發(fā)布者：抗性基因網(wǎng) 時間：2023-06-12 瀏覽量：320
摘要
? ? ? 人類通過暴露于水中的藥物污染物而面臨抗生素耐藥性基因（ARGs）和抗微生物耐藥性（AMR）的重大風(fēng)險，因此迫切需要具有成本效益的環(huán)境解決方案來緩解這場危機。本研究介紹了鐵改性泥炭和磁鐵礦松樹皮作為高效、低成本和綠色的生物吸附劑，用于吸附廢水中的藥物污染物。將從地下水處理污泥中提取的鐵改性的泥炭生物質(zhì)溶于酸中以制備鐵改性泥炭生物吸附劑，并將作為林業(yè)副產(chǎn)品的松樹皮與鐵鹽（Fe3+：Fe2+＝2∶1）混合以獲得磁鐵礦生物吸附劑。與甲氧芐啶相比，左氧氟沙星的吸附幾乎不受pH的影響。在180分鐘的接觸時間后，抗生素對兩種生物吸附劑的去除效率達到平衡。鐵改性泥炭對抗生素和磁鐵礦松樹皮的最大吸附量分別為153.0 mg/g和184.1 mg/L?；诟盗⑷~變換紅外光譜（FTIR）分析，提出了可能的抗生素吸附機理。用實際廢水進行的實驗表明，甲氧芐啶的去除率為56.6–84.3%（劑量：3 g/L）。此外，生物吸附劑還去除了多種其他藥物。
Abstract
Humans are at significant risk of antibiotic resistance genes (ARGs) and antimicrobial resistance (AMR) via exposure to pharmaceutical contaminants in water, so there is a strong need for cost-effective environmental solutions to mitigate this crisis. This study introduces iron-modified peat and magnetite-pine bark as efficient, low-cost and green biosorbents for the adsorption of pharmaceutical contaminants from wastewater. Peat biomass, modified by iron extracted from a groundwater treatment sludge was dissolved in acid to prepare the iron-modified peat biosorbent, and pine (Pinus sylvestris) bark as a forest industry by-product was mixed with iron salts (Fe3+: Fe2+ = 2:1) to obtain the magnetite biosorbent. The adsorption of levofloxacin was little influenced by pH compared to trimethoprim. The equilibrium removal efficiency of antibiotics over both biosorbents was reached after 180 min contact time. The maximum adsorption capacity over iron-modified peat was about 200 mg/g for both antibiotics and over magnetite-pine bark 153.0 mg/g for levofloxacin and 184.1 mg/L for trimethoprim. Possible antibiotic adsorption mechanisms were proposed based on the Fourier transform infrared spectroscopy (FTIR) analysis. Experiments with real wastewater effluent revealed trimethoprim removal of 56.6–84.3% (dosage: 3 g/L). Moreover, a variety of other pharmaceuticals were removed by the biosorbents.
https://www.sciencedirect.com/science/article/pii/S0926669023002558