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中文摘要：
提出了即时合成层状双氢氧化物去除F-的新方法，并初步揭示了反应的基本原理：首先由Mg^2＋、Al^3＋水解共沉淀形成LDH，然后F-嵌入LDH层间平衡结构电荷，从而使F-离子以LDH沉淀的形式被去除。研究结果表明，影响处理效果的因素包括Mg/Al比值、pH值、反应时间等。当Mg/Al为2∶1，pH值为9.5，反应时间为120 min时，F-去除率较高，Mg、Al利用比较充分，显示这种废水处理技术具有非常好的研究价值。
英文摘要：
A new method of treatment of wastewater containing fluorine by synthesizing LDH in-situ has been presented and its principle may be described as follows： first, Mg^2＋ and Al^3＋ hydrolysis to form Mg/Al-LDH by adding Mg^2＋, Al^3＋ and NaOH into wastewater containing F^-, then F^- anions are selectively intercalated into the interlayer of LDH to balance positive structural charge and the F^- in wastewater is removed in settling of LDH synthesized in-situ. The results indicated the factors affecting the efficiency of F^- removal include Mg/Al ratio, pH and oscillation time. The better removal efficiency of F^- can be reached under technological condition： Mg/Al ratio 2 ： 1, pH value 9.5 and oscillation time 120 min, under which Mg^2＋ and Al^3＋ added can be fully used. This technology has anextraordinary value of further study.
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