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首页> 外文期刊>Journal of Environmental Quality >Occurrence of carbamazepine in soils under different land uses receiving wastewater.
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Occurrence of carbamazepine in soils under different land uses receiving wastewater.

机译：卡马西平在接受废水的不同土地利用下的土壤中发生。

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Due to its resistance to many wastewater treatment processes, the antiepileptic drug carbamazepine (CBZ) is routinely found in wastewater effluent. Wastewater irrigation is an alternative to stream discharge of wastewater effluent, which utilizes the soil as a tertiary filter to remove excess nutrients and has the potential to remove pharmaceutical compounds. Previous data suggest that CBZ is strongly sorbed to soil; however, it is unknown what its fate is for long periods of irrigation and if land use affects its distribution. Therefore, the objectives of our research were to characterize CBZ concentrations in soils that have been receiving wastewater irrigation for >25 yr under three different land uses: cropped, grassed, and forested. Triplicate soil cores were collected at each of the land uses to a depth of 120 cm. Extractions for CBZ were performed using 5-g soil samples and 20 mL of acetonitrile. The extracted solutions were analyzed on a liquid chromatograph tandem mass spectrometer. The samples were also analyzed for supporting information such as organic carbon, pH, and electrical conductivity. Results suggest that there is accumulation of the CBZ in the surface soils, which have the highest organic carbon content. Average concentrations of CBZ in the surface soils were 4.92, 2.9, and 1.92 ng g, for the forested, grassed, and cropped land uses, respectively. The majority of the CBZ was found in the upper 30 cm of the profile. Our results suggest that the soils adsorb CBZ and slow its movement into groundwater, compared to the movement of nonadsorbed chemicals
机译：由于其对许多废水处理过程的抵抗力，因此经常在废水中发现抗癫痫药卡马西平（CBZ）。废水灌溉是废水排放的一种替代方法，该方法利用土壤作为第三级过滤器去除多余的养分，并具有去除药物化合物的潜力。先前的数据表明，CBZ被强烈吸附到土壤中;但是，长期灌溉以及土地使用是否会影响其分配，其命运将是未知的。因此，我们研究的目的是表征在三种不同的土地利用方式下，已接受废水灌溉超过25年的土壤中的CBZ浓度：种植，草木和林木。在每种土地用途下收集一式三份的土壤核心，深度为120厘米。使用5 g土壤样品和20 mL乙腈萃取CBZ。提取的溶液在液相色谱串联质谱仪上分析。还分析了样品的支持信息，例如有机碳，pH和电导率。结果表明，表层土壤中有CBZ的积累，有机碳含量最高。对于森林，草场和农用地而言，表层土壤中CBZ的平均浓度分别为4.92、2.9和1.92 ng g。 CBZ的大部分位于剖面的上部30 cm。我们的结果表明，与未吸附化学物质的运动相比，土壤吸附CBZ并减慢了其向地下水的运动

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