3results about How to "Fast removal" patented technology

Provided is a ceria particle for chemical mechanical polishing, and a slurry composition for chemical mechanical polishing containing the same. The surface of the ceria particle contains Ce 3+ and Ce 4+ When the ceria particle of the embodiment of the present application is used, by increasing the proportion of Ce 3+ on the surface of ceria, a high oxide film removal rate and an oxide film polishing selectivity ratio can be exhibited in a low content range, despite a small particle size.

The application relates to the technical field of wastewater treatment, and discloses a method for rapidly degrading phenol by using iron in phenol-containing wastewater, wherein safe and nontoxic cysteine is selected as a reaction initiator, and meanwhile, reduction and complexation are realized, so that the reaction is rapidly started, and the pH range of a traditional Fenton reaction is widened; Cu 2+ is selected as a reaction intensifier, Fe 3+ / Fe 2+ circulation is accelerated, phenol is rapidly degraded, and the degradation of other organic pollutants is synergistically improved; without preparing and adding complex and high-cost iron-containing activators, a small amount of iron contained in the wastewater is used as a Fe 2+ source, and recycling is formed in the system, so that the pollutant removal speed is greatly improved, and the generation of iron sludge is reduced. The technology has the advantages of being green, efficient, simple to operate and low in cost.

The present application belongs to the technical field of groundwater pollution remediation, and particularly relates to a biological remediation composition for remediation of contaminated groundwater, a remediation agent, and a preparation method and application thereof. The biological remediation composition for remediation of contaminated groundwater comprises a composite bacterial flora, a slow-release carrier material, a nutrient slow-release agent, a surfactant, and a stabilizer; the composite bacterial flora is composed of the following bacterial strains: Bacillus subtilis, Pseudomonas putida, Desulfovibrio and Serratia marcescens. The biological remediation composition provided by the present application has high remediation efficiency and improves the removal rate of diesel oil, chlorophenol, and sulfadimethoxine.