Method for remediating heavy metal polluted saline-alkali soil by marine bacteria combined with plants

Abstract

The invention provides a method for remediating heavy metal polluted saline-alkali soil by marine bacteria combined with plants. The method comprises the following steps that (1) the marine bacteria are ocean acinetobacter, and an ocean acinetobacter strain is obtained firstly; (2) the ocean acinetobacter strain is fermented to obtain biological surfactant fermentation liquid; and (3) sessile ficus microcarpa is planted in the polluted soil, and the biological surfactant fermentation liquid is added to the polluted soil and combined with the sessile ficus microcarpa to remediate the polluted soil. Both plant remediation and enhanced remediation by the biological surfactant produced by marine microorganisms are green and environmentally friendly and cause no secondary pollution; through effective combination of the plants and the marine microorganisms, the disadvantages that a chemical enhancer is prone to residues and difficult to degrade and has biological toxicity and the like are overcome; by employing the solubilizing and flow increasing effects of the biological surfactant, the content of available heavy metal in the soil is increased, absorption by the plants is facilitated,and a strengthening effect is played on the plants to carry out remediation on a heavy metal polluted site; ocean resource development is facilitated; and the application prospects are wide.

Description

technical field [0001] The invention relates to the technical field of remediation of heavily polluted soil, in particular to a method for remediating saline-alkali soil polluted by heavy metals with marine bacteria and plants. Background technique [0002] Under the influence of man-made and natural effects, the phenomenon of heavy metals in the soil being higher than the original content and causing the deterioration of the quality of the ecological environment is becoming more and more common. Because heavy metals can only change and migrate in soil in general, they are difficult to degrade, and at the same time, they cause different toxicity in different forms, so they are easy to stay latent for a long time, produce biomagnification, and cause non-negligible harm to plants and humans. Therefore, using the anionic (negatively charged) nature of the biosurfactant to repair heavy metals in the soil, it can be adsorbed on the soil and combined with heavy metal ions, so that...

AI Technical Summary

Problems solved by technology

However, the existing biosurfactants have just started, there are few varieties, the repair effect is not good, and the use method is relatively single

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