微波强化铝改性膨润土对水中氨氮的吸附性能

Study on Adsorption Properties of Microwave Enhanced Al-modified Bentonite on Ammonia-nitrogen in Wastewater

采用Al2(SO4)3溶液和微波炉制备了微波强化铝改性膨润土吸附剂,并研究了吸附剂对水中氨氮的吸附性能。试验验结果表明:制备微波强化铝改性膨润土吸附剂的适宜条件为Al2(SO4)3浓度4%,微波辐照功率480 W,辐照时间10 min。在此条件下,微波强化铝改性膨润土的比表面积可达到180.69 m2/g。在溶液pH值为10,吸附剂用量为0.4 g/L,吸附时间为20 min条件下,用所制备的微波强化铝改性膨润土吸附剂处理浓度为100mg/L的模拟氨氮废水,氨氮去除率可达96.8%。

The new adsorbent of microwave enhanced Al-modified bentonite was produced by means of Al2（SO4）3 and microwave radiation,and its adsorption properties on ammonia nitrogen in water was investigated.The experimental study showed that the optimum preparation conditions of adsorbent are 4% of Al2（SO4）3 solution under the radiation for 10 min by 480W microwave.In this condition,the specific surface area of the microwave enhanced Al-modified bentonite can be up to 180.69 m2/g.By adopting this microwave enhanced Al-modified bentonite can be up to 180.69 m2/g. By adopting this microwave enhanced Al-modified bentonite, the removal efficiency for 100 mg/L of ammonia-nitrogen wastewater will be up to 96.8% under conditions of the pH 10, the total adsorbent dosage of 0.4 g/L and the reaction time for about 20 min.