摘要:
A method and an apparatus for recovery and deep treatment of a polluted acid. The method comprises the following main steps: (1) selectively adsorbing rare and noble metals, such as rhenium, selenium and the like; (2) separating copper from arsenic to recover the copper; (3) carrying out efficient vulcanization to perform deep arsenic removal; (4) carrying out electrodialysis to pre-concentrate acid; (5) evaporating and concentrating the acid; (6) carrying out an air-stripping method to remove fluorine and chlorine. The polluted acid treatment apparatus mainly comprises a precision filtering tank, a special adsorbing tank, a copper-arsenic separation device, a vulcanization device, an electrodialysis device, an evaporative concentration device, and an air-stripping device. The method and the apparatus can implement efficient recovery of valuable elements in polluted acid wastewater and separate treatment harmful elements, has obvious economical, social and environmental benefits, and has wide application prospects.
摘要:
A magnetic hydrotalcite composite which is useful in fields such as wastewater treatment, ultraviolet absorption, electromagnetic wave absorption and acid gas absorption, and a production method thereof. The magnetic hydrotalcite composite comprises an inner layer and an outer layer, in which the inner layer is made of a hydrotalcite compound and the outer layer is made of a ferrite compound.
摘要:
Provided is a filtration aid used when filtering, for example, sludge generated in a purification treatment process for water such as industrial wastewater and including a pulverized product of Corchorus olitorius, wherein a median diameter of the pulverized product is 150 micrometers or greater.
摘要:
Bi-metal nanoadsorbents and methods for their preparation and use are provided. Methods of using bi-metal nanoadsorbents to remove contaminants from samples, such as water, are also provided.
摘要:
In particular, in alternative embodiments, the invention provides for a method to recover silicofluoride and phosphate species from wastewaters, or barometric condenser waters, that are typically utilized in wet-process phosphoric acid facilities. The species are recovered via a continuous ion exchange approach that allows for economic recovery of the materials and especially with the silicofluoride component allows for the production of valuable industrial materials such as hydrofluoric acid and other fluoride salts as well as industrial-grade precipitated silica materials. Return of the treated waste water to the phos-acid plant allows for optimization of reagent usage.
摘要:
A method to prepare a coated current collector electrode of a flow through capacitor. The method includes preparing a coating paste includes: 10-50 weight % of carbon having a specific surface area of at least 500 m2/g; 0.3-5 weight % of a binder; 10-50 weight % based on the total paste of a first solvent having a first boiling point; and 10-50 weight % based on the total paste of a second solvent having a second boiling point. The method further includes applying the coating paste on a current collector; and allowing the second solvent in the coating paste applied on the current collector to evaporate at a temperature lower than the first boiling point.
摘要:
A system and method for isolating and analyzing a water sample in a water processing facility are disclosed. The system uses a chamber for receiving and isolating the water sample from the main water treatment process. An optical detector views and characterizes the particles in a region of the chamber. An analyzer coupled to the optical detector compares the characterized suspended particles at a first time and at with the characterized suspended particles at a second time to produce a report showing suspended particle size as a function of time.
摘要:
Method of forming micro channels in a polymeric nanocomposite film is provided. The method includes combining one or more monomers to form a mixture and adding a plurality of carbon fibers with metal nanoparticles dispersed therein to the mixture prior to or concurrently with formation of a polymer from the monomers. The method also includes adding at least one hydrophobic agent and at least one plasticizer to the polymer to form the polymeric nanocomposite film and forming a plurality of laser-etched micro channels in a surface of the polymeric nanocomposite film.
摘要:
A dolomite-based adsorbent for heavy metal, halogen and metalloid is half-fired dolomite, and a content of a residual CaMg(CO3)2 phase in the half-fired dolomite, which is analyzed using a Rietveld method by means of powder X-ray diffraction, is 0.4≦x≦35.4 (wt %), and preferably, the dolomite-based absorbent for heavy metal, halogen and metalloid further comprises ferrous sulfate.
摘要:
A high capacity hybrid ion exchange material with enhanced ability to selectively remove molecular (organics) and anionic (fluoride ion and oxyanions of phosphorus and arsenic) species from drinking water, industrial streams, and wastes, for applications predominantly in the medical and food industries.