The Research On Adsorption Kinetics And The Retardation Factor Of Persistent Organic Pollutants-polychlorinated Biphenyls10in Sediments Of Weihe

Organic matter in groundwater pollution is increasingly serious,so groundwater protectionand pollution prevention issues become the one of the hot issues in the world. PolychlorinatedBiphenyls10is one of the very focus on the first12kind of Persistent Organic Pollutantsunder international controlled,it can spread to everywhere in the form of air,it can cause skin,liver, nervous system, reproductive system, immune system disorder,or even cancerous, forhuman life, growth and reproduction caused serious threat,this has become one of a globalimportant pollutants, now we banned that production and use.In this paper, the weihe river sediment solid medium sand sample as the research object,In fully understanding the regional hydrological and geochemical conditions, researchadsorption characteristics and influencing factors on the solid medium sand sample of PCB10.The study of the weihe river water pollution control,and PCB10in the guidance of thegroundwater environment pollution mechanism in weihe river basin has a far-reachinginfluence,and to further explore the prevention and control of PCB10contaminants andremoving methods, for the groundwater environmental monitoring, prevention and control ofpollutants and risk assessment provides great theoretical scientific value.1.Non-equilibrium adsorption isothermal study shows: quick adsorption of solid mediumsample period no more than3h, in other words, adsorption of PCB10within0~3h is rapidincrease to the peak. Solid medium sample in about7h after adsorption, the adsorptionvolume is small, this is a slow phase equilibrium phase, reach the apparent adsorptionequilibrium time no more than10h.2.The isothermal balance adsorption study shows: In the solid-liquid adsorption system,dual mode model（Linear+Langmuir model）can better describe the isothermal balanceadsorption process, by using the experimental dual-mode model equation fitting,under thecondition of static PCB10sample in medium partition coefficient of16.392mL/g, theLinear+Langmuir dual mode model obtained under different initial concentrations, retardationfactor Rd of PCB10in sand medium decreases with increasing concentration.3.Factors affecting test research shows that: in experimental study of particle sizedistribution, solid medium sample of solute PCB10with the decrease of the particle size, theadsorption ability enhancement;environmental Ph value in the experiment research, Ph valueof solid medium sample adsorption does not affect the ability of PCB10; in solid-liquidadsorption system of the sample in solid medium(different organic matter content)and PCB10,organic matter content of the solid medium sample increased, the solid mediumsample of PCB10solute adsorption ability enhancement;In different concentrations of PCB10experiment, solid medium sample of PCB10of the solute adsorption capacity increased withthe increase of concentration of PCB10, the more rights.