城市河流中WWMPs的迁移转化试验

发布时间：2019-04-11 14:22

【摘要】：为研究城市河流中WWMPs(污水印记药物)的迁移转化行为,以13种典型WWMPs[AZM(阿奇霉素)、CLM(克拉霉素)、STZ(磺胺噻唑)、TMP(甲氧苄啶)、ATL(阿替洛尔)、PNL(普萘洛尔)、DCF(双氯芬酸)、CLF(氯贝酸)、IBU(布洛芬)、CBM(卡马西平)、CAF(咖啡因)、PRC(扑热息痛)和TCS(三氯生)]为目标物,通过生物降解试验、吸附试验及光降解试验分析目标物主要的迁移转化机理.结果表明,AZM、CLM、PRC的降解主要是生物作用,不灭菌且有氧条件下的降解率分别可达90%、95%、100%.沉积物对CBM的吸附作用明显,但其难以被水解和生物降解,而且其吸附和解吸是一个相对平衡的过程,导致CBM能够稳定存在.ATL、STZ、PRC和TMP这4种亲水性化合物不易被沉积物吸附,其余9种属疏水性化合物的吸附能力取决于其KOW(辛醇-水分配系数).此外,光降解试验表明,在实际环境中,很多目标物受颗粒物和光敏剂的影响,不易发生直接光降解,TMP、DCF、PNL、CAF和TCS容易发生光降解作用,其在光照和避光的条件下降解率分别为20%和10%、58%和25%、22%和5%、20%和2%、30%和5%.研究显示,城市河流中的WWMPs在生物降解、吸附和光降解共同作用下有明显的降解效果.
[Abstract]:In order to study the migration and transformation behavior of WWMPs in urban rivers, 13 typical WWMPs [AZM (Azithromycin), CLM (), STZ (sulfathiazole), TMP (trimethoprim), ATL (atenolol)] were used. PNL (propranolol), DCF (diclofenac), CLF (chlorbeate), IBU (ibuprofen), CBM (carbamazepine), CAF (caffeine), PRC (paracetamol) and TCS (triclosan) were tested for biodegradation, Adsorption test and photodegradation test were used to analyze the main migration and transformation mechanism of the target. The results showed that the degradation of AZM,CLM,PRC was mainly biological, and the degradation rates were 90%, 95% and 100% respectively under non-sterilization and aerobic conditions. The adsorption of CBM by sediment is obvious, but it is difficult to be hydrolyzed and biodegraded, and its adsorption and desorption is a relatively equilibrium process, leading to the stable existence of CBM. ATL, STZ, Four hydrophilic compounds, PRC and TMP, are not easily adsorbed by sediment. The adsorption capacity of the remaining nine hydrophobic compounds depends on their KOW (octanol-water partition coefficient). In addition, photodegradation tests show that in the real environment, many target substances are affected by particles and photosensitizers, so it is not easy to take place direct photodegradation, and TMP,DCF,PNL,CAF and TCS are prone to photodegradation. The degradation rates were 20% and 10%, 58% and 25%, 22% and 5%, 20% and 2%, 30% and 5%, respectively. The results showed that the degradation of WWMPs in urban rivers was obvious under the action of biodegradation, adsorption and photodegradation.
【作者单位】：上海理工大学环境与建筑学院;
【基金】：国家自然科学基金项目(51279108) 上海市科学技术委员会基础研究重大项目(13DJ1400105)
【分类号】：X52

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