40results about How to "Cost-effective removal" patented technology

A portable, lightweight digital imaging device uses a slit scanning arrangement to obtain an image of the eye, in particular the retina. In at least one embodiment, a digital retinal imaging device includes an illumination source operable to produce a source beam, wherein the source beam defines an illumination pathway, a scanning mechanism operable to cause a scanning motion of the illumination pathway in one dimension with respect to a target, an optical element situated within the illumination pathway, the optical element operable to focus the illumination pathway into an illumination slit at a plane conjugate to the target, wherein the illumination slit is slit shaped, a first two dimensional detector array operable to detect illumination returning from the target and acquire one or more data sets from the detected illumination, wherein the returning illumination defines a detection pathway, and a shaping mechanism positioned within the illumination pathway, wherein the shaping mechanism shapes the source beam into at least one arc at a plane conjugate to the pupil. In at least one exemplary embodiment, the digital retinal imaging device is operable to minimize at least one aberration from the optical element or an unwanted reflection from the target or a reflection from a device.

A method for removing arsenic species from an aqueous medium with modified zeolite minerals comprising providing an aqueous medium containing arsenic species in the form of both arsenate and arsenite, contacting the aqueous medium with an iron (II) laden zeolite mineral so that arsenic in the form of at least one of arsenate and arsenite contained in the aqueous medium can be adsorbed onto the iron (II) laden zeolite mineral forming an arsenic adsorbed iron (II) laden zeolite mineral, and separating the arsenic adsorbed iron (II) laden zeolite mineral from the aqueous medium.

The invention relates to the field of environmental protection, and aims to provide a multi-heat source and shaft intervallic heating type thermal desorption device for repairing organic pollutant contaminated soil. An intervallic heating type thermal desorption machine of the device is a jacket type heating furnace; a soil feeding port, an unearthing machine, a first multi-heat source inlet and a first multi-heat source outlet are formed in the outer cylinder; a carrier gas inlet and a carrier gas outlet are formed in the inner cylinder; and a hollow shaft type revolving shaft adopting a jacket structure is formed by an outer shaft sleeve and a hollow inner shaft sleeve; a second multi-heat source inlet and a second multi-heat source outlet respectively connected with the outer shaft sleeve or the inner shaft sleeve are formed in the hollow shaft type revolving shaft. The device can effectively treat the organic pollutant contaminated soil, is particularly suitable for repairing high-concentration and multi-component organic pollutant contaminated soil fields, has excellent adaptability to various heat sources, improves the synthetic utilization efficiency of the heat sources, has great soil processing capacity in unit time, and is particularly suitable for sandy contaminated soil. For the organic pollutant contaminated soil, the device can achieve the organic pollutant removing efficiency above 99.9%.

The invented method is distinguished by a combination of the following method steps: provision of a semiconductor planar substrate composed of a semiconductor material, reduction of the thickness of the semiconductor planar substrate inside at least one surface region of the semiconductor planar substrate in order to form a raised surface region in relation to the surface planar region of reduced thickness, structuring the raised surface region of the semiconductor planar substrate by means of local mechanical removal of material in order to place impressions inside the raised surface regions, joining the structured surface of the semiconductor planar substrate with the glasslike planar substrate in such a manner that the glasslike planar substrate at least partially covers the surface planar region of reduced thickness, tempering the joined planar substrates in such a manner that in a first tempering phase, which is conducted under vacuum conditions, the glasslike planar substrate covering the surface region of reduced thickness forms a fluid-tight bond with the surface region of reduced thickness, with the planar substrate covering the impressions in a fluid-tight manner under vacuum conditions, and that in a second tempering phase, at least partial areas of the glasslike material flow into the impressions of the structured surface of the semiconductor planar substrate.

This invention is related to a composition of matter useful for sequestering target metal-ions from an environment, said composition comprising a polymer and derivatized nanoparticles comprising inorganic nanoparticles having an attached metal-ion sequestraint, wherein said inorganic nanoparticles have an average particle size of less than 200 nm and the derivatized nanoparticles have a stability constant greater than 10¹⁰ with iron (III).

The invention relates to the field of environmental protection, and aims to provide a multi-heat source and shaftless intervallic heating type thermal desorption device for the organic pollutant contaminated soil repair. The device comprises an intervallic heating type thermal desorption machine being a jacket type heating furnace, as well as an inner cylinder and an outer cylinder arranged in the horizontal direction, wherein a soil feeding port, an unearthing machine, a multi-heat source inlet and a multi-heat source outlet are formed in the outer cylinder; a carrier gas inlet and a carrier gas outlet are formed in the inner cylinder; a shaftless rotating shaft formed by continuous spiral blades is arranged in the inner cylinder. The device is particularly suitable for repairing high-concentration and multi-component organic pollutant contaminated soil fields, has excellent adaptability to various heat sources, improves the synthetic utilization efficiency of the heat sources, reduces the amount of smoke required to be treated, facilitates the heat exchange between the various heat sources and the soil, improves the heat transfer efficiency, has great soil processing capacity in unit time, and is particularly suitable for sandy contaminated soil.

This invention relates to a composition of matter comprising derivatized nanoparticles comprising inorganic nanoparticles having an attached metal-ion sequestrant, wherein said inorganic nanoparticles have an average particle size of less than 200 nm and the derivatized nanoparticles have a stability constant greater than 10¹⁰ with iron (III). It further relates to an article comprising said derivatized nanoparticles and to a method of removing iron from a liquid medium by contacting said medium with the derivatized nanoparticles.

A composition of matter comprising intercalated composite particles comprising a layered host material intercalated with a metal ion sequestrant having a stability constant greater than 10¹⁵ with iron (III), wherein said sequestrant is not an alpha amino carboxylate. It further relates to articles comprising the composite particles.

The invention relates to a method of removing organic substances and ammonia nitrogen in aquaculture water, which solves the problem about high cost and low efficiency of aquaculture water treatment. The invention adopts ozone ultraviolet irradiation and biological regeneration filling absorption, the invention is characterized in that: an ozone/ultraviolet combined oxidization reaction tank and a biological regeneration filling reaction tank filled with biological active carbon, biological clinoptilolite, sandiness soil granules, and limestone are arranged, the aquaculture water and the ozone gas are mixed through venturi tube and enters from the lower part of the ozone/ultraviolet combined oxidization reaction tank, the water and the ozone gas flow upwardly through the reaction tank and stay for 2-10 minutes, the treated aquaculture water flows out from the water outlet of the upper part of the reaction tank, the ozone tail gas is exhausted from the gas exhaust opening of the reaction tank; the pre-treated aquaculture water flows through the biological regeneration filling layer from the water inlet of the upper part of the biological regeneration filling reaction tank, and stays for 5-50 minutes, the treated aquaculture water flows out from the lower part of the biological reaction regeneration filling reaction tank, the method is used for aquaculture water treatment.

The invention relates to a method for efficiently removing heavy metal pollutants on the basis of fluorinated zero-valent iron. The fluorinated zero-valent iron is characterized in that part of hydroxyl groups on the surface of zero-valent iron are substituted by fluorine or a fluorine-containing group and a sulfonic acid surfactant group. The usage is as follows: the fluorinated zero-valent ironis added into heavy metal pollutant water to remove heavy metals. The fluorinated zero-valent iron provided by the invention has good transfer capability, high electron selectivity and high utilization rate, and when being used for removing heavy metal pollutants, the fluorinated zero-valent iron has the advantages of high pollutant removal efficiency, easiness in operation and cost-efficiency.

In a device to clean wiper elements of an inkjet print head of an ink dispenser of a printing apparatus having a chassis, a maintenance station is mounted on the chassis to allow travel of the maintenance station in at least one direction that causes the maintenance station to move past the inkjet print head. The maintenance station carries wiper elements that wipe ink from the surface of the inkjet print head as the maintenance station moves past the inkjet print head. An ink uptake unit is mounted at the chassis at a position past which the maintenance station travels, after traveling past the inkjet print head. The ink uptake unit includes material that transfers ink from the wipers to the material.

The invention relates to a method for removing bromates from water by homogeneous photocatalysis. The method concretely comprises the following steps: adding a reducing agent to bromate-containing water to be treated, stirring the reducing agent and the water, irradiating the obtained solution with ultraviolet lights to generate reducing free radicals, and carrying out a reducing reaction to remove the bromates from the water. The reducing agent is irradiated with the ultraviolet lights to generate the reducing free radicals, a redox reaction occurs to achieve the purpose of removing bromates,the reducing agent is a conventional reducing agent having a low price, the bromate removal rate can reach 99% or more, and the final product is bromide ions. The method has the advantages of no introductio of other poisonous and harmful substances, simplicity in operation, mild and easily controlled conditions, achieving of the purpose of economical, efficient, secondary pollution-free, condition-mild and water adaptability-strong removal of the bromates from the water, great practical significance and wide prospect.

The invention relates to a method and a device for supplying underground water with municipal sewage through a biofilter and an ultrafiltration technology. The method adopts second-grade treated water as a raw material from a municipal sewage treatment plant and comprises the following processes that the second-grade treated water passes through a denitrification biofilter and an ultrafiltration device, undergoes an ozone reaction, seeps into the ground in a way of flooding on the surface of the ground, passes through a soil vadose zone and enters a phreatic aquifer. The method and device belonging a municipal sewage advanced treatment technology can remove effectively and economically multiple pollutants in municipal sewage, make product water satisfy three types of underground water quality standards and realize safe supplying of underground water.

Strong fabrics with an affinity for oil can be deployed from boats and other sea vessels to absorb oil that has been spilled into oceans, gulfs, rivers, or other bodies of water. For example, strong nylon spunbonded fabrics can be used to soak up oil from bodies of water. The fabrics can also be used in concert with other methods, such as with containment booms.

The invention belongs to the related technical field of coal-fired flue gas pollutant treatment, and discloses oxidation absorption equipment for integrated removal of multiple pollutants in coal-fired flue gas. The equipment comprises an oxidation absorption tower main body, a liquid oxidant gasification device, a desulfurizing agent conveying device, a three-stage water pool, a desulfurizing slurry spraying assembly, a chimney and an induced draft fan, wherein the top end of the oxidation absorption tower main body is connected to the chimney through the induced draft fan, the bottom end ofthe oxidation absorption tower main body is connected to the three-stage water pool, the desulfurizing slurry spraying assembly is connected to the oxidation absorption tower main body and the three-stage water pool, the desulfurizing agent conveying device is connected to the three-stage water pool, the liquid oxidant gasification device is connected to one side of the oxidation absorption towermain body, and the oxidation absorption tower main body is used for making coal-fired gas sequentially react with a gas oxidant and a desulfurizing slurry. According to the present invention, the equipment has characteristics of improved automation and integration, high efficiency and small size.

A method for reducing neutral oil losses during a neutralization step including (1) mixing an acid-treated vegetable oil with a base to neutralize (a) free fatty acid and (b) added acid in the acid-treated vegetable oil to obtain a pretreated mixture; (2) subjecting the pretreated mixture to at least two successive cycles of localized shear effects, each cycle including a step of forcing the pretreated mixture at a pressure through one or more nozzles, each cycle of localized shear effects having a shear duration time of less than 5×10⁵ seconds and a shear rate of at least about 6000 sec⁻¹.