Abstract: An electronic device may be provided with control circuitry, wireless transceiver circuitry, and a display. The electronic device may be used to provide information to a user in response to being pointed at a particular object. The control circuitry may determine when the electronic device is pointed at a particular object using wireless control circuitry and/or motion sensor circuitry. In response to determining that the electronic device is pointed at a particular object, the control circuitry may take suitable action. This may include, for example, displaying information about an object when the electronic device is pointed at the object, displaying control icons for electronic equipment when the electronic device is pointed at the electronic equipment, and/or displaying a virtual object when the electronic device is pointed at real world object.

Abstract: An electronic device may be provided with control circuitry, wireless transceiver circuitry, and a display. The electronic device may be used to provide information to a user in response to being pointed at a particular object. The control circuitry may determine when the electronic device is pointed at a particular object using wireless control circuitry and/or motion sensor circuitry. In response to determining that the electronic device is pointed at a particular object, the control circuitry may take suitable action. This may include, for example, displaying information about an object when the electronic device is pointed at the object, displaying control icons for electronic equipment when the electronic device is pointed at the electronic equipment, and/or displaying a virtual object when the electronic device is pointed at real world object.

Abstract: A method of removing chromium from water using a weak base anion exchange resin at a pH above about 5 includes the step of periodically reducing a flow of the water through the ion exchange resin for a rest period, such that a secondary mechanism of chromium removal predominates, wherein chromium ions are removed from the weak base anion exchange groups and precipitated inside the ion exchange resin. In an alternative embodiment, rather than resting, the ion exchange resin is periodically conditioned with an acid so as to enhance the secondary mechanism.

Abstract: A method of removing chromium from water using a weak base anion exchange resin at a pH above about 5 includes the step of periodically reducing a flow of the water through the ion exchange resin for a rest period, such that a secondary mechanism of chromium removal predominates, wherein chromium ions are removed from the weak base anion exchange groups and precipitated inside the ion exchange resin. In an alternative embodiment, rather than resting, the ion exchange resin is periodically conditioned with an acid so as to enhance the secondary mechanism.

Abstract: A method of preferentially removing or recovering silica from a source, including aqueous sources such as ground and potable water, which utilizes a modified ion exchange material that holds or captures the silica by ion exchange with a metal contained in the exchange material whereby the method includes the steps of: providing an ion exchange material; immobilizing a metal complex to form at least a portion of a metal containing substance inside the ionic exchange material; and contacting the source with at least a portion of the metal containing ionic exchange material.

Abstract: A method of preferentially removing or recovering silica from a source, including aqueous sources such as ground and potable water, which utilizes a modified ion exchange material that holds or captures the silica by ion exchange with a metal contained in the exchange material whereby the method includes the steps of: providing an ion exchange material; immobilizing a metal complex to form at least a portion of a metal containing substance inside the ionic exchange material; and contacting the source with at least a portion of the metal containing ionic exchange material.

Abstract: The present invention relates, generally, to the art of impregnating metal complexes into anion exchange materials to provide improved anion exchange materials with a metal inside the materials such that the modified materials effectively and efficiently remove or recover various metals, including metal containing complexes, compounds, and contaminants, such as arsenic, from, for example, process solutions, effluents and aqueous solutions. Uses for the improved anion exchange materials are also described as are methods of making modified anion exchange materials, and methods of removing and recovering at least one metal or contaminant from a source.

Abstract: The present invention relates, generally, to the art of impregnating metal complexes into anion exchange materials to provide improved anion exchange materials with a metal inside the materials such that the modified materials effectively and efficiently remove or recover various metals, including metal containing complexes, compounds, and contaminants, such as arsenic, from, for example, process solutions, effluents and aqueous solutions. Uses for the improved anion exchange materials are also described as are methods of making modified anion exchange materials, and methods of removing and recovering at least one metal or contaminant from a source.

Abstract: The present invention relates, generally, to the art of impregnating metal complexes into anion exchange materials to provide improved anion exchange materials with a metal inside the materials such that the modified materials effectively and efficiently remove or recover various metals, including metal containing complexes, compounds, and contaminants, such as arsenic, from, for example, process solutions, effluents and aqueous solutions. Uses for the improved anion exchange materials are also described as are methods of making modified anion exchange materials, and methods of removing and recovering at least one metal or contaminant from a source.

Abstract: The total organic carbon and oxygen in water may be reduced by adjusting the pH of the water to within the range of from about 4 to about 6.9 and then adding an excess of a reducing agent over the amount necessary to react with all of the organic carbon and oxygen present in the water. Preferably the water containing the reducing agent is passed over an adsorbent, absorbent activated carbon bed within a treatment unit the interior of which is anaerobic.

Abstract: An ion exchange apparatus having a plurality of channels or manifolds used for liquid distribution and collection purposes within an end of a container adjacent to an ion exchange resin bed can be improved by using a check valve permitting flow in one direction to all of the channels as the bed is being employed under "service" conditions to treat water and permitting flow in the opposite direction in less than all of the channels as the bed is being treated with a regenerant solution. Such use of less than all of such panels during the treatment of the bed with the regenerant solution makes it possible to achieve good distribution of a relatively small amount of the regenerant solution and to receive regeneration of the bed utilizing such a comparatively small amount of the regenerant solution.