Abstract

The invention relates to a composite textile consisting of natural and/or synthetic and/or artificial fibres and lignocellulosic particles entangled between said fibres, comprising more than 30 wt. % of said lignocellulosic particles. The invention also relates to the method for the production thereof and to the uses of same.

IPC Classes  ?

• D04H 1/407 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties containing absorbing substances, e.g. activated carbon
• B01J 20/24 - Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• D04H 1/4266 - Natural fibres not provided for in group

Abstract

The invention relates to the use of a composite textile of natural and/or synthetic and/or artificial fibres and lignocellulose particles mixed with said fibres comprising more than 30 wt.% of said lignocellulose particles in order to trap the metals and/or metalloids and/or radionuclides and/or biocides present in water.

IPC Classes  ?

• D04H 1/407 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties containing absorbing substances, e.g. activated carbon
• B01J 20/24 - Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• D04H 1/4266 - Natural fibres not provided for in group

Abstract

The subject of the invention is a method for recovering radioactive nuclides and/or heavy metals fixed in lignocellulosic masses, notably crusts from filter cartridges, characterized in that it comprises the following steps: the lignocellulosic masses laden with radioactive nuclides and/or heavy metals are placed in a "deep bed" chamber, this raw material is heated to a temperature of at least 450°C in the absence of oxygen, in order to achieve a pyrolysis reaction; the pyrolysis ash containing the radioactive nuclides and/or heavy metals is processed; the gases emanating from the pyrolysis reaction are continuously processed. The invention also covers embodiments of the device.

IPC Classes  ?

• G21F 9/32 - Processing by incineration
• B01D 53/64 - Heavy metals or compounds thereof, e.g. mercury

Abstract

The invention relates to a method for treating a lignocellulosic substrate for the adsorption of radionuclides in fluids loaded with radionuclides, characterised in that it comprises the following steps comprising: preparing the divided lignocellulosic material by rinsing and grain-size grading; subjecting the lignocellulosic material to oxidation; activating the material by means of acid treatment; and rinsing. Specifically, the oxidation is a Fenton reaction. The invention also relates to the use of lignocellulosic material treated by this method.

IPC Classes  ?

• B01J 20/24 - Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• G21F 9/12 - Processing by absorptionProcessing by adsorptionProcessing by ion-exchange

Abstract

The invention relates to a detector (20) for detecting radon and the decay products thereof in the surrounding air, including in particular aerosols, characterised in that it comprises: a silicon pellet having a PN junction with a deserted area, for transmitting signals under the action of the radiation generated by radon and said decay products; a passivation layer (22) covering said silicon pellet and enabling the operation of said detector in open air; and a conducting layer (24) covering the passivation layer and defining a radionuclide collecting electrode. The invention also relates to a detection device including said detector.

IPC Classes  ?

• G01T 1/14 - Electrostatic dosimeters
• G01T 1/178 - Circuit arrangements not adapted to a particular type of detector for measuring specific activity in the presence of other radioactive substances, e.g. natural, in the air or in liquids such as rain-water