Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soil
To investigate the remediation effects of various modified biochar materials derived from different impregnation agents on Cd- and Pb-contaminated calcareous soil, nitrogen (N-), phosphorus (P-), sulfur (S-), and iron (Fe-) modified biochar materials (NBC, PBC, SBC, FBC) were fabricated through the...
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Elsevier
2025-01-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651324017378 |
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| author | Amir Bostani Xingying Meng Le Jiao Srđan D. Rončević Peng Zhang Hongwen Sun |
| author_facet | Amir Bostani Xingying Meng Le Jiao Srđan D. Rončević Peng Zhang Hongwen Sun |
| author_sort | Amir Bostani |
| collection | DOAJ |
| description | To investigate the remediation effects of various modified biochar materials derived from different impregnation agents on Cd- and Pb-contaminated calcareous soil, nitrogen (N-), phosphorus (P-), sulfur (S-), and iron (Fe-) modified biochar materials (NBC, PBC, SBC, FBC) were fabricated through the impregnation-pyrolysis method and employed to immobilize Pb and Cd in the calcareous soil. The characterization results showed that NBC exhibited an uneven pore size distribution and increased aromaticity, while PBC and SBC had increased pH and ash content. Pot experiments demonstrated significantly different effects of various modified biochar materials on soil immobilization and plant uptake of Cd and Pb. With regard to soil pH, FBC caused a notable decrease in both rhizosphere and non-rhizosphere areas, while the other materials showed an increase. NBC, PBC, and SBC effectively immobilized Cd and Pb in the soil and significantly reduced their accumulation in Chinese cabbage by 34.4 %-58.9 % for Cd and 9.2 %-53.1 % for Pb, with PBC having the best effect, attributed to complexation, precipitation, and adsorption. However, FBC had strong acidity and poor immobilization ability, which increased the available concentrations of Cd and Pb in the soil. Additionally, PBC promoted the growth, enzyme activity, and tolerance to Cd- and Pb-contaminated soil of Chinese cabbage. Overall, NBC and PBC were identified as the most effective modified biochar materials for stabilizing Cd and Pb in the soil, reducing heavy metal uptake by Chinese cabbage, and boosting enzyme activity. |
| format | Article |
| id | doaj-art-6a54edd87354474a92c7c04a8c30ea8a |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-6a54edd87354474a92c7c04a8c30ea8a2025-01-23T05:26:00ZengElsevierEcotoxicology and Environmental Safety0147-65132025-01-01289117661Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soilAmir Bostani0Xingying Meng1Le Jiao2Srđan D. Rončević3Peng Zhang4Hongwen Sun5MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China; Soil Science Department, Faculty of Agriculture, Shahed University, Tehran 15614, IranMOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, ChinaAgro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; Correspondence to: Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, #31 Fukang Road, Nankai District, Tianjin 300191, China.Univ Novi Sad, Fac Sci, Trg Dositeja Obradovica 3, Novi Sad 21000, SerbiaMOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China; Correspondence to: Nankai University, #38 Tongyan Road, Haihe Education Park, Jinnan District, Tianjin 300350, China.MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, ChinaTo investigate the remediation effects of various modified biochar materials derived from different impregnation agents on Cd- and Pb-contaminated calcareous soil, nitrogen (N-), phosphorus (P-), sulfur (S-), and iron (Fe-) modified biochar materials (NBC, PBC, SBC, FBC) were fabricated through the impregnation-pyrolysis method and employed to immobilize Pb and Cd in the calcareous soil. The characterization results showed that NBC exhibited an uneven pore size distribution and increased aromaticity, while PBC and SBC had increased pH and ash content. Pot experiments demonstrated significantly different effects of various modified biochar materials on soil immobilization and plant uptake of Cd and Pb. With regard to soil pH, FBC caused a notable decrease in both rhizosphere and non-rhizosphere areas, while the other materials showed an increase. NBC, PBC, and SBC effectively immobilized Cd and Pb in the soil and significantly reduced their accumulation in Chinese cabbage by 34.4 %-58.9 % for Cd and 9.2 %-53.1 % for Pb, with PBC having the best effect, attributed to complexation, precipitation, and adsorption. However, FBC had strong acidity and poor immobilization ability, which increased the available concentrations of Cd and Pb in the soil. Additionally, PBC promoted the growth, enzyme activity, and tolerance to Cd- and Pb-contaminated soil of Chinese cabbage. Overall, NBC and PBC were identified as the most effective modified biochar materials for stabilizing Cd and Pb in the soil, reducing heavy metal uptake by Chinese cabbage, and boosting enzyme activity.http://www.sciencedirect.com/science/article/pii/S0147651324017378Modified biocharHeavy metal pollutionSoil remediationImmobilization mechanismPlant uptake |
| spellingShingle | Amir Bostani Xingying Meng Le Jiao Srđan D. Rončević Peng Zhang Hongwen Sun Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soil Ecotoxicology and Environmental Safety Modified biochar Heavy metal pollution Soil remediation Immobilization mechanism Plant uptake |
| title | Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soil |
| title_full | Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soil |
| title_fullStr | Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soil |
| title_full_unstemmed | Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soil |
| title_short | Differentiated effects and mechanisms of N-, P-, S-, and Fe-modified biochar materials for remediating Cd- and Pb-contaminated calcareous soil |
| title_sort | differentiated effects and mechanisms of n p s and fe modified biochar materials for remediating cd and pb contaminated calcareous soil |
| topic | Modified biochar Heavy metal pollution Soil remediation Immobilization mechanism Plant uptake |
| url | http://www.sciencedirect.com/science/article/pii/S0147651324017378 |
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