Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludge
Ferric activation was novelly used to prepare sludge-based adsorbent (SBA) through pyrolysis treatment of biological sludge, and the adsorbents were applied to adsorb Pb2+ ions from aqueous solution. The ferric-activated SBA showed a favorable porous structure development and enhanced Pb2+ ions remo...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-12-01
|
| Series: | Arabian Journal of Chemistry |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535216300417 |
| _version_ | 1811336333449232384 |
|---|---|
| author | Xin Yang Guoren Xu Huarong Yu |
| author_facet | Xin Yang Guoren Xu Huarong Yu |
| author_sort | Xin Yang |
| collection | DOAJ |
| description | Ferric activation was novelly used to prepare sludge-based adsorbent (SBA) through pyrolysis treatment of biological sludge, and the adsorbents were applied to adsorb Pb2+ ions from aqueous solution. The ferric-activated SBA showed a favorable porous structure development and enhanced Pb2+ ions removal, with the maximum sorption capacity of 42.96 mg/g. The optimum adsorption was observed in a wide pH range of 4–6. The adsorption data fitted the Freundlich model well, indicating heterogeneous lead coverage on the adsorbents. Pseudo-second order model validated the kinetic data, suggesting that the rate-limiting step of the adsorption process was chemical sorption. The mechanism of Pb2+ ions removal involved ion exchange, precipitation, and surface complexation. The higher adsorption of ferric-activated SBA was due to the enhancive surface area that provided a larger number of active sites for adsorbate, the precipitation, and the formation of the surface complex FeOPb2+. The results demonstrate that ferric-activated SBA can be used as an effective adsorbent for Pb2+ ions removal from aqueous solution, which will also provide an option for sludge valorization. Keywords: Biological sludge, Ferric activation, Pyrolysis, Sludge-based adsorbent, Adsorption, Heavy metal |
| first_indexed | 2024-04-13T17:37:54Z |
| format | Article |
| id | doaj.art-7bef99efa06642fdaa2a86df5b326946 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-04-13T17:37:54Z |
| publishDate | 2019-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-7bef99efa06642fdaa2a86df5b3269462022-12-22T02:37:18ZengElsevierArabian Journal of Chemistry1878-53522019-12-0112841424149Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludgeXin Yang0Guoren Xu1Huarong Yu2State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, ChinaCorresponding author. Tel./fax: +86 0451 86282559.; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, ChinaState Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, ChinaFerric activation was novelly used to prepare sludge-based adsorbent (SBA) through pyrolysis treatment of biological sludge, and the adsorbents were applied to adsorb Pb2+ ions from aqueous solution. The ferric-activated SBA showed a favorable porous structure development and enhanced Pb2+ ions removal, with the maximum sorption capacity of 42.96 mg/g. The optimum adsorption was observed in a wide pH range of 4–6. The adsorption data fitted the Freundlich model well, indicating heterogeneous lead coverage on the adsorbents. Pseudo-second order model validated the kinetic data, suggesting that the rate-limiting step of the adsorption process was chemical sorption. The mechanism of Pb2+ ions removal involved ion exchange, precipitation, and surface complexation. The higher adsorption of ferric-activated SBA was due to the enhancive surface area that provided a larger number of active sites for adsorbate, the precipitation, and the formation of the surface complex FeOPb2+. The results demonstrate that ferric-activated SBA can be used as an effective adsorbent for Pb2+ ions removal from aqueous solution, which will also provide an option for sludge valorization. Keywords: Biological sludge, Ferric activation, Pyrolysis, Sludge-based adsorbent, Adsorption, Heavy metalhttp://www.sciencedirect.com/science/article/pii/S1878535216300417 |
| spellingShingle | Xin Yang Guoren Xu Huarong Yu Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludge Arabian Journal of Chemistry |
| title | Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludge |
| title_full | Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludge |
| title_fullStr | Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludge |
| title_full_unstemmed | Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludge |
| title_short | Removal of lead from aqueous solutions by ferric activated sludge-based adsorbent derived from biological sludge |
| title_sort | removal of lead from aqueous solutions by ferric activated sludge based adsorbent derived from biological sludge |
| url | http://www.sciencedirect.com/science/article/pii/S1878535216300417 |
| work_keys_str_mv | AT xinyang removalofleadfromaqueoussolutionsbyferricactivatedsludgebasedadsorbentderivedfrombiologicalsludge AT guorenxu removalofleadfromaqueoussolutionsbyferricactivatedsludgebasedadsorbentderivedfrombiologicalsludge AT huarongyu removalofleadfromaqueoussolutionsbyferricactivatedsludgebasedadsorbentderivedfrombiologicalsludge |