泡沫镍/铁粉脱氯降解莠去津

The dechlorination degradation of atrazine by foam nickel/iron powder

在 Ni/Fe 二元金属粉末脱氯降解莠去津的基础上,为了减少镍的流失对环境产生的二次污染,采用泡沫镍/铁粉体系作为还原剂,研究其对莠去津的脱氯效率,并和铁粉、Ni/Fe 二元金属体系的催化特性进行了比较.结果表明,在相同的反应条件下(pH 2.0,莠去津初始浓度20.0mg/L),泡沫镍为 1.0g,铁粉添加量分别为 2.0,3.0,5.0g 时,反应 90min,脱氯效率分别增加 14.11%、15.97%、29.50%;泡沫镍+铁粉分别为0+5.0g、0.5g+5.0g、1.0g+5.0g、1.95g+5.0g 时,莠去津 90min 的脱氯效率分别为 52.76%、80.13%、82.26%、65.25%.但是与 Ni/Fe 二元金属相比,催化性能要低得多,这可能与泡沫镍/铁粉体系的比表面积下降有关.

On the basis of the dechlorination degradation of atrazine by Ni/Fe bimetallic powder, in order to decrease the second environmental pollution of nickel's run off, the foam nickel/iron powder system was adopted as reducer to study its dechlorination efficiency of atrazine, and compare with the catalytic characters of iron powder, Ni/Fe bimetallic system. Under same reaction conditions (pH=2.0, C0=20.0 mg/L), the dechlorination efficiency increased 14.11%, 15.97%, 29.50% respectively in 90 min when foam nickel was 1.0 g, adding amount of iron powder was 2.0, 3.0, 5.0 g respectively; and the dechlorination efficiency of atrazine in 90 min was 52.76%, 80.13%, 82.26%, 65.25% when foam nickel+iron powder was 0 + 5.0 g, 0.5 g + 5.0 g, 1.0 g + 5.0 g and 1.95 g + 5.0 g respectively; but still much lower than Ni/Fe bimetallic system, thus might be related with the lowering of the specific surface of the foam nicked/iron powder system.