| The thesis takes the productive DDNP wastewater in a certain chemical factory as anexample, reviewed the composition and the present situation of treatment of DDNP, haspointed out the decisive problem in the wastewater treatment. The natural zeolite, theHDTMA modified zeolite and the CPB modified zeolite were used to treat DDNP wastewaterseparately by experiment, the removal rate of CODcr and the chroma in wastewater are thenorm of the investigation, the result of three kinds of zeolite treating DDNP wastewater wascompared and the optimum conditions modified by HDTMA and CPB of natural zeolite wereconfirmed. By the single factor experiment the CPB modified zeolite treating wastewater wasthorough studied and the reasonable wastewater processing craft was confirmed.(1) The natural zeolite can be modified by the cation surface-active agent of HDTMAand CPB, it's adsorb ability is strengthened after being modified. The optimum conditions forHDTMA modified zeolite are: HDTMA solution's concentration is 1%;modifying time is36h;modifying temperature is 30 ℃ . The optimum conditions for CPB modified zeolite are:CPB solution's concentration is 1%;modifying temperature is 25℃;modifying time is 36h.(2) The DDNP wastewater can be treated by the natural zeolite, the HDTMA modifiedzeolite and the CPB modified zeolite. the CODcr and chroma removal rate of the HDTMAmodified zeolite and the CPB modified zeolite treating wastewater far more higher than thenatural zeolite.(3) The optimum adsorbing temperature of CPB modified zeolite treating DDNPwastewater is 35℃, the optimum adsorbing time is 1h. When the volume of wastewater is5mL, the modified zeolite's consumption is 4g.(4)The CPB modified zeolite is better than the HDTMA modified zeolite in function.(5)The saturated modified zeolite can be rebirthed by the aqua of NaOH.The research has some realistic functions in making use of natural zeolite and treatmentof DDNP wastewater.
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