Method for exploring mercury activation effect in rhizosphere micro-domain of hydro-fluctuation belt typical vegetation of reservoir

Abstract

The invention discloses a method for exploring a mercury activation effect in a rhizosphere micro-domain of hydro-fluctuation belt typical vegetation of a reservoir. The method comprises the followingsteps: S1, monitoring mercury distribution and changes of typical plants in a hydro-fluctuation belt of the reservoir through field experiments, and analyzing rhizosphere secretion components of theplants and determining soil indexes of rhizosphere micro-domain soil of the plants; S2, testing the mercury distribution of same plants in the step S1 through a root box and hydroponics experiments, analyzing the rhizosphere secretion components of the plants, and determining the soil indexes of the rhizosphere micro-domain soil of the plants; S3, investigating distribution characteristics of mercury in the typical plants in the hydro-fluctuation belt of the reservoir and the occurrence form of the mercury in plant rhizosphere and the effect of the plant rhizosphere micro-domain on mercury activity through experimental results of the step S1 and S2; on the one hand, by adopting the method disclosed by the invention, a mechanism and influencing factors of the rhizosphere micro-domain of theplants on the mercury activation can be established; furthermore, mercury release characteristics, release amount and environmental risks of hydro-fluctuation belt plants can be further evaluated.

Description

technical field [0001] The invention relates to the research field of mercury pollution in reservoirs, in particular to a method for exploring the mercury activation effect in rhizosphere micro-domains of typical vegetation in a water-fluctuating zone of a reservoir. Background technique [0002] Mercury and its compounds have strong biological toxicity. After entering the environment, inorganic mercury of different valences will be converted into more toxic methylmercury through microbial activities or photochemical effects under natural conditions, and enter into the environment through various channels. food chain and constitute a hazard to humans. The toxic concentration of mercury is low, and even a small amount of mercury in the environment can cause pollution. Therefore, mercury as a global pollutant and the environmental problems it causes are hot issues that humans must face at present and for a long period of time in the future. [0003] The Three Gorges Reservoi...

AI Technical Summary

Problems solved by technology

At present, there are few domestic studies on the micro-scale mercury activity of wetland plants, and the heavy metals in the soil have a tendency to migrate to the rhizosphere soil, and the effective content of heavy metals in the rhizosphere soil is higher than that in the soil body, mainly due to the root physiology. activities caused by changes in the rhizosphere micro-environment

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