Nature Environment and Pollution Technology

Lingfeng Zhu ¹, Weiyong Zhu ¹, Xiaoqi Chai ¹, Yingying Li ¹, Guoting Li ¹

Affiliations
1 Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, CN

Abstract

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

Keywords

Sugarcane Bagasse, 1,4-Benzoquinone, Biosorption, Kinetics, Water Purification.

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