【摘要】 对羟基磷灰石 (Hap)固定水溶性Cd2 + 的影响因素进行了较为系统的实验研究。实验表明 :去除率与Cd2 + 初始浓度呈负相关 ,在Cd2 + 初始浓度 <10mg/L时 ,与作用时间、pH值、Hap用量呈正相关 ,温度对去除率的影响较小。通过正交实验确定了最佳吸附条件 :Hap用量为 5g/L ,pH值为 6 ,作用时间 5min。更多还原

【Abstract】 In this paper, the factors affecting the adsorption of aqueous cadmium on Hap are investigated. Laboratory experiments show that the cadmium removal efficiencies decrease with the decrease of initial concentration of the solution, and increase with the increasing pH, reaction time (t) and Hap concentration (ρ). Orthogonal experiments indicate that the optimum conditions for the adsorption are ρ=5 g/L, pH=6 and t=5 min, respectively. The experimental results demonstrate that synthetic hydroxyapatite could be used as an adsorbent for cadmium removal.更多还原