Abstract:
There are disclosed processes for destructing a toxic chemical including the steps of mixing the toxic chemical with a liquid phase formed by an aqueous mixture of water and an ionic liquid or molten salt which is miscible with water, the ionic liquid or molten salt comprising a tertiary amine group or quaternary ammonium group; and contacting the toxic chemical in the liquid phase with the ionic liquid or molten salt so as to decompose the toxic chemical.
Abstract:
A closed-loop system and methods for the remediation of an aqueous solution comprising a polychlorinated biphenyl employing carbon modified titanium dioxide nanoparticles having a Ti:C atomic ratio of 3:1 to 6:1 and a bandgap energy of 1.4-2.0 eV as photocatalysts.
Abstract:
The present application relates to a novel method for reductive degradation of perfluoroalkyl-containing compounds, such as perfluoroalkyl sulfonates, by activated carbon (AC) supported zero valent iron-nickel nanoparticles (nNi0Fe0).
Abstract:
Disclosed is a method of detoxifying asbestos by using a room-temperature recrystallization scheme. The method includes heat-treating a rock or slate containing asbestos; and putting the heat-treated rock or slate in an aqueous solution, to which organic acid is added, to allow the heat-treated rock or slate to react with the aqueous solution having the organic acid.
Abstract:
A method for dehalogenation detoxication of halogenated aromatic and/or cyclic compounds, based on the fact that at least one halogenated aromatic and/or cyclic compound is heated on a support matrix in a closed system at a temperature of 200 to 500° C. in the presence of copper in metallic form and/or in the form of copper compounds, a hydrogen donor, carbon and at least one additional reducing substance, capable of reducing cupric and cuprous ions to elemental copper at the above temperature.
Abstract:
Emulsified systems of a surfactant-stabilized, biodegradable water-in-solvent emulsion with bimetallic particles contained with the emulsion droplets are useful at removing PCBs from ex situ structures. The hydrophobic emulsion system draws PCBs through the solvent/surfactant membrane. Once inside the membrane, the PCBs diffuse into the bimetallic particles and undergo degradation. The PCBs continue to enter, diffuse, degrade, and biphenyl will exit the particle maintaining a concentration gradient across the membrane and maintaining a driving force of the reaction.
Abstract:
A process of washing plastics contaminated with polychlorinated biphenyls (PCBs) is provided to reduce the concentration of the PCBs. A two-step process includes a first washing step using a selected washing solution or solvent, such as, a non-flammable solvent, and followed by a second step using thermal desorption. The two-step process enables reducing the concentration of PCBs in polymers, such as recovered from shredder residue, for example, to as low as 0.253 PPM. One of the preferred solvents is Perchloroethylene.
Abstract:
The subject invention provides a potentially economically viable method for the preparation of hydrogen peroxide (H2O2) in deep eutectic solvents (DES). H2O2 is then used for the destruction of small to large quantities of sulfur and nitrogen mustards and lewisite, their homologous/analogues, and similar chemical warfare agents at ambient conditions in DES without producing any toxic by-products. Furthermore, H2O2 has been used for the destruction of small to large quantities of halogenated hydrocarbons, their homologous/analogues, and similar hazardous chemicals at ambient conditions. H2O2 can be formed by either the electrochemical reduction of oxygen in DES in the presence of water or by dissolving Group 1 (alkali metals) or Group 2 (alkaline earth metals) superoxides, e.g. potassium superoxide, in DES in the presence of water, with/without chemicals used for the enhancement of the solubility of the metal superoxide in the DES, e.g. crown ethers.
Abstract translation:本发明提供了在深共晶溶剂(DES)中制备过氧化氢(H 2 O 2)的潜在的经济可行的方法。 然后,H 2 O 2用于在环境条件下在DES中破坏小量至大量的硫和氮芥末和蛭石,它们的同源/类似物和类似的化学战剂,而不产生任何有毒的副产物。 此外,H2O2已被用于在环境条件下破坏小到大量的卤代烃,它们的同源/类似物和类似的有害化学物质。 H 2 O 2可以通过在水的存在下在DES中的电化学还原或通过溶解第1族(碱金属)或第2族(碱土金属)超氧化物,例如, 钾过氧化物,在有水存在下的DES中,有/没有用于提高金属超氧化物在DES中的溶解度的化学品,例如。 冠醚。
Abstract:
A method for dehalogenative hydrogenation for aromatic polyhalogenated compounds comprising, making progress the dehalogenative hydrogenation reaction of said aromatic polyhalogenated compounds, under the presence of aromatic polyhalogenated compounds, inorganic basic aqueous solution as a scavenger of halogenated hydrogen generated by the dehalogenative hydrogenation of said aromatic polyhalogenated compounds, isopropylalcohol as a hydrogen supplying agent at the dehalogenative hydrogenation reaction and catalysts which catalyzes the dehalogenative hydrogenation reaction of said aromatic polyhalogenated compounds consisting of at least organic nickel complex and PPh3.
Abstract:
A bed of calcium oxide and/or barium oxide in particulate form is continuously moved through a contact reaction zone such that it enters into countercurrent reaction with the feedstock and the reaction is performed in a reaction column equipped with an agitating/moving device by which the halide which is the product of reaction between the organic halide and the oxide is continuously discharged to the outside of the reaction zone.