Preparation Of Two Different Porous Materials And Their Adsorption Properties For Heavy Metal Ions In Waste Water

Water pollution caused by heavy metal ions is considered to be one of the most serious environmental problems in the world due to its toxicity accumulation in the organism and non-biodegradation.How to economically and efficiently purify the pollution of heavy metal ion wastewater has become one of the most important issues facing modern society.Among various wastewater treatment technologies,adsorptive separation technology has shown a broad application prospect.As the core material of adsorption and separation technology,porous materials have a crucial influence on their adsorption and separation performance.Further development of new types of highly efficient,inexpensive,non-toxic porous adsorbent materials has become a problem that needs to be solved for the development of heavy metal ion wastewater treatment materials to a higher level.To solve this problem,two different porous materials were prepared in this paper,and the removal performance of heavy metal ions in wastewater was systematically studied for two different porous materials,in order to provide a new application of porous materials in the removal of heavy metal ions in wastewater.The research ideas and basic research data,the main research content is as follows:Using sodium alginate and polyethylene oxide as precursors,and calcium ions as cross-linking agents,forming a new type of carbon aerogel by forming a bulk hydrogel and freeze-drying and further carbonizing,the calcium ion can be simple Removed with acid.Synthetic carbon aerogels were characterized by scanning electron microscopy?SEM?,Raman spectroscopy and X-ray photoelectron spectroscopy?XPS?.The results show that the carbon aerogel after removal of Ca²⁺has better performance in removing metal ions such as Cu?II?,Cr?VI?,Cd?II?and Pb?II?.The influences of different factors on the adsorption capacity of heavy metal ions,such as the pH value of the solution,the initial ion concentration,and the adsorption time,were also studied.Finally,the adsorption kinetics and adsorption isotherm models of heavy metal ions after being adsorbed on the carbon aerogel were studied.Two different tubular conjugated microporous polymers were synthesized using1,3,5-triethynylbenzene and 2-amino-3,5-dibromopyridine or 1,5-dibromonaphthalene.The morphologies,structures and thermal stability properties of the obtained CMPs were studied by scanning electron microscopy?SEM?,thermogravimetric analysis?TGA?,¹³CCP/MAS solid state NMR and Fourier transform infrared spectroscopy?FTIR?.Secondly,the adsorption properties of Cu?II?in tubular conjugated microporous containing amino groups were studied.The influence of pH value,initial ion concentration,adsorption time on the process was also studied.Finally,two different tubular conjugates were compared.Microporous polymer adsorption capacity for different heavy metal ions.