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研究磷灰石及其变体交换吸附阴离子的模式,可丰富矿物的阴离子交换吸附理论。本文采用静态振荡法及动态往交换法详细研究了磷灰石及其变体与F-、CO32-、OH-的离子交换性能。研究结果表明,磷灰石及其变体与含有F-、CO32-、OH-的溶液作用时,溶液中的阴离子可与它们结构中的阴离子发生交换作用;预先用适当浓度的H2SO4溶液浸泡磷灰石及其变体,伴随着固相中少量PO43-及Ca2+的化学溶蚀作用,SO42-可进入磷灰石及其变体的结构中。磷灰石及其变体中非PO43-阴离子(例如F-、CO32-、OH-、SO42-)的存在,是它们具有阴离子交换性能的根源所在,且随着这些阴离子含量的增加,其离子交换容量也相应增加。
Studying the mode of exchange adsorption of apatite and its variants can enrich the anion exchange adsorption theory of minerals. In this paper, the ion exchange properties of apatite and its variants with F-, CO32- and OH- were studied in detail by static oscillatory method and dynamic exchange-exchange method. The results show that when the apatite and its variants react with the solution containing F-, CO32-, and OH-, the anions in solution can exchange with the anions in their structure. The apatite and its variants are pre-soaked with phosphorus in an appropriate concentration of H2SO4 Graystone and its variants, along with a small amount of chemical dissolution of PO43- and Ca2 + in the solid phase, SO42- can enter the structure of apatite and its variants. The presence of non-PO43- anions (such as F-, CO32-, OH-, SO42-) in apatite and its variants is at the root of their anion exchange properties and as their anion content increases Exchange capacity also increased accordingly.