采用氩电弧等离子体法制备炭包铁纳米粒子,并用体积分数30％的H2O2氧化其外层非晶态类石墨碳层,研究炭包铁纳米粒子对水溶液中Cr、Ni 、Cd 、Pb、Co和Mn等金属离子的吸附和分离特性.结果表明,炭包铁非晶炭层的特殊结构可通过双氧水氧化处理使其表面产生羧基和羟基.在强碱性介质下,羟基和羧基强化了纳米颗粒表面的静电作用,提高了炭包铁对金属离子的吸附性能.当pH值为8.0 ～10.0时,炭包铁纳米粒子对Cr、Ni、Cd、Pb、Co和Mn的吸附率均超过90％,对重金属离子的吸附能力明显高于活性炭.
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