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tonat perox (ii) tr een t obtained from the fruit peel waste. It is usually epoxidised via catalyst activity regarding the oxidation of unsaturated hydrocarbons is based on Co(III), which is formed during Catalysis Today 102–103 (2of products, such as pharmaceuticals, perfumes and food additives. Limonene epoxidation may be obtained either by allylic oxidation or by epoxidation reaction. Allylic oxidation takes place usually via a free radical chain reaction pathway; it generally occurs when the intermediate metallic species are in a low oxidation state [1]. On the other hand, epoxide formation is more likely to occur when oxometallic species, like O MnV, O RuVIII, among others, are present [2]. However, both mechanisms may occur simultaneously, since other variables than the nature of the metallic species (e.g. the stability of the radicals formed), must be taken into account. radical cation [4]. Transition metal complexes have been extensively used in homogeneous catalysis; however, separation of the catalysts is usually troublesome. To overcome this limitation, metal complexes have been immobilised in several supports. Numerous attempts have been made to immobilise homogeneous Schiff base complexes, such as, anchoring these complexes on a polymeric matrix [5]. Encapsulation [6–8], entrapment [9] and anchoring of metal bases onto porous inorganic supports [10,11] have also been reported. Activated carbons can satisfy most of the desirable requirements for a suitable support: high surface area and good porosity, chemical inertness, stability, mechanical resistance. Activated carbons with different characteristic