摘要：s one of the major oxidation intermediates generated in advanced oxidation processes, 1,4-benzoquinoneis proved to be highly toxic. Adsorptive removal of 1,4-benzoquinone by sugarcane bagasse, a low-costagricultural waste, was systematically investigated. It was observed that most of the adsorption occurredwithin the initial 30 min. The results showed that Elovich kinetic model could better describe the kinetic dataunder all the solution pH conditions examined by non-linear regressive method. Pseudo-second-order kineticmodel apparently fitted the experimental data better than pseudo-first-order kinetic model when using linearsimulation method. The adsorption process was highly pH dependent, with the greatest adsorption occurringunder neutral pH condition, and the highest uptake of 4.5 mg/g was achieved at pH 8.0. Ionic strength testindicated that 1,4-benzoquinone adsorption might form outer-sphere surface complexes with sugarcanebagasse. Natural organic matter (humic acid) significantly inhibited the uptake of 1,4-benzoquinone ontosugarcane bagasse. The study showed that sugarcane bagasse has a great potential application for theadsorptive removal of toxic 1,4-benzoquinone.
