改性碳纳米管对水中铜离子的去除作用

摘要

Carbon nanotubes ( CNT) were modified by oxidation with sodium hypochlorite solutions (NaClO) and were employed as adsorbents to study the adsorption characteristics of copper from water.The results showed that the removing effect of the modified CNT for Cu2 + is much better than that of the as-grown ones.The adsorption for Cu2+ reached equilibrium by about 60 min.The pH value has much impact on Cu2+ removing.The adsorption isotherm is in accord with both Langmuir and Freundlich equations.%采用次氯酸钠氧化法改性碳纳米管,用于吸附水溶液中铜离子.结果表明,改性碳纳米管对水中铜离子的去除效果明显高于未改性的碳纳米管,纯化的碳纳米管对水中铜离子的吸附在60 min左右达到平衡;溶液pH值对水中铜离子的去除有较大的影响.吸附等温线既符合Langrnuir吸附等温式.又符合Frcundllch等温式.