Lynntech, Inc.

Layne Christensen Company

The Texas A&M University System

UChicago Argonne, LLC

Energysolutions, LLC

Paul Sylvester

Alan J Cisar

Todd Adams

Lu Liu

Mark L Dietz

Abraham Clearfield

Waheguru Pal Singh

Owen E Boyd

Hariprasad Gali

Tim Milner

Teresia Moller

Methods and systems for treatment of wastewater. In some embodiments, the system may comprise one or more modules such as an electrochemical module, an electrocoagulation module, a flotation module, an evaporation module, and an ultrafiltration module. One or more detection modules may also be provided to analyze the concentration of one or more wastewater components in the wastewater. Data from such modules may be used to adjust one or more operational parameters or conditions in the treatment system. The system may also comprise one or more features designed to minimize adverse effects on the environment, such as avoiding adding chemicals to the stream, extracting salt or other chemicals for re-use, and/or use of carbon dioxide gas from on-site combustion processes.

Fluid treatment methods and systems

A method for removing and recovering phosphorus from a spent adsorbent medium to result in a regenerated medium and a phosphorus-containing solution useful as a fertilizer.

Method of recovering phosphate for reuse as a fertilizer

Sodium nonatitanate compositions, a method using the composition for recovery ofSr from irradiated targets, and a method using the composition for generatingRb. The sodium nonatitanate materials of the invention are highly selective at separating strontium from solutions derived from the dissolution of irradiated target materials, thus reducing target processing times. The compositions also have a very low affinity for rubidium, making it an ideal material for use as aRb generator. Sodium nonatitanate materials of this type both improve the recovery ofSr and provide a safer, more effectiveRb generator system.

Rubidium-82 generator based on sodium nonatitanate support, and improved separation methods for the recovery of strontium-82 from irradiated targets

Contaminated drinking water and other liquids are decontaminated by contact with sorbents to remove toxic contaminants such as arsenic, as well as non-toxic contaminants. In regenerating the spent sorbents, the waste stream contains both toxic and non-toxic contaminants but only toxic components must be treated as hazardous waste and subjected to strict regulations for disposal. The inventive method regenerates spent sorbents in a process that minimizes the amount of hazardous waste for disposal. The bulk of contaminants are non-toxic and are first selectively removed from the spent sorbent, generating a non-hazardous waste stream. Toxic contaminants are then removed from the sorbent, generating a hazardous waste stream. Because the bulk of contaminants was removed in the first waste stream, the lower concentration of toxic contaminants in the second waste stream requires less material (e.g., ion exchange resin) for hazardous waste decontamination and disposition.

Process for selective removal and immobilization of contaminants from spent sorbents

Metal oxide modified or impregnated activated carbon as a sorbent to reduce multiple contaminants, such as arsenic and pesticide residues from a fluid.

Filter and sorbent for removal of contaminants from a fluid

Radioisotope generators comprising inorganic layered hydroxide composition, such as magnesium aluminates and lithium aluminates. These inorganic layered hydroxides form anion exchange materials that exhibit surprisingly high selective affinities for certain radioisotopes. Inorganic layered hydroxides have been prepared and shown to have high affinity for tungstate anions, the anion form of tungsten-188, yet low affinity for perrhenate anions, the anion form of rhenium-188.

Generator for rhenium-188

A bismuth-213 generator comprising an insoluble composition having the general formula Zr(Phosponate)(HPO).nHO, wherein x is between 0 and 2; and n is the number of waters of hydration; and wherein cations of radioactive isotopes selected from radium, actinium and combinations thereof are immobilized on the composition. The value of x may be between about 0.2 and about 1. The phosphonate may be n-phosphonomethyl-miniodiacetic acid (PMIDA), wherein x may be between about 0.1 and about 1.9. The phosphonate may be one or more phosphonate having the formula:HOP&#x2014;(CH)&#x2014;N&#x2014;((CH)COH)&#x2014;((CH)COH),wherein a, b, and c are numbers from 1 to 3 that may or may not be equal. The value of x may also be between about 0.1 and 1.9.

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Inorganic ion exchange materials for the separation ofY fromSr include clinoptilolite, potassium titanosilicate pharmacosiderite, sodium titanosilicate and sodium nonatitanate. These materials are suitable for making aY generator that containsSr immobilized on an ion exchange column of the materials. The materials have a very high selectivity forSr, a very low selectivity forY, good radiation and thermal stability, low toxicity, fast reaction kinetics, and can be readily and reproducibly synthesized. A method is thus provided for elutingY from the ion exchange material with an aqueous solution to obtain a carrier-free solution ofY.

Ion exchange materials for the separation of 90Y from 90SR

Sodium nonatitanate compositions, a method using the composition for recovery of 82Sr from irradiated targets, and a method using the composition for generating 82Rb. The sodium nonatitanate materials of the invention are highly selective at separating strontium from solutions derived from the dissolution of irradiated target materials, thus reducing target processing times. The compositions also have a very low affinity for rubidium, making it an ideal material for use as a 82Rb generator. Sodium nonatitanate materials of this type both improve the recovery of 82Sr and provide a safer, more effective 82Rb generator system.

Rubidlum-82 generator based on sodium nonatitanate support, and improved separation methods for the recovery of strontium-82 from irradiated targets

Selective extraction of one or more metal anions from an aqueous solution, by contacting the aqueous solution with an organic solution including a diquaternary amine, wherein the diquaternary amine has two diquaternary nitrogens spaced at a distance of less than about 10 &#x212b;, selectively binding the metal anions to the diquaternary amine, and then separating the organic solution from the aqueous solution, wherein the diquaternary amines having the selectively bound metal anions are concentrated in the organic solution. Alternatively, the diquaternary amines may be adsorbed or chemically bonded to a solid, and the metal anion-containing aqueous solution passed over the solid having the diquaternary amines. Palladium may be selectively extracted by contacting the acidic solution with an iodide and an organic solvent, allowing the palladium to bind to the iodide, and then separating the organic solution from the aqueous solution, concentrating the bound palladium ions in the organic solution.

Growing community of inventors

Waltham, MA, United States of America

Paul Sylvester