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204results about How to "Promote mineralization" patented technology

Surface-hydroxylated nano-pore carbon nitride photocatalytic material as well as preparation method and application thereof

The invention discloses a surface-hydroxylated nano-pore carbon nitride photocatalytic material as well as a preparation method and an application thereof. A nano-pore structure of the photocatalytic material mainly comprises mesopores with diameters of 5-30 nm and comprises micropores with diameters smaller than 2 nm, the specific surface area is 10-90 m<2>/g, and a hydroxyl group is grafted on the surface; during preparation, melamine, alkali chloride and alkali containing alkali metal or alkaline-earth metal elements are taken as raw materials and treated in an electric furnace at the temperature of 400 DEG C-600 DEG C for certain time, a product is subjected to washing, extraction filtration and separation, the yellow nano-pore carbon nitride photocatalytic material is obtained, and the alkali chloride in a washing solution is recovered. With adoption of the method, a little alkali is taken as a pore forming material, meanwhile, a catalyst forms a hydroxylation surface, no template agent and surfactant are required, the cost is reduced, the problems of complicated preparation process, non-environmental protection and low probability of industrialization promotion in the prior art are solved, and the product has excellent capability of photocatalytic degradation on gas-phase pollutants.
Owner:TIANJIN UNIV

Rock-desertification ecological restoration method

The invention discloses a rock-desertification ecological restoration method. The method includes the following steps of 1, rock-desertification matrix collating, 2, microalga inoculating, 3, herbaceous plant planting, 4, maintenance managing, and 5, bush and arbor planting. Rock-desertification matrix collating includes the steps of 1, collating terrain, and 2, replacing local soil with soil removed from other places. Terrain collating includes the steps of 1, removing pumice stones and dangerous rock bodies, 2, leveling slashes, and 3, protecting side slopes. Microalga inoculating includes the steps of 1, selecting algae species, 2, cultivating the algae species, 3, preparing algae powder and 4, conducting manual rock-desertification inoculation on microalgae. Herbaceous plant planting includes the steps of 1, grass seed selecting, 2, ground treating, 3, fertilizer applying, 4, seed sowing, and 5, soil covering. Bush and arbor planting includes the steps of 1, tree seed configuring, and 2, seed sowing. The rock-desertification ecological restoration method integrates a microalga biotechnology, an ecological soil restoration technology and an ecological forestry restoration technology, and a new technical method is provided for scientific and efficient rock-desertification treatment.
Owner:武汉德翊环境科技有限公司

Electrocatalytic reduction-oxidation reactor and method for pre-treating chlorobenzene waste water using same

The invention discloses an electrocatalytic reduction-oxidation reactor and a method for pre-treating chlorobenzene waste water using the same. The chlorobenzene waste water is led into a cathode chamber of the electrocatalytic reduction-oxidation reactor; the whole reactor is filled with the chlorobenzene waste water; electrocatalytic treatment is carried out; the waste water is subjected to a reduction reaction in the cathode chamber; the waste water after treatment in the cathode chamber is led into an anode chamber through a reduction water discharging collection system; and the obtained waste water is subjected to an oxidation reaction. The electric current densities of an anode plate and a cathode plate are 5-25mA/cm2; the residence time of the waste water in both the cathode chamber and the anode chamber is 2-5h, and the distance between the cathode chamber and the anode chamber is 1mm. According to the invention, metal reduction is replaced by electrocatalytic reduction, so that problems that a metal is prone to be passivated and the mass-transfer efficiency is low are overcome; other advanced oxidation technology, such as Fenton oxidation is replaced by electrocatalytic oxidation, so that problems that the treatment efficiency is low and the added amount of chemical reagents is large are avoided; and the concentration of the chlorobenzene waste water is effectively decreased, toxicity of waste water is reduced, and biodegradability of the waste water is improved.
Owner:NANJING UNIV +1

Processing apparatus and method for wastewater containing organic pollutants

The invention discloses a processing apparatus and method for wastewater containing organic pollutants. The device comprises a reservoir, a circulation flow pump, a front adsorption tank, a photoelectrochemical tank, a photocatalytic tank and a back adsorption tank. Adsorption materials are disposed in both the front adsorption tank and the back adsorption tank; a cathode and an anode are disposed in the photoelectrochemical tank; a first light source is disposed above a space between the cathode and the anode; a porous material loaded with a photocatalyst is disposed in the photocatalytic tank; a second light source is arranged above the porous material; and the reservoir, the circulation-flow pump, the front adsorption tank, the photoelectrochemical tank, the photocatalytic tank and the back adsorption tank are connected successively through pipelines. The wastewater processing device can realize harmless treatment of the wastewater containing the organic pollutants in a laboratory. By adding an electrolyte and combining coarse filtration, advanced oxidation, photocatalysis and fine filtration, purification treatment of high-concentration wastewater is realized at low energy consumption, by virtue of efficient conversion of energy.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Method for restoring mine matrix and greening by utilizing microalgae artificial biological crusts

The invention discloses a method for restoring a mine matrix and greening by utilizing microalgae artificial biological crusts, which comprises the following steps of: A, in a mine reclamation area in which plants are difficult to grow, selecting sand, transporting the sand to a region to be repaired and paving the sand; B, planting grasses to carry out greening, i.e. selecting herbaceous plants growing in a mine to plant; C, carrying out shrub greening, i.e. using salix psammophila, artemisia songarica schrenk, caragana microphylla and astragalus adsurgens which grow in drought-resistant regions, selecting poplar, oleaster, pines and cypress which belong to arbor, and planting shrub such as salix psammophila; D, carrying out artificial crust treatment; E, carrying out watering maintenance; and F, checking the microalgae biological crusts, wherein the step D of carrying out artificial crust treatment comprises a step a of selecting an algae type, a step b of preparing algae culture solution and a step c of culturing algae; and the step c of algae culture comprises the following steps of: (1) primary culture, (2) secondary culture, (3) tertiary culture, (4) culture of a runway-type impeller stirring and circulating culturing pool, (5) biomass collection of the algae and (6) inoculation of the microalgae artificial biological crusts. The method is easy to implement and is convenient to operate; and an effective method is provided for mine restoration, ecological restoration and improvement on the ecological environment.
Owner:武汉昌宝环保工程有限公司

Long bone fracture repositioning device

The invention discloses a long bone fracture repositioning device, which comprises a proximal end support frame, a distal end support frame, quick drawing extension rods, steel needle fixing clamps and steel needles, wherein the quick drawing extension rods are connected between the proximal end support frame and the distal end support frame, the steel needle fixing clamps are connected to the proximal end support frame and the distal end support frame, the steel needles are clamped by the steel needle fixing clamps, the proximal end support frame and the distal end support frame are same in structure and respectively comprise a transverse chute type repositioning slide plate and two fixed gliding hole plates which are connected to the chute type repositioning slide plate, one surface of each chute type repositioning slide plate is provided with a transverse guide sliding chute, a transverse guide long hole is formed between the bottom of the guide sliding chute and the other surface of the chute type repositioning slide plate, the fixed gliding hole plates are provided with holes for connecting the steel needle fixing clamps, the fixed gliding hole plates are further provided with positioning bulges which are matched with the guide sliding chutes and can slide along the guide sliding chutes. The long bone fracture repositioning device disclosed by the invention is simple in structure, the minimally invasive idea is enhanced, the excellent rate of repositioning is improved, and requirements of fracture repositioning and various malformation correcting can be met to the maximum extent.
Owner:JIANGSU GUANGJI MEDICAL TECH
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