Abstract:

The hydroxyapatite(HAp) was modified by adding Mg²⁺. And the Mg-HAp adsorbent was prepared. the adsorption characteristics of Mg-HAp was discussed. The results showed that 75%Mg-HAp had the best adsorption effect on Mn²⁺. The adsorption reaction of 75%Mg-HAp to Mn²⁺ was more consistent with the Langmuir equation, and it was an endothermic monolayer homogeneous adsorption reaction. The adsorption reaction was more in accordance with the quasi-second-order adsorption equation, which was a chemical reaction with multiple behaviors. When the content of 75%Mg-HAp in coal gangue was more than 5% and curing for 7 days, all Mn²⁺ in coal gangue had been adsorbed.

Key words: modified hydroxyapatite, coal gangue, leachate

摘要：

通过添加Mg²⁺对羟基磷灰石(HAp)进行改性，制备出Mn²⁺吸附剂Mg-HAp，并探讨Mg-HAp对Mn²⁺的吸附特性。结果表明，75% Mg-HAp对Mn²⁺的吸附效果最好，其对Mn²⁺的吸附反应符合Langmuir方程，为吸热的单分子层均匀吸附反应；吸附动力学数据拟合结果表明吸附反应符合准二级吸附方程，为多种行为共同作用的化学反应。当75% Mg-HAp在煤矸石中的掺杂量大于5%，养护7 d后，煤矸石中的Mn²⁺已被全部固定。

关键词: 改性羟基磷灰石, 煤矸石, 淋溶液

CLC Number: 

• X703.1