纳米吸附材料对放射性重金属污染废水的吸附效果研究OA

A new metal organic framework adsorbent material MKA-200Fe was prepared by hydrothermal synthesis using metal iron powder and terephthalic acid as the main raw materials.This material not only has the advantages of low toxicity and low cost,but also has good thermal and water stability,and has a wide range of application scenarios.The adsorption material was characterized and analyzed by infrared and X-ray Photoelectron Spectroscopy(XPS)to study its adsorption effect on radioactive heavy metal contaminated wastewater.Research has shown that as the pH value increases,the adsorption capacity of Eu and Cs elements gradually increases;when the pH is 8,the adsorption material reaches saturation and the adsorption capacity reaches its maximum;the adsorption capacity of the adsorbent material for Eu is higher than that for Cs element,with a maximum adsorption capacity of 65 mg/g for Eu and 48.5 mg/g for Cs;with the passage of time,the absorption of Eu and Cs elements by the adsorbent material slowly increases,with Eu having a higher adsorption capacity than Cs;when the adsorption time reaches 150 min,the adsorption capacity of the two elements reaches its maximum value;K+has a promoting effect on the adsorption of Eu and an inhibitory effect on the other three ions,ranked in the order of Ca2+＞Mg2+＞Na+according to their inhibitory ability;Four ions have a significant inhibitory effect on the adsorption of Cs,ranked in order of inhibitory ability as K+＞Na+＞Ca2+＞Mg2+.