Sorption potential of impregnated charcoal for removal of heavy metals from phosphoric acid.
The viability of some heavy ions removal from phosphoric acid solution by means of impregnated charcoal with triphenylphosphine sulphide extractant has been demonstrated in this work. Factors affecting removal of Cu(2+), Cd(2+), Zn(2+)and Pb(2+) include initial concentration of ions, volume of the aqueous solution to weight of adsorbent ratio (V/m), concentration of the extractant loaded onto charcoal and temperature. The removal percent of these ions is increased by decreasing values of V/m ratio and increasing temperature for all ions. The sorption isotherms data fit Langmuir, Freundlich and Dubinin-Radushkviech (D-R) models. The values of the mean free energy, E(a), of sorption is in all cases in the range 9.1-25.6 kJ/mol, which are within the ranges of chemical sorption reaction. The sorption reaction was found to obey a pseudo second-order rate model.
El-Sofany
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EA
Hot Laboratory Center, Atomic Energy Authority, Cairo, Egypt. bosycat_19902000@yahoo.com
Zaher
W F
WF
Aly
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HF
D000327:Adsorption; D002606:Charcoal; D007202:Indicators and Reagents; D019216:Metals, Heavy / Q000302:isolation & purification*; D010756:Phosphoric Acids / Q000737:chemistry*; D012996:Solutions; D013696:Temperature; D013816:Thermodynamics
D007202:Indicators and Reagents; D019216:Metals, Heavy; D010756:Phosphoric Acids; D012996:Solutions; D002606:Charcoal; C030242:phosphoric acid