Finishing agent for modified bentonite and zero-valent molten iron

Abstract

The invention discloses a modified bentonite and zero-valence iron water treatment agent which adopts an effluent treatment technology of blending the modified bentonite and the zero-valence molten iron, wherein the blending ratio of the modified bentonite to the zero-valence molten iron is the weight ratio of the modified bentonite to the zero-valence molten iron between 10:1 and 1:5. The effluent treatment technology has the characteristics of high efficiency in pollutant removal, a long zero-valence iron service life and a wide range PH value of the applicable medium and can be used to treat various effluent and sewage containing inorganic and organic pollutants.

Description

Modified bentonite and zero-valent iron water treatment agent technical field The invention relates to a water treatment agent, in particular to a water treatment agent for removing inorganic and organic pollutants by using modified bentonite and zero-valent iron, and belongs to the technical field of wastewater treatment. Background technique At present, the ubiquitous and difficult-to-degrade pollutants in soil and groundwater are mainly some inorganic and organic pollutants such as nitro compounds, chlorinated hydrocarbons, polycyclic aromatic hydrocarbons and heavy metal ions such as hexavalent chromium and pentavalent arsenic. Economical and effective removal of these pollutants has always been a hot issue in the field of environmental protection. Existing studies have shown that zero-valent iron has good reduction and degradation effects on various pollutants such as chlorinated hydrocarbons, polycyclic aromatic hydrocarbons, and nitro compounds, and has good reducti...

AI Technical Summary

Problems solved by technology

However, the treatment of zero-valent iron in the actual wastewater system still has the following major problems: 1. The removal efficiency of some pollutants by zero-valent iron is not high; The reaction of the protons in the solution will cause the pH of the solution to rise, and iron oxides and hydroxides will gradually form and deposit on the surface of the metal iron, thereby reducing the adsorption performance of the iron surface to pollutants and reducing the reactivity and service life of the iron.