Method for renovating soil suffered from multiple pollution of cadmium, lead and arsenic with ligustrum malongense

Abstract

The invention discloses a method for renovating soil suffered from multiple pollution of cadmium, lead and arsenic with an ornamental plant of ligustrum malongense. The soil polluted by cadmium, lead and arsenic is soil suffered from composite pollution of one or more of cadmium, lead and arsenic, wherein the cadmium, lead and arsenic belong to heavy metal. The method includes the following steps that firstly, seedlings of the ligustrum malongense are selected and arranged in the soil suffered from cadmium, lead and arsenic in a cuttage mode; secondly, watering is performed every day so as to keep the moisture content of the soil; thirdly, rotten stable manure, urea and three-nutrient compound fertilizer are added and used as base fertilizer, and urea is sprayed in due time; fourthly, after the ligustrum malongense matures, the ligustrum malongense is wholly removed from the soil, the second batch of ligustrum malongense is planted, and the steps are repeated until all the heavy metal pollutants in the soil reach the environmental safety level. The method has the advantages that investment is small, the work amount is small, secondary pollution cannot be caused, the structure and the original physicochemical properties of the soil cannot be damaged in the renovating process, and biodiversity of the soil is recovered and improved. Being the ornamental plant, the ligustrum malongense can play a role in beautifying the environment and has good environmental benefits and ecological benefits.

Description

technical field [0001] The invention relates to an environmental green repair technology for heavy metal polluted soil, in particular to a method for repairing cadmium, lead and arsenic multiple polluted soil by using spring flowers in four seasons. Background technique [0002] Heavy metals are a class of important pollutants in the environment that endanger human health, see Document 1: Zhou Qixing, Kong Fanxiang, Zhu Lin. Ecotoxicology. Beijing: Science Press, 2004. In the past, we mainly paid attention to the problem of heavy metal pollution in the atmosphere and water, but did not pay enough attention to the problem of heavy metal pollution in the soil environment. See literature 2: Zhou Qixing, Luo Yi. Pollution Ecology Chemistry. Beijing: Science Press, 2011. In recent years, with the extensive control of heavy metal pollution in the atmospheric environment and water environment and effective results achieved, solving the problem of heavy metal pollution in the soil e...

AI Technical Summary

Problems solved by technology

In particular, the discovery of triple heavy metal hyperaccumulator plants is still blank.

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