Instituto de Física e Química, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil.
Instituto de Recursos Naturais, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil.
Environ Sci Pollut Res Int. 2017 Mar;24(7):6397. doi: 10.1007/s11356-017-8623-3.
Emerging contaminants including pharmaceuticals are a class of compounds that are causing great concern due to several environmental problems. Conventional water and wastewater treatments do not achieve high removal efficiencies for many of these drugs. Therefore, the present work investigated the removal of ibuprofen (IBP) by heterogeneous photocatalysis using TiO2 irradiated with artificial UV light or solar radiation. The treated solutions were tested against Daphnia similis and Raphidocelis subcapitata, which are species commonly used as bioindicators of environmental conditions. The results indicated that IBP removal reached 92% after 1 h of treatment using artificial UV and 1000 mg L of TiO, which was the optimum catalyst concentration in the range studied (20-1000 mg L). TOC removal reached up to 78% after 60 min of treatment using TiO/artificial UV. Ecotoxicological bioassays indicated that the treated solutions had acute effects, with 30% immobilization of D. similis and 40% growth inhibition of R. subcapitata.
新兴污染物包括药品，由于存在多种环境问题，这类化合物引起了极大关注。传统的水和废水处理方法并不能高效去除许多此类药物。因此，本研究采用 TiO2 光催化法，在人工紫外线或太阳辐射下处理布洛芬（IBP）。处理后的溶液用于检测大型蚤（Daphnia similis）和水蚤（Raphidocelis subcapitata），这两种生物通常被用作环境条件的生物指示剂。结果表明，在人工 UV 照射下，使用 1000mg/L 的 TiO2 处理 1 小时后，IBP 的去除率达到 92%，这是研究范围内（20-1000mg/L）最佳的催化剂浓度。使用 TiO2/人工 UV 处理 60 分钟后，TOC 的去除率高达 78%。生态毒理学生物测定表明，处理后的溶液具有急性毒性，大型蚤的固定率为 30%，水蚤的生长抑制率为 40%。
