Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review
Currently, the research and application of biochar in the remediation of heavy metal contaminated soil has become a hotspot, especially regarding the remediation of agricultural land. Biochar has been proved to be effective in reducing the content of available heavy metals in the soil as well as the...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | Ecotoxicology and Environmental Safety |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S014765132031099X |
| _version_ | 1818728867945250816 |
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| author | Jie Wang Liang Shi Lulu Zhai Haowen Zhang Shengxiao Wang Jianwen Zou Zhenguo Shen Chunlan Lian Yahua Chen |
| author_facet | Jie Wang Liang Shi Lulu Zhai Haowen Zhang Shengxiao Wang Jianwen Zou Zhenguo Shen Chunlan Lian Yahua Chen |
| author_sort | Jie Wang |
| collection | DOAJ |
| description | Currently, the research and application of biochar in the remediation of heavy metal contaminated soil has become a hotspot, especially regarding the remediation of agricultural land. Biochar has been proved to be effective in reducing the content of available heavy metals in the soil as well as the heavy metals in plants. However, the long-term effectiveness of biochar immobilization has not been widely studied. In this review, retrospective search was carried out on the published literature results concerning remediation effects of biochar on different areas of heavy metal contaminated soil in the recent years, its application in field remediation (several years), and some potential abiotic and biotic factors that may weaken the immobilization effects of biochar. This results indicate that: (1) biochar is widely used in the remediation of heavy metal contaminated soil in different areas and has excellent immobilization effect. (2) Most of the research demonstrate that the immobilization effect of biochar is effective for 2–3 years or according to few results even for 5 years. However, there have been various reports claiming that the immobilization effect of biochar decreases with time. (3) Abiotic factors such as acid rain, flooded environment, changes in soil condition (pH, redox and dissolved organic matter) and changes in biochar (Cl− and alkali leaching) can significantly weaken the immobilization effect of biochar. (4) Biotic factors such as plant roots, earthworms and soil microorganisms can also significantly reduce the immobilization effect of biochar. Therefore, field experiments having longer time span with biochar need to be further carried out, and the developmental research of modified biochar with a more stable immobilization effect also needs further attention. |
| first_indexed | 2024-12-17T22:36:49Z |
| format | Article |
| id | doaj.art-ccd5927e83ce4209abdfd585e27f9634 |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-12-17T22:36:49Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-ccd5927e83ce4209abdfd585e27f96342022-12-21T21:30:04ZengElsevierEcotoxicology and Environmental Safety0147-65132021-01-01207111261Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A reviewJie Wang0Liang Shi1Lulu Zhai2Haowen Zhang3Shengxiao Wang4Jianwen Zou5Zhenguo Shen6Chunlan Lian7Yahua Chen8College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, ChinaJiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing Agricultural University, Nanjing, 210095, ChinaAsian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midoricho, Nishitokyo, Tokyo, 188-0002, JapanCollege of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing Agricultural University, Nanjing, 210095, China; National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, Nanjing Agricultural University, Nanjing, 210095, China; Corresponding author. College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.Currently, the research and application of biochar in the remediation of heavy metal contaminated soil has become a hotspot, especially regarding the remediation of agricultural land. Biochar has been proved to be effective in reducing the content of available heavy metals in the soil as well as the heavy metals in plants. However, the long-term effectiveness of biochar immobilization has not been widely studied. In this review, retrospective search was carried out on the published literature results concerning remediation effects of biochar on different areas of heavy metal contaminated soil in the recent years, its application in field remediation (several years), and some potential abiotic and biotic factors that may weaken the immobilization effects of biochar. This results indicate that: (1) biochar is widely used in the remediation of heavy metal contaminated soil in different areas and has excellent immobilization effect. (2) Most of the research demonstrate that the immobilization effect of biochar is effective for 2–3 years or according to few results even for 5 years. However, there have been various reports claiming that the immobilization effect of biochar decreases with time. (3) Abiotic factors such as acid rain, flooded environment, changes in soil condition (pH, redox and dissolved organic matter) and changes in biochar (Cl− and alkali leaching) can significantly weaken the immobilization effect of biochar. (4) Biotic factors such as plant roots, earthworms and soil microorganisms can also significantly reduce the immobilization effect of biochar. Therefore, field experiments having longer time span with biochar need to be further carried out, and the developmental research of modified biochar with a more stable immobilization effect also needs further attention.http://www.sciencedirect.com/science/article/pii/S014765132031099XBiocharImmobilizationLong-term effectivenessPotential factorsWeakening |
| spellingShingle | Jie Wang Liang Shi Lulu Zhai Haowen Zhang Shengxiao Wang Jianwen Zou Zhenguo Shen Chunlan Lian Yahua Chen Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review Ecotoxicology and Environmental Safety Biochar Immobilization Long-term effectiveness Potential factors Weakening |
| title | Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review |
| title_full | Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review |
| title_fullStr | Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review |
| title_full_unstemmed | Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review |
| title_short | Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review |
| title_sort | analysis of the long term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect a review |
| topic | Biochar Immobilization Long-term effectiveness Potential factors Weakening |
| url | http://www.sciencedirect.com/science/article/pii/S014765132031099X |
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