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.