54results about How to "Applicable repair" patented technology

The invention discloses a lead-cadmium compound conditioner for rice field soil as well as preparation and application methods of the lead-cadmium compound conditioner. The conditioner is composed of the raw materials in mass fractions: 30-50% of calcium carbonate, 5-10% of hydroxyapatite, 20-30% of sepiolite and 20-30% of zeolite; the preparation of the conditioner comprises the following steps of: weighing various raw materials according to the mass fractions of the components of the lead-cadmium compound conditioner; continuously stirring the various raw materials in a stirring device for at least 30 min, and thoroughly stirring and evenly mixing all the materials; and the method of application of the conditioner comprises the following steps of: (1) analyzing the total quantity of lead and cadmium in the rice field and the content of lead and cadmium in exchange state; (2) determining the pollution level of the rice field soil by using an evaluation model; (3) applying the lead-cadmium compound conditioner according to the lead-cadmium pollution level in the rice field, and applying the lead-cadmium compound conditioner to the slightly polluted rice field at 100-150 kg / mu, to the mildly polluted rice field by 150-300 kg / mu and to medium-polluted rice field at 300-600 kg / mu, and balancing and stabilizing for 10-15 days; and (4) analyzing and measuring the content of lead and cadmium in exchange state in the rice field, and if the fixed rate is lower than 90%, additionally applying the conditioner at 100-150 kg / mu.

The present invention relates to emulsified asphalt modified by adopting water-base epoxy resin. It is characterized by that it utilizes water-base epoxy resin emulsion and solidifying agent to modify the emulsified asphalt, in which the general emulsified asphalt content is 100 portions, water-base epoxy resin emulsion content is 3-15 portions and the solidifying agent content is 20%-25% of water-base epoxy resin emulsion content.

The invention provides an integrated device for heavy metal contaminated soil remediation and leacheate recycling. The integrated device comprises a leaching tower, a sedimentation basin, a water suction pump, an electrochemical reactor, a circulating pump and a liquid reservoir, all of which are orderly connected into a loop through communicated pipes; the device is capable of effectively removing heavy metals in soil; the leacheate can be recycled after electrochemical treatment; the device is high in remediation efficiency, low in running cost, simple in structure, high in applicability, free of noise and small in floor area. The invention also discloses a corresponding method which comprises the steps of soil leaching, sedimentation and electrochemical treatment, all of which circularly circulate; the method is capable of effectively removing heavy metals in soil and few in leaching times; the leacheate is high in circulating leaching efficiency after electrochemical treatment; secondary pollution is avoided, and aftertreatment of the leacheate is avoided, so that the treatment cost is reduced; the method is simple and the process of the method is easy to control. The integrated device and the method are applicable to remediation of heavy metal contaminated soil and leacheate recycling.