盐酸活化凹凸棒石吸附Cr^(3+)工艺条件的优化研究

Optimum technological conditions of adsorption of Cr^(3+) on palygorskite treated with hydrochloric acid in the solution

酸活化是凹凸棒石最常用的一种活化方法。文章采用L16(43)正交实验法对盐酸活化凹凸棒石吸附水中Cr3+的优化工艺条件进行了研究。结果表明,当矿物粒径小于74μm、振荡速度为150r/min、吸附液用量为50mL,并且以此三者为固定因素时,其优化工艺条件为吸附温度90℃,吸附时间4h,凹凸棒石量为1.5g。

The optimum technological conditions of adsorption of Cr3+ on palygorskite treated with hydrochloric acid in the solution were investigated with orthogonal L16(43) experiments. The results indicate that when the clay partical size is less than 74 μm, the stirring rate is 150 r/min,the volume of solution for adsorption is 50 mL and the above three factors act as invariable ones, the optimum technological conditions are as follows: the adsorption temperature is 90 ℃, the adsorption time 4 h, and the dosage of palygorskite 1.5 g.