Effects of microplastics and biochar on soil cadmium availability and wheat plant performance
Abstract Biochar is a promising amendment to promote cadmium (Cd) sorption and fixation in agricultural soil, where microplastics are emerging contaminants in soil. Herein, a greenhouse pot experiment was conducted to elucidate the effects on Cd availability in a soil–plant system by biochar and fre...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-08-01
|
| Series: | GCB Bioenergy |
| Subjects: | |
| Online Access: | https://doi.org/10.1111/gcbb.13083 |
| _version_ | 1827900840703164416 |
|---|---|
| author | Jiarui Miao Yalan Chen Enyao Zhang Yan Yang Ke Sun Bo Gao |
| author_facet | Jiarui Miao Yalan Chen Enyao Zhang Yan Yang Ke Sun Bo Gao |
| author_sort | Jiarui Miao |
| collection | DOAJ |
| description | Abstract Biochar is a promising amendment to promote cadmium (Cd) sorption and fixation in agricultural soil, where microplastics are emerging contaminants in soil. Herein, a greenhouse pot experiment was conducted to elucidate the effects on Cd availability in a soil–plant system by biochar and fresh/aged microplastics application. The fresh microplastics led to an obvious increase in soil Cd availability and Cd uptake by wheat plant, while the aged microplastics increased the available Cd in soil but had no effect on Cd uptake by wheat plant, which was likely attributed to the blocking effect of the aged microplastics on Cd transportation from the soil to the wheat plant. Unexpectedly, biochar had increased Cd availability and Cd uptake. The increased soil soluble Cd was because of both decreased soil pH and elevated dissolved organic matter (DOM) content resulted by biochar addition. Also, the unchanged Cd adsorption of the soil was likely responsible for the increased tested soil Cd availability. In addition, the combined effects of a greater decrease in soil pH, an increase in soil DOM content, and a reduction in Cd adsorption after the addition of microplastics to biochar‐amended soil resulted in a significant increase (ranging from 2.63% to 47.73%) in Cd availability compared to soil treated with biochar alone. Moreover, fresh microplastics inhibited wheat growth, and greater inhibition effect was observed for their aged ones. The biochar elevated the wheat biomass; however, the coexistence of microplastics and biochar decreased the wheat plant biomass compared with biochar alone, due to the negative influence of microplastics in plant growth. |
| first_indexed | 2024-03-12T23:37:12Z |
| format | Article |
| id | doaj.art-d5a58d61b05c4832965c88262d1e544a |
| institution | Directory Open Access Journal |
| issn | 1757-1693 1757-1707 |
| language | English |
| last_indexed | 2024-03-12T23:37:12Z |
| publishDate | 2023-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | GCB Bioenergy |
| spelling | doaj.art-d5a58d61b05c4832965c88262d1e544a2023-07-15T08:15:18ZengWileyGCB Bioenergy1757-16931757-17072023-08-011581046105710.1111/gcbb.13083Effects of microplastics and biochar on soil cadmium availability and wheat plant performanceJiarui Miao0Yalan Chen1Enyao Zhang2Yan Yang3Ke Sun4Bo Gao5State Key Laboratory of Water Environment Simulation, School of Environment Beijing Normal University Beijing ChinaState Key Laboratory of Water Environment Simulation, School of Environment Beijing Normal University Beijing ChinaState Key Laboratory of Water Environment Simulation, School of Environment Beijing Normal University Beijing ChinaState Key Laboratory of Water Environment Simulation, School of Environment Beijing Normal University Beijing ChinaState Key Laboratory of Water Environment Simulation, School of Environment Beijing Normal University Beijing ChinaState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing ChinaAbstract Biochar is a promising amendment to promote cadmium (Cd) sorption and fixation in agricultural soil, where microplastics are emerging contaminants in soil. Herein, a greenhouse pot experiment was conducted to elucidate the effects on Cd availability in a soil–plant system by biochar and fresh/aged microplastics application. The fresh microplastics led to an obvious increase in soil Cd availability and Cd uptake by wheat plant, while the aged microplastics increased the available Cd in soil but had no effect on Cd uptake by wheat plant, which was likely attributed to the blocking effect of the aged microplastics on Cd transportation from the soil to the wheat plant. Unexpectedly, biochar had increased Cd availability and Cd uptake. The increased soil soluble Cd was because of both decreased soil pH and elevated dissolved organic matter (DOM) content resulted by biochar addition. Also, the unchanged Cd adsorption of the soil was likely responsible for the increased tested soil Cd availability. In addition, the combined effects of a greater decrease in soil pH, an increase in soil DOM content, and a reduction in Cd adsorption after the addition of microplastics to biochar‐amended soil resulted in a significant increase (ranging from 2.63% to 47.73%) in Cd availability compared to soil treated with biochar alone. Moreover, fresh microplastics inhibited wheat growth, and greater inhibition effect was observed for their aged ones. The biochar elevated the wheat biomass; however, the coexistence of microplastics and biochar decreased the wheat plant biomass compared with biochar alone, due to the negative influence of microplastics in plant growth.https://doi.org/10.1111/gcbb.13083availabilitybiocharcadmiummicroplastics |
| spellingShingle | Jiarui Miao Yalan Chen Enyao Zhang Yan Yang Ke Sun Bo Gao Effects of microplastics and biochar on soil cadmium availability and wheat plant performance GCB Bioenergy availability biochar cadmium microplastics |
| title | Effects of microplastics and biochar on soil cadmium availability and wheat plant performance |
| title_full | Effects of microplastics and biochar on soil cadmium availability and wheat plant performance |
| title_fullStr | Effects of microplastics and biochar on soil cadmium availability and wheat plant performance |
| title_full_unstemmed | Effects of microplastics and biochar on soil cadmium availability and wheat plant performance |
| title_short | Effects of microplastics and biochar on soil cadmium availability and wheat plant performance |
| title_sort | effects of microplastics and biochar on soil cadmium availability and wheat plant performance |
| topic | availability biochar cadmium microplastics |
| url | https://doi.org/10.1111/gcbb.13083 |
| work_keys_str_mv | AT jiaruimiao effectsofmicroplasticsandbiocharonsoilcadmiumavailabilityandwheatplantperformance AT yalanchen effectsofmicroplasticsandbiocharonsoilcadmiumavailabilityandwheatplantperformance AT enyaozhang effectsofmicroplasticsandbiocharonsoilcadmiumavailabilityandwheatplantperformance AT yanyang effectsofmicroplasticsandbiocharonsoilcadmiumavailabilityandwheatplantperformance AT kesun effectsofmicroplasticsandbiocharonsoilcadmiumavailabilityandwheatplantperformance AT bogao effectsofmicroplasticsandbiocharonsoilcadmiumavailabilityandwheatplantperformance |