動物廃棄物由来の機能化バイオ炭を用いた水溶液からのクロラムフェニコール系抗生物質の吸着除去

Owing to their multifaceted benefits in sustainability, superior material characteristics, and environmental applications, biochar-reinforced advanced nanocomposites have become a prominent research focus. The current study addresses the contamination of water sources by antibiotics, primarily chloramphenicol (CAP), and its removal using a biochar composite. The biochar composite (GMBC_ZIF-67) was synthesised from the manure of Capra aegagrus hircus following a cost-effective approach. Characterisation results revealed that the material has mesoporous pores/structure, with an average pore diameter of 3.829 nm and a surface area of 542.22 m²/g. Batch adsorption studies demonstrated excellent CAP removal, achieving up to 99.38 % efficiency. Kinetic analysis revealed that the pseudo-second-order and Elovich models best described the adsorption process, indicating that the adsorption rate is controlled by surface interactions and the number of available reactive sites. Additionally, a decrease in adsorption was observed with increasing adsorbate concentration. Adsorption isotherm experiments indicate monolayer adsorption of CAP onto the heterogeneous active sites of GMBC_ZIF-67. Comparative studies with goat manure biochar (GMBC) and other similarly prepared materials confirmed that GMBC_ZIF-67 achieved the highest CAP removal percentage. Regeneration studies for the material were conducted till the fourth cycle. Overall, this study advances a sustainable method of wastewater treatment by converting animal waste into effective adsorbents through ZIF-67 activation and addressing the issue of antibiotic contamination and its removal from water sources.