Views:0 Author:Site Editor Publish Time: 2021-05-11 Origin:Site
Polycyclic aromatic hydrocarbons (PAHs) are a kind of polar organic pollutants, and their potential harm to the environment has attracted extensive attention. In recent years, studies have shown that a simple treatment method can prepare modified aerobic granular sludge (AGS) by hydroxypropylation- β- Cyclodextrin- β- CD.
Using HP- β- Using CD modified AGS as adsorbent, the removal rate of specific polycyclic aromatic fluoranthene (FLA) can reach 95%, and the removal rate of unmodified AGS can reach 80%. Fla removal is related to initial concentration, temperature and ion concentration (Na +, Mg2 +). When the initial concentration of FLA is 10,15,20 μ The removal rates of FLA were 96.27%, 94.26% and 93.69%, respectively. 15 years old ° C. 30 ° C and 45 ° C. Removal rate of FLA (15) μ 20% to 94. 84% and 95. 73%. The presence of Na + and Mg2 + ions leads to the degradation of PAHs removal performance. With the increase of Na + and Mg2 + concentration, the removal rates of PAHs decreased by 3.9% and 6.5% respectively. These results indicate that cyclodextrin, as the active center of the composite modified polymer network, has a potential application prospect in the treatment of polycyclic aromatic hydrocarbons (PAHs) wastewater.