Gel comprising reactive oxidant release agent The invention provides a gel composition comprising 5% to 75% w/w of an inorganic gelling agent other than silica based gelling agents,0.5-60 % w/w, preferably 0.5 to 30 % w/w, of an inorganic oxidant release agent and at least 20 % w/w of water, and possibly a stabilizer. It further provides a process for making same, comprising preparing a first solution of a dibasic phosphate salt in water comprising dissolved oxidant release agent, preparing a second solution of a alkaline earth metal salt in water comprising dissolved oxidant release agent, and mixing both, first and second solutions, in a ratio of 1 to 1 to 10 to 1, followed by a concentration step. The gel composition of the invention is suitable for soil, sediment groundwater or water remediation purposes and disinfection or wound healing purposes.
This invention concerns a new material with enhanced catalytic properties, produced by mechanical alloying of microbially encapsulated metallic (or zerovalent) nanoparticles with a second metallic component. The bioencapsulation ensures a maximized contact area for molecular restructuring, since the microbial biomass can prevent agglomeration during the mechanical alloying process. The resulting product is a metallic alloy with at least 1 % of the material dry weight comprising microbial biomass and with enhanced catalytic properties.
B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
B01J 37/02 - Impregnation, coating or precipitation
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
B22F 9/02 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
C07C 1/26 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only halogen atoms as hetero atoms
B01J 31/06 - Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
A62D 3/37 - Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by reduction, e.g. hydrogenation
C02F 1/70 - Treatment of water, waste water, or sewage by reduction
3.
SYSTEM FOR INJECTING BIOACTIVE COMPOUNDS INTO UNDERWATER SEDIMENTS
A system for continuous injection of compounds into an underwater sediment volume (6) which comprises: a mixing tank (8), a pump, an injection line, apparatus (1) for continuous injection of compounds. The latter comprises a main support member (4, 10), a framework (14) supporting a collection ramp (16) fitted with injection lines (18) and harrowing means (24), bearing means (36) supporting the framework (14) above the sediment volume (6) and floating means (36) allowing the framework to remain at the surface of the sediment volume (6).
Object of this invention is a catalyst and a process for the hydrodehalogenation of halogenated and polyhalogenated aromatic and aliphatic hydrocarbons or for reductive conversion of recalcitrant environmental contaminants in soil and sediments comprising a polymeric phase constituted of a mixture of biodegradable polymer, oligomer and monomers dissolved in a biodegradable solvent and a catalytic component constituted of zerovalent metal.
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