Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners
Hazardous heavy metal ions such as copper, zinc, nickel, chromium, cadmium, and lead engender a potential risk to human health. Among the processes involved in the retention of these contaminants, adsorption is advantageous for removing toxic metals because of its environmentally friendly aspect, ef...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2023-01-01
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| Series: | Adsorption Science & Technology |
| Online Access: | http://dx.doi.org/10.1155/2023/5973552 |
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| author | Daniela Lima Machado da Silva Maria Eugenia Gimenez Boscov Marcela de Almeida Costa Laércio Leal dos Santos Márcio Camargo de Melo Veruschka Escarião Dessoles Monteiro |
| author_facet | Daniela Lima Machado da Silva Maria Eugenia Gimenez Boscov Marcela de Almeida Costa Laércio Leal dos Santos Márcio Camargo de Melo Veruschka Escarião Dessoles Monteiro |
| author_sort | Daniela Lima Machado da Silva |
| collection | DOAJ |
| description | Hazardous heavy metal ions such as copper, zinc, nickel, chromium, cadmium, and lead engender a potential risk to human health. Among the processes involved in the retention of these contaminants, adsorption is advantageous for removing toxic metals because of its environmentally friendly aspect, efficiency, and low-cost operation. Information on the adsorption of heavy metals in soils from the semiarid region of northeastern Brazil is still scarce. In this study, the adsorption of heavy metals (Cd, Cu, Zn, Ni, and Pb) by a semiarid Brazilian bentonitic soil is investigated. This soil has been used as a bottom liner in an experimental municipal solid waste (MSW) cell located in Campina Grande, State of Paraíba, Brazil. The experimental cell consists of a landfill unit on an experimental scale, with the same constructive elements of a sanitary landfill. Disturbed and undisturbed samples of the investigated soil were collected at a quarry in the rural zone of Boa Vista (state of Paraiba, Northeast Brazil). Sorption attributes were determined via batch tests with a soil-solution ratio of 1 : 12.5 (4 g of dry soil to 50 mL of solution). Linear, Freundlich, and Langmuir isotherms were fitted to the experimental data, using as fitting parameters Pearson correlation coefficient (R2) and p value with a significance level α=5%. The ascending order of maximum adsorption capacity for heavy metals followed the series Ni < Cr < Zn < Cd < Cu < Pb. The maximum adsorbent capacities obtained were similar to those of other Brazilian soils and other adsorbents. Therefore, the studied soil has a high potential to be used in the retention of heavy metals. |
| format | Article |
| id | doaj-art-d84013d3ca864eceb94e4b88e4aa65d9 |
| institution | Kabale University |
| issn | 2048-4038 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-d84013d3ca864eceb94e4b88e4aa65d92025-01-03T01:19:29ZengSAGE PublishingAdsorption Science & Technology2048-40382023-01-01202310.1155/2023/5973552Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill LinersDaniela Lima Machado da Silva0Maria Eugenia Gimenez Boscov1Marcela de Almeida Costa2Laércio Leal dos Santos3Márcio Camargo de Melo4Veruschka Escarião Dessoles Monteiro5Department of Civil EngineeringDepartment of Civil EngineeringDepartment of Sanitary and Environmental EngineeringDepartment of Sanitary and Environmental EngineeringDepartment of Civil EngineeringDepartment of Civil EngineeringHazardous heavy metal ions such as copper, zinc, nickel, chromium, cadmium, and lead engender a potential risk to human health. Among the processes involved in the retention of these contaminants, adsorption is advantageous for removing toxic metals because of its environmentally friendly aspect, efficiency, and low-cost operation. Information on the adsorption of heavy metals in soils from the semiarid region of northeastern Brazil is still scarce. In this study, the adsorption of heavy metals (Cd, Cu, Zn, Ni, and Pb) by a semiarid Brazilian bentonitic soil is investigated. This soil has been used as a bottom liner in an experimental municipal solid waste (MSW) cell located in Campina Grande, State of Paraíba, Brazil. The experimental cell consists of a landfill unit on an experimental scale, with the same constructive elements of a sanitary landfill. Disturbed and undisturbed samples of the investigated soil were collected at a quarry in the rural zone of Boa Vista (state of Paraiba, Northeast Brazil). Sorption attributes were determined via batch tests with a soil-solution ratio of 1 : 12.5 (4 g of dry soil to 50 mL of solution). Linear, Freundlich, and Langmuir isotherms were fitted to the experimental data, using as fitting parameters Pearson correlation coefficient (R2) and p value with a significance level α=5%. The ascending order of maximum adsorption capacity for heavy metals followed the series Ni < Cr < Zn < Cd < Cu < Pb. The maximum adsorbent capacities obtained were similar to those of other Brazilian soils and other adsorbents. Therefore, the studied soil has a high potential to be used in the retention of heavy metals.http://dx.doi.org/10.1155/2023/5973552 |
| spellingShingle | Daniela Lima Machado da Silva Maria Eugenia Gimenez Boscov Marcela de Almeida Costa Laércio Leal dos Santos Márcio Camargo de Melo Veruschka Escarião Dessoles Monteiro Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners Adsorption Science & Technology |
| title | Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners |
| title_full | Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners |
| title_fullStr | Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners |
| title_full_unstemmed | Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners |
| title_short | Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners |
| title_sort | adsorption of heavy metals on bentonitic soil for use in landfill liners |
| url | http://dx.doi.org/10.1155/2023/5973552 |
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