Sorption of dissolved inorganic and organic phosphorus compounds onto iron-doped ceramic sand

摘要: Abstract Sorption-based processes are widely used in the wastewater treatment. We present results of a study contrasting sorption behavior several dissolved organic phosphorus (DOP) compounds and phosphate onto three ceramic sands with different physicochemical properties. The synthesized sorbent materials were characterized by nitrogen adsorption analyses, X-ray diffraction (XRD) infrared spectroscopy (FTIR). DOP chosen to represent molecular weights structures. effects solution pH, P concentration contact time on capacity was investigated kinetic equilibrium isotherm studies. order maximum observed for iron-doped sand samples, per gram dry weight basis, is (DIP) > β-glycerophosphate disodium salt hydrate (β-GP) > adenosine 5′-triphosphate (ATP-P). Langmuir equation well describes experimental isotherms. Kinetic studies revealed that process followed both pseudo-first pseudo-second models. samples had higher removal than raw, which could be attributed its better intra-particle diffusion binding energy. compound size structure, nature sorbents all appear play role dictating relative capacity. complex; surface simultaneously occurring contribute mechanism.