Method for in situ removal of polycyclic aromatic hydrocarbons from river water system sediments

Abstract

The invention discloses a method for in-situ removal of polycyclic aromatic hydrocarbons in river water system sediments, which is to put ultrasonic adsorption combined equipment in the river water system sediments containing PAHs, and then stock benthic animals in the treated area. Activate the activity of microorganisms in the sediment, and then plant the submerged plant foxtail algae and/or plant ryegrass in shallow water in the treated area, through the combination of physical, chemical and biological methods, in situ without changing the river On the basis of the natural ecological environment of the water system, PAHs in the river sediments are removed, and at the same time, the activity of aquatic organisms and aquatic plants in the watershed is improved, and the water system is purified; it can be used without moving sediments, without additional construction of treatment sites, and basically without damaging the water body Under the natural environment of sediments, the reduction and elimination of pollutants can be realized in situ, and the operation is simple and the operation cost is low.

Description

technical field [0001] The invention belongs to the technical field of organic pollution treatment. The invention relates to a method for treating organic pollutants in river water system sediments, in particular to a method for in-situ removal of polycyclic aromatic hydrocarbons in river water system sediments. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) refer to hydrocarbons containing more than two benzene rings, which are persistent pollutants in surface water. Due to their low water solubility and high octanol-water partition coefficient, they are easily distributed from the water phase. Into sediments and organic matter, therefore, it is ubiquitous in surface water, estuaries, coastal ecological environment, soil and other environmental systems, with more than 100 types. In 1979, the U.S. Environmental Protection Agency listed 16 kinds of PAHs as organic pollution for priority control. object blacklist. Due to the rapid development of social ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems of removing PAHs pollution in river water system sediments in the prior art, the present invention discloses a method for in-situ removal of polycyclic aromatic hydrocarbons in river water system sediments, through the combination of physics, chemistry and biology , on the basis of in situ and without changing the natural ecological environment of the river system, PAHs in the sediments of the river system are

Images