凹凸棒粘土主要由坡缕石组成，后者为发育有一系列孔道的层链状硅酸盐矿物，具有很强的吸附能力。凹凸棒粘土的吸氟作用实验表明．其吸氟量随着溶液中氟离子浓度的提高而增加。在酸性含氟溶液中，凹凸棒粘土对溶液中氟的吸附量及溶液的降氟率都明显增加；而在碱性含氟溶液中，凹凸棒粘土对溶液中氟的吸附能力则大大降低，甚至不吸附。 Attapulgite clay is mainly composed of palygorskite, the latter for the development of a series of pore chain layer silicate minerals, has a strong adsorption capacity. Fluoride absorption experiment of attapulgite clay shows. The fluorine uptake increases with increasing fluoride concentration in the solution. In acid solution containing fluorine, the adsorption amount of attapulgite clay on the solution and the rate of decrease of the solution in the solution all increased obviously. However, the adsorption capacity of attapulgite clay on the solution of fluorine in the solution of alkaline solution was greatly reduced, Not even adsorbed.