xOOH), in which a percentage of 0.05 to 25% of iron atoms has been isomorphically substituted by Mn(IV) atoms. Its production takes place in a continuous two-stage flow reactor at weakly acidic conditions (pH 4-7) and high redox (300-800 mV). The material can be used for the removal of both pentavalent and trivalent arsenic as well as other heavy metals form water. More specifically, its adsorption capacity and selectivity depending on the trivalent and pentavalent arsenic water content, are determined by the manganese percentage and the compact or hollow morphology of its structural unit which can be both controlled by the parameters of the synthesis procedure.
C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
B01J 20/06 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
The present invention refers to a method for the synthesis of an adsorbing material consisting of a single-phase tetravalent manganese feroxyhite (ō-Fe(1-x)MnxOOH), in which a percentage of 0.05 to 25 % of iron atoms has been isomorphically substituted by Mn(IV) atoms. Its production takes place in a continuous two-stage flow reactor at weakly acidic conditions (pH 4-7) and high redox (300-800 mV). The material can be used for the removal of both pentavalent and trivalent arsenic as well as other heavy metals form water. More specifically, its adsorption capacity and selectivity depending on the trivalent and pentavalent arsenic water content, are determined by the manganese percentage and the compact or hollow morphology of its structural unit which can be both controlled by the parameters of the synthesis procedure.
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
B01J 20/06 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
The invention concerns the liposome of textile auxiliary agent consisting of a solid nucleus formed by a textile auxiliary agent and of a membrane formed by a phospholipid and optionally by a surfactant, cholesterol and/or water-soluble polymer of cationic type, wherein the content of the textile auxiliary agent referenced to the total weight of the liposome is in the range of 80-99.5 % wt., the content of the phospholipid is in the range of 0.5-20 % wt., the content of cholesterol is up to 19.5 % wt., the content of the surfactant is up to 19.5 % wt., the content of the water-soluble polymer of cationic type is up to 19.5 % wt., whereas the liposome is a solid particle. The textile agent is a salt or a dispersant. The invention further concerns a method of preparation of the liposomes of textile auxiliary agent and a preparation containing these liposomes.
patents
