Soil and Water Sciences Department, University of Florida, Gainesville, FL, USA.
Int J Phytoremediation. 2020;22(12):1304-1312. doi: 10.1080/15226514.2020.1768511. Epub 2020 Jun 5.
Surface water bodies worldwide may be contaminated with various organic contaminants. In many cases, the actual toxicity thresholds to nontarget organisms are unknown, thus presenting unknown risks. This study evaluated the potential use of floating treatment wetlands (FTWs) planted with (common name: Canna) for removing two pharmaceuticals (acetaminophen and carbamazepine) and one herbicide (atrazine) from contaminated water. Triplicate FTWs with varying plant densities were established in 378 L mesocosms. After dosing the mesocosms with the contaminants, water samples were collected over a 12-week period for analysis. The planted FTWs showed differing abilities for removing acetaminophen, atrazine, and carbamazepine. Plant densities on the FTWs did not affect dissipation of acetaminophen or atrazine, but did carbamazepine. All acetaminophen residues were removed from the water within 2 weeks, while all atrazine residues were removed within 12 weeks. Approximately, 79-92% of these residues removed were associated with the FTWs. In contrast, all of the carbamazepine was not removed after 12 weeks, at which time only 29-36.7% of the total removed was associated with the FTWs. Overall results suggest that FTWs established with are promising for removing trace concentrations of acetaminophen, atrazine, and carbamazepine from surface water.
全球地表水可能受到各种有机污染物的污染。在许多情况下，非目标生物的实际毒性阈值是未知的，因此存在未知的风险。本研究评估了种植（俗称：姜荷花）的浮式处理湿地 (FTWs) 从受污染的水中去除两种药物（对乙酰氨基酚和卡马西平）和一种除草剂（阿特拉津）的潜力。在 378 升中培养了具有不同植物密度的重复 FTWs。在给中培养箱加药后，在 12 周的时间内收集水样进行分析。种植的 FTWs 表现出不同的去除能力对乙酰氨基酚、阿特拉津和卡马西平。FTWs 上的植物密度不影响对乙酰氨基酚或阿特拉津的消散，但会影响卡马西平。所有的对乙酰氨基酚残留都在 2 周内从水中去除，而所有的阿特拉津残留都在 12 周内去除。大约，79-92%的这些被去除的残留物与 FTWs 有关。相比之下，12 周后，所有的卡马西平都没有被去除，此时只有 29-36.7%的总去除量与 FTWs 有关。总体结果表明，建立在姜荷花上的 FTWs 有望从地表水去除痕量浓度的对乙酰氨基酚、阿特拉津和卡马西平。
