摘要:
Provided are astexin-1, astexin-2 and astexin-3 lasso peptides, which are based on sequences identified in Asticaccaulis excentricus, and methods of making and using same. Astexin-1 is highly polar, in contrast to many lasso peptides that are primarily hydrophobic, and has modest antimicrobial activity against Caulobacter crescentus, a bacterium related to Asticaccaulis excentricus. The solution structure of astexin-1 was determined, revealing a unique topology that is stabilized by hydrogen bonding between segments of the peptide. Astexins-2 and -3 are intracellular lasso peptides.
摘要:
A method comprising a) mixing and dissolving the solid hazardous heavy metal-containing composition with an acid solution; b) precipitating the heavy metal from the hazardous heavy metal acid composition; c) precipitating the heavy metal from the hazardous heavy metal acid composition with a heavy metal-precipitation agent; and d) separating out the heavy metal precipitate from the aqueous supernatant, whereby the heavy metal-precipitation agent comprises a diorgano-dithiophosphinic acid or the alkali metal or ammonia salts thereof.
摘要:
Methods of mercury decontamination are provided that include: contacting elemental mercury with a metal salt having a standard reduction potential sufficient to oxidize elemental mercury to an aqueous salt of mercury. In other aspects, methods of mercury decontamination are provided that include: contacting the metal surface with a solution comprising a metal salt having a standard reduction potential (E0) of greater than 0.85, thereby oxidizing a mercury contaminant to a soluble mercury salt.
摘要:
A bimetal oxysulfide solid-solution catalyst is provided. The bimetal oxysulfide solid-solution catalyst is represented by the following formula: CuxM(2)yOzSγ wherein M(2) includes monovalent Silver (Ag), divalent Zinc (Zn), Manganese (Mn), Nickel (Ni), Cobalt (Co), and Tin (SnII), trivalent Indium (In), Cerium (Ce), Antimony (Sb), and Gallium (Ga), tetravalent Tin (SnIV), or pentavalent Molybdenum (Mo), 0
摘要:
An apparatus comprising a conduit, a separator, a blower, and a mixing unit positioned on a portable unit that can be stationed at a drilling site. The conduit can be positioned at a sludge source such that a combination of a sludge and air is introduced into the conduit when a pressure in the conduit is reduced. The separator is coupled to the conduit and receives the combination from the conduit and separates the sludge from the air. The blower is in fluid communication with the separator and the conduit and decreases a pressure in them to continuously pull the combination of the sludge and the air from the source directly to the separator via the conduit. The mixing unit receives the material and the sludge at selectable rates and mixes them to generate a treated material that exhibits physical and chemical characteristics that allow placement in a landfill.
摘要:
Provided are astexin-1, astexin-2 and astexin-3 lasso peptides, which are based on sequences identified in Asticaccaulis excentricus, and methods of making and using same. Astexin-1 is highly polar, in contrast to many lasso peptides that are primarily hydrophobic, and has modest antimicrobial activity against Caulobacter crescentus, a bacterium related to Asticaccaulis excentricus. The solution structure of astexin-1 was determined, revealing a unique topology that is stabilized by hydrogen bonding between segments of the peptide. Astexins-2 and -3 are intracellular lasso peptides.
摘要:
Provided is a practically valuable and economically excellent insolubilizing material for a specific toxic substance: that is useful for insolubilizing treatment for a heavy metal or the like conducted by applying the insolubilizing material for a specific toxic substance to soil or on the surface of the soil; that is capable of effectively insolubilizing and immobilizing the heavy metal or the like; that is capable of making treated matter neutral so as to be reusable and environment-friendly; and moreover that is capable of imparting strength to the treated matter as necessary; and with which the heavy metal or the like is not re-eluted even when the treated matter is exposed to an environment under a neutral condition or an acidic condition. An insolubilizing material for a specific toxic substance to be used so that soil does not reach a strongly alkaline region of a pH of 11 or more, wherein the insolubilizing material for a specific toxic substance comprises an amorphous aluminum compound or a derivative thereof as a main component, or an insolubilizing material for a specific toxic substance to be used so that soil containing a heavy metal or the like does not reach a strongly alkaline region of a pH of 11 or more, the insolubilizing material for a specific toxic substance functioning also as a solidifying material, wherein the insolubilizing material for a specific toxic substance comprises gypsum obtained by adding and mixing, to the gypsum, the amorphous aluminum compound and the derivative thereof in a range of 0.5 to 60 mass parts relative to 100 mass parts of the gypsum, and a method for improving soil using the insolubilizing material for a specific toxic substance.
摘要:
It is an object of the present invention to provide a beneficial composition in order to detoxify the harmful compound containing arsenic etc. effectively and systematically and a method for detoxifying a harmful compound by using the composition. The composition for the alkylation according to the present invention is characterized in that the composition contains a cobalt complex. The method of detoxifying the harmful compound according to the present invention is characterized in that a harmful compound containing at least one element selected from the groups comprising arsenic, antimony and selenium is detoxified by the alkylation of the harmful compound, in the presence of the composition according to the present invention.
摘要:
The invention relates to a system and method for the substantially permanent biogeochemical stabilization of solids impacted with hexavalent chromium/Cr(VI), including chromite ore processing residue (“COPR”). The invention comprises a novel treatment method of adding amendment(s) to COPR or other chromate impacted solids for the purpose of (1) weathering COPR minerals (when present) to convert the minerals that control alkalinity of the COPR to non-alkaline forms and liberate incorporated hexavalent chromium (Cr(VI)) in the process; (2) providing a chemical reductant (ferrous iron) to rapidly and permanently reduce the available Cr(VI) to trivalent form (Cr(III)); and/or (3) supporting longer-term biogeochemical Cr(VI) reduction enhanced by recycling of the chemical reductant, ultimately rendering the material non-hazardous as measured by acceptable methods. Amendments include but are not limited to acids; sources of ferrous iron; fermentable organic carbon source(s); and/or a source of active anaerobic microbes.
摘要:
The invention provides an optimal method for stabilization of heavy metal bearing paint residue subject to acid and water leaching tests or leach conditions by addition of environment safe, worker safe, multi-media compatible, non-separating, non-embedding, stabilizing agent and optional complexing agent(s) to the blast media, thus allowing for pre-blending of stabilizer and blast media and field production of a uniform and steady state stabilizer within media for stabilization outside or within an OSHA containment building or collection device, such that leaching of heavy metals such as lead are inhibited to desired levels. The resultant stabilized paint residue and spent blast media mixture is suitable for on-site reuse, off-site reuse, or disposal as RCRA non-hazardous waste.