Analytical potential of fullerene as adsorbent for organic and organometallic compounds from aqueous solutions.
In this work, the analytical potential of C60 fullerene as a sorbent for organic and organometallic compounds from aqueous solutions was studied for the first time. Fullerene adsorbs many types of organic substances (e.g., N-methylcarbamates, phenols, polycyclic aromatic hydrocarbons, amines) with efficiencies that depend on the nature of the compound concerned and never exceed 60%. Conventional sorbents such as XAD-2 or polyurethane foam are more efficient than C60 for this purpose. Organometallic compounds (viz. metalocenes and organoleads) are quantitatively adsorbed on C60 via the formation of neutral complexes or chelates; the adsorption constant is dramatically increased by the use of classical reagents such as pyrrolidinedithiocarbamate or diethyldithiocarbamate. A complementary comparative study on the adsorption of organometallic complexes on RP-C18 and silica gel 100, among others, showed C60 to be superior as sorbent. All experiments in this work were carried out by using continuous flow configurations and gas chromatography-atomic absorption spectrometry techniques.
Ballesteros
E
E
Analytical Chemistry Division, Faculty of Sciences, University of Córdoba, Spain.
Gallego
M
M
Valcárcel
M
M
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D037741:Fullerenes; D009930:Organic Chemicals / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D012996:Solutions; D014867:Water
D037741:Fullerenes; D009930:Organic Chemicals; D009942:Organometallic Compounds; D012996:Solutions; D014867:Water; D002244:Carbon; C069837:fullerene C60