Removal of heavy metals from water effluents using supermacroporous metal chelating cryogels.
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Onnby L, Giorgi C, Plieva FM, Mattiasson B
Removal of heavy metals from water effluents using supermacroporous metal chelating cryogels.
Biotechnol Prog. 2010 Sep-Oct;26(5):1295-302. doi: 10.1002/btpr.422.
- PubMed ID
- 20945486 [ View in PubMed]
- Abstract
Applications of IDA in, for example, immobilized metal ion affinity chromatography for purification of His-tagged proteins are well recognized. The use of IDA as an efficient chelating adsorbent for environmental separations, that is, for the capture of heavy metals, is not studied. Adsorbents based on supermacroporous gels (cryogels) bearing metal chelating functionalities (IDA residues and ligand derived from derivatization of epoxy-cryogel with tris(2-aminoethyl)amine followed by the treatment with bromoacetic acid (defined as TBA ligand)) have been prepared and evaluated on capture of heavy metal ions. The cryogels were prepared in plastic carriers, resulting in desired mechanical stability and named as macroporous gel particles (MGPs). Sorption and desorption experiments for different metals (Cu(2)+, Zn(2)+, Cd(2)+, and Ni(2)+ with IDA adsorbent and Cu(2)+ and Zn(2)+ with TBA adsorbent) were carried out in batch and monolithic modes, respectively. Obtained capacities with Cu(2)+ were 74 mumol/mL (TBA) and 19 mumol/mL gel (IDA). The metal removal was higher for pH values between pH 3 and 5. Both adsorbents showed improved sorption at lower temperatures (10 degrees C) than at higher (40 degrees C) and the adsorption significantly dropped for the TBA adsorbent and Zn(2)+ at 40 degrees C. Desorption of Cu(2)+ by using 1 M HCl and 0.1 M EDTA was successful for the IDA adsorbent whereas the desorption with the TBA adsorbent needs further attention. The result of this work has demonstrated that MGPs are potential treatment alternatives within the field of environmental separations and the removal of heavy metals from water effluents.
DrugBank Data that Cites this Article
- Drug Targets
Drug Target Kind Organism Pharmacological Action Actions Edetate calcium disodium anhydrous Lead Small molecule Humans YesChelatorDetails Edetate disodium anhydrous Lead Small molecule Humans YesChelatorDetails Edetic acid Lead Small molecule Humans YesChelatorDetails