Method for increasing aquatic carbon sink

Abstract

The invention discloses a method for increasing the carbon sink amount of aquatic products, and relates to the technical field of carbon sink increasing and carbon cycle improving. The method comprises the following steps: step 1, absorbing atmospheric CO2 in a carbonate rock weathering process, so that CO2 is temporarily captured and stored in soil pores, and enrichment of CO2 in soil is realized; step 2, by guiding rainwater in the field area during rainfall, rainwater carrying dissolved inorganic carbon is increased to infiltrate into underground water and flows into a surface water body through surface runoff, and the amount of the dissolved inorganic carbon in the surface water body is increased; and 3, converting dissolved inorganic carbon in the water body into organic carbon through photosynthesis of the aquatic plants, and storing the organic carbon, so that the aquatic carbon sink in the water body is realized. According to the method, the content of dissolved inorganic carbon entering a surface water body can be greatly increased, so that the fertilization effect is improved, the amount of carbon sink formed by aquatic photosynthesis is increased, the method has important carbon sink significance, CO2 in the atmosphere can be efficiently removed, and the environmental negative effect cannot be generated.

Description

technical field [0001] The invention belongs to the technical field of increasing carbon sinks and improving carbon cycle, and in particular relates to a method for improving aquatic carbon sinks. Background technique [0002] A recent study found that dissolved inorganic carbon (DIC, CO 2 (aq)+HCO 3 - +CO 3 2- ) can be converted into organic carbon (OC) by the photosynthesis of aquatic plants in rivers, lakes and oceans and fixed in sediments, so that CO2 in the atmosphere is continuously reduced, namely: [CaCO 3 +CO 2 +H 2 O→Ca 2+ +2HCO 3 - + Aquatic photosynthetic organisms→CaCO 3 +x(CO 2 +H 2 O)+(1-x)(CH 2 O+O 2 )]. The carbonate weathering carbon sink accounts for 94% of the entire rock weathering carbon sink, while the silicate weathering only accounts for about 6%. Therefore, carbonate weathering can increase carbon sink by providing DIC required for aquatic photosynthesis, and because of its wide distribution, it has a broad carbon sink prospect. [...

AI Technical Summary

Problems solved by technology

The key step is the atmospheric CO 2 In the process of entering the water body, under purely natural conditions, the content of inorganic carbon directly entering the water body in the atmosphere is low, and the amount that is finally transformed into a stable organic carbon sink is very small, and it is difficult to achieve a large area, a large number of carbon sinks, and the formation of industrial promotion. the goal of

In addition, due to the existence of a large amount of carbonate rocks in karst areas, the amount of DIC produced by weathering is higher than that in non-karst areas. In non-karst areas, the content of carbonate rocks is less, and less inorganic carbon enters the water body. However, the area of ​​the non-karst area is 1.79 times that of the karst area, and there are still a large amount of carbonate rocks in the underground environment, and there is a huge carbon sink potential, which needs to be developed urgently