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通过固相反应合成了氧化铝负载的氧化镧吸附剂并研究了其对水中F-的吸附.结果表明,合成的材料对F-有很好的去除效果,最大吸附量达到53.4mg·g-1;适当提高吸附温度和氧化镧负载量都能在一定范围内提高吸附量;较低的固相反应焙烧温度有利于提高去除率,随着焙烧温度的升高,吸附量从170℃焙烧的42.2mg·g-1下降到了350℃焙烧的32.9mg·g-1.同时,吸附剂表现出了很好的适应性,在较宽的pH范围内都能保持较高的吸附量.
The alumina-supported lanthanum oxide adsorbent was synthesized by solid-state reaction and the adsorption of F- on water was studied.The results show that the synthesized material has a good removal effect on F-, the maximum adsorption capacity reached 53.4mg · g- 1. Appropriately increasing the adsorption temperature and loading of lanthanum oxide can increase the adsorption capacity within a certain range. The lower solid state reaction calcination temperature is beneficial to improve the removal rate. With the increase of calcination temperature, the adsorption capacity is from 170 ℃ 42.2mg · g-1 dropped to 32.9mg · g-1 calcined at 350 ℃ .At the same time, the adsorbents showed good adaptability and maintained a high adsorption capacity over a wide pH range.