Response of Lemna gibba L. to high and environmentally relevant concentrations of ibuprofen: Removal, metabolism and morpho-physiological traits for biomonitoring of emerging contaminants

被引:61
作者
Di Baccio, D. [1 ]
Pietrini, F. [1 ]
Bertolotto, P. [1 ]
Perez, S. [2 ]
Barcelo, D. [2 ]
Zacchini, M. [1 ]
Donati, E. [3 ]
机构
[1] CNR, Inst Agroenvironm & Forest Biol, Monterotondo, RM, Italy
[2] IDAEA CSIC, Dept Environm Chem, Barcelona, Spain
[3] CNR, Inst Chem Methodol, Monterotondo, RM, Italy
关键词
Biodegradation; Carboxyibuprofen; Chlorophyll fluorescence; Duckweed; Hydroxyibuprofen; Photosynthesis; PERSONAL CARE PRODUCTS; WASTE-WATER; CHLOROPHYLL FLUORESCENCE; ORGANIC CONTAMINANTS; GREEN-ALGAE; PHARMACEUTICALS; GROWTH; FRESH; PLANT; PHOTOSYNTHESIS;
D O I
10.1016/j.scitotenv.2016.12.191
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The increasing worldwide consumption of pharmaceuticals and personal care products such as ibuprofen (IBU) is leading to the widespread and persistent occurrence of these chemicals and their transformation products in soils and waters. Although at low concentrations, the continuous discharge of these micropollutants and the incomplete removal by the actual wastewater treatments can provoke accumulation in the environment with risks for the trophic chain. Non-target organisms as duckweed can be used for the environniental monitoring of pharmaceutical emerging contaminants. In this work, plants of Lama gibba L were exposed to high (020 and 1 mg L-1) and environmentally relevant (0.02 mg L-1) concentrations of IBU to investigate their removal and metabolization capacity. The main oxidized IBU metabolites in humans (hydroxy-IBU and carboxy-IBU) Were determined in tht intact plants and in the growth solutions, together with non-destructiVe physiological parameters and phytotoxic indicators. The IBU uptake increased with the increasing of IBU concentration in the medium, but the relative accumulation of the pharmaceutical and generation of hydroxy-IBU was higher in presence of the lower IBU treatments. Carboxy-IBU was not found in the plant tissue and solutions. The changes observed in growth and photosynthetic performances were not able to induce phyto-toxic effects. Apart from a mean physical-chemical degradation of 82%, the IBU removal by plants was highly efficient (89-92.5%) in all the conditions tested, highlighting the role of L gibba in the biodegradation of emerging contaminants. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:363 / 373
页数:11
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