Abstract
Accumulation of heavy metals in agricultural soils due to human production activities—mining, fossil fuel combustion, and application of chemical fertilizers/pesticides—results in severe environmental pollution. As the transmission of heavy metals through the food chain and their accumulation pose a serious risk to human health and safety, there has been increasing attention in the investigation of heavy metal pollution and search for effective soil remediation technologies. Here, we summarized and discussed the basic principles, strengths and weaknesses, and limitations of common standalone approaches such as those based on physics, chemistry, and biology, emphasizing their incompatibility with large-scale applications. Moreover, we explained the effects, advantages, and disadvantages of the combinations of common single repair approaches. We highlighted the latest research advances and prospects in phytoremediation-chemical, phytoremediation-microbe, and phytoremediation-genetic engineering combined with remediation approaches by changing metal availability, improving plant tolerance, promoting plant growth, improving phytoextraction and phytostabilization, etc. We then explained the improved safety and applicability of phytoremediation combined with other repair approaches compared to common standalone approaches. Finally, we established a prospective research direction of phytoremediation combined with multi-technology repair strategy.
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The study was supported by the National Natural Science Foundation of China (No. 41807135, No. 41877491 and No. 31800076), the Natural Science Foundation of Hunan province, China (No. 2019JJ50220), and the Scientific Research Fund of Hunan Provincial Education Department (No. 18B107).
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Liu, S., Yang, B., Liang, Y. et al. Prospect of phytoremediation combined with other approaches for remediation of heavy metal-polluted soils. Environ Sci Pollut Res 27, 16069–16085 (2020). https://doi.org/10.1007/s11356-020-08282-6
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DOI: https://doi.org/10.1007/s11356-020-08282-6