Pollution Pattern of Formaldehyde and TVOC in Indoor Air and Its Control Measures

摘要

Based on the previous research, the experiment of ammonia nitrogen degradation in water withsediment has been set-up. The sample of sediment was selected from Zhang river. The degradationregularity of ammonia nitrogen in water with sediment was studied systematically. Under the differentparameters as sediment concentration, sediment size and different initial concentrations of ammonianitrogen, a series of experiments on the degradation of ammonia nitrogen in water with sediment werecarried out. First-order kinetics was adopted to fit the experimental results, and the influences of thesediment concentration and the particle size on the reaction rate are discussed. The research showsthat the degradation process of ammonia nitrogen and organisms both are conformed to the first-orderkinetics and the higher the sediment concentration and smaller the particle size are, the greater is thereaction rate constant.