Study on the reductive degradation of nitrobenzene wastewater by copper-aluminum bimetallic material
Copper-aluminum bimetallic material(Cu@Al0)was prepared by electroless copper plating on waste aluminum foil.The obtained Cu@Al0 was applied to reductive degradation of nitrobenzene wastewater.The prepared material was characterized by XRD and SEM.The effects of copper plating rates,initial pH,material dosage and initial nitrobenzene concentration on nitrobenzene degradation efficiency were systematically investigated.Finally,the reductive degradation mechanism of Cu@Al0 for nitrobenzene was further revealed by UV-Vis and GC instrumental analysis methods.The results showed that copper was successfully loaded on the surface of the aluminium foil.When the copper loading rate of Cu@Al0 was 3.43％,initial pH was 3,material dosage was 0.50 g,initial mass concentration of nitrobenzene was 100 mg/L,nitrobenzene degration rate could reach 88.4％after 20 min of reaction.The degradation of nitrobenzene by Cu@Al0 was a stepwise reduction process from nitrosobenzene to hydroxyaniline and finally to aniline.An increase of the initial pH affected the reduction process of intermediate product nitrosobenzene to the final product aniline.
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