State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, China; College of Science, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, China.
State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, China; College of Science, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, China.
J Environ Manage. 2021 Jul 1;289:112506. doi: 10.1016/j.jenvman.2021.112506. Epub 2021 Apr 5.
Polyelectrolyte composite nanospheres are relatively new adsorbents which have attracted much attention for their efficient pollutant removal and reuse performance. A novel polyelectrolyte nanosphere with magnetic function (SA@AM) was synthesized via the electrostatic reaction between the polyanionic sodium alginate (SA) and the surface of a prepared terminal amino-based magnetic nanoparticles (AMs). SA@AM showed a size of 15-22 nm with 6.85 emu·g of magnetization value, exhibiting a high adsorption capacity on Pb(II) ions representing a common heavy metal pollutant, with a maximum adsorption capacity of 105.8 mg g. The Langmuir isotherm adsorption fits the adsorption curve, indicating uniform adsorption of Pb(II) on the SA@AM surfaces. Repeated adsorption desorption experiments showed that the removal ratio of Pb(II) by SA@AM was more than 76%, illustrating improved regeneration performance. These results provide useful information for the production of bio-based green magnetic nano scale adsorption materials for environmental remediation applications.
聚电解质复合纳米球是一种相对较新的吸附剂，因其高效的污染物去除和再利用性能而受到广泛关注。通过聚阴离子海藻酸钠（SA）与制备的末端氨基基磁性纳米粒子（AMs）表面之间的静电反应，合成了具有磁性功能的新型聚电解质纳米球（SA@AM）。SA@AM 的尺寸为 15-22nm，磁化值为 6.85 emu·g，对 Pb(II)离子表现出高吸附能力，代表一种常见的重金属污染物，最大吸附容量为 105.8mg·g。Langmuir 等温吸附拟合吸附曲线，表明 Pb(II)在 SA@AM 表面的均匀吸附。重复吸附解吸实验表明，SA@AM 对 Pb(II)的去除率超过 76%，表明再生性能得到了提高。这些结果为生产用于环境修复应用的基于生物的绿色磁性纳米尺度吸附材料提供了有用信息。
