39results about How to "Improve decontamination effect" patented technology

The invention relates to a preparation method of a ferric salt solution, belongs to the field of water treatment, and particularly relates to a method for generating a ferric salt coagulant through reaction of bivalent ferric salt and concentrated acid. The method solves the problems that the price of the existing trivalent ferric salt coagulant is high; the pollution eliminating capability of the bivalent ferric salt coagulant is poor. The preparation method of the ferric salt solution comprises the following steps of 1, weighing bivalent ferric salt solid into a reaction container; 2, dripping concentrated acid onto the surface of the bivalent ferric salt in the reaction container to obtain acid treated bivalent ferric salt; 3, then, adding distilled water for dissolving the acid treated bivalent ferric salt to obtain the ferric salt solution. The preparation method has the advantages that concentrated acid is used for taking a reaction with the bivalent ferric salt; the prepared ferric salt solution has a good pollution eliminating effect; the removal rate of the ferric salt solution on molybdate can reach 90 percent to 98 percent; the price of the bivalent ferric salt is much lower than that of an ordinary ferric sulfate; the preparation method is simple; the implementation is easy.

The invention belongs to the technical field of water treatment, and relates to a preparation technology of a banana peel polymer coagulant for water treatment, which mainly adopts the "low temperature water extraction method" at 30°C to 50°C, including the following steps: (1) Under the condition of temperature and stirring, a certain amount of water is added to the crushed banana peel powder for leaching; (2) under the condition of certain temperature and stirring, add a small amount of sodium hydroxide solution; (3) optionally add A certain amount of sodium hypochlorite and stabilizer to obtain coagulant products with different effects and stability. The technology of the present invention can prepare a kind of banana peel utilization rate is higher, and preparation cost is lower, and effluent pH value is in neutral or slightly alkaline range, and stability is better, and water treatment effect is more excellent, especially to chromaticity, Banana peel polymer coagulant for water treatment with high heavy metal removal efficiency. The banana peel polymer coagulant for water treatment in the present invention can be widely used in the fields of drinking water, urban sewage, industrial waste water and the like.

The invention discloses a water treatment compound agent for removing organic pollutants in an oxidation mode with high-activity singlet oxygen and a water treatment method of the water treatment compound agent, and relates to water treatment agents and methods for removing pollution in oxidation modes. The problems that when the singlet oxygen is produced through a photosensitization method, a light source needs to be added, secondary pollution is generated, and the use efficiency of the singlet oxygen in a chemical method is low are solved. The water treatment compound agent is composed of bleaching powder, inorganic solid peroxide and powdered activated carbon, and the mass ratio of the bleaching powder to the inorganic solid peroxide to the powdered activated carbon is (1-10):1(1-10). According to the water treatment compound agent, hypochlorite ions provided by the bleaching powder reacts with hydrogen peroxide slowly released after the peroxide is dissolved in water to generate the high-activity singlet oxygen, and through a micro-interface provided by the powdered activated carbon, the self-decomposition of the singlet oxygen can be restrained, the survival time of the singlet oxygen can be prolonged, and the use ratio of the singlet oxygen is improved. The water treatment compound agent is high in efficiency of removing the organic pollutants in the oxidation mode, cannot generate poisonous and harmful by-products, and is convenient to transport and store and more suitable for emergency treatment.