REMOVAL OF ACID ORANGE 7 FROM AQUEOUS SOLUTIONS BY NANOSIZED IRON OXIDE IMMOBILIZED ON PERLITE

The removal of acid orang 7 (AO7) from aqueous solution by adsorption process onto nanosized iron oxide immobilized on perlite (NIO-P) is novel,effective and easy way. In this work, the effectiveparameters on removal of AO7 by adsorption process, which included the amount of NIO-P (m),initial concentration of AO7 (C0), contact time, pHand temperature (T), were investigated. It was found that the content of adsorption followed decreasingorder: m=0.8>0.6>0.4>0.2>0.1 g, C0=35>30>25>20>15 mg.l-1, pH=5>6>7>8>9 and T=15>20>25>30>35 oC. The value of activationenergy (Ea) was found to be 13.56 KJ.mol-1.