Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate
Sanitary landfill leachate (LL) composition varies according to climate variables variation, solid waste characteristics and composition, and landfill age. Leachate treatment is essentially carried out trough biological and physicochemical processes, which have showed variability in efficiency and a...
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MDPI AG
2021-05-01
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| Series: | Applied Sciences |
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| author | Mayk Teles de Oliveira Ieda Maria Sapateiro Torres Humberto Ruggeri Paulo Scalize Antonio Albuquerque Eric de Souza Gil |
| author_facet | Mayk Teles de Oliveira Ieda Maria Sapateiro Torres Humberto Ruggeri Paulo Scalize Antonio Albuquerque Eric de Souza Gil |
| author_sort | Mayk Teles de Oliveira |
| collection | DOAJ |
| description | Sanitary landfill leachate (LL) composition varies according to climate variables variation, solid waste characteristics and composition, and landfill age. Leachate treatment is essentially carried out trough biological and physicochemical processes, which have showed variability in efficiency and appear a costly solution for the management authorities. Electrocoagulation (EC) seems a suitable solution for leachate treatment taking into account the characteristics of the liquor. One of the problems of EC is the electrode passivation, which affects the longevity of the process. One solution to this problem could be the replacement of the electrode by one made of recyclable material, which would make it possible to change it frequently and at a lower cost. The objective of the present work was to evaluate the removal of heavy metals (As, Ba, Cd, Cr, Cu, Fe, Pb, Mn, Ni, Se and Zn) and coliforms from a LL by EC using electrodes made from steel swarf (SfE) up to 8 h. Removal efficiencies of detected heavy metals were 51%(Cr), 59%(As), 71%(Cd), 72%(Zn), 92%(Ba), 95%(Ni) and >99%(Pb). The microbial load of coliforms in leachate was reduced from 10.76 × 10<sup>4</sup> CFU/mL (raw leachate) to less than 1 CFU/mL (after treatment with SfE) (i.e., approximately 100% reduction). The use of SfE in EC of LL is very effective in removing heavy metals and coliforms and can be used as alternative treatment solution for such effluents. |
| first_indexed | 2024-03-10T10:55:20Z |
| format | Article |
| id | doaj.art-1ebd25b552e3474d8034ce6cc279bd09 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:55:20Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-1ebd25b552e3474d8034ce6cc279bd092023-11-21T21:54:55ZengMDPI AGApplied Sciences2076-34172021-05-011111500910.3390/app11115009Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill LeachateMayk Teles de Oliveira0Ieda Maria Sapateiro Torres1Humberto Ruggeri2Paulo Scalize3Antonio Albuquerque4Eric de Souza Gil5Faculty of Pharmacy, Federal University of Goiás, Goiânia 74605-170, BrazilFaculty of Pharmacy, Federal University of Goiás, Goiânia 74605-170, BrazilSchool of Civil and Environmental Engineering, Federal University of Goiás, Goiânia 74605-170, BrazilSchool of Civil and Environmental Engineering, Federal University of Goiás, Goiânia 74605-170, BrazilDepartment of Civil Engineering and Architecture, FibEnTech, GeoBioTec, University of Beira Interior, 6200-358 Covilhã, PortugalFaculty of Pharmacy, Federal University of Goiás, Goiânia 74605-170, BrazilSanitary landfill leachate (LL) composition varies according to climate variables variation, solid waste characteristics and composition, and landfill age. Leachate treatment is essentially carried out trough biological and physicochemical processes, which have showed variability in efficiency and appear a costly solution for the management authorities. Electrocoagulation (EC) seems a suitable solution for leachate treatment taking into account the characteristics of the liquor. One of the problems of EC is the electrode passivation, which affects the longevity of the process. One solution to this problem could be the replacement of the electrode by one made of recyclable material, which would make it possible to change it frequently and at a lower cost. The objective of the present work was to evaluate the removal of heavy metals (As, Ba, Cd, Cr, Cu, Fe, Pb, Mn, Ni, Se and Zn) and coliforms from a LL by EC using electrodes made from steel swarf (SfE) up to 8 h. Removal efficiencies of detected heavy metals were 51%(Cr), 59%(As), 71%(Cd), 72%(Zn), 92%(Ba), 95%(Ni) and >99%(Pb). The microbial load of coliforms in leachate was reduced from 10.76 × 10<sup>4</sup> CFU/mL (raw leachate) to less than 1 CFU/mL (after treatment with SfE) (i.e., approximately 100% reduction). The use of SfE in EC of LL is very effective in removing heavy metals and coliforms and can be used as alternative treatment solution for such effluents.https://www.mdpi.com/2076-3417/11/11/5009heavy metal removalcoliforms removallandfill leachateelectrochemical treatmentsteel-swarf-based electrode |
| spellingShingle | Mayk Teles de Oliveira Ieda Maria Sapateiro Torres Humberto Ruggeri Paulo Scalize Antonio Albuquerque Eric de Souza Gil Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate Applied Sciences heavy metal removal coliforms removal landfill leachate electrochemical treatment steel-swarf-based electrode |
| title | Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate |
| title_full | Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate |
| title_fullStr | Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate |
| title_full_unstemmed | Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate |
| title_short | Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate |
| title_sort | application of electrocoagulation with a new steel swarf based electrode for the removal of heavy metals and total coliforms from sanitary landfill leachate |
| topic | heavy metal removal coliforms removal landfill leachate electrochemical treatment steel-swarf-based electrode |
| url | https://www.mdpi.com/2076-3417/11/11/5009 |
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