Device and method used for removing lead ions in industrial wastewater via gamma-polyglutamic acid adsorption

Abstract

The invention discloses a device and a method used for removing lead ions in industrial wastewater via gamma-polyglutamic acid adsorption. The device comprises a reaction tank, a water inlet tank, and a dosing tank; the water inlet tank is connected with one side of the reaction tank via a water inlet pipe, and the opposite side is provided with a water outlet pipe; the top surface and the bottom surface of the reaction tank are provided with vertical upper baffle plates and vertical lower baffle plates alternately; the interior of the reaction tank is divided into a plurality of communicated reaction chambers by the upper baffle plates and the lower baffle plates; and each of the reaction chambers is communicated with the dosing tank via a pipeline. According to the method, in feeding of lead-containing waste liquid, a prepared gamma-polyglutamic acid (gamma-PGA) solution is delivered into a reaction system via a plurality of points, full contact of gamma-PGA with the lead-containing waste liquid is realized with continuous slow flowing of the lead-containing waste liquid in the reaction tank, lead ions are adsorbed continuously, flocculation is realized, and precipitation of lead ions to the bottom of the reaction tank under gravity action is realized; the lead-containing liquid is treated in two chambers, and then is delivered into a next reaction chamber via one lower baffle plate, so that one reaction period of the lead-containing liquid is completed; and water can be discharged after three above repeated reaction periods.

Description

technical field [0001] The invention relates to a method and a device for removing lead ions in electroplating wastewater and storage battery wastewater, which can be used for removing various industrial lead-containing wastewater. technical background [0002] With the rapid development of industrialization and urbanization in our country, environmental pollution is becoming more and more serious, and heavy metal pollution incidents occur frequently. Among them, the problem of lead pollution has become increasingly prominent and cannot be ignored. [0003] Lead is widely distributed in nature and has strong migration ability. It is one of the basic elements in industrial manufacturing. Lead and its compounds are serious hazards to human health and animal and plant growth. Lead in the air is mainly attached to steam and dust, and enters the human body through the respiratory tract, while lead in water mainly enters the human body through drinking water sources. Lead ingeste...

AI Technical Summary

Problems solved by technology

Lead ions in industrial wastewater can be mainly removed by chemical precipitation, adsorption and ion exchange, but when the lead concentration is less than 100mg / L, the treatment effect of the traditional process is not ideal

Images