硅藻土-沸石复合吸附剂去除水体中氮磷的试验研究

Study of Diatomite-zeolite Compound Absorbent for Nitrogen and Phosphorus Adsorption from Aqueous Solution

本文主要通过静态吸附试验研究了硅藻土-沸石作为复合吸附剂对氮磷废水的处理效率,试验结果表明:与硅藻土或沸石相比,复合吸附剂对氮磷具有较强的吸附能力。吸附试验的最佳条件为:对于该吸附剂去除氨氮,pH=8,初始浓度为40 mg/L,吸附时间为350 min,吸附剂用量20 g/L;对于该吸附剂去除磷,初始浓度为5 mg/L,吸附时间为120 min,吸附剂用量20 g/L。

The diatomite-zeolite, as a kind of absorbents, was used to deal with the wastewater which contains nitrogen and phosphorus, by a series of static adsorption experiments, and the removal rate was studied. The results indicated that the compound absorbent had a better adsorption capacity than diatomite or zeolite. The best condition of the adsorption experiment for the nitrogen was found to be that the pH was 8, the initial concentration was 40 mg/L, the adsorption time was 350 min, and the absorbents dosage was 20 g/L, while that for the phosphorus was that the initial concentration was 5 mg/ L, the adsorption time was 120 rain, and the absorbents dosage was 20 g/L.