AI Article Synopsis
- Thallium (Tl) is a dangerous toxic metal that contaminates soils, posing health risks through the food chain, particularly in rice cultivation.
- The study explored the effects of applying different types of biochar, especially Fe/Mn-modified biochar (FMBC), on reducing Tl uptake in rice plants and soils.
- Results showed that FMBC significantly reduced Tl levels in rice tissues (by over 75%) and improved soil microbial communities, indicating its potential as an effective and eco-friendly solution for remediating Tl-contaminated soils.
Article Abstract
Thallium (Tl) is a highly toxic metal, and its contamination in soils entails high risks to human health via food chain. It remains largely unknown of the effects of applying biochar on Tl uptake in paddy systems despite that few studies have shown that biochar exhibits great potential for decreasing Tl bioavailability in soils. Herein, we examined the mitigating effects of the application of biochar (5 and 20 g/kg pristine biochar; 5 and 20 g/kg Fe/Mn-modified biochar) on Tl uptake in paddy soil and rice plant after an entire rice growth period. The results suggested that the application of Fe/Mn-modified biochar (FMBC) considerably mitigated the accumulation of Tl in different tissues of rice plants. Specifically, total Tl content in rice plants treated with FMBC-20 decreased by over 75% compared with control experiment. In addition, the amendment of FMBC in Tl-rich paddy soils can enhance the communities of microorganisms (Actinobacteria and Proteobacteria). Further analysis of the soil microbial symbiosis network revealed that FMBC promotes the living microorganisms to play modular synergistic interactions, which is crucial for FMBC-induced Tl stabilization in soils. All these findings indicated that FMBC is an efficient and environmentally friendly Tl-immobilization alternative material and can be potentially used in the remediation of Tl-contaminated paddy soils and/or cropland.
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| http://dx.doi.org/10.1016/j.jenvman.2024.121861 | DOI Listing |
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