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采用静态吸附法研究了松香基羧基化聚合物微球对Pb~(2+)的吸附性能。实验结果表明,在p H=6.0,固液比分别为0.5g/L和3g/L,初始浓度为100mg/L,293K条件下,松香基羧基化聚合物微球对Pb~(2+)的最大吸附量分别为15.28mg/g和10.73mg/g。吸附动力学研究表明,该吸附过程符合伪二级吸附动力学方程。吸附热力学研究表明,该吸附过程符合Langmuir等温吸附模型,ΔG<0,ΔS<0,ΔH<0,表明该吸附过程是自发的放热过程。脱附再生实验表明,经过5次重复再生,其吸附量下降了29%,微球具有重复利用的潜质。XPS测试表明Pb~(2+)吸附在微球的表面上。
The adsorption behavior of rosin-based carboxylated polymer microspheres to Pb 2+ was studied by static adsorption method. The experimental results showed that rosin-based carboxylated polymer microspheres could effectively inhibit the growth of Pb 2+ at p H 6.0, solid / liquid ratio 0.5 g / L and 3 g / L, initial concentration 100 mg / L, The maximum adsorption capacity was 15.28 mg / g and 10.73 mg / g, respectively. Adsorption kinetics studies show that the adsorption process in line with the pseudo-second-order kinetic equation. Adsorption thermodynamics studies show that the adsorption process accords with Langmuir isothermal adsorption model, ΔG <0, ΔS <0, ΔH <0, indicating that the adsorption process is a spontaneous exothermic process. Desorption regeneration experiments showed that after 5 times of regeneration, the adsorption capacity decreased by 29%, microspheres have the potential to be reused. XPS test showed that Pb 2+ adsorbed on the surface of microspheres.