Wastewater reuse in Mediterranean semi-arid areas: The impact of discharges of tertiary treated sewage on the load of polar micro pollutants in the Llobregat river (NE Spain)

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• 作者：Marianne K&#xf6 ; ck-Schulmeyer^a ; Antoni Ginebreda^a ; Cristina Postigo^a ; Rebeca L&#xf3 ; pez-Serna^a ; Sandra Pé ; rez^a ; ^{spsqam@cid.csic.es} ; Rikke Brix^a ; Marta Llorca^a ; Miren L&#xf3 ; pez de Alda^a ; Mira Petrović ; ^a ; ^c ; Antoni Munné ; ^d ; Lluí ; s Tirapu^d ; Damià ; Barcel&#xf3 ; ^a ; ^b
• 关键词：Micro contaminants ; LC– ; MS ; Wastewater treatment ; Water reuse ; Llobregat river ; Mass balances
• 刊名：Chemosphere
• 出版年：2011
• 出版时间：January 2011
• 年：2011
• 卷：82
• 期：5
• 页码：670-678
• 全文大小：610 K

文摘

The presence of sewage-borne micro contaminants in environmental waters is directly related to the discharge of treated effluents from wastewater treatment plants (WWTP) and the flow rate of the receiving river waters. Mediterranean rivers, in particular, are characterized by important fluctuations in the flow rates and heavy pollution pressures resulting from extensive urban, industrial and agricultural activities. This translates into contamination levels in these rivers often higher than those in other larger European basins. The present work provides an overview of the occurrence of five groups of organic contaminants (131 compounds) namely pharmaceuticals, illicit drugs, polar pesticides, estrogens, alkylphenols and related ethoxylates in WWTP tertiary treatment effluents. Data gathered during a period of water reuse carried out in the lower stretch of the Llobregat river (NE Spain), in the surroundings of the town of Barcelona as a consequence of the severe drought that took place along the years 2007–2008 are presented as illustrative example. In general, measured concentrations of the target compounds were in the low to mid ng L⁻¹ range. The total concentration of each compound class downstream to the discharge point was similar or slightly higher than that found upstream. Regarding the loads calculated for each compound, the relative contribution from the river upstream and the tertiary effluent were highly compound depending with no apparent trend. However, estimation of the overall bulk loads for each compound class determined in the Llobregat river showed the following rank order: pharmaceuticals > alkylphenols > pesticides > illicit drugs  estrogens.