微波强化铝改性膨润土对水中氨氮的吸附性能

采用Al₂(SO^₄)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100 mg/L的模拟氨氮废水，氨氮去除率可达96.8%。

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

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, 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.