110 results about "Arsenite" patented technology

The invention discloses a remediation device for arsenic-contaminated soil. According to the remediation device, tooth parts of semi-conical gears mesh with a first cone gear, a storage box is arranged at the upper end of the left side of a device body, the lower end of the first cone gear is fixedly connected to the upper end of a screw rod, the screw rod is connected to the upper end of the device body in a rotating mode through a bearing, the lower end of the screw rod I is connected to a sleeve in a threaded mode, the two sides of the sleeve are connected to guide grooves in a sliding mode, the guide grooves are fixedly connected to the side wall of the storage box, the lower end of the sleeve is fixedly connected to a compression roller, the bottom of the storage box communicates witha material guide pipe, the right side of a driving shaft is fixedly connected to a second cone gear, and the second cone gear meshes with a third cone gear. The remediation device has the advantagesthat the first cone gear is driven to rotate forward and reversely in a reciprocating mode through the toothed parts of the semi-conical gears so as to drive the screw rod to rotate forward and reversely, the screw rod drives the sleeve to move up and down in a reciprocating mode along the guide grooves under the action of threads so as to drive the compression roller to move up and down, the compression roller which moves up and down in a reciprocating mode drives a plug column to block the material guide pipe in a reciprocating mode so as to realize intermittent feeding, and meanwhile, the compression roller which moves up and down crushes soil blocks at the bottom of the storage box.

The present invention relates to the use of arsenic compounds such as sodium meta arsenite (NaAsO2), arsenic trioxide (As2O3), and arsenic hexoxide (As4O6) or combinations thereof, for the treatment of painful, hyperalgesic and / or inflammatory conditions. The present invention also relates to compositions containing the above arsenic compounds for use in the treatment of pain, inflammation and immunological and autoimmune diseases and disorders.

Arsenic trioxide, an inorganic compound, is commercially available anti-cancer agent but it carries significant toxicity. Organic arsenicals, on the other hand, are much less toxic, to the extent that the methylation of inorganic arsenic in vivo into organic arsenicals has been considered a detoxification reaction. New organic arsenic derivatives have been synthesized, including S-dimethylarsino-glutathione, S-dimethylarsino-thiosuccinic acid and S-dimethylarsino-thiobenzoic acid, and established its potent in vitro cytotoxic activity against numerous human tumor cell lines, both of solid and hematological origin, as well as against malignant blood cells from patients with leukemia. Results form a basis for the development of S-dimethylarsino-glutathione, S-dimethylarsino-thiosuccinic acid, S-dimethylarsino-thiobenzoic acid, and other organic arsenicals as an anti-cancer therapy, combining high efficacy with very low, if any, toxicity.

The present invention relates to a method of treating cancer in a subject in need thereof, by administering to the subject a combination of sodium meta arsenite and / or arsenic trioxide and a cytotoxic anticancer agent, such as cisplatin, adriamycin, and taxane, such as larotaxel, orataxel, tesetaxel, docetaxel or paclitaxel. The arsenic compound(s) and cytotoxic anti-cancer agent may be administered together in a composition or separately as a combination therapy.

The invention discloses a method for screening trichoderma asperellum and application thereof. The method comprises the following steps of: collecting an arsenic pollution soil sample; separating fungi from the soil sample in a laboratory; purifying the fungi, and transferring the purified fungi to a selective culture medium of trichoderma; and culturing the fungi in different arsenic concentrations by taking a fungus strain of which the growth condition is the best on the selective culture medium as an object, and observing the growth condition of a bacterial colony and the tolerance of the bacterial colony on arsenic to screen the trichoderma asperellum.

The invention discloses an arsenic sulfide waste residue recycling treatment method, which comprises the following steps: performing alkaline leaching to obtain sulfo-arsenite or sulfo-arsenate solution, filtering to remove waste residues through a filter, to obtain alkaline leachate, then performing oxidation desulfurization, so as to oxidize sulfo-arsenite or sulfo-arsenate into sulfo-arsenite or arsenate ions, then filtering and separating elemental sulfur through another filter to obtain arsenite or arsenate solution, recovering acid-base from the arsenite or arsenate solution by utilizing a bipolar membrane device, returning base solution for alkaline leaching and acid solution for crystalization and preparation of As2O3 or As2O5, performing electrodialysis or reverse osmosis concentration on residual liquor in a bipolar membrane salt chamber, returning concentrated liquor as inflowing water of the salt chamber of the bipolar membrane device, and draining or recovering fresh water. According to the arsenic sulfide waste residue recycling treatment method, the problems that for the traditional arsenic sulfide waste residue treatment method, consumption is large, the content of arsenic in effluent water does not reach the standard, the recycling rate is low, the technological process is complicated, secondary pollution exists and the like can be solved, the content of arsenic in effluent water reaches the standard, the recycling rate of As and S is high, the advantages of low consumption, low running cost, simple technological process and the like can be achieved.

The invention discloses an organoarsenic compound. The organoarsenic compound has the following structural formula as shown in the specification, wherein n is 1 or 2; R, R1, R2, R3, R4 and R5 are respectively and independently amino, R6-CO-NH, R7-CO-O, alkyl, aryl, a heterocyclic substituent, alkoxyl, alkylamino, a halogen atom, nitro, hydroxyl or a hydrogen atom; R6 is alkyl, aminoalkyl or aryl;R7 is alkyl, aminoaryl or aryl. The organoarsenic compound has good inhibitory activity for thioredoxin reductase, has strong cytotoxicity for tumor cell HL-60, and can be used for preparing a thioredoxin reductase inhibitor or an antitumor drug with thioredoxin reductase as a target spot.

The present disclosure provides an iron-modified montmorillonite adsorbent for effectively removing heavy metals from water. The iron modified montmorillonite can be synthesized using a facile intercalation wet synthesis procedure that requires low energy and minimal use of chemicals. The iron modified montmorillonite adsorbent effectively removes heavy metals, such as arsenite, strontium, barium, phosphate, from water.

The invention discloses an aerobic arsenic methylation bacterium SM-1 of cytophagaceae and application of the arsenic methylation bacterium. A gram-negative bacterium, which is quite strong in arsenic methylation and volatilization capacities, is obtained through isolation and identification; and the strain belongs to a new genus and a new species of the cytophagaceae, which is named as arsenicibacter palustris SM-1 and preserved in China Center for Type Culture Collection on October 15, 2014 with preservation number of CCTCC M2014457. Compared with the prior art, the bacterium disclosed by the invention has the following beneficial effects: the provided bacterium strain is quite strong in arsenic methylation and volatilization capacities; and the strain is applicable to arsenic pollution remediation of paddy soil and is capable of finally relieving the damage from arsenic pollution in a paddy field.