62 results about "Polybrominated diphenyl ethers" patented technology

The invention relates to a method for removing toxic organic pollutants from sediment by using a plant, which is characterized by selecting seedlings or mature seedlings of an emergent aquatic plant such as Scirpus validus Vahl with a strong absorption capacity to toxic organic pollutants in the sediment, wherein the seedlings with a height of 60 cm are preferably selected. The method provided by the invention has the advantages that: Scirpus validus Vahl has a good remediation effect on the pollution of pentachlorophenol and polybrominated diphenyl ethers and / or deca-brominated diphenyl ether in the sediment, can remove 99% of pentachlorophenol in the polluted sediment within 90 days, and can remove 37.44% of deca-brominated diphenyl ether within 180 days; meanwhile Scirpus validus Vahl has a strong absorption and enrichment capacity to pentachlorophenol and polybrominated diphenyl ethers and / or deca-brominated diphenyl ether in the polluted sediment, and the root of Scirpus validus Vahl has enrichment capability to pentachlorophenol and deca-brominated diphenyl ether up to 2090 mu g kg<-1>dw and 200 mu g kg<-1>dw or above respectively; and Scirpus validus Vahl is an excellent remediation plant for the toxic organic pollutants in water environment sediment and is also a wetland emergent aquatic plant with aesthetic value.

The invention provides an ultrasensitive method for analyzing trace polybrominated diphenyl ethers in water. The method relates to a coated fiber and a solid-phase micro-extraction device containing the coated fiber as well as application of the coated fiber and the device, wherein the coated fiber comprises a fiber carrier and a coating material attached to the surface thereof, and the coating material is TpPa-1. By adopting the coated fiber, the high enrichment ratios, low detection limits, wide linear range, good repeatability and superior reproducibility are achieved.

Modified sepiolite used for a polyethylene corrugated pipe material and a preparing method of the modified sepiolite are disclosed. The modified sepiolite is prepared from following raw materials by weight: 85-105 parts of sepiolite, 10-15 parts of nanometer zirconium dioxide, 18-26 parts of shell powder, 4-7 parts of perfluoro alkyl ethyl acrylate, 2-5 parts of tallow fatty acid, 9-16 parts of glucose pentaacetate, 10-15 parts of gum dammar, 6-12 parts of shellac, 5-10 parts of walnut shell powder, 4-8 parts of ozokerite, 1-2 parts of distearyl dimethyl ammonium chloride, 40-50 parts of polybutylene terephthalate, 25-35 parts of an ethylene-ethenol copolymer, 10-15 parts of polybrominated diphenyl ethers, 5-10 parts of calcium hypophosphite, 2-3 parts of zinc laurate and 5-7 parts of auxiliary agents. The modified sepiolite and the method can significantly improve the dispersing property of the sepiolite in a polyethylene base material, intensifying adhesion of sepiolite-polyethylene interfaces, effective overcome problems that are hard dispersion, easy layering, much dust, and the like of the sepiolite at present, and improve mechanical strength, wear resistance, fatigue resistance, elasticity, machinability, and other properties of the polyethylene material.

According to the invention, Au nano-particles are synthesized; polybromodiphenyl ether is enriched on the surface of the Au nano-particles by a sample pretreatment method of firstly mixing and then centrifuging; and Raman characteristic lines of polybromodiphenyl ether are observed through a portable Raman spectrometer. It proves through a series of experiments that a sample preparation method and a target pollutant analysis method are simple to operate and rapid detection of polybromodiphenyl ether in an ambient substrate can be realized.

The invention discloses an online fast method for detecting active bromated phenoxy radicals in the environment, and belongs to the field of environment oriented analysis. Bromated phenoxy free radicals are thought to be an important intermediate for oxidation formation of bromated aromatic ring compounds in the environment, and have certain scientific significance to the discussion of the sources and forming mechanism of some persistent organic pollutants in the environment such as hydroxyl polybrominated diphenyl ethers and brominated dioxins. The invention adopts on-line ultraviolet induced photochemical reaction, establishes an analysis method for rapid capture of transient bromated phenoxy free radicals, and can also determine the generation amount of bromated phenoxy free radicals. The constructed detection method has good repeatability and reliability, and verification of different compounds confirms the accuracy and usability of the method.