Removal of sulfonamide antibiotics and human metabolite by biochar and biochar/H2O2 in synthetic urine
Removal of sulfonamide antibiotics and human metabolite by biochar and biochar/H2O2 in synthetic urine
复制标题
生物炭和生物炭/H2O2 去除合成尿液中的磺酰胺类抗生素和人体代谢物
DOI：
10.1016/j.watres.2018.09.051
复制
发表时间：
2018-12-15
期刊：
影响因子：
12.8
通讯作者：
Ren, Jing
中科院分区：
文献类型：
--
作者：
Sun, Peizhe;Li, Yaxiu;Ren, Jing
源分离的尿液已越来越被视为一种有前途的替代废物流，有效地去除药物和人体代谢物。本研究探讨了去除磺胺类抗生素，其中一类最常见的抗生素在环境中，生物炭和生物炭/H2 O2合成尿基质。研究了磺胺甲恶唑、磺胺嘧啶、磺胺二甲嘧啶、磺胺二甲氧嘧啶4种母体磺胺类抗生素及其人体代谢产物N-4-乙酰磺胺甲恶唑（简称SAs）的吸附和降解。以棉秆为原料制备的生物炭作为吸附剂吸附水杨酸和催化剂催化过氧化氢。结果表明，与磷酸盐缓冲溶液相比，水杨酸在尿液中的吸附受到抑制。尿液中的Bicycline产生主要影响。吸附过程符合Langmuir等温模型。吸附和解吸速率估计的动力学模型，很好地拟合去除SA从水相在不同的生物炭剂量。生物炭对水杨酸的吸附是由多种作用力共同作用的结果，其中货车范德华力和疏水性是区分不同水杨酸吸附行为的主要因素。为了破坏SA，将H2 O2与生物炭一起加入。除N-4-乙酰基-磺胺甲恶唑外，所有母体SA均可在尿液基质中降解。在生物炭/H2 O2体系中，生物炭活化过一碳酸根产生的碳酸根自由基是主要的反应活性物种。(C)2018爱思唯尔有限公司版权所有。
Source-separated urine has been increasingly regarded as a promising alternative waste-stream for effectively removing pharmaceuticals and human metabolites. This study investigated the removal of sulfonamide antibiotics, one category among the most frequently detected antibiotics in the environment, by biochar and biochar/H2O2 in synthetic urine matrix. The adsorption and degradation of four parent sulfonamide antibiotics, including sulfamethoxazole, sulfadiazine, sulfamethazine, sulfa-dimethoxine, and one human metabolite, N-4-acetyl-sulfamethoxazole (together referred as SAs) were investigated. Biochar derived from cotton straw was applied as adsorbent for SAs and catalyst for H2O2. Results showed that the adsorption of SAs was inhibited in urine compared with that in phosphate buffer solution. Bicarbonate in urine placed major influence. Langmuir isotherm model well described the adsorption process in both buffer and urine matrices. Adsorption and desorption rates were estimated by a kinetic model, which well fitted the removal of SAs from aqueous phase at various biochar doses. The adsorption of SAs on biochar was due to multiple forces, in which van der Waals forces and hydrophobicity played major roles in distinguishing the sorption behavior of different SAs. To destruct the SAs, H2O2 was added with biochar. Except for N-4-acetyl-sulfamethoxazole, all the parent SAs can be degraded in urine matrix. Carbonate radical, produced from the activation of peroxymonocarbonate by biochar, was proposed to be the major contributing reactive species in biochar/H2O2 system in urine matrix. (C) 2018 Elsevier Ltd. All rights reserved.