Introduction: Benzene is a volatile compound in petroleum products and a major concern is its carcinogenic effects. The purpose of this study was to survey benzene removal ability of multi-walled carbon nano tubes by surface modified with calcium hypochlorite and sodium hypochlorite from aqueous solution. Methods:The removal of benzene was evaluated by aqueous solution by hybrid multi-walled carbon nano tubes modified surface by calcium hypochlorite, and nano-silica, and multi walled carbon nano tubes(MWCNT) and its modified surface by calcium hypochlorite (MWCNT(Ca(OCl)2)) and nano-silica. Synthetic samples were analyzed by GC. Conclusion: In this study, nano materials dose of 0.5 g/l, contact time (1hr and 2hr) with benzene concentration of 100 mg/l , and pH 7 were chosen. The equilibrium amount (qe) and removal efficiency (R) for benzene were 192.46 mg/g and 96.23% respectively, with HCNT higher than (MWCNT(Ca(OCl)2)) (qe =188.58R=%94.92) nano-silica.(qe =182.6R=%91.3) Conclusion: The HCNT can effectively adsorb benzene from water and can thus be used as efficient adsorbents to purify waters and wastewaters pollutants by petrochemicals

Keywords: : Hybrid Modified Carbon Nano Tube, Nano-Silica, Benzene, Aqueous Solution, Calcium Hypochlorite.

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