以石英砂负载羟基磷灰石作为吸附剂,通过静态实验研究了其在不同的p H、投加量、反应时间和初始锰含量等条件下对水溶液中锰的去除效果。结果表明,合成的石英砂负载羟基磷灰石具有较强的吸附性能,能有效去除水溶液中锰。当溶液初始p H为5.0,石英砂负载羟基磷灰石投加量为30 g/L、反应时间240 min,初始Mn质量浓度为5 mg/L的条件下,石英砂负载羟基磷灰石对水溶液中锰的去除率能够达到90%以上;石英砂负载羟基磷灰石对Mn的吸附规律符合Langmuir吸附等温式,吸附过程可用准2级动力学方程(t/qt)/(min·g-1·mg-1)=6.125 min-1t+35.63(R2=0.999 9)描述。
Based on quartz sand coated hydroxyapatite as adsorbent, the effects ofpH, dosage of reactive material, contact time and initial content of Mn on Mn removal efficiency in aqueous solution were studied in the static experiments. The results showed that the Mn removal rate could reach more than 90%, when the pH of solution, dosage of the reactive materials, contact time and the initial mass concentration of Mn were 5.0, 30 g/L, 240 min and 5 mg/L respectively. The adsorption of Mn by composite followed the Langmuir adsorption isotherm and the process could be described by pseudo-second-order kinetic equation: (t/qt)/(min·g-1·mg-1)=6.125 min-1 t+35.63 (R2=0.999 9).