Bacillus licheniformis, microbial inoculum, application thereof and method for passivating heavy metals

Abstract

The invention relates to the field of microbial environment repair, and specifically discloses bacillus licheniformis and an application thereof. The collection number of the bacillus licheniformis is CGMCCNo.10852. The invention further discloses a microbial inoculum containing the bacillus licheniformis and a method for passivating heavy metals. The bacillus licheniformis disclosed by the invention is capable of playing a passivating role on many heavy metals (cadmium, arsenic, lead, mercury and chromium) in a water body and soil simultaneously. The removal rates of the bacillus licheniformis provided by the invention for cadmium, arsenic, lead, mercury and chromium are up to 73.49%, 68.26%, 81.07%, 58.44% and 70.21% respectively in a water phase. The bacillus licheniformis is also capable of effectively passivating the abovementioned five heavy metals in soil with heavy metal pollution. Moreover, five heavy metals can be passivated simultaneously through adopting the bacillus licheniformis provided by the invention, the operation is simple and convenient, the energy consumption is low, secondary pollution is avoided, the period is short, and high economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the field of microbial environment restoration, in particular to a strain of Bacillus licheniformis with the function of passivating heavy metals, a bacterial agent containing the Bacillus licheniformis, their application and a method for passivating heavy metals. Background technique [0002] With the intensification of industrial and urban pollution and the increase in the types and quantities of agricultural chemicals, soil heavy metal pollution is becoming more and more serious, and the polluted area is also expanding year by year. Heavy metal pollutants stay in the soil for a long time, cannot be degraded by microorganisms, and can eventually affect human health through media such as water and plants. my country's soil is seriously polluted by heavy metals such as cadmium, arsenic, lead, mercury, and chromium. According to the national survey of sewage irrigation areas conducted by the Ministry of Agriculture of my country...

AI Technical Summary

Problems solved by technology

Among them, the physical method often requires a large amount of engineering and consumes a lot of energy; most of the chemical methods are expensive and easy to cause secondary pollution; phytoremediation in the biological method is favored by many researchers, but the plants grow slowly and the repair period is long, and microorganisms It is an environmentally friendly and economically feasible restoration technology with low repair costs, low impact on the environment, and high efficiency.

[0004] However, the current microbial strains either have poor repair effects on heavy metals, or can only repair a specific heavy metal

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