4 results about "Pentavalent Antimony" patented technology

The invention discloses a green detection method for determining trace heavy metal ion pentavalent antimony-Sb (V) in water based on a rhodamine B-cloud point extraction-atomic furnace graphite absorption method. The rhodamine B is used as a complexing agent of Sb (V), so that the color development is sensitive, and the complexing is stable. According to the method, the nonionic surfactant Triton X-114 is used as the extraction agent, the cloud point temperature is low, a complex can be efficiently extracted, a micelle phase is formed, the extraction agent is easily and effectively separated from a water phase, cloud point extraction is carried out under ultrasonic assistance to enrich and concentrate trace antimony, the enrichment factor is high, matrix interference in a water sample to be detected can be effectively eliminated, and the detection precision of Sb (V) is improved. By adopting a cloud point extraction technology, the use amount of an organic reagent can be effectively reduced, and the waste liquid treatment cost is reduced. According to the method, other oxidation methods can be combined, total antimony can be measured based on complexing color development of Sb (V), valence state distribution of free antimony can also be measured, and the method has wide applicability.

The present invention discloses a system for separating trivalent antimony and pentavalent antimony using a strong cationic resin, relating to the technical field of separation of trivalent antimony and pentavalent antimony. The specific steps are as follows: Step 1: Cleaning: Using a cleaning device, clean an SCX chromatographic column with 10% by mass sulfuric acid and ultrapure water; Step 2: Diafiltration: Introducing a sample solution into the SCX chromatographic column at a flow rate of approximately 1.5 ml / min, collecting the filtrate from the SCX chromatographic column, and rinsing it with ultrapure water. The rinsing liquid and the filtrate are collected together to form a separation solution for pentavalent antimony; Step 3: Eluting the captured trivalent antimony with hydrochloric acid at a flow rate of 1.5 ml / min. The present invention involves cleaning the SCX chromatographic column with sulfuric acid and ultrapure water; diafiltration: Introducing a sample solution into the SCX chromatographic column, collecting the filtrate from the SCX chromatographic column, and rinsing it with ultrapure water. The rinsing liquid and the filtrate are collected together to form a separation solution for pentavalent antimony; and eluting the trivalent antimony with hydrochloric acid, thereby facilitating the separation of trivalent antimony from pentavalent antimony.

The invention discloses a halotolerant bacterium with antimony reducing capacity and application, and belongs to the field of microorganism application, the halotolerant bacterium is named as Lactococcus sp. SY-2, the Lactococcus sp. SY-2 disclosed by the invention is specially separated from coastal mud flat wetland, is resistant to high salt, can reduce pentavalent antimony Sb (V) into trivalent antimony Sb (III), and can directly reduce adsorbed antimony. The Lactococcus sp. SY-2 has very high tolerance to antimony, and is suitable for repairing the environment with high antimony pollution. The Lactococcus sp. SY-2 can be used for ecological restoration of complex environments such as wetlands, mines and the like.

The present application relates to the technical field of contaminated soil remediation, and discloses a composite reagent for neutralization and passivation remediation of antimony mine acid soil and application thereof, which comprises finely ground blast furnace slag powder, ferrous sulfate heptahydrate and carbide slag. The present application utilizes the solid phase micro-interface acid etching mechanism among the components to pre-activate the alumina tetrahedral site on the surface of the slag, eliminate the hydration induction period, and solve the kinetic mismatch problem caused by the difference in dissolution rate of the easily soluble iron salt and the insoluble slag in the soil remediation process. The present application builds a crystalline environment of poor sulfur calcium aluminate, makes the antimony acid root ions in the soil enter the mineral lattice as a structural replacement component, realizes atomic-level chemical solidification of the antimony pollutants, reduces the antimony leaching concentration of the remediated soil under the condition of acid rain leaching, and utilizes the trace reducing components of the carbide slag to synergistically inhibit the generation of highly toxic pentavalent antimony, thereby realizing long-term and safe remediation of the acid soil.