Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions
Exploiting an adsorbent with superb selectivity is of utmost importance for the remediation of Cr (VI)-laden wastewater. In this work, a novel nitrogen and sulfur functionalized 3D macroporous cellulose material (MPS) was prepared by homogeneous cross-link cellulose and polyvinylimidazole, followed...
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MDPI AG
2022-12-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/184 |
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| author | Xiong Peng Shujun Liu Zhijia Luo Xiwen Yu Wanwen Liang |
| author_facet | Xiong Peng Shujun Liu Zhijia Luo Xiwen Yu Wanwen Liang |
| author_sort | Xiong Peng |
| collection | DOAJ |
| description | Exploiting an adsorbent with superb selectivity is of utmost importance for the remediation of Cr (VI)-laden wastewater. In this work, a novel nitrogen and sulfur functionalized 3D macroporous cellulose material (MPS) was prepared by homogeneous cross-link cellulose and polyvinylimidazole, followed by ion exchange with MoS<sub>4</sub><sup>2−</sup>. MPS exhibited high removal efficiency at a broad pH range (1.0–8.0) and large adsorption capacity (379.78 mg/g) toward Cr (VI). Particularly, outstanding selectivity with an enormous partition coefficient (1.01 × 10<sup>7</sup> mL/g) was achieved on MPS. Replacing MoS<sub>4</sub><sup>2−</sup> with Cl<sup>−</sup> and MoO<sub>4</sub><sup>2−</sup> led to a sharp decline in adsorption selectivity, demonstrating that MoS<sub>4</sub><sup>2−</sup> contributed substantially to the selectivity. Results of FTIR, XPS, and apparent kinetic analysis revealed that Cr (VI) was first pre-enriched on the MPS surface via electrostatic and dispersion forces, and then reacted with MoS<sub>4</sub><sup>2−</sup> to generate Cr (III), which deposited on MPS by forming Cr(OH)<sub>3</sub> and chromium(III) sulfide. This study provides a new idea for designing adsorbents with a superior selectivity for removing Cr (VI) from sewage. |
| first_indexed | 2024-03-11T09:56:09Z |
| format | Article |
| id | doaj.art-986bbea9c40e42d4ac0191f2c337c7f5 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:56:09Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-986bbea9c40e42d4ac0191f2c337c7f52023-11-16T15:48:10ZengMDPI AGMaterials1996-19442022-12-0116118410.3390/ma16010184Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter AnionsXiong Peng0Shujun Liu1Zhijia Luo2Xiwen Yu3Wanwen Liang4School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, ChinaSchool of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, ChinaInstitute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, ChinaSchool of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, ChinaExploiting an adsorbent with superb selectivity is of utmost importance for the remediation of Cr (VI)-laden wastewater. In this work, a novel nitrogen and sulfur functionalized 3D macroporous cellulose material (MPS) was prepared by homogeneous cross-link cellulose and polyvinylimidazole, followed by ion exchange with MoS<sub>4</sub><sup>2−</sup>. MPS exhibited high removal efficiency at a broad pH range (1.0–8.0) and large adsorption capacity (379.78 mg/g) toward Cr (VI). Particularly, outstanding selectivity with an enormous partition coefficient (1.01 × 10<sup>7</sup> mL/g) was achieved on MPS. Replacing MoS<sub>4</sub><sup>2−</sup> with Cl<sup>−</sup> and MoO<sub>4</sub><sup>2−</sup> led to a sharp decline in adsorption selectivity, demonstrating that MoS<sub>4</sub><sup>2−</sup> contributed substantially to the selectivity. Results of FTIR, XPS, and apparent kinetic analysis revealed that Cr (VI) was first pre-enriched on the MPS surface via electrostatic and dispersion forces, and then reacted with MoS<sub>4</sub><sup>2−</sup> to generate Cr (III), which deposited on MPS by forming Cr(OH)<sub>3</sub> and chromium(III) sulfide. This study provides a new idea for designing adsorbents with a superior selectivity for removing Cr (VI) from sewage.https://www.mdpi.com/1996-1944/16/1/184celluloseadsorptionselectivityhexavalent chromium |
| spellingShingle | Xiong Peng Shujun Liu Zhijia Luo Xiwen Yu Wanwen Liang Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions Materials cellulose adsorption selectivity hexavalent chromium |
| title | Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions |
| title_full | Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions |
| title_fullStr | Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions |
| title_full_unstemmed | Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions |
| title_short | Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions |
| title_sort | selective removal of hexavalent chromium by novel nitrogen and sulfur containing cellulose composite role of counter anions |
| topic | cellulose adsorption selectivity hexavalent chromium |
| url | https://www.mdpi.com/1996-1944/16/1/184 |
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