Study On The Performance For Adsorbing Of Phosphorus And Arsenic By The Modifide Attapulgite

In recent years,laundry detergent,printing and dyeing waste water pollution and its damage has been a growing cause for concern,seek harmony with the environment,methods of repairing green environmental governance has become the focus of research.Jingyuan,Gansu attapulgite clay is a kind of environmental restoration and purification of functional materials,has a very good compatibility with the environment.As an adsorbent,Jingyuan,Gansu attapulgite clay with high specific surface area,porosity,polarity,and other features,its price is cheap,high absorption capacity,various advantages such as abundant and renewable resources has aroused people's attention.The experimental samples in this paper comes from JingYuan GanSu.After purified respectively with different volume fraction of sulfuric acid,hydrochloric acid,acetic acid and organic reagent to the activation of modified sample.So we got a lot of differents modified sample to experiment.And use the a variety of adsorbent to adsorption of phosphorus and arsenic carried out experimental study in liquid phase.To study the adsorption characteristics of samples between various modified samples and adsorption properties.And by controlling the modification conditions of adsorption experiments to explore the various modified samples on the adsorption characteristics of phosphorus and arsenic.Such as pH,temperature,time,etc.It was found that:3%sulfuric acid modified samples,5%hydrochloric acid modified samples,8%acetic acid modified samples,and 0.7/5 g organic modified samples had a very good adsorption efficiency in all the modified samples.And they are on the adsorption of phosphorus efficiency is the best about 2h.Compare these modified samples is proved:3%sulfuric acid modified samples is have a good adsorption efficiency by compared to other modified samples under the same experimental conditions.For the optimal experimental conditions about 3%sulfuric acid sample of adsorption to phosphorus:Adsorbent additive quality 0.5 g,2.5 hours,35?,pH =6.In this case,the sulfuric acid modified samples on phosphorus adsorption rate is as high as 85.16%.We can also be concluded that the influence of main factors influencing order is quality>reaction time>temperature>pH from the orthogonal table.By the adsorption of arsenic in the use of modified sample experiment,we have found that:the 3%sulfuric acid modified samples is have a good adsorption efficiency by compared to other modified samples under the same experimental conditions.Adsorbent additive quality 0.5 g,2.5 hours,35?,pH = 6.In this case,the sulfuric acid modified samples on arsenic adsorption rate is as high as 75.45%.We can also be concluded that the influence of main factors influencing order is quality>reaction time>temperature>pH from the orthogonal table.By the end of the article,We use the kinetic and thermodynamic model research to explain the truth of the adsorption experiments.We believe that the modified sample of phosphorus and arsenic adsorption process is a chemical adsorption.