The mining activities destroy the natural vegetation and the land, pollute the environment in many aspects, and more and more attention has been paid to the ecological restoration in the mining area. Phytoremediation ...The mining activities destroy the natural vegetation and the land, pollute the environment in many aspects, and more and more attention has been paid to the ecological restoration in the mining area. Phytoremediation is the greenest tech- nical means of ecological restoration and reconstruction in the mining area. The root system is a direct organ that absorbs nutrients and water dudng phytoremediation, which is of great significance to ecological restoration. In order to explore the hot issues of plant root system in phytoremediation, the current situation of root system under the stress of heavy metal pollution and drought stress and geotechnical stress was reviewed, and the improvement effect of root exudates on rhizosphere environment was briefly introduced. The future direction of root system in ecological restoration and environmental protection was proposed on the basis of the existing research and existing problems.展开更多
Geotechnical engineering is characterized by many uncertainties,including soil material properties,environmental effects,and engineering design and construction,which bring a significant challenge to geotechnical moni...Geotechnical engineering is characterized by many uncertainties,including soil material properties,environmental effects,and engineering design and construction,which bring a significant challenge to geotechnical monitoring.However,conventional sensors with several inherent limitations,such as electromagnetic interference,signal loss in long-distance transmission,and low durability in harsh environments cannot fully meet current monitoring needs.Recently,fiber optic sensing technologies have been successfully applied in geotechnical monitoring due to the significant advantages of anti-electromagnetic interference,stable signal long-distance transmission,high durability,high sensitivity,and lightweight,which can be considered an ideal replacement for conventional sensors.In this paper,the working principle of different fiber optic sensing technologies,the development of fiber optic-based sensors,and the recent application status of these sensing technologies for geotechnical monitoring were comprehensively reviewed and discussed in detail.Finally,the challenges and countermeasures of the sensing technologies in geotechnical monitoring were also presented and discussed.展开更多
文摘The mining activities destroy the natural vegetation and the land, pollute the environment in many aspects, and more and more attention has been paid to the ecological restoration in the mining area. Phytoremediation is the greenest tech- nical means of ecological restoration and reconstruction in the mining area. The root system is a direct organ that absorbs nutrients and water dudng phytoremediation, which is of great significance to ecological restoration. In order to explore the hot issues of plant root system in phytoremediation, the current situation of root system under the stress of heavy metal pollution and drought stress and geotechnical stress was reviewed, and the improvement effect of root exudates on rhizosphere environment was briefly introduced. The future direction of root system in ecological restoration and environmental protection was proposed on the basis of the existing research and existing problems.
基金funded by the National Natural Science Foundation of China(grant no.52122805,52078103,42225702).
文摘Geotechnical engineering is characterized by many uncertainties,including soil material properties,environmental effects,and engineering design and construction,which bring a significant challenge to geotechnical monitoring.However,conventional sensors with several inherent limitations,such as electromagnetic interference,signal loss in long-distance transmission,and low durability in harsh environments cannot fully meet current monitoring needs.Recently,fiber optic sensing technologies have been successfully applied in geotechnical monitoring due to the significant advantages of anti-electromagnetic interference,stable signal long-distance transmission,high durability,high sensitivity,and lightweight,which can be considered an ideal replacement for conventional sensors.In this paper,the working principle of different fiber optic sensing technologies,the development of fiber optic-based sensors,and the recent application status of these sensing technologies for geotechnical monitoring were comprehensively reviewed and discussed in detail.Finally,the challenges and countermeasures of the sensing technologies in geotechnical monitoring were also presented and discussed.
