【摘要】 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。更多还原

【Abstract】 Attapulgite is a fibrous clay mineral containing ribbons of a 2: 1 phyllosilicate structure, and has special adsorptive and colloidal properties which are the basis for environmental applications. Defluoridation by attapulgite in laboratory samples of aqueous fluoride solutions has been investigated which shows a greater defluoridation at acidic Fsolution than at neutral and alkaline. As the PH increases from 2 to 6,there is a decrease in the percentage of defluoridation,and further increase of PH has negligible effect on fluoride removal. The F adsorbing property described makes attapulgite highly suitable for environmental protections.更多还原