Synthesis and characterization of selective thiourea modified Hg(II) ion-imprinted cellulosic cotton fibers.
In the present study, Hg(2+) ion-imprinted chelating fibers based on thiourea modified natural cellulosic cotton fibers (Hg-C-TU) were synthesized and characterized using some instrumental techniques such as elemental analysis, scanning electron microscopy (SEM), FTIR, wide angle X-ray and XPS spectroscopy. The modified Hg-C-TU fibers were employed for selective removal of Hg(2+) from aqueous solution. Effect of some essential parameters such as pH, temperature, adsorption times and adsorbate concentration were examined to evaluate the optimum adsorption condition. The adsorption kinetics followed the second-order kinetic model indicating that the chemical adsorption is the rate limiting step. Also, the adsorption isotherm experiments showed the best fit with Langmuir model with maximum adsorption capacities 110.3 and 61.8 mg/g for both Hg-C-TU and NI-C-TU, respectively.
Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt. Electronic address: monierchem@yahoo.com.
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M
Monier
Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
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IM
Kenawy
Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
M A
MA
Hashem
D002482:Cellulose / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry*; D032561:Cotton Fiber; D005029:Ethylenediamines / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008628:Mercury / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification; D008855:Microscopy, Electron, Scanning; D010504:Periodic Acid / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013890:Thiourea / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification; D014961:X-Ray Diffraction
D002614:Chelating Agents; D005029:Ethylenediamines; D014874:Water Pollutants, Chemical; D010504:Periodic Acid; C031234:ethylenediamine; D002482:Cellulose; C009288:metaperiodate; D008628:Mercury; D013890:Thiourea
Cellulose; Cotton fibers; Ion-imprinting; Thiourea