A three-stage deep rapid purification device and purification method for heavy metals in groundwater

Abstract

The invention discloses a three-level deep rapid purification device for heavy metals in underground water. Suspended solids and colloids in underground water are removed through an advanced oxidation screening system, a three-level deep purification system is established by using a surface repair system, and a primary absorption layer is established by utilizing a large plant root system; a secondary enrichment layer is established by utilizing a red mud mesoporous molecular sieve and activated carbon; a third-level net fishing layer is established by utilizing a coal ash molecular sieve, zero-valent nano-iron and a nano aeration mechanism, heavy metals in the underground water are subjected to three-level deep purification, and the concentration content of the heavy metals is close to zero due to three-level purification. Meanwhile, according to the system, secondary pollution is avoided, fixed heavy metals in the treatment process are continuously absorbed by plants, the concentration and content of the heavy metals in the underground water can be rapidly reduced due to treatment, and the system is effective for a long time.

Description

technical field [0001] The invention relates to a combined device for removing heavy metals in groundwater, in particular to a combined device for three-stage deep and rapid purification of heavy metals in groundwater. [0002] The invention also relates to a method for treating heavy metals in groundwater by using the above-mentioned device. Background technique [0003] Nowadays, the shortage of water resources and the pollution of rivers are becoming more and more serious. The deteriorating water crisis not only exists in the pollution of rivers and lakes and other places, but also the crisis caused by groundwater pollution is becoming more and more serious. Once groundwater is polluted, it will take a lot of time and cost to purify it. Although there are laws to manage surface water, the laws and systems for managing groundwater are not perfect. As a result, fundamental solutions to pollution sources have not yet been taken. Groundwater is still being polluted. Among t...

AI Technical Summary

Problems solved by technology

[0004] The commonly used method is the physical and chemical complexation of heavy metals in organic matter. The complexed heavy metals not only occupy the space position, but also easily lead to soil blockage and compaction, which has become a fatal defect in the treatment of heavy metals in groundwater. At the same time, toxic metals and salts are easy to accumulate and gel.

Images