Study On Functionalized Loess And Its Adsorption Properties

With the rapid development of industrialization process, the polluted water has brought more and more seriously environmental and ecological problems, which are getting worse and worse.Therefore, it is urgent to improve the technology of the water treatment. Natural polymer, as a water treatment agent, arises more attention in recent years because of its various kinds, wide distribution and environmental friendliness. This paper based on the forefront of polymer water treatment agent, using cheap natural inorganic polymer as a water treatment agent, so as to increase water treatment effectively and reduce the production cost of adsorbent. Namely, using simple and cheap loess resources as raw material, this paper applied them to remove heavy metal ions and dye wastewater, and obtained no secondary pollution adsorbent with high adsorption property and low cost. The paper consists of following parts.First, this paper summarized natural loess’ s modification, then studied its application and development in wastewater treatment and other fields, such as environmental management and architecture.Second, this paper used the loess as the raw material and modified the loess with itaconic acid and methylmethacrylatehydroxylethyl and N-vinylpyrrolidone.As a result, LC-PIHN was produced. Furthermore, the obtained LC-PIHN was characterized by FT-IR, SEM, TG and other methods of characterization. The results show that, the LC-PIHN was successfully synthesisedThird, this paper explored the adsorption ability of LC-PIHN for Cu(II) and MG,analysied the effects of amount of adsorbent, initial concentration, pH and temperature on adsorption, and discussed the adsorption kinetics and isotherms of LC-PIHN. The results show that: the adsorption capacity of Cu(II) got to 197.65 mg/g. The removal rate of Cu(II) got to 98.82% at room temperature and the decolorization rate of MG got to 97.29%, the adsorption capacity got to 97.29 mg/g. The adsorption isotherms of Cu(II) and MG well fit with the Freundlich and Langmuir isotherm order, respectively. The adsorption kinetics of Cu(II) and MG well fit with the pseudo-second order kinetics model.Fourth, this paper used the loess and chitosan as the raw materials and modified the loess with methylacrylic acid. As a result, PMAA-CTS/LC was produced Furthermore, the composition and structure of PMAA-CTS/LC obtained were characterized and analyzied by FT-IR, TG and SEM.Meanwhile adsorption ability of PMAA-CTS/LC for Pb(II) and MB was investigated. And the process of adsorption well fits with the pseudo-second order kinetics model and the Freundlich isotherm order.