Arsenic contaminated soil remediation agent

Abstract

The invention discloses an arsenic contaminated soil remediation agent. The remediation agent is prepared from, by mass, 12-15 parts of hornwort, 4-5 parts of gelidium amansii lamx, 4-7 parts of rhodochrosite, 20-25 parts of western red cedar; wherein the mass ratio of hornwort and gelidium amansii lamx is 3:1; firstly rhodochrosite is crushed to have the rhodochrosite powder; hornwort, gelidium amansii lamx and western red cedar are respectively dried and crushed into powder; the western red cedar powder is added with water and soaked, then processed by a microwave, and filtered to obtain the western red cedar liquid and the western red cedar dregs, the western red cedar liquid after the process of decompression and concentration is the western red cedar extraction liquid; the western red cedar dregs are calcined to obtain the calcined western red cedar; the western red cedar extraction liquid is evenly mixed with the western red cedar powder, the hornwort powder and the gelidium amansii lamx powder to obtain the mixture pulp body; the calcined western red cedar is placed in the pulp mixture and soaked, treated and prepared. The remediation agent has the advantages of being low in consumption, low in cost, effective and free of pollution.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to an arsenic-contaminated soil remediation agent. Background technique [0002] Arsenic is widely used in many industries, and a large amount of arsenic remains in the soil through mining, processing, use, and disposal. According to the National Soil Pollution Survey Bulletin, the rate of arsenic pollution points exceeding the standard reached 2.7%. With the acceleration of urbanization and industrialization, more and more land is polluted by arsenic; the strategic layout of cities has been readjusted, and a large number of arsenic-polluted sites are in urgent need of treatment. Soil arsenic pollution is concealed, hysteresis and long-term, and it is difficult to repair. When arsenic accumulates in the soil to a certain extent, arsenic and arsenic compounds can generally enter the human body through water, air and food, and directly endanger human health. The toxicity o...

AI Technical Summary

Problems solved by technology

However, the existing solidification and stabilization treatment technology for arsenic-contaminated soil is relatively backward, and the solidification and stabilization agents are expensive and pollute the environment, resulting in low efficiency and high cost of solidification and stabilization of arsenic-contaminated soil, secondary pollution and environmental risks.