發(fā)布者：抗性基因網(wǎng) 時(shí)間：2023-06-12 瀏覽量：419
摘要
? ? ? 使用生化甲烷電位測(cè)試，在兩種氧化石墨烯濃度（每克揮發(fā)性固體0.025和0.075克氧化石墨烯）下，研究了氧化石墨烯對(duì)廢活性污泥厭氧消化的影響。在厭氧處理之前和之后，在固相和液相中監(jiān)測(cè)36種藥物的出現(xiàn)。氧化石墨烯的加入提高了檢測(cè)到的大多數(shù)藥物的去除率，即使是那些被認(rèn)為對(duì)生物降解具有持久性的藥物，如阿奇霉素、卡馬西平和雙氯芬酸。在沒(méi)有氧化石墨烯和氧化石墨烯濃度最低的情況下，沒(méi)有觀察到甲烷的最終比產(chǎn)量有顯著差異，但氧化石墨烯的最高濃度部分抑制了甲烷的產(chǎn)生。添加氧化石墨烯不影響抗生素抗性基因的相對(duì)豐度。最后，通過(guò)添加氧化石墨烯，檢測(cè)到包括細(xì)菌和古菌在內(nèi)的微生物群落的顯著變化。
Abstract
The effect of graphene oxide on the anaerobic digestion of waste activated sludge was investigated at two graphene oxide concentrations (0.025 and 0.075 g graphene oxide per g volatile solids) using biochemical methane potential tests. The occurrence of 36 pharmaceuticals was monitored in the solid and liquid phases before and after the anaerobic treatment. The addition of graphene oxide improved the removal of most pharmaceuticals detected, even those that are considered persistent to biological degradation, such as azithromycin, carbamazepine, and diclofenac. No significant differences were observed in the final specific methane production without graphene oxide and with the lowest graphene oxide concentration, yet the highest graphene oxide concentration partially inhibited methane production. The relative abundance of antibiotic resistance genes was not affected by the graphene oxide addition. Finally, significant changes in the microbial community including bacteria and archaea were detected with graphene oxide addition.
https://www.sciencedirect.com/science/article/pii/S0269749123003457