Study On The Preparation Of Paper-based Carbon Materials And Catalytic Degradation Of Antibiotic Pollutants

In recent years,advanced oxidation processes（AOPs）have shown excellent potential in the field of environmental catalysis.In this work,three kinds of paper（extraction paper,toilet paper and printing paper）were fully pre-treated and modified,and then calcined at high temperatures to prepare three types of paper-based carbon（PBC）and the obtained products can be utilized as catalysts to activate oxidants and efficiently remove antibiotic pollutants in water based on AOPs.In the meantime,the techniques,like XRD,XPS,Raman,SEM,TEM and BET were employed to characterize the catalysts,and combined with cyclic tests,quenching experiments and electron paramagnetic resonance to evaluate the catalytic efficiency and clarify the mechanism,providing a unique idea for the treatment of antibiotic wastewater.This research provides the concept of transition from paper to catalyst,it is conducive to the development of advanced sewage treatment integration technology,and will get significant economic and social effects as well.The main conclusions of this work are as follows:（1）The paper-based carbon material embedded with enzyme-mimicking single-atom cobalt sites EMSA-Co/PBC can efficiently activate persulfate（PS）to remove SIZ with outstanding performance in a broad operating p H range（3.0-11.0）.The optimum conditions for the SIZ degradation were found to at p H 6.0,the PS dosage was 0.5 g/L,and the catalyst concentration was 0.2 g/L in the EMSA-Co/PBC+PS system.99.5%of SIZ were degraded via PS activation within 30 minutes,the TOC removal efficiency reached 89.3%within 120minutes,and the SIZ spiked pharmaceutical effluent degradation efficiency was up to 99.0%in this system.After five cyclic tests,the degradation efficiency of SIZ can still reach 95.4%,further proving the excellent stability and reusability of the EMSA-Co/PBC catalysts.（2）The paper-based carbon material supported by a zeolitic imidazolate framework crystal,namely ZIF-67/PBC can activate peroxymonosulfate（PMS）to a large extent to remove CIP with outstanding performance in a broad operating p H range（3.0-11.0）.The optimum conditions for the CIP degradation were found to at p H 7.0,the PMS dosage was 0.3 g/L,and the catalyst concentration was 0.1 g/L in the ZIF-67/PBC+PMS system.99.5%of CIP were degraded via PMS activation within 15 minutes,the TOC removal efficiency reached 94.7%within 120 minutes,and the CIP spiked pharmaceutical effluent degradation efficiency was up to 99.6%in this system.The degradation efficiency of CIP was maintained over 99.0%in five cyclic tests,further proving the excellent stability and reusability of the ZIF-67/PBC catalysts.（3）The paper-based carbon material loaded by a materials of institute Lavoisier MIL-101（Fe）,namely MIL-101（Fe）/PBC can adequately activate hydrogen peroxide（H₂O₂）to remove MDZ with predominant performance.The optimum conditions for the MDZ degradation were found at p H 3.0,the H₂O₂ dosage was 50 m M,and the catalyst concentration was 0.1 g/L in the MIL-101（Fe）/PBC+H₂O₂ system.99.6%of MDZ were degraded via H₂O₂activation within 60 minutes,the TOC removal efficiency reached 91.6%within 230 minutes,and the MDZ spiked pharmaceutical effluent degradation efficiency was up to 98.5%in this system.The degradation efficiency of MDZ was maintained over 99.0%in five cyclic tests,further proving the excellent stability and reusability of the MIL-101（Fe）/PBC catalysts.