کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6332496 1619794 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ibuprofen adsorption in four agricultural volcanic soils
ترجمه فارسی عنوان
جذب ایبوپروفن در چهار خاک های آتشفشانی کشاورزی
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
Ibuprofen (IB) is a high environmental risk drug and one of the most frequently prescribed in human medicine. Recently, IB has been detected in Gran Canaria in reclaimed water for irrigation and in groundwater. Adsorption was studied in four volcanic soils from three islands of the Canarian Archipelago. Once the biodegradation process has been excluded from the experimental conditions, a batch method was applied using initial concentrations of 1-5-10-20-50-100-200 mgL- 1 and two soil/water ratios (w/V): 1:5 (OECD, 2000) and 1:1. Non-linear and linearized Langmuir and Freundlich equations were well fitted. The wide IB range tested in our batch studies allowed us to measure experimental adsorption values close to the maximum adsorption capacity (Smax) as estimated by Langmuir, making it possible thereby to validate the use of the Langmuir equation when there is a burst of contamination at high concentration. The distribution coefficient (Kd), Smax and Retardation Factor (RF) varied from 0.04 to 0.5 kgL- 1, 4-200 mgkg- 1 and 1.2-1.9, respectively. The lowest Smax and Kd values were found for the 1:1 S/W ratio whereas most batch studies employ 1:5 S/W ratios, thus obtaining higher adsorption parameters than when considering field conditions (1:1). Despite the high anion retention of andic soils, similar Kd and RF to those reported for other soils were obtained in 1:5, while high Smax was found. Our results demonstrate that IB adsorption in volcanic areas responds not only to the soil properties commonly cited in adsorption studies, but also depends on andic properties, sorbent concentration and Dissolved Organic Carbon, the higher values of which are related to the lower Kd and Smax. The low RF and low detection frequency of the IB in groundwater suggests that a) reclaimed water irrigation is not the main source of IB, and b) the existence of some uncontrolled water disposal points in the zone.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 468–469, 15 January 2014, Pages 406-414
نویسندگان
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