水体中的孔雀石绿含量过高会对环境造成巨大伤害。以法国梧桐叶为碳源,分别通过硝酸、KOH为改性剂制备出改性碳材料。结果表明:KOH改性碳材料(KC)的吸附效果优于硝酸改性材料(NC)。在30℃时KC对孔雀石绿吸附效果最好,达到1.02mmol/g。pH对KC吸附效果影响显著,pH越大吸附量越大。当pH为11时吸附量达到1.07mmol/g。吸附过程在90min时吸附基本趋于平衡。KC对孔雀石绿的吸附是一个放热过程;该吸附遵循Langmuir模型,主要以物理吸附为主。
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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