The invention discloses a chemical repair agent suitable for petroleum pollution soil and a use method thereof. The chemical repair agent comprises an oxidizing agent, an iron-based compound and a citric acid surface active agent; the oxidizing agent is calcium peroxide; the use method comprises the steps that the petroleum pollution soil and water are mixed, the chemical repair agent is added into a mixture for carrying out a reaction for 4 to 24 h, and the petroleum pollution in the soil can be subjected to oxydative degradation. The operation method is simple, the reaction condition is gentle, the time is short, the application range is wide, and compared with the traditional oxidation technology, the chemical repair agent has the advantages that the oxidation effect is stable and continuous, the agent and running maintaining cost are flow, and the industrial application prospect is large.

Chemical repair agent suitable for petroleum pollution soil and use method thereof

The invention discloses a material for rapidly eliminating black and odor of a water body and a preparation method of the material. The preparation method comprises the following steps: step 1, filtering water purification sludge by using an iron screen, carrying out drying, grinding and sieving to obtain water purification sludge, and firing the water purification sludge to obtained fired water purification sludge; and step 2, mixing calcium peroxide powder, the fired water purification sludge and ferrous sulfate heptahydrate to prepare the mixed material. A dry feeding mode is adopted; whenthe concentration of suspended solids is less than or equal to 200 mg/L, the feeding amount is 10-15 g/m ; when the concentration of suspended solids is greater than 200 mg/L and less than or equalto 500 mg/L, the feeding amount is 20-25 g/m ; and when the concentration of suspended solids is larger than 500 mg/L, the feeding amount is 40-50 g/m . The material has the characteristics of relatively strong oxygen supply capacity, high sedimentation speed and high oxidation capacity, has capability of improving the microenvironment of bottom mud, and is beneficial to promoting recovery ofmicroorganisms in the bottom mud. After the material is immersed into the bottom mud, no new chemical risk is introduced.

Material for rapidly eliminating black and odor of water body and preparation method of material

The invention discloses a hollow-structure CuCeOx bimetallic oxide catalyst and a preparation method thereof. The catalyst is prepared from a cerium salt and a copper salt through one-step hydrothermal and calcinations processes. The preparation method comprises the following steps: 1, weighing the cerium salt and the copper salt in proportion, adding the cerium salt and the copper salt into a glucose solution, and performing stirring to obtain a uniformly mixed solution for later use; 2, transferring the solution obtained in step 1 into a polytetrafluoroethylene stainless steel hydrothermal kettle, heating the kettle to a preset temperature, carrying out a constant temperature reaction, and cooling, washing and drying the obtained reaction product after the reaction is completed in orderto obtain a carbon-assisted CuCeOx precursor composite material; and 3, calcining the composite material sample obtained in step 2 in a muffle furnace to obtain the hollow-structure CuCeOx bimetallicoxide catalyst. The hollow-structure CuCeOx bimetallic oxide catalyst prepared by the method has the advantages of small particle size, and easiness in regulation and control of the proportion of eachcomponent. The method has the advantages of simplicity, easiness in enforcement, low pollution, low cost and certain universality.

Hollow-structure CuCeOx bimetallic oxide catalyst and preparation method thereof

The invention discloses a repairing method of organically contaminated soil. The repairing method comprises the following steps: S1, the organically contaminated soil is broken and sieved, and then stone blocks are removed; S2, humic acid composite biochar, a microbial agent and enzyme liquid are mixed and then added into the organically contaminated soil to obtain pre-repaired soil; and S3, the pre-repaired soil is stacked and then placed in a sealed environment, and then repaired soil can be obtained. The humic acid composite biochar is prepared through the following steps: S01, humic acid is extracted from a raw material rich in the humic acid, the extracted humic acid is added into a solution containing sodium pyrophosphate, after even mixing, filtering is carried out to collect filtrate; and S02, ferrous salt is added into the filtrate, after stirring, the pH value is regulated to be 7.0-7.5, after woody traditional Chinese medicinal material residue is added to be mixed, pyrolysis, cooling, post-pyrolysis and activation are carried out, recooling is carried out, then a hydrochloric acid solution is used for washing, stirring, suction filtration and washing are carried out till the mixture is neutral, and the humic acid composite biochar is obtained after drying.

Repairing method of organically contaminated soil

The invention discloses a Fenton-like reaction method for treating organic wastewater by taking perborate as an oxidizing agent. The method comprises the following steps: sequentially adding three reagents, namely tea polyphenol, ferrite and perborate, into organic wastewater at a room temperature according to a molar ratio of 1:2:1 to 1:2:8, performing stirring and reacting, and realizing degradation of the organic wastewater after a certain time. According to the method disclosed by the invention, the perborate serves as a solid source of H2O2 and is wide in pH application range in water, sothat the utilization rate of the H2O2 can be improved. The tea polyphenol and iron form a complex, an iron precipitate is reduced, a redox potential of free iron can be reduced by formation of the iron complex, reaction time between the iron and the oxidizing agent is prolonged, and more active materials are produced. The method disclosed by the invention is applicable to the organic wastewater having the pH value of 3-11, and the application range is wide.

Fenton-like reaction method for treating organic wastewater by taking perborate as oxidizing agent

The invention relates to a method for removing semi-volatile organic pollutants in soil through a Fenton-like oxidation process. The method comprises the following steps: adding organic acid into polluted soil with a certain water content to prepare an acidic slurry with a pH value of 3-4, then adding alkaline solid peroxides and metal salts into the acidic slurry to obtain a Fenton's-like reaction system, enabling the Fenton's-like reaction system to react with the soil for a certain time under a certain temperature, and removing the organic pollutants in the polluted soil. Compared with theprior art, the method has the advantages of short remediation period of organic polluted soil, excellent pollutant removal effect, low damage to intrinsic physical and chemical properties of the soiland capability of preventing the soil from being acidized.

Method for removing semi-volatile organic pollutants in soil through Fenton-like oxidation process

The invention relates to an improved cobalt-based catalyst and a preparing method and application thereof The improved cobalt-based catalyst includes the following steps of firstly, dissolving glucose in an ethyl alcohol/water solution, conducting reaction in a reaction still after ultrasonic vibration, conducting suction filtration after the reaction ends, conducting alternate washing with waterand absolute ethyl alcohol, and conducting drying to obtain a carbon ball carrier; secondly, dissolving dissoluble Co salt and dissoluble transition metal salt in water to obtain a mixed solution; thirdly, adding the carbon ball carrier to the mixed solution, conducting ultrasonic vibration, dropwise adding ammonium hydroxide to adjust pH, and conducting ageing, filtering, washing and drying to obtain metal hydroxide loading carbon ball powder; fourthly, calcinating the metal hydroxide loading carbon ball powder to obtain the improved cobalt-based catalyst Compared with the prior art, the applied raw materials are low in price and environmentally friendly, the preparing conditions are mind, the obtained catalyst is high in catalytic activity and stability in the catalytic reaction process and can be used for various environment catalysis processes of volatile organic matter catalysis, combustion and degradation

Improved cobalt-based catalyst and preparing method and application thereof

The invention relates to a rehabilitation material and rehabilitation method for organic contaminated soil, wherein the rehabilitation material comprises raw materials, by mass, 10%-20% of foaming agent, 1%-5% of inorganic salt, 1%-5% of oxidant, 5%-15% of starch, 1%-5% of thickener, 60%-75% of deionized water. After 6 hours, the blocking rate of volatile organic compounds is more than 80%. After24 hours of reaction time, the removal rate of polycyclic aromatic hydrocarbons by foam is over 85%. Compared with the prior art, the foam coupling oxidant rehabilitation material and rehabilitationmethod can effectively block and remove the volatile organic compounds, and has the advantages of simple preparation process, green degradation, no secondary pollution, saving energy and environmentalprotection, and has potential application prospects in the fields of oxidation remediation of organic pollutants, odor blocking and emergency rescue of hazardous chemicals in contaminated sites.

Xu Mingyan

Papers

Method for removing semi-volatile organic pollutants in soil through Fenton-like oxidation process

Improved cobalt-based catalyst and preparing method and application thereof

Rehabilitation material and rehabilitation method for organic contaminated soil