Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated Soil
Agricultural monitoring reveals cadmium (Cd) as the most prevalent heavy metal pollutant in Chinese agricultural soils, with 7.0% of sampled sites exceeding the national soil environmental quality standard (GB 15618-2018), creating substantial risks for crop safety. In situ remediation is a cost-eff...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
|
| Series: | Gels |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2310-2861/11/5/375 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849326997565603840 |
|---|---|
| author | Sijia Sun Yuying Wang Yanru Zhang Lina Wu Xinyi Wang Guoyu Wang Weitao Sun Dasong Lin Yajun Wang |
| author_facet | Sijia Sun Yuying Wang Yanru Zhang Lina Wu Xinyi Wang Guoyu Wang Weitao Sun Dasong Lin Yajun Wang |
| author_sort | Sijia Sun |
| collection | DOAJ |
| description | Agricultural monitoring reveals cadmium (Cd) as the most prevalent heavy metal pollutant in Chinese agricultural soils, with 7.0% of sampled sites exceeding the national soil environmental quality standard (GB 15618-2018), creating substantial risks for crop safety. In situ remediation is a cost-effective method that can modify the speciation and migration properties of Cd in soil. The previous stage of research studies conducted basic characterization of materials and predicted their adsorption capacity in solution environments. This study focuses on the application effects in soil environment. We cross-linked modified biochar and calcium alginate hydrogels to fabricate a composite material (MB-CA) and determined its excellent adsorption performance for cadmium. This study is a continuation of our previous work, focusing on determining the thermodynamic model of adsorption materials, the applicable environment of composite materials, the influence on soil microorganisms, and its effect on the reduction in Cd content in agricultural products. The research found that the adsorption of Cd<sup>2+</sup> by MB-CA conforms to the Freundlich isotherm model. MB-CA has the ability to regulate pH, achieving outstanding adsorption capacity at pH 4–6. The effect of MB-CA on lettuce is verified through pot experiment and field experiment. The Cd<sup>2+</sup> content in plants decreased by 63.11% and 76.92%, respectively. Additionally, MB-CA did not negatively impact microbial abundance. This study further discussed the performance and application effect of MB-CA, providing new solutions for soil remediation. |
| format | Article |
| id | doaj-art-4678b8cd7d6f4a4eb02fb7038ba6faff |
| institution | Kabale University |
| issn | 2310-2861 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj-art-4678b8cd7d6f4a4eb02fb7038ba6faff2025-08-20T03:48:01ZengMDPI AGGels2310-28612025-05-0111537510.3390/gels11050375Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated SoilSijia Sun0Yuying Wang1Yanru Zhang2Lina Wu3Xinyi Wang4Guoyu Wang5Weitao Sun6Dasong Lin7Yajun Wang8College of Resources and Environment Sciences, Northeast Agricultural University, Harbin 150030, ChinaCollege of Agriculture and Forestry Technology, Weifang Vocational College, Weifang 262737, ChinaAgro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, ChinaAgro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, ChinaAgro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, ChinaResource Environment, Tianjin Agricultural University, Tianjin 300384, ChinaResource Environment, Tianjin Agricultural University, Tianjin 300384, ChinaCollege of Resources and Environment Sciences, Northeast Agricultural University, Harbin 150030, ChinaAgro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, ChinaAgricultural monitoring reveals cadmium (Cd) as the most prevalent heavy metal pollutant in Chinese agricultural soils, with 7.0% of sampled sites exceeding the national soil environmental quality standard (GB 15618-2018), creating substantial risks for crop safety. In situ remediation is a cost-effective method that can modify the speciation and migration properties of Cd in soil. The previous stage of research studies conducted basic characterization of materials and predicted their adsorption capacity in solution environments. This study focuses on the application effects in soil environment. We cross-linked modified biochar and calcium alginate hydrogels to fabricate a composite material (MB-CA) and determined its excellent adsorption performance for cadmium. This study is a continuation of our previous work, focusing on determining the thermodynamic model of adsorption materials, the applicable environment of composite materials, the influence on soil microorganisms, and its effect on the reduction in Cd content in agricultural products. The research found that the adsorption of Cd<sup>2+</sup> by MB-CA conforms to the Freundlich isotherm model. MB-CA has the ability to regulate pH, achieving outstanding adsorption capacity at pH 4–6. The effect of MB-CA on lettuce is verified through pot experiment and field experiment. The Cd<sup>2+</sup> content in plants decreased by 63.11% and 76.92%, respectively. Additionally, MB-CA did not negatively impact microbial abundance. This study further discussed the performance and application effect of MB-CA, providing new solutions for soil remediation.https://www.mdpi.com/2310-2861/11/5/375modified biocharcalcium alginateCd pollutionin situ passivation |
| spellingShingle | Sijia Sun Yuying Wang Yanru Zhang Lina Wu Xinyi Wang Guoyu Wang Weitao Sun Dasong Lin Yajun Wang Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated Soil Gels modified biochar calcium alginate Cd pollution in situ passivation |
| title | Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated Soil |
| title_full | Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated Soil |
| title_fullStr | Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated Soil |
| title_full_unstemmed | Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated Soil |
| title_short | Development and Application of a Modified Biochar-Calcium Alginate Composite (MB-CA) for In Situ Remediation of Cadmium-Contaminated Soil |
| title_sort | development and application of a modified biochar calcium alginate composite mb ca for in situ remediation of cadmium contaminated soil |
| topic | modified biochar calcium alginate Cd pollution in situ passivation |
| url | https://www.mdpi.com/2310-2861/11/5/375 |
| work_keys_str_mv | AT sijiasun developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT yuyingwang developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT yanruzhang developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT linawu developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT xinyiwang developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT guoyuwang developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT weitaosun developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT dasonglin developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil AT yajunwang developmentandapplicationofamodifiedbiocharcalciumalginatecompositembcaforinsituremediationofcadmiumcontaminatedsoil |