纳米碳管在电解法处理含铜废水中的应用研究

Electrolysis Treatment of Cu^(2+)-containing Wastewater Using Carbon Nanotube Co-deposits as the Cathode

为了解决含铜工业废水对环境、土壤及生物的危害,以镀有纳米碳管的钢板为阴极,对含铜废液进行了电解研究。测定了不同影响因素下(电解时间及电流等)重金属铜的去除率,并分析了含纳米碳管阴极电解法去除Cu2+的机理。结果表明,在其他条件相同的条件下,随着时间和电流的增加,去除率逐渐上升。而且随钢板上纳米碳管的数量升高,去除率明显升高。在试验最佳情况下,含有纳米碳管的阴极钢板比没有含有纳米碳管的阴极钢板去除率高40%左右。

In order to eliminate the detrimental impacts of nickel ions-containing industrial wastewater on the environment, soil and organisms, this article conducted a study on removing nickel ions from the water through electrolysis technique using carbon nanotube-containing co-deposit as the cathode. The ion removal efficiency of carbon nanotube-containing cathode produced by co-deposition with different depositing period of time was detected and desirable electrolysis parameters （e.g. time and current density） were determined. The results showed that under the same conditions, with the increase in electrolysis time and current density, the removal efficiency of nickel ions in the water goes up significantly while a more remarkable increase could be observed with the increase of co-depositing period during which nanotube was planted. A maximum 50% higher efficiency over that of cathode containing no carbon nanotube could be obtained, which was believed to result from the increased cathode surface area due to the introduction of electro-conductive carbon nanotube on its surface.