Excessive malachite green content in water will cause great harm to the environment.The modified carbon materials were prepared by using sycamore leaf as carbon source and nitric acid and potassium hydroxide as modifiers.The adsorption value of carbon material modified by KOH(KC) was higher than that of carbon material modified by nitric acid(NC).The adsorption value of KC for malachite green reached 1.02mmol/g at 30℃.The pH value had significant influence on adsorption effect of KC.The higher the pH value,the greater the adsorption capacity.The adsorption value reached 1.07mmol/g when pH was 11.The adsorption process was basically balanced at 90min.The adsorption of KC was an exothermic process.The adsorption followed the Langmuir model,and was dominated by physical adsorption.
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