The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon properties
The effects of PAC properties on aluminum (Al) adsorption behavior have not been well understood. In this study, nine commercial powdered active carbons (PACs) with different physical and chemical properties were applied to adsorb Al at different initial pH (5.5, 6.5, 7.5, which were selected based...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IWA Publishing
2023-06-01
|
| Series: | Aqua |
| Subjects: | |
| Online Access: | http://aqua.iwaponline.com/content/72/6/983 |
| _version_ | 1797783018091315200 |
|---|---|
| author | Kaiyun Wang Jianmian Deng Yitian He Min Wang Baoyou Shi Xin Huang |
| author_facet | Kaiyun Wang Jianmian Deng Yitian He Min Wang Baoyou Shi Xin Huang |
| author_sort | Kaiyun Wang |
| collection | DOAJ |
| description | The effects of PAC properties on aluminum (Al) adsorption behavior have not been well understood. In this study, nine commercial powdered active carbons (PACs) with different physical and chemical properties were applied to adsorb Al at different initial pH (5.5, 6.5, 7.5, which were selected based on Al species). The results demonstrated that the Al adsorption by different PACs all followed the pseudo-second-order kinetic at pH 5.5, 6.5 and 7.5. Moreover, the Al adsorption capacity and rate under acidic conditions were much greater than those under pH 6.5 and 7.5. At pH 5.5, the Al adsorption was mainly due to the complexion and thus acidic and phenolic hydroxyl groups were correlated to Al adsorption performance. When pH was 6.5, Al adsorption by PAC was mainly due to the surface deposition, consequently, mesopore and total pore volume were critical properties. For pH 7.5, Al transformed to Al(OH)3 colloids around the acidic micro-area caused by the PAC surface oxygen groups and then deposited onto the PAC surface. Therefore, surface area as well as acidic and phenolic hydroxyl groups contributed to Al adsorption. Above all, this study could provide sufficient guidance for PAC selection in residual Al removal.
HIGHLIGHTS
Acidic condition was more beneficial for Al adsorption.;
At pH 5.5, the Al adsorption is mainly due to the complexion effect.;
At pH 6.5, Al adsorption by PAC was mainly due to surface deposition.;
At pH 7.5, Al was transformed to Al(OH)3 colloids and deposited onto the PAC surface.; |
| first_indexed | 2024-03-13T00:20:09Z |
| format | Article |
| id | doaj.art-322e964a3a0b46cdbe63a321ec7ef94b |
| institution | Directory Open Access Journal |
| issn | 2709-8028 2709-8036 |
| language | English |
| last_indexed | 2024-03-13T00:20:09Z |
| publishDate | 2023-06-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Aqua |
| spelling | doaj.art-322e964a3a0b46cdbe63a321ec7ef94b2023-07-11T15:22:44ZengIWA PublishingAqua2709-80282709-80362023-06-0172698399510.2166/aqua.2023.017017The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon propertiesKaiyun Wang0Jianmian Deng1Yitian He2Min Wang3Baoyou Shi4Xin Huang5 Institute of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China Institute of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China Institute of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China The effects of PAC properties on aluminum (Al) adsorption behavior have not been well understood. In this study, nine commercial powdered active carbons (PACs) with different physical and chemical properties were applied to adsorb Al at different initial pH (5.5, 6.5, 7.5, which were selected based on Al species). The results demonstrated that the Al adsorption by different PACs all followed the pseudo-second-order kinetic at pH 5.5, 6.5 and 7.5. Moreover, the Al adsorption capacity and rate under acidic conditions were much greater than those under pH 6.5 and 7.5. At pH 5.5, the Al adsorption was mainly due to the complexion and thus acidic and phenolic hydroxyl groups were correlated to Al adsorption performance. When pH was 6.5, Al adsorption by PAC was mainly due to the surface deposition, consequently, mesopore and total pore volume were critical properties. For pH 7.5, Al transformed to Al(OH)3 colloids around the acidic micro-area caused by the PAC surface oxygen groups and then deposited onto the PAC surface. Therefore, surface area as well as acidic and phenolic hydroxyl groups contributed to Al adsorption. Above all, this study could provide sufficient guidance for PAC selection in residual Al removal. HIGHLIGHTS Acidic condition was more beneficial for Al adsorption.; At pH 5.5, the Al adsorption is mainly due to the complexion effect.; At pH 6.5, Al adsorption by PAC was mainly due to surface deposition.; At pH 7.5, Al was transformed to Al(OH)3 colloids and deposited onto the PAC surface.;http://aqua.iwaponline.com/content/72/6/983adsorptionaluminum speciespowdered activated carbon |
| spellingShingle | Kaiyun Wang Jianmian Deng Yitian He Min Wang Baoyou Shi Xin Huang The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon properties Aqua adsorption aluminum species powdered activated carbon |
| title | The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon properties |
| title_full | The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon properties |
| title_fullStr | The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon properties |
| title_full_unstemmed | The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon properties |
| title_short | The adsorption performance of aluminum onto powdered activated carbons: Effects of pH and carbon properties |
| title_sort | adsorption performance of aluminum onto powdered activated carbons effects of ph and carbon properties |
| topic | adsorption aluminum species powdered activated carbon |
| url | http://aqua.iwaponline.com/content/72/6/983 |
| work_keys_str_mv | AT kaiyunwang theadsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT jianmiandeng theadsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT yitianhe theadsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT minwang theadsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT baoyoushi theadsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT xinhuang theadsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT kaiyunwang adsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT jianmiandeng adsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT yitianhe adsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT minwang adsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT baoyoushi adsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties AT xinhuang adsorptionperformanceofaluminumontopowderedactivatedcarbonseffectsofphandcarbonproperties |