Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> Capture
With the continuous research on lignin-based sorbents, there are still limitations in the research of spherical sorbents with a high adsorption capacity for Pb<sup>2+</sup>. In order to solve the problem of low adsorption effect, alkali lignin (AL) was modified and assembled to increase...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/14/14/2824 |
| _version_ | 1797433175692017664 |
|---|---|
| author | Zhaohui Zhang Yehong Chen Chaojun Wu |
| author_facet | Zhaohui Zhang Yehong Chen Chaojun Wu |
| author_sort | Zhaohui Zhang |
| collection | DOAJ |
| description | With the continuous research on lignin-based sorbents, there are still limitations in the research of spherical sorbents with a high adsorption capacity for Pb<sup>2+</sup>. In order to solve the problem of low adsorption effect, alkali lignin (AL) was modified and assembled to increase the adsorption active sites. In this work, we used dual-modified lignin (DML) as a raw material to assemble a singular lignin-based multilayer microsphere (LMM) with sodium alginate (SA) and dopamine. The prepared adsorbent had various active functional groups and spherical structures; the specific surface area was 2.14 m<sup>2</sup>/g and the average pore size was 8.32 nm. The adsorption process followed the Freundlich isotherm and the second-order kinetic model. Therefore, the LMM adsorbed Pb<sup>2+</sup> ascribed by the electrostatic attraction and surface complexation; the adsorption capacity was 250 mg/g. The LMM showed a selective adsorption performance for Pb<sup>2+</sup> and the adsorption capacity followed the order Pb<sup>2+</sup> (187.4 mg/g) > Cu<sup>2+</sup>(168.0 mg/g) > Mn<sup>2+</sup>(166.5 mg/g). After three cycles, the removal efficiency of Pb<sup>2+</sup> by the LMM was 69.34%, indicating the reproducibility of LMM. |
| first_indexed | 2024-03-09T10:12:24Z |
| format | Article |
| id | doaj.art-504f2ffa604f4a70a34db71421bf3da1 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T10:12:24Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-504f2ffa604f4a70a34db71421bf3da12023-12-01T22:36:30ZengMDPI AGPolymers2073-43602022-07-011414282410.3390/polym14142824Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> CaptureZhaohui Zhang0Yehong Chen1Chaojun Wu2Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaKey Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaKey Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaWith the continuous research on lignin-based sorbents, there are still limitations in the research of spherical sorbents with a high adsorption capacity for Pb<sup>2+</sup>. In order to solve the problem of low adsorption effect, alkali lignin (AL) was modified and assembled to increase the adsorption active sites. In this work, we used dual-modified lignin (DML) as a raw material to assemble a singular lignin-based multilayer microsphere (LMM) with sodium alginate (SA) and dopamine. The prepared adsorbent had various active functional groups and spherical structures; the specific surface area was 2.14 m<sup>2</sup>/g and the average pore size was 8.32 nm. The adsorption process followed the Freundlich isotherm and the second-order kinetic model. Therefore, the LMM adsorbed Pb<sup>2+</sup> ascribed by the electrostatic attraction and surface complexation; the adsorption capacity was 250 mg/g. The LMM showed a selective adsorption performance for Pb<sup>2+</sup> and the adsorption capacity followed the order Pb<sup>2+</sup> (187.4 mg/g) > Cu<sup>2+</sup>(168.0 mg/g) > Mn<sup>2+</sup>(166.5 mg/g). After three cycles, the removal efficiency of Pb<sup>2+</sup> by the LMM was 69.34%, indicating the reproducibility of LMM.https://www.mdpi.com/2073-4360/14/14/2824ligninadsorptionwaste water treatmentheavy metal |
| spellingShingle | Zhaohui Zhang Yehong Chen Chaojun Wu Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> Capture Polymers lignin adsorption waste water treatment heavy metal |
| title | Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> Capture |
| title_full | Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> Capture |
| title_fullStr | Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> Capture |
| title_full_unstemmed | Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> Capture |
| title_short | Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb<sup>2+</sup> Capture |
| title_sort | dual modified lignin assembled multilayer microsphere with excellent pb sup 2 sup capture |
| topic | lignin adsorption waste water treatment heavy metal |
| url | https://www.mdpi.com/2073-4360/14/14/2824 |
| work_keys_str_mv | AT zhaohuizhang dualmodifiedligninassembledmultilayermicrospherewithexcellentpbsup2supcapture AT yehongchen dualmodifiedligninassembledmultilayermicrospherewithexcellentpbsup2supcapture AT chaojunwu dualmodifiedligninassembledmultilayermicrospherewithexcellentpbsup2supcapture |