Rodríguez-López Lucía, Santás-Miguel Vanesa, Cela-Dablanca Raquel, Núñez-Delgado Avelino, Álvarez-Rodríguez Esperanza, Rodríguez-Seijo Andrés, Arias-Estévez Manuel
Department of Plant Biology and Soil Science, Area of Soil Science and Agricultural Chemistry, Faculty of Sciences, University of Vigo, Ourense, 32004, Spain; Agroecology and Food Institute (IAA), University of Vigo - Campus Auga, 32004, Ourense, Spain.
Department of Plant Biology and Soil Science, Area of Soil Science and Agricultural Chemistry, Faculty of Sciences, University of Vigo, Ourense, 32004, Spain; Agroecology and Food Institute (IAA), University of Vigo - Campus Auga, 32004, Ourense, Spain.
J Environ Manage. 2024 Nov;370:122842. doi: 10.1016/j.jenvman.2024.122842. Epub 2024 Oct 11.
Antibiotics in the environment are considered emerging pollutants, with special relevance and concern due to the proliferation of antibiotic-resistant bacteria and genes. Therefore, finding ways to remediate antibiotics-contaminated soil and water through the use of bio-adsorbents is imperative. In this research, we investigate three by-products (hemp waste, oak ash, and mussel shell) as potential low-cost bio-adsorbents for the antibiotics Ciprofloxacin (CIP), Clarithromycin (CLA), and Trimethoprim (TRI), using batch-type and stirred flow chamber experiments to study their retention and release. The results indicate that hemp waste has higher sorption capacity for CIP and TRI (20891.8 and 2481.6 μmol L, respectively), while oak ash yields the highest retention for CLA (3078.4 μmol L). In addition, it was shown that the pH value significantly influences the sorption of these pollutants onto hemp waste. Among the three antibiotics, CLA was the most mobile, given the release experiments (903.9-1758.9 μmol kg), while ciprofloxacin (440.3-542.4 μmol kg) and trimethoprim (639.4-1652.1 μmol kg) are released less. Overall, the results of this research (the first of this kind including these antibiotics and sorbents simultaneously) suggest that while the individual antibiotics retention on each of the three by-products may not be entirely satisfactory, its potential combination (among them and/or with other low-cost sorbents) could significantly contribute to addressing antibiotics environmental pollution, favouring recycling and promoting a circular economy, which is a matter of global relevance.
环境中的抗生素被视为新兴污染物，鉴于抗生素耐药菌和基因的扩散，它们具有特殊的相关性并引发关注。因此，必须找到利用生物吸附剂修复受抗生素污染的土壤和水的方法。在本研究中，我们研究了三种副产品（大麻废料、橡木灰和贻贝壳）作为抗生素环丙沙星（CIP）、克拉霉素（CLA）和甲氧苄啶（TRI）潜在的低成本生物吸附剂，采用间歇式和搅拌流室实验来研究它们的吸附和释放情况。结果表明，大麻废料对CIP和TRI具有更高的吸附容量（分别为20891.8和2481.6 μmol/L），而橡木灰对CLA的吸附量最高（3078.4 μmol/L）。此外，研究表明pH值对这些污染物在大麻废料上的吸附有显著影响。在这三种抗生素中，根据释放实验结果，CLA的迁移性最强（903.9 - 1758.9 μmol/kg），而环丙沙星（440.3 - 542.4 μmol/kg）和甲氧苄啶（639.4 - 1652.1 μmol/kg）的释放量较少。总体而言，本研究结果（首次同时涉及这些抗生素和吸附剂）表明，虽然三种副产品对每种抗生素的单独吸附效果可能并不完全令人满意，但其潜在组合（它们之间和/或与其他低成本吸附剂）可能会对解决抗生素环境污染做出重大贡献，有利于回收利用并促进循环经济，这是一个具有全球意义的问题。
