The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in Rice
Cadmium (Cd) contamination in paddy soils severely threatens rice safety and human health. Currently, the high costs and technical barriers of existing Cd remediation methods limit their development, so it’s urgent to find an economical and feasible method. Herein, the synergistic effects of rhodoch...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
|
| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/15/6/1321 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849467641028149248 |
|---|---|
| author | Jing He Zhixi Ye Fugui Chen Wentao Zhou Xin Ma Zhiqiang Fu |
| author_facet | Jing He Zhixi Ye Fugui Chen Wentao Zhou Xin Ma Zhiqiang Fu |
| author_sort | Jing He |
| collection | DOAJ |
| description | Cadmium (Cd) contamination in paddy soils severely threatens rice safety and human health. Currently, the high costs and technical barriers of existing Cd remediation methods limit their development, so it’s urgent to find an economical and feasible method. Herein, the synergistic effects of rhodochrosite slag and biochar on Cd immobilization in slightly acidic Cd-contaminated paddy soils have been investigated. A field experiment with four treatments—control (CK), rhodochrosite slag (R), biochar (B), and combined rhodochrosite slag + biochar (RB)—was conducted in Hunan Province, China. Results demonstrated that RB treatment significantly increased soil pH, transferred the mobile Cd to the residual fraction, and reduced Cd availability in the soil. Cd concentrations in rice roots, stems, leaves, and brown rice decreased by 26.37%, 47.20%, 31.03%, and 51.85%, respectively, under RB treatment, achieving the lowest TF and BCF values. Furthermore, RB treatment increased rice yield by 18.73%. The synergistic interaction between biochar’s adsorption capacity and rhodochrosite slag-derived competitive ions effectively transformed Cd into stable fractions, reducing bioavailability. This study proposes a novel remediation strategy that not only enhances the Cd immobilization ability of biochar but also achieves simultaneous waste valorization and soil remediation. |
| format | Article |
| id | doaj-art-09bd2bd083404c0d86cb98f5df88b05e |
| institution | Kabale University |
| issn | 2073-4395 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj-art-09bd2bd083404c0d86cb98f5df88b05e2025-08-20T03:26:09ZengMDPI AGAgronomy2073-43952025-05-01156132110.3390/agronomy15061321The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in RiceJing He0Zhixi Ye1Fugui Chen2Wentao Zhou3Xin Ma4Zhiqiang Fu5College of Agronomy, Hunan Agricultural University, Changsha 410128, ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, ChinaHunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, ChinaCadmium (Cd) contamination in paddy soils severely threatens rice safety and human health. Currently, the high costs and technical barriers of existing Cd remediation methods limit their development, so it’s urgent to find an economical and feasible method. Herein, the synergistic effects of rhodochrosite slag and biochar on Cd immobilization in slightly acidic Cd-contaminated paddy soils have been investigated. A field experiment with four treatments—control (CK), rhodochrosite slag (R), biochar (B), and combined rhodochrosite slag + biochar (RB)—was conducted in Hunan Province, China. Results demonstrated that RB treatment significantly increased soil pH, transferred the mobile Cd to the residual fraction, and reduced Cd availability in the soil. Cd concentrations in rice roots, stems, leaves, and brown rice decreased by 26.37%, 47.20%, 31.03%, and 51.85%, respectively, under RB treatment, achieving the lowest TF and BCF values. Furthermore, RB treatment increased rice yield by 18.73%. The synergistic interaction between biochar’s adsorption capacity and rhodochrosite slag-derived competitive ions effectively transformed Cd into stable fractions, reducing bioavailability. This study proposes a novel remediation strategy that not only enhances the Cd immobilization ability of biochar but also achieves simultaneous waste valorization and soil remediation.https://www.mdpi.com/2073-4395/15/6/1321riceeconomicalrhodochrosite slagsynergistic effectbioavailabilitywaste valorization |
| spellingShingle | Jing He Zhixi Ye Fugui Chen Wentao Zhou Xin Ma Zhiqiang Fu The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in Rice Agronomy rice economical rhodochrosite slag synergistic effect bioavailability waste valorization |
| title | The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in Rice |
| title_full | The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in Rice |
| title_fullStr | The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in Rice |
| title_full_unstemmed | The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in Rice |
| title_short | The Effect of Combined Application of Rhodochrosite Slag and Biochar on Cadmium Uptake in Rice |
| title_sort | effect of combined application of rhodochrosite slag and biochar on cadmium uptake in rice |
| topic | rice economical rhodochrosite slag synergistic effect bioavailability waste valorization |
| url | https://www.mdpi.com/2073-4395/15/6/1321 |
| work_keys_str_mv | AT jinghe theeffectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT zhixiye theeffectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT fuguichen theeffectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT wentaozhou theeffectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT xinma theeffectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT zhiqiangfu theeffectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT jinghe effectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT zhixiye effectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT fuguichen effectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT wentaozhou effectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT xinma effectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice AT zhiqiangfu effectofcombinedapplicationofrhodochrositeslagandbiocharoncadmiumuptakeinrice |