Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> Atmosphere
This paper reports on a novel method to remove Hg<sup>0</sup> in the wet scrubbing process using defect-rich colloidal copper sulfides for reducing mercury emissions from non-ferrous smelting flue gas. Unexpectedly, it migrated the negative effect of SO<sub>2</sub> on mercury...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-04-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/8/3157 |
| _version_ | 1797604566838018048 |
|---|---|
| author | Xiaofeng Xie Hao Chen Xudong Liu Kaisong Xiang Hui Liu |
| author_facet | Xiaofeng Xie Hao Chen Xudong Liu Kaisong Xiang Hui Liu |
| author_sort | Xiaofeng Xie |
| collection | DOAJ |
| description | This paper reports on a novel method to remove Hg<sup>0</sup> in the wet scrubbing process using defect-rich colloidal copper sulfides for reducing mercury emissions from non-ferrous smelting flue gas. Unexpectedly, it migrated the negative effect of SO<sub>2</sub> on mercury removal performance, while also enhancing Hg<sup>0</sup> adsorption. Colloidal copper sulfides demonstrated the superior Hg<sup>0</sup> adsorption rate of 306.9 μg·g<sup>−1</sup>·min<sup>−1</sup> under 6% SO<sub>2</sub> + 6% O<sub>2</sub> atmosphere with a removal efficiency of 99.1%, and the highest-ever Hg<sup>0</sup> adsorption capacity of 736.5 mg·g<sup>−1</sup>, which was 277% higher than all other reported metal sulfides. The Cu and S sites transformation results reveal that SO<sub>2</sub> could transform the tri-coordinate S sites into S<sub>2</sub><sup>2−</sup> on copper sulfides surfaces, while O<sub>2</sub> regenerated Cu<sup>2+</sup> via the oxidation of Cu<sup>+</sup>. The S<sub>2</sub><sup>2−</sup> and Cu<sup>2+</sup> sites enhanced Hg<sup>0</sup> oxidation, and the Hg<sup>2+</sup> could strongly bind with tri-coordinate S sites. This study provides an effective strategy to achieve large-capability adsorption of Hg<sup>0</sup> from non-ferrous smelting flue gas. |
| first_indexed | 2024-03-11T04:48:07Z |
| format | Article |
| id | doaj.art-efb3fab534ff4555b97106375a82c516 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T04:48:07Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-efb3fab534ff4555b97106375a82c5162023-11-17T20:13:57ZengMDPI AGMaterials1996-19442023-04-01168315710.3390/ma16083157Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> AtmosphereXiaofeng Xie0Hao Chen1Xudong Liu2Kaisong Xiang3Hui Liu4School of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaThis paper reports on a novel method to remove Hg<sup>0</sup> in the wet scrubbing process using defect-rich colloidal copper sulfides for reducing mercury emissions from non-ferrous smelting flue gas. Unexpectedly, it migrated the negative effect of SO<sub>2</sub> on mercury removal performance, while also enhancing Hg<sup>0</sup> adsorption. Colloidal copper sulfides demonstrated the superior Hg<sup>0</sup> adsorption rate of 306.9 μg·g<sup>−1</sup>·min<sup>−1</sup> under 6% SO<sub>2</sub> + 6% O<sub>2</sub> atmosphere with a removal efficiency of 99.1%, and the highest-ever Hg<sup>0</sup> adsorption capacity of 736.5 mg·g<sup>−1</sup>, which was 277% higher than all other reported metal sulfides. The Cu and S sites transformation results reveal that SO<sub>2</sub> could transform the tri-coordinate S sites into S<sub>2</sub><sup>2−</sup> on copper sulfides surfaces, while O<sub>2</sub> regenerated Cu<sup>2+</sup> via the oxidation of Cu<sup>+</sup>. The S<sub>2</sub><sup>2−</sup> and Cu<sup>2+</sup> sites enhanced Hg<sup>0</sup> oxidation, and the Hg<sup>2+</sup> could strongly bind with tri-coordinate S sites. This study provides an effective strategy to achieve large-capability adsorption of Hg<sup>0</sup> from non-ferrous smelting flue gas.https://www.mdpi.com/1996-1944/16/8/3157mercurycopper sulfidesadsorptionwet scrubbinghigh-SO<sub>2</sub> flue gas |
| spellingShingle | Xiaofeng Xie Hao Chen Xudong Liu Kaisong Xiang Hui Liu Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> Atmosphere Materials mercury copper sulfides adsorption wet scrubbing high-SO<sub>2</sub> flue gas |
| title | Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> Atmosphere |
| title_full | Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> Atmosphere |
| title_fullStr | Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> Atmosphere |
| title_full_unstemmed | Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> Atmosphere |
| title_short | Achieving Large-Capability Adsorption of Hg<sup>0</sup> in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO<sub>2</sub> Atmosphere |
| title_sort | achieving large capability adsorption of hg sup 0 sup in wet scrubbing by defect rich colloidal copper sulfides under high so sub 2 sub atmosphere |
| topic | mercury copper sulfides adsorption wet scrubbing high-SO<sub>2</sub> flue gas |
| url | https://www.mdpi.com/1996-1944/16/8/3157 |
| work_keys_str_mv | AT xiaofengxie achievinglargecapabilityadsorptionofhgsup0supinwetscrubbingbydefectrichcolloidalcoppersulfidesunderhighsosub2subatmosphere AT haochen achievinglargecapabilityadsorptionofhgsup0supinwetscrubbingbydefectrichcolloidalcoppersulfidesunderhighsosub2subatmosphere AT xudongliu achievinglargecapabilityadsorptionofhgsup0supinwetscrubbingbydefectrichcolloidalcoppersulfidesunderhighsosub2subatmosphere AT kaisongxiang achievinglargecapabilityadsorptionofhgsup0supinwetscrubbingbydefectrichcolloidalcoppersulfidesunderhighsosub2subatmosphere AT huiliu achievinglargecapabilityadsorptionofhgsup0supinwetscrubbingbydefectrichcolloidalcoppersulfidesunderhighsosub2subatmosphere |