Uptake of carbamazepine by cucumber plants--a case study related to irrigation with reclaimed wastewater.
Reclaimed wastewater is an important source of irrigation in semiarid and arid zones. Here we report data on carbamazepine (CBZ) uptake by cucumber plants in hydroponic culture and greenhouse experiments using different soil types irrigated with fresh water or reclaimed wastewater. Data obtained from the hydroponic culture experiments suggest that CBZ is mainly translocated by water mass flow, and thus it is concentrated and accumulated to the largest extent in the mature/older leaves. Carbamazepine concentration in cucumber fruits and leaves was negatively correlated with soil organic matter content. The concentrations of CBZ in the roots and stems were relatively low, and most CBZ in the plant (76-84% of total uptake) was detected in the leaves. A greenhouse experiment using fresh water and reclaimed wastewater spiked, or not, with CBZ at 1 μg L(-1) (typical concentration in effluents) revealed that CBZ can be taken up and bioaccumulated from its background concentration in reclaimed wastewater. Bioaccumulation factor (calculated as the ratio of CBZ concentration in the plant to that in the soil solution) for the fruits (0.8-1) was significantly lower than the value calculated for the leaves (17-20). This study emphasizes the potential uptake of active pharmaceutical compounds by crops in organic-matter-poor soils irrigated with reclaimed wastewater and highlights the potential risks associated with this agricultural practice.
Department of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel.
Moshe
M
Shenker
Daniella
D
Harush
Julius
J
Ben-Ari
Benny
B
Chefetz
D057914:Agricultural Irrigation; D000927:Anticonvulsants / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D018553:Cucumis sativus / Q000187:drug effects / Q000378:metabolism*; D004049:Diethylcarbamazine / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D018527:Hydroponics; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity
D000927:Anticonvulsants; D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D004049:Diethylcarbamazine