【摘要】 以H₃PO₄为活化剂制备甘蔗叶活性炭,采用正交实验对活性炭的制备工艺进行了优化,并研究了活性炭对含铬废水的吸附和再生性能。实验结果表明:在H₃PO₄体积分数为15%、H₂SO₄体积分数为6%、HC1体积分数为3%、活化温度为723 K、活化时间为0.58 h的工艺条件下,活性炭得率为35.07%,碘吸附值为1 207 mg/g。活性炭对Cr（Ⅵ）的最大平衡吸附量为30.89 mg/g,HNO₃再生后对Cr（Ⅵ）的最大平衡吸附量为39.48 mg/g;再生效率最高达87.41%,经3次再生,活性炭的再生效率仍能维持在80%以上。更多还原

【Abstract】 Activated carbon was prepared from sugarcane leaves using H₃PO₄ as activator.The preparation process was optimized by orthogonal experiments,and its adsorption capability for chromium ions in wastewater and regenerable property were studied.The experimental results show that:Under the conditions of H₃PO₄ volume fraction 15%,H₂SO₄ volume fraction 6%,HCl volume fraction 3%,activation temperature 723 K and activation time 0.58 h,the yield of the activated carbon is 35.07%,and its iodine adsorption value is 1 207 mg/g.The maximum equilibrium adsorption capacity of the activated carbon for Cr（VI） is 30.89 mg/g,and that of the HNO₃-regenerated activated carbon is 39.48 mg/g;The maximum regeneration efficiency can reach 87.41%,and above 80%of regeneration efficiency can be kept after 3 times of regeneration.更多还原