (it has been prepared also on a pilot scale, ca. 7 kg) and tested successfully for its ability to collect metal cations from different sources, such as ground water and mining process waters.This material has several advantages compared to the currently used approaches, such as no need for any precipitation step.

View Article: PubMed Central - PubMed

Affiliation: School of Pharmacy,Biocenter Kuopio, University of Eastern Finland, P.O.Box 1627, FI-70211, Kuopio, Finland.

ABSTRACT
A Novel approach to remove metals from aqueous solutions has been developed. The method is based on a resin free, solid, non-toxic, microcrystalline bisphosphonate material, which has very low solubility in water (59 mg/l to ion free Milli-Q water and 13 mg/l to 3.5% NaCl solution). The material has been produced almost quantitatively on a 1 kg scale (it has been prepared also on a pilot scale, ca. 7 kg) and tested successfully for its ability to collect metal cations from different sources, such as ground water and mining process waters. Not only was this material highly efficient at collecting several metal ions out of solution it also proved to be regenerable and reusable over a number of adsorption/desorption, which is crucial for environmental friendliness. This material has several advantages compared to the currently used approaches, such as no need for any precipitation step.

No MeSH data available.