Stabilizing agent used for synchronously and efficiently repairing lead and cadmium composite polluted red earth

Abstract

The invention discloses a stabilizing agent used for synchronously and efficiently repairing lead and cadmium composite polluted red earth and relates to the technical field of resource and environment engineering. The stabilizing agent specific to lead comprises, by soil sample weight percent, 3.3% of a first alkaline substance, 7% of a phosphorus-containing material B, 2% of a second alkaline substance, 0.04% of polysaccharide D, 10% of a sulfur-containing material E, 0.5% of an organic matter containing material F and 0.03% of organic acid G. The stabilizing agent specific to cadmium comprises, by soil sample weight percent, 3.3% of a first alkaline substance, 7% of a phosphorus-containing material B, 2.5% of a second alkaline substance C, 0.1% of polysaccharide D, 2.5% of a sulfur-containing material E, 0.1% of an organic matter containing material F and 0.02% of organic acid G. The stabilizing agent is used for the lead and cadmium composite polluted earth of the red earth quality and has efficient stability for the kind of pollution; through an orthogonal test, the optimal stabilizing time of lead is 24 d; and the synchronous stabling effect of lead and cadmium in the soil is relatively ideal, and the highest stabilizing rate of lead and cadmium are 69.51% and 76.09% correspondingly at the same time through a C-10 group during 24 d.

Description

technical field [0001] The invention relates to the technical field of resources and environment engineering, in particular to a stabilizer for synchronously and efficiently repairing lead-cadmium composite polluted red soil. Background technique [0002] Pb and Cd are not essential trace elements for the human body, and both have the characteristics of accumulation. Among them, Cd is known as the poison that is most likely to accumulate in organisms, which will cause contamination of animal food and pose a great threat to human health. [1] ; Such as the "bone pain disease" event caused by Cd that broke out in Japan in the 1950s. After Pb accumulates in the human body, it will cause great harm to the normal physiological functions and health of the human body as the accumulation in the human body increases. [2] , especially will threaten the nervous and digestive system of the human body; the specific manifestations are lead-induced anemia, indigestion, abdominal cramps, h...

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Problems solved by technology

As chelation increases the mobility of soil heavy metals, under rainfall or irrigation conditions, it is easy to cause heavy metals to infiltrate and pollute groundwater [14] ; In addition, it is also easy to cause the loss of nutrients due to the release of nutrients from the soil together [15]

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