钠基膨润土对氨氮废水的处理

研究了经氯化钠改性的膨润土对氨氮废水的处理,比较了经不同浓度的氯化钠溶液改性的膨润土在各种条件下对氨氮废水的处理效果。实验表明,经1%的氯化钠溶液改性的膨润土在搅拌时间为40min,膨润土用量为5g,pH值为8～9,室温时处理浓度为160mg/L的氨氮废水100mL效果最佳,最高去除率可达93.78%,处理后的氨氮废水可达到国家一级排放标准(15mg/L)。同等条件下,用该方法改性的膨润土对氨氮废水的处理效果好于粉煤灰。

Treatment of N-NH3-containing wastewater with Na-base bentonite

The test of treating N-NH_ 3-containing wastewater with the bentonite modified by NaCl is discussed. The effects of treating N-NH_ 3-containing wastewater with bentonite modified by different density of NaCl solution are compared in various conditions. The results show that using 5 g bentonite modified by 1% NaCl solution, under the conditions of pH value 8 to 9 and room temperature, the best efficiency is obtained for treating 100 mL 160 mg/L N-NH_ 3-containing wastewater, and the removal rate reaches 93.78%. The treated wastewater reaches the national first class discharge standard (15 mg/L). Under the same conditions, the adsorption effect of modified bentonite is better than that of fly ash.